Slide Gate Plate
Introduction
Changxing Refractory manufacture various types of slide gate plate, such as 1qc slide gate plate, 2qc slide gate plate. Changxing Refractory slide gate plate uses sintered alumina and mullite as raw material, then be added into some of the carbon matrix components and anti-oxidant(such as aluminum, silicon metal, SiC, B4C, Mg-B and so on), adding binder pitch or phenolic resin mixed with coal Nerishige type, fired in a reducing atmosphere to form alumina oxide carbon refractories sliding gate plate. Slide gate plates fired at high temperatures cover Al2O3-C based, Al2O3-ZrO2-C based and MgO-spinel based, Changxing Refractory supports the customer in flow control offering a range of ladle slide gate products. We have a wide range of refractory materials for achieving consistent and reliable high performance in all areas of slide gate applications. Balanced refractory life of plates, ladle nozzles and well blocks enables a cost-effective operation. Slide gate plate can be used for ladle and tundish.
Advantages
1. High strength
2. Good erosion resistance
3. Excellent thermal shock resistance
Application
The slide gate plate is the best choice for large and medium sized ladles and con-casting tundish. It can meet various needs of different steel grades.
Contect source:
http://www.yilongrefractory.com/ProductServletOne?id1=4&id=53
2016年10月28日星期五
2016年10月25日星期二
Aluminum Carbon Long Nozzle (Ladle Shroud)
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Aluminum Carbon Long Nozzle (Ladle Shroud) |
Introduction
Based on function categories, Changxing Refractory aluminium carbon long nozzles(also called Ladle Shroud, Long Nozzle) can be classified into preheating refractory nozzle, non-preheating refractory nozzle, argon blowing nozzle and not argon blowing nozzle; and according to material quality, ladle shroud are mainly classified into aluminum carbon, aluminum-zirconia carbon and alumina-magnesia carbon. This kind of refractory nozzle is provided with good liquid steel washing resistance performance and liquid steel erosion performance in the course of use, which can effectively prevent oxidation of air to liquid steel and its spatter.
Advantages and Application
Changxing Refractory ladle shroud enjoys performances of purifying liquid steel, prevent liquid steel oxidation, with good liquid steel washing resistance and erosion resistance.
Content source:
http://www.yilongrefractory.com/ProductServletOne?id1=3&id=50
2016年10月24日星期一
High Temperature Refractory for Furnace - Ceramic Fiber Paper
product manual:
With ceramic fiber as the main raw material, made by wet forming process, with high temperature resistance, chemical corrosion, thermal shock, low thermal conductivity, high electrical Insulating Bricks strength and high elastic modulus and other properties. It is characterized by no asbestos, fiber length, less slag balls, small bulk density, good elasticity, Easy to punching, winding and other construction operations. It is suitable for high temperature insulation, heat insulation, sealing, electric insulation, sound absorption and filtering fiber distribution, color white, no delamination, less slag ball (four centrifugal slag), bulk density according to the use of flexible adjustment, increase Strong fiber), mechanical processing and strong, can replace asbestos products, is a high-grade lightweight refractories. Non-brittle material, good toughness, high compressive strength, good flatness, size regularity, excellent mechanical properties and easy construction of any shear bending. Is the kiln And other thermal equipment wall lining, the ideal backing material.
Ceramic Fiber Paper Application:
Industrial kiln wall lining, masonry insulation layer High temperature ceramic kiln kiln lining, kiln car, furnace door baffle, kiln furnace temperature partition board high temperature high heat equipment thermal insulation Aerospace, shipbuilding industry insulation, fire protection, Insulation, insulation - Technical features: low thermal conductivity, low heat capacity, excellent Thermal stability and thermal shock resistance high compressive strength, and has good toughness!
⊙ Typical Applications:
● a variety of industrial furnaces and ladle, casting barrels, immersion nozzle of the high-temperature insulation materials;
● electric insulation and insulation materials for industrial furnaces;
● door and furnace expansion joint sealing material;
● cast aluminum model lining;
● stripping of glass-ceramic and hot-melt (curved) glass;
● high temperature gasket materials;
● muffler insulation muffler materials, exhaust pipe insulation materials, anti-sintering isolation materials.
Refractory company Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
With ceramic fiber as the main raw material, made by wet forming process, with high temperature resistance, chemical corrosion, thermal shock, low thermal conductivity, high electrical Insulating Bricks strength and high elastic modulus and other properties. It is characterized by no asbestos, fiber length, less slag balls, small bulk density, good elasticity, Easy to punching, winding and other construction operations. It is suitable for high temperature insulation, heat insulation, sealing, electric insulation, sound absorption and filtering fiber distribution, color white, no delamination, less slag ball (four centrifugal slag), bulk density according to the use of flexible adjustment, increase Strong fiber), mechanical processing and strong, can replace asbestos products, is a high-grade lightweight refractories. Non-brittle material, good toughness, high compressive strength, good flatness, size regularity, excellent mechanical properties and easy construction of any shear bending. Is the kiln And other thermal equipment wall lining, the ideal backing material.
Ceramic Fiber Paper Application:
Industrial kiln wall lining, masonry insulation layer High temperature ceramic kiln kiln lining, kiln car, furnace door baffle, kiln furnace temperature partition board high temperature high heat equipment thermal insulation Aerospace, shipbuilding industry insulation, fire protection, Insulation, insulation - Technical features: low thermal conductivity, low heat capacity, excellent Thermal stability and thermal shock resistance high compressive strength, and has good toughness!
⊙ Typical Applications:
● a variety of industrial furnaces and ladle, casting barrels, immersion nozzle of the high-temperature insulation materials;
● electric insulation and insulation materials for industrial furnaces;
● door and furnace expansion joint sealing material;
● cast aluminum model lining;
● stripping of glass-ceramic and hot-melt (curved) glass;
● high temperature gasket materials;
● muffler insulation muffler materials, exhaust pipe insulation materials, anti-sintering isolation materials.
Refractory company Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
High temperature refractory insulation material for kiln - ceramic fiber cotton
Product manual:
The basic characteristics of the ceramic fiber loose cotton are the stable performance, light weight, low heat capacity, good thermal shock resistance, erosion resistance and sound absorption performance under the high temperature condition. Modern high-tech light-resistant materials can make suitable for special requirements, full Foot customer needs. Ceramic fiber cotton Silicate fiber cotton with stable performance, fiber length, tensile strength, large slag ball, high thermal stability, color,white and so on. Classification temperature 1050-1600 ℃. Is the production of fiber textile materials of choice, but also high temperature environment Sealing, filling and insulation of the ideal refractory material.
Product Features:
Low thermal conductivity, thermal shock resistance, high flexibility, good sound-absorbing properties, without any binder and other corrosive substances, high temperature is still loose and flexible and has good flexibility Anti-corrosion, excellent sound absorption, excellent Thermal stability.
Typical application:
Industrial ceramic fiber wet raw materials; ceramic fiber unshaped products of raw materials; high-temperature furnace, heating device, wall lining gap filler and so on.
First, as the base material, can be used as plate, paper, vacuum forming parts and other fiber deep processing of raw materials
Second, the expansion joints or short-term insulation repair filler material
Third, thermal insulation concrete and composite reinforcement
Four; high-temperature furnace, heating devices, wall lining gap filler with ceramic fiber cotton
Note: Because of its high performance characteristics, will be a revolutionary solution to a variety of technical problems, its application areas for metallurgy, ceramics, electronics, building materials, automotive, aerospace, glass and so on.
Refractory company Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick for sale, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
The basic characteristics of the ceramic fiber loose cotton are the stable performance, light weight, low heat capacity, good thermal shock resistance, erosion resistance and sound absorption performance under the high temperature condition. Modern high-tech light-resistant materials can make suitable for special requirements, full Foot customer needs. Ceramic fiber cotton Silicate fiber cotton with stable performance, fiber length, tensile strength, large slag ball, high thermal stability, color,white and so on. Classification temperature 1050-1600 ℃. Is the production of fiber textile materials of choice, but also high temperature environment Sealing, filling and insulation of the ideal refractory material.
Product Features:
Low thermal conductivity, thermal shock resistance, high flexibility, good sound-absorbing properties, without any binder and other corrosive substances, high temperature is still loose and flexible and has good flexibility Anti-corrosion, excellent sound absorption, excellent Thermal stability.
Typical application:
Industrial ceramic fiber wet raw materials; ceramic fiber unshaped products of raw materials; high-temperature furnace, heating device, wall lining gap filler and so on.
First, as the base material, can be used as plate, paper, vacuum forming parts and other fiber deep processing of raw materials
Second, the expansion joints or short-term insulation repair filler material
Third, thermal insulation concrete and composite reinforcement
Four; high-temperature furnace, heating devices, wall lining gap filler with ceramic fiber cotton
Note: Because of its high performance characteristics, will be a revolutionary solution to a variety of technical problems, its application areas for metallurgy, ceramics, electronics, building materials, automotive, aerospace, glass and so on.
Refractory company Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick for sale, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
Selection Principle and General Method of Refractory for Furnace
The main performance of the furnace is mainly determined by the technical and economic performance of the refractory insulation material, which directly affects the investment cost, working performance, thermal efficiency and running energy consumption of the kiln. Select the general principles of fire-resistant insulation materials:
1, the performance of the kiln and thermal characteristics, such as the gap between the work of the kiln should use low heat capacity of the material;
2, the safe use of materials temperature, thermal conductivity system, high temperature strength, chemical stability;
3, the use of life;
4, investment costs and operating maintenance costs.
In general, heavy refractory material is more focused on a technical performance indicators, such as high temperature stability, chemical stability; light weight insulation materials pay more attention to investment and operation of the integrated technical and economic indicators.
When using lightweight insulation materials, the general thermal insulation material thermal conductivity (λ) and the cost per unit volume of insulation material (P) to determine, "λP" product value as small as possible. Thermal conductivity value is small, indicating the insulation effect of insulation materials, running the energy costs low. Low cost per unit volume of insulation material that investment costs are low, with good investment in economic results. Can be plotted with coordinate mapping choice, the abscissa for the operating temperature, the vertical coordinate (λP) good product, with the safe use of materials, intercept the temperature curve of the material, Select the technical and economic performance of the material.
Refractory company Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
1, the performance of the kiln and thermal characteristics, such as the gap between the work of the kiln should use low heat capacity of the material;
2, the safe use of materials temperature, thermal conductivity system, high temperature strength, chemical stability;
3, the use of life;
4, investment costs and operating maintenance costs.
In general, heavy refractory material is more focused on a technical performance indicators, such as high temperature stability, chemical stability; light weight insulation materials pay more attention to investment and operation of the integrated technical and economic indicators.
When using lightweight insulation materials, the general thermal insulation material thermal conductivity (λ) and the cost per unit volume of insulation material (P) to determine, "λP" product value as small as possible. Thermal conductivity value is small, indicating the insulation effect of insulation materials, running the energy costs low. Low cost per unit volume of insulation material that investment costs are low, with good investment in economic results. Can be plotted with coordinate mapping choice, the abscissa for the operating temperature, the vertical coordinate (λP) good product, with the safe use of materials, intercept the temperature curve of the material, Select the technical and economic performance of the material.
Refractory company Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
2016年10月19日星期三
How to Choose Refractory Brick Molding Equipment
Refractory plant Refractory company plant new shape, you must buy the press. If such enterprises for small and medium-sized manufacturing plant, according to the current and future production of products may choose the right tonnage friction press. Because of the low price of friction press, operation and maintenance is simple, more suitable for small and medium enterprises.
Expansion or technological transformation of enterprises, according to need to purchase some brick press. For large and medium-sized refractory material production enterprises, if you need to produce high-grade products or high-performance products, according to the specific product selection of suitable molding equipment. Such as the production of functional refractories dry vibration mix and other special products, such as optional hydrostatic forming device; such as the production of high-grade lining brick, can choose more advanced hydraulic press machine or a vacuum function of the press, can also use large tonnage Friction press brick.
Older machine update is relatively simple, according to the original models and have advanced to buy the more advanced press or other molding equipment.
The purchase of molding equipment and purchase other equipment, is to consider a number of factors to decide, and not ladle gunning mix above the situation can be summarized. For small and medium enterprises, the production plant can refer to other molding equipment to choose, in addition, the purchase of molding equipment, technical parameters should be surplus, there should be a certain sense of advance to meet the continuous development of technology and production needs.
Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, tundish coating, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
Expansion or technological transformation of enterprises, according to need to purchase some brick press. For large and medium-sized refractory material production enterprises, if you need to produce high-grade products or high-performance products, according to the specific product selection of suitable molding equipment. Such as the production of functional refractories dry vibration mix and other special products, such as optional hydrostatic forming device; such as the production of high-grade lining brick, can choose more advanced hydraulic press machine or a vacuum function of the press, can also use large tonnage Friction press brick.
Older machine update is relatively simple, according to the original models and have advanced to buy the more advanced press or other molding equipment.
The purchase of molding equipment and purchase other equipment, is to consider a number of factors to decide, and not ladle gunning mix above the situation can be summarized. For small and medium enterprises, the production plant can refer to other molding equipment to choose, in addition, the purchase of molding equipment, technical parameters should be surplus, there should be a certain sense of advance to meet the continuous development of technology and production needs.
Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, tundish coating, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
Development Prospect of Refractories in China
In recent years, the level of China's refractory material industry has also been increasing, but the general demand for refractories will be substantially reduced, and high-quality, long life, high efficiency, functional refractories and the corresponding increase in demand, refractory dry vibration mix enterprises need to continuously improve the comprehensive Strength, in particular, to improve research and innovation capacity, and constantly develop high-life refractory products to meet the needs of users. In order to achieve the high life of refractories, in addition to improving the performance of refractory itself, the application of refractory technology is also very important to increase the comprehensive application of refractory technology research and development of refractory high life to meet the high-temperature steel and other industries to reduce fire Material consumption needs.
The future of refractory tundish castable technology will be longevity, low consumption, energy saving, environmental protection, low carbon, recycling and functional integration of the direction of research and innovation, thereby enhancing the comprehensive service capabilities, from the overall upgrading of China's international competitiveness of refractory industry , Refractory industry will also lead the development of China's special materials industry, technological revolution and rapid development.
(A) the development of energy-saving environment-friendly refractory industry
Refractory material is an important auxiliary material in the steel industry, and has wide application in the national steel industry. At present, China's annual consumption of refractories is about 10 million t, with the use of waste refractories to 400 million t, the proportion of refractory refractory refractory consumption of 45% of the total. If the recycling of refractory materials can be recycled high-grade raw materials, the use of renewable raw materials and optimize their bonding agent and additives, not only can produce high-quality unshaped refractories, but also produce high-quality shaped refractory, but also large Reducing the cost of preparation of refractories; not only saves the country's mineral resources and energy, but also reduces environmental pollution, can effectively reduce product costs and promote the overall development of the steel industry, economic and social benefits significantly.
Therefore, the refractory enterprises need to further improve the production level of all-round, and gradually the full use of clean, low-carbon environment-friendly energy, increase efforts to improve the recycling of waste refractory, waste refractory comprehensive utilization technology, Waste heat utilization technology, vigorously develop the circular economy, as far as possible to reduce the production process of waste emissions, to avoid the production of waste on the environment pollution. In addition, enterprises should speed up the elimination of production capacity inefficient production equipment, increasing the share of unshaped refractories, vigorously develop low-temperature sintering or burning and other new technologies, fundamentally improve the ability of sustainable development of refractories.
(B) the development of internationally competitive refractory industry
Competitiveness has always been the problem of all walks of life has always attached importance to, but also the fundamental survival of enterprises. The future development of China's refractory industry, will focus on the international, seeking to achieve greater development in the world and profitability. In recent years, with the continuous development of refractory industry, China's refractory production level is close to or reached the international advanced level, product cost, quality are strong international market competitiveness. Products not only by Southeast Asia, the Middle East and other developing countries of all ages, but also a large number of exports to Europe and the United States and other developed countries, and achieved good results, which also shows that China's refractories enterprises are not satisfied with the domestic marketing, Has been very far-sighted in this larger stage in the world to obtain greater profits, and also proved that China's refractory products have the strength and ability to achieve significant international development.
(C) the development of comprehensive technical level of refractory industry
Refractory material industry with comprehensive technical level not only refers to producing refractory products with good quality, environmental protection, light quality and other high-quality features, but also refers to the production of refractory matching equipment with long life, good performance, high yield and other high-quality features. Comprehensive technical level of assessment factors, involving refractory products and production equipment, such as a set of process, as well as a high level of product development, supervision and management personnel and other factors, the comprehensive evaluation of these factors determine the refractory industry comprehensive technical level.
In addition, the overall contracting refractory enterprises must also have a certain iron and steel enterprises to have a certain refractory product development and quality improvement of the autonomy, according to the steel enterprises in different parts of high temperature equipment, the erosion of refractory differences, relying on enterprise technology Different parts of the refractory materials used to optimize the configuration, give full play to the potential use of refractories, refractories to improve service life and reduce steel consumption of refractories. Because of its unique advantages and strong adaptability, the refractory material whole contracting mode will become an advanced mainstream business model which is unanimously recognized and widely applied by the steel industry and all high temperature industries.
Therefore, enterprises engaged in the overall contracting of refractories must change from the original manufacturer to the comprehensive service provider, and promote enterprises to pay more attention to science and technology investment, enhance innovation ability, strengthen production equipment, strict production, masonry construction and other links Quality, so that the comprehensive technical ability of enterprises to continuously upgrade and further enhance the competitiveness.
Refractory company Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick for sale, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
The future of refractory tundish castable technology will be longevity, low consumption, energy saving, environmental protection, low carbon, recycling and functional integration of the direction of research and innovation, thereby enhancing the comprehensive service capabilities, from the overall upgrading of China's international competitiveness of refractory industry , Refractory industry will also lead the development of China's special materials industry, technological revolution and rapid development.
(A) the development of energy-saving environment-friendly refractory industry
Refractory material is an important auxiliary material in the steel industry, and has wide application in the national steel industry. At present, China's annual consumption of refractories is about 10 million t, with the use of waste refractories to 400 million t, the proportion of refractory refractory refractory consumption of 45% of the total. If the recycling of refractory materials can be recycled high-grade raw materials, the use of renewable raw materials and optimize their bonding agent and additives, not only can produce high-quality unshaped refractories, but also produce high-quality shaped refractory, but also large Reducing the cost of preparation of refractories; not only saves the country's mineral resources and energy, but also reduces environmental pollution, can effectively reduce product costs and promote the overall development of the steel industry, economic and social benefits significantly.
Therefore, the refractory enterprises need to further improve the production level of all-round, and gradually the full use of clean, low-carbon environment-friendly energy, increase efforts to improve the recycling of waste refractory, waste refractory comprehensive utilization technology, Waste heat utilization technology, vigorously develop the circular economy, as far as possible to reduce the production process of waste emissions, to avoid the production of waste on the environment pollution. In addition, enterprises should speed up the elimination of production capacity inefficient production equipment, increasing the share of unshaped refractories, vigorously develop low-temperature sintering or burning and other new technologies, fundamentally improve the ability of sustainable development of refractories.
(B) the development of internationally competitive refractory industry
Competitiveness has always been the problem of all walks of life has always attached importance to, but also the fundamental survival of enterprises. The future development of China's refractory industry, will focus on the international, seeking to achieve greater development in the world and profitability. In recent years, with the continuous development of refractory industry, China's refractory production level is close to or reached the international advanced level, product cost, quality are strong international market competitiveness. Products not only by Southeast Asia, the Middle East and other developing countries of all ages, but also a large number of exports to Europe and the United States and other developed countries, and achieved good results, which also shows that China's refractories enterprises are not satisfied with the domestic marketing, Has been very far-sighted in this larger stage in the world to obtain greater profits, and also proved that China's refractory products have the strength and ability to achieve significant international development.
(C) the development of comprehensive technical level of refractory industry
Refractory material industry with comprehensive technical level not only refers to producing refractory products with good quality, environmental protection, light quality and other high-quality features, but also refers to the production of refractory matching equipment with long life, good performance, high yield and other high-quality features. Comprehensive technical level of assessment factors, involving refractory products and production equipment, such as a set of process, as well as a high level of product development, supervision and management personnel and other factors, the comprehensive evaluation of these factors determine the refractory industry comprehensive technical level.
In addition, the overall contracting refractory enterprises must also have a certain iron and steel enterprises to have a certain refractory product development and quality improvement of the autonomy, according to the steel enterprises in different parts of high temperature equipment, the erosion of refractory differences, relying on enterprise technology Different parts of the refractory materials used to optimize the configuration, give full play to the potential use of refractories, refractories to improve service life and reduce steel consumption of refractories. Because of its unique advantages and strong adaptability, the refractory material whole contracting mode will become an advanced mainstream business model which is unanimously recognized and widely applied by the steel industry and all high temperature industries.
Therefore, enterprises engaged in the overall contracting of refractories must change from the original manufacturer to the comprehensive service provider, and promote enterprises to pay more attention to science and technology investment, enhance innovation ability, strengthen production equipment, strict production, masonry construction and other links Quality, so that the comprehensive technical ability of enterprises to continuously upgrade and further enhance the competitiveness.
Refractory company Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick for sale, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
2016年10月18日星期二
Selection and Evaluation of Refractory
Selection and Evaluation of Refractory
Before the rotary kiln operating cycle is mainly refractory material operating cycle impact is relatively large, but many companies blind pursuit of high-grade refractories, resulting in tons of clinker refractory consumption is not high, but the expense of high.
Simple analysis, the kiln refractory Ladle Permeable Brick should pay attention to refractory bricks and kiln castable selection. In fact, after 14 years of production experience found that kiln castables as long as the two key indicators can be more than 1,600 degree refractoriness can be another indicator is the requirements of wear-resistant kiln refractory brick for sale more simple, The use of magnesia-chrome brick can be, behind the bold use of silicon Mo brick
Preheater castable and alkali-resistant bricks must be careful not to over-high-grade can be grate cooler high-temperature zone and low wall wear-resistant castable with high temperature can be.
Refractory company Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
Before the rotary kiln operating cycle is mainly refractory material operating cycle impact is relatively large, but many companies blind pursuit of high-grade refractories, resulting in tons of clinker refractory consumption is not high, but the expense of high.
Simple analysis, the kiln refractory Ladle Permeable Brick should pay attention to refractory bricks and kiln castable selection. In fact, after 14 years of production experience found that kiln castables as long as the two key indicators can be more than 1,600 degree refractoriness can be another indicator is the requirements of wear-resistant kiln refractory brick for sale more simple, The use of magnesia-chrome brick can be, behind the bold use of silicon Mo brick
Preheater castable and alkali-resistant bricks must be careful not to over-high-grade can be grate cooler high-temperature zone and low wall wear-resistant castable with high temperature can be.
Refractory company Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
High temperature refractory ceramic fiber paper for kiln
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Ceramic Fiber Paper |
Application: Industrial kiln wall refractory well block lining, masonry insulation layer High temperature ceramic kiln kiln lining, kiln car, door baffle, kiln furnace temperature partition board high temperature and high temperature heat insulation equipment aerospace, shipbuilding industry insulation, fire protection, clay insulating bricks - Technical features: Low thermal conductivity Low thermal capacity Excellent thermal stability and thermal shock resistance High compressive strength, and has good toughness!
Refractory company Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
2016年10月16日星期日
Talking about the Requirement of Using Refractory Material in Boiler 's Refractory Belt
The main properties of refractory material in the boiler shall include slag resistance, high strength, wear resistance, thermal stability and high thermal conductivity. The traditional fire-burning refractory material Ladle Permeable Brick mainly uses chrome ramming material. Due to the shortage of domestic high-quality chrome resources, the main use of silicon carbide ramming material, silicon carbide high aluminum coating material, high aluminum phosphate plastic, high temperature Expandable plastic.
The first two kinds of materials, the price is higher, but long life, good performance, while the latter two materials, although the price is low, but the performance in general, and short life. For this reason, it is not advisable to use high phosphate refractory ladle slide gate plastic or ramming compound in the cyclone furnace and the liquid slag discharging furnace to avoid the occurrence of peeling or cracking in use, so as to enhance the slag resistance of the material and reduce the repair frequency.
High-temperature micro-expansion of fire-resistant plastic and super-3000 fire-resistant water clay quite the same performance, used in the wall through the boiler and boiler roof to show a certain advantage. However, this material itself, a longer solidification clay insulating bricks time, prone to shrinkage cracks, which for the construction and maintenance of a lot of trouble. At the same time there is a certain quality of supply volatility, and sometimes the refractoriness and strength at room temperature less than 1580 degrees and 981N / cm2.
Refractory company Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
The first two kinds of materials, the price is higher, but long life, good performance, while the latter two materials, although the price is low, but the performance in general, and short life. For this reason, it is not advisable to use high phosphate refractory ladle slide gate plastic or ramming compound in the cyclone furnace and the liquid slag discharging furnace to avoid the occurrence of peeling or cracking in use, so as to enhance the slag resistance of the material and reduce the repair frequency.
High-temperature micro-expansion of fire-resistant plastic and super-3000 fire-resistant water clay quite the same performance, used in the wall through the boiler and boiler roof to show a certain advantage. However, this material itself, a longer solidification clay insulating bricks time, prone to shrinkage cracks, which for the construction and maintenance of a lot of trouble. At the same time there is a certain quality of supply volatility, and sometimes the refractoriness and strength at room temperature less than 1580 degrees and 981N / cm2.
Refractory company Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
2016年10月13日星期四
Effect of Refractories on Impurity of Molten Steel
Improve the quality of steel is an important indicator of lower inclusions in steel to improve the cleanliness of steel. With the improvement of cleanliness requirements of molten steel, people pay more attention to high temperature steelmaking refractory steel impurities in the impact. Steel in the various non-metallic inclusions mainly from refractory material, in the whole steelmaking alumina brick process, molten steel and refractory material firebrick refractory always keep in contact, therefore, between the two phases not only produce surface reaction can also produce erosion. Some of the inclusions in the steel in any state (in the grain boundary segregation, inclusions or precipitates, and invasive solid solution, etc.), although the trace, the organization of steel and material also has a great impact.
Analysis on the advantages of magnesium dolomite refractory material
Nowadays, low chromium or chrome-free refractory material are attracting more and more attention. Developed countries are developing chrome-free refractories to replace chromium-containing materials. Through research and production practice, magnesium dolomite refractory is AOD furnace, The ideal refractory material for large cement kiln firing zone.
Magnesium dolomite refractories silica ramming mass and Mg-Cr2O3 refractories compared to its advantages are:
1, the domestic magnesite, dolomite is rich in resources, widely distributed and inexpensive.
2, magnesium dolomite refractory CaO conducive to the purification of molten steel, smelting clean steel, magnesium dolomite refractory company also has a good dephosphorization desulfurization effect.
3, magnesium dolomite refractory castable contains a lot of free CaO, high temperature plasticity, can buffer the thermal stress caused by temperature fluctuations. Thermal shock resistance than magnesia-chrome brick.
4, in the cement kiln firing zone, magnesium dolomite materials in the f-CaO easily and clinker C2S combined into C3S, which is easy to hang kiln skin, and kiln skin and firebrick combination firm and easy to maintain.
5, the magnesium dolomite refractory ladle refractory in the use of the process or after the waste brick processing process, will not produce environmental pollution. Based on the above advantages, the development of magnesium dolomite refractories has been widespread concern. However, the CaO in magnesium dolomite refractory is easy to hydrate, which brings many inconveniences to the production, transportation and use of magnesium dolomite refractory, which limits the development of magnesium dolomite refractory.
Magnesium dolomite refractories silica ramming mass and Mg-Cr2O3 refractories compared to its advantages are:
1, the domestic magnesite, dolomite is rich in resources, widely distributed and inexpensive.
2, magnesium dolomite refractory CaO conducive to the purification of molten steel, smelting clean steel, magnesium dolomite refractory company also has a good dephosphorization desulfurization effect.
3, magnesium dolomite refractory castable contains a lot of free CaO, high temperature plasticity, can buffer the thermal stress caused by temperature fluctuations. Thermal shock resistance than magnesia-chrome brick.
4, in the cement kiln firing zone, magnesium dolomite materials in the f-CaO easily and clinker C2S combined into C3S, which is easy to hang kiln skin, and kiln skin and firebrick combination firm and easy to maintain.
5, the magnesium dolomite refractory ladle refractory in the use of the process or after the waste brick processing process, will not produce environmental pollution. Based on the above advantages, the development of magnesium dolomite refractories has been widespread concern. However, the CaO in magnesium dolomite refractory is easy to hydrate, which brings many inconveniences to the production, transportation and use of magnesium dolomite refractory, which limits the development of magnesium dolomite refractory.
2016年10月11日星期二
Influence of continuous casting refractories on pure steel and its development
In recent years, the performance requirements of steel is getting higher and higher. The higher the cleanliness of steel, alumina brick the better the performance. Steel impurity content reaches a certain level, the performance of steel will be a qualitative change. Steel oxygen, sulfur, phosphorus, hydrogen, nitrogen content of the five elements should be as low as possible. At present, the sum of the harmful elements coil grout [C, S, P, N, H, TO] in clean steel (IF steel and pipeline steel, etc.) produced at home and abroad advanced process can be controlled below 100 × 10-6, Some scholars have proposed the concept of ultra-clean steel, and defined as inclusions [C, S, P, N, H, TO] and the sum of 40 × 10-6 the following. Clean steel production is inseparable from the hot metal pretreatment, converter decarburization, refining and other secondary refining process optimization and control, and is also closely related to the use of refractory material, refined molten steel is likely to be continuous casting refractory pollution, Oxygen, nitrogen, hydrogen and other elements, so in the production of clean steel, refractory used in the study and reasonable choice is very important.
Continuous casting refractories Ladle Permeable Brick in clean steel production of molten steel in the carbon, nitrogen has a significant impact, the correct selection can be adsorbed molten steel sulfur, phosphorus inclusions, the purification of molten steel. In the production of clean steel should be selected alkaline, especially calcium refractories ladle slide gate, should adopt carbon-free, silicon-free or low-carbon low-silicon material. Metallurgical workers and the future direction of research refractories, refractories are continuous casting with functional, longevity and environmental protection.
Continuous casting refractories Ladle Permeable Brick in clean steel production of molten steel in the carbon, nitrogen has a significant impact, the correct selection can be adsorbed molten steel sulfur, phosphorus inclusions, the purification of molten steel. In the production of clean steel should be selected alkaline, especially calcium refractories ladle slide gate, should adopt carbon-free, silicon-free or low-carbon low-silicon material. Metallurgical workers and the future direction of research refractories, refractories are continuous casting with functional, longevity and environmental protection.
2016年10月10日星期一
Iron and steel enterprises on the energy-saving emission reduction refractory material high demand
With the development of iron and steel industry, iron and steel enterprises are also increasing the requirements of refractory company: the requirements of a longer service life and cleaner liquid steel.
In recent years, some domestic refractories suppliers to take refractory contracting system, the refractory supply, construction and maintenance to the contractor responsible for the price per tonne of steel to settle. This can mobilize the enthusiasm of refractory suppliers, to reduce consumption and its economic benefits linked to, but also effectively improve the user's economic environment, will help accelerate the reduction of China's metallurgical refractories consumption. To complete the consumption from the previous more the more the more profitable consumption to the less profitable transformation of the contracting model is not only a change in management mode, more importantly, technical upgrading, especially the application of technology to enhance the use of refractory The material is adapted to the operating conditions as far as possible. The use of refractory brick for sale technology in China is relatively backward, at the same time, the lack of refractory material suppliers use experience.
Recently, an iron and steel enterprises through a series of measures to make it 60 tons of LF ladle service life from the original 40 times to 50 times extended to 88 times, refractory unit consumption from 9.3 kg per ton steel down 5.6 kg per tonne, with remarkable results . We summarize their experience as follows. The EAF tapping temperature is generally 1620 ℃ ~ 1650 ℃. Normal ladle temperature of 1590 ℃ ~ 1620 ℃, ladle capacity of about 59 tons. Ladle refining time of 40 minutes to 50 minutes, a total of about 110 minutes of steel time. Argon pressure 0.2 MPa ~ 0.4 MPa, LF refining ratio of 100%, generally each furnace plus deoxidizer SiC 40 kg to 50 kg. The chemical composition of the ladle slag is: Fe2O31.44%, Al2O35.6%, CaO40.42%, CaF29%, MgO9.97%, SiO229.84%. This indicates that the ladle slag is a low basicity slag containing fluorite. The amount of slag in the electric furnace is large, and the oxidization of the slag is strong at the end of the electric furnace, and the content of FeO is always 45%.
Before the improvement, the iron and steel enterprises 60 tons of LF ladle slag line was used MT-14A magnesium carbon brick, pool with AMC brick. It is possible to use the physical and chemical properties of such bricks. In particular, the slag line, the use of magnesia carbon brick has a good density. The use of slag magnesia carbon brick is: the first slag line brick to use 15 to 19 times, the slag has been eroded to 50 mm below. In this case, the ladle will be off the assembly line, replace the ladle slag line brick. The second slag line of magnesium carbon brick service life of only about 15 times, and then again replace the third slag line of magnesium carbon brick, its service life can only reach 12 to 14 times, the total life of three slag only 40 times ~ 50 times, or even only to about 40 furnace times. The researchers observed the surface morphology of the ladle after use, found that the brick erosion uniformity, no increase in the phenomenon of brick, bricks did not appear like buns, guns, peeling and fracture anomalies, slag erosion rate of 7 mm ~ 10 mm, wall erosion rate also reached each 2.5 mm ~ 3.5 mm. Therefore, the main reason for the service life of the ladle is the rapid erosion of the slag line.
The main reason for this ladle erosion is that the basicity of slag is low, the lower the ratio of CaO and SiO2 is, the more the slag dissolves MgO, that is, the stronger the dissolving ability of slag to MgO. The low basicity slag on the corrosion of magnesium carbon brick is more serious. According to the analysis, they have taken the method of increasing the content of CaO in the brick so as to increase the ratio of CaO and SiO2 in the system after contact with slag and improve the melting point and viscosity of the system after slag reaction, so as to reduce the erosion speed. .
Because the amount of slag during the electric furnace tapping large, and the final oxidation of the furnace slag strong, which led to the early ladle slag has a high FeO content, resulting in magnesium carbon brick in the carbon easily oxidized, thus speeding up the slag line magnesium carbon Brick damage rate. According to this situation, the oxidation resistance of slag MgO-C brick needs more attention. After the modified slag MgO-C bricks at 1000 ℃ after 3 hours of oxidation resistance test, the oxidation decarburization layer is only 1 mm, while the improved MT-14A slag MgO-C brick oxidized decarburization layer thickness of 5 mm to 7 mm . Therefore, the modified slag MgO-C brick has good oxidation resistance.
In the steelmaking process, 50 to 60 kg of fluorite is added to each steel, which reduces the slag viscosity because the depth of penetration of the slag is inversely proportional to the square root of the viscosity. At the same time, it also accelerated the slag penetration of refractory materials, and lead to the slag line of magnesia carbon brick oxidation and erosion significantly improved. Therefore, the design of the production of magnesium carbon bricks, should be selected to improve the viscosity of fluorite-containing slag additives, which is conducive to improving the anti-slag erosion, but also conducive to extend the life of ladle.
As the common technology of MgO-C brick, it can improve the density of the product, the crystallinity and the purity of the raw material can significantly improve the corrosion resistance of MgO-C brick. For increased performance, large crystalline high purity fused magnesia, high purity natural graphite, and appropriate antioxidants and enhancers should be used. However, taking into account the economic efficiency of enterprises in the selection of materials should pay special attention to price. The enterprise to meet the basic requirements of the life of the case, the use of a certain amount of post-use magnesium-carbon brick renewable materials, and the use of some low-cost MP binding agent. For the regeneration of magnesium carbon materials, fewer fake particles and impurities, the more can improve the use of recycled magnesium carbon brick effect. Therefore, as far as possible the regeneration of magnesium carbon brick material removal, removal of fake particles, in order to improve the quality of recycled magnesium carbon bricks. MP binder is an asphalt modified resin binder, its residual carbon has a certain graphitization structure, with high oxidation resistance, thermal bonding properties and thermal shock resistance. Therefore, the choice of both antioxidant and enhance the role of composite additives, will help improve the performance of magnesium-carbon brick.
Based on the principle of optimal cost performance, the enterprise adopts the high quality recycled magnesium carbon material as the main raw material, with the appropriate content of 97% MgO fused magnesia, a small amount of -195 grades of graphite, composite Additives and modified resin binder, the ingredients, in the 630 tons of friction press molding, after curing system in the regeneration of magnesium carbon brick. Recycled Mg-C brick has good physical and chemical indexes, which fully meets the requirements of the national MT-12A and MT-14A quality products.
The improved MgO-C brick was applied to 60 tons of LF ladle, showing excellent corrosion resistance, oxidation resistance and thermal shock resistance. Ladle slag life from the use of MT-14A before the improvement of the Mg-C brick 15 to 19 times increased to 24 to 28 times, the erosion rate from 7 mm to 10 mm each time to 4.5 mm to 6.8 mm; From 40 to 50 times to 45 to 55 times, the erosion rate from 2.5 mm to 3.5 mm each time to reduce to 1.2 mm to 2.4 mm each. The application of this product, reducing the maintenance of ladle, get a good user evaluation.
Slag leaving slag operation: Because the final slag FeO content, not only affect the raw material yield, increased steelmaking costs, but also led to the refinement of ladle lining shorten the service life. By adjusting the oxygen gun, the angle and depth of the carbon gun, and strengthen the latter part of the electric furnace carbon spray, improve the foam slag and other methods to reduce the slag FeO content and reduce the slag in the oxygen activity, so that slag separation to reduce the amount of slag. Practice has proved that by controlling the amount of slag and slag in the FeO content, the life of refined ladle extended from 50 to 60 times, the life of refined ladle extended by 20%.
Add slag modifier: steel with SiC deoxidizer, with the electric furnace slag and slag FeO content increased, according to the deoxidation reaction: SiC +4 FeO = 4Fe + SiO2 + CO2 need more SiC deoxidizer, not only lead to refining The cost of steel increases, and the ratio of CaO and SiO2 in ladle slag is reduced, which greatly accelerates the erosion of lining. In order to reduce the ladle slag erosion of the lining, deoxidizer without SiC quality, and carbon content of 15% of the calcium and magnesium carbon steel ladle modifier, the addition of silicon carbide deoxidizing agent is basically the same, that is, per ton of steel by adding 1 kilogram. CaO in the modifier improves the basicity of the ladle slag, so that the MgO carbon brick in the erosion of MgO weakened low, MgO in the modifier MgO can increase the concentration of slag, magnesium and carbon brick to reduce MgO Of the dissolution rate. Through the trial of Mg-Ca carbonaceous modifier, the one-time service life of slag line MgO-C brick was extended from 26 times to 30 times, 15% longer.
Improve the maintenance system: slag erosion fast, the beginning of the two slag line corresponds to a molten pool. Later, with the two high aluminum brick on the pool were subsidized, that is, with the thickness of 40 mm of the two high aluminum brick attached to the molten pool, paste between the brick and the original lining with plastic binder and packing. The service life of molten pool from 60 to 88, extended by more than 45%.
In recent years, some domestic refractories suppliers to take refractory contracting system, the refractory supply, construction and maintenance to the contractor responsible for the price per tonne of steel to settle. This can mobilize the enthusiasm of refractory suppliers, to reduce consumption and its economic benefits linked to, but also effectively improve the user's economic environment, will help accelerate the reduction of China's metallurgical refractories consumption. To complete the consumption from the previous more the more the more profitable consumption to the less profitable transformation of the contracting model is not only a change in management mode, more importantly, technical upgrading, especially the application of technology to enhance the use of refractory The material is adapted to the operating conditions as far as possible. The use of refractory brick for sale technology in China is relatively backward, at the same time, the lack of refractory material suppliers use experience.
Recently, an iron and steel enterprises through a series of measures to make it 60 tons of LF ladle service life from the original 40 times to 50 times extended to 88 times, refractory unit consumption from 9.3 kg per ton steel down 5.6 kg per tonne, with remarkable results . We summarize their experience as follows. The EAF tapping temperature is generally 1620 ℃ ~ 1650 ℃. Normal ladle temperature of 1590 ℃ ~ 1620 ℃, ladle capacity of about 59 tons. Ladle refining time of 40 minutes to 50 minutes, a total of about 110 minutes of steel time. Argon pressure 0.2 MPa ~ 0.4 MPa, LF refining ratio of 100%, generally each furnace plus deoxidizer SiC 40 kg to 50 kg. The chemical composition of the ladle slag is: Fe2O31.44%, Al2O35.6%, CaO40.42%, CaF29%, MgO9.97%, SiO229.84%. This indicates that the ladle slag is a low basicity slag containing fluorite. The amount of slag in the electric furnace is large, and the oxidization of the slag is strong at the end of the electric furnace, and the content of FeO is always 45%.
Before the improvement, the iron and steel enterprises 60 tons of LF ladle slag line was used MT-14A magnesium carbon brick, pool with AMC brick. It is possible to use the physical and chemical properties of such bricks. In particular, the slag line, the use of magnesia carbon brick has a good density. The use of slag magnesia carbon brick is: the first slag line brick to use 15 to 19 times, the slag has been eroded to 50 mm below. In this case, the ladle will be off the assembly line, replace the ladle slag line brick. The second slag line of magnesium carbon brick service life of only about 15 times, and then again replace the third slag line of magnesium carbon brick, its service life can only reach 12 to 14 times, the total life of three slag only 40 times ~ 50 times, or even only to about 40 furnace times. The researchers observed the surface morphology of the ladle after use, found that the brick erosion uniformity, no increase in the phenomenon of brick, bricks did not appear like buns, guns, peeling and fracture anomalies, slag erosion rate of 7 mm ~ 10 mm, wall erosion rate also reached each 2.5 mm ~ 3.5 mm. Therefore, the main reason for the service life of the ladle is the rapid erosion of the slag line.
The main reason for this ladle erosion is that the basicity of slag is low, the lower the ratio of CaO and SiO2 is, the more the slag dissolves MgO, that is, the stronger the dissolving ability of slag to MgO. The low basicity slag on the corrosion of magnesium carbon brick is more serious. According to the analysis, they have taken the method of increasing the content of CaO in the brick so as to increase the ratio of CaO and SiO2 in the system after contact with slag and improve the melting point and viscosity of the system after slag reaction, so as to reduce the erosion speed. .
Because the amount of slag during the electric furnace tapping large, and the final oxidation of the furnace slag strong, which led to the early ladle slag has a high FeO content, resulting in magnesium carbon brick in the carbon easily oxidized, thus speeding up the slag line magnesium carbon Brick damage rate. According to this situation, the oxidation resistance of slag MgO-C brick needs more attention. After the modified slag MgO-C bricks at 1000 ℃ after 3 hours of oxidation resistance test, the oxidation decarburization layer is only 1 mm, while the improved MT-14A slag MgO-C brick oxidized decarburization layer thickness of 5 mm to 7 mm . Therefore, the modified slag MgO-C brick has good oxidation resistance.
In the steelmaking process, 50 to 60 kg of fluorite is added to each steel, which reduces the slag viscosity because the depth of penetration of the slag is inversely proportional to the square root of the viscosity. At the same time, it also accelerated the slag penetration of refractory materials, and lead to the slag line of magnesia carbon brick oxidation and erosion significantly improved. Therefore, the design of the production of magnesium carbon bricks, should be selected to improve the viscosity of fluorite-containing slag additives, which is conducive to improving the anti-slag erosion, but also conducive to extend the life of ladle.
As the common technology of MgO-C brick, it can improve the density of the product, the crystallinity and the purity of the raw material can significantly improve the corrosion resistance of MgO-C brick. For increased performance, large crystalline high purity fused magnesia, high purity natural graphite, and appropriate antioxidants and enhancers should be used. However, taking into account the economic efficiency of enterprises in the selection of materials should pay special attention to price. The enterprise to meet the basic requirements of the life of the case, the use of a certain amount of post-use magnesium-carbon brick renewable materials, and the use of some low-cost MP binding agent. For the regeneration of magnesium carbon materials, fewer fake particles and impurities, the more can improve the use of recycled magnesium carbon brick effect. Therefore, as far as possible the regeneration of magnesium carbon brick material removal, removal of fake particles, in order to improve the quality of recycled magnesium carbon bricks. MP binder is an asphalt modified resin binder, its residual carbon has a certain graphitization structure, with high oxidation resistance, thermal bonding properties and thermal shock resistance. Therefore, the choice of both antioxidant and enhance the role of composite additives, will help improve the performance of magnesium-carbon brick.
Based on the principle of optimal cost performance, the enterprise adopts the high quality recycled magnesium carbon material as the main raw material, with the appropriate content of 97% MgO fused magnesia, a small amount of -195 grades of graphite, composite Additives and modified resin binder, the ingredients, in the 630 tons of friction press molding, after curing system in the regeneration of magnesium carbon brick. Recycled Mg-C brick has good physical and chemical indexes, which fully meets the requirements of the national MT-12A and MT-14A quality products.
The improved MgO-C brick was applied to 60 tons of LF ladle, showing excellent corrosion resistance, oxidation resistance and thermal shock resistance. Ladle slag life from the use of MT-14A before the improvement of the Mg-C brick 15 to 19 times increased to 24 to 28 times, the erosion rate from 7 mm to 10 mm each time to 4.5 mm to 6.8 mm; From 40 to 50 times to 45 to 55 times, the erosion rate from 2.5 mm to 3.5 mm each time to reduce to 1.2 mm to 2.4 mm each. The application of this product, reducing the maintenance of ladle, get a good user evaluation.
Slag leaving slag operation: Because the final slag FeO content, not only affect the raw material yield, increased steelmaking costs, but also led to the refinement of ladle lining shorten the service life. By adjusting the oxygen gun, the angle and depth of the carbon gun, and strengthen the latter part of the electric furnace carbon spray, improve the foam slag and other methods to reduce the slag FeO content and reduce the slag in the oxygen activity, so that slag separation to reduce the amount of slag. Practice has proved that by controlling the amount of slag and slag in the FeO content, the life of refined ladle extended from 50 to 60 times, the life of refined ladle extended by 20%.
Add slag modifier: steel with SiC deoxidizer, with the electric furnace slag and slag FeO content increased, according to the deoxidation reaction: SiC +4 FeO = 4Fe + SiO2 + CO2 need more SiC deoxidizer, not only lead to refining The cost of steel increases, and the ratio of CaO and SiO2 in ladle slag is reduced, which greatly accelerates the erosion of lining. In order to reduce the ladle slag erosion of the lining, deoxidizer without SiC quality, and carbon content of 15% of the calcium and magnesium carbon steel ladle modifier, the addition of silicon carbide deoxidizing agent is basically the same, that is, per ton of steel by adding 1 kilogram. CaO in the modifier improves the basicity of the ladle slag, so that the MgO carbon brick in the erosion of MgO weakened low, MgO in the modifier MgO can increase the concentration of slag, magnesium and carbon brick to reduce MgO Of the dissolution rate. Through the trial of Mg-Ca carbonaceous modifier, the one-time service life of slag line MgO-C brick was extended from 26 times to 30 times, 15% longer.
Improve the maintenance system: slag erosion fast, the beginning of the two slag line corresponds to a molten pool. Later, with the two high aluminum brick on the pool were subsidized, that is, with the thickness of 40 mm of the two high aluminum brick attached to the molten pool, paste between the brick and the original lining with plastic binder and packing. The service life of molten pool from 60 to 88, extended by more than 45%.
Refractories How to better serve the aluminum smelting industry
refractory material from the combination of high-alumina phosphate refractory brick to the direction of development of low-cement castable. This new material gradually replaced the traditional phosphate-bonded brick and low cement castable.
In order to prevent the infiltration of liquid aluminum into the refractory, often use anti-wetting agent to increase the liquid aluminum and refractory material between the wetting angle, while extending the refractories life at high temperatures. For aluminum and aluminum alloy melting furnace and holding furnace refractory heating surface, the low-cement castable has replaced the phosphate-bonded high alumina brick. The reasons are as follows: in the low cement castable structure, there is a smaller pore size, liquid aluminum and aluminum alloy is more difficult to penetrate into the refractory, refractory oxide can be avoided by Ladle Permeable Brick aluminum reduction, while low cement castable Has excellent wear resistance. In recent years, low cement castable due to the use of liquid aluminum as an additive to increase the wetting angle, so its performance has improved.
In order to prevent the infiltration of liquid aluminum into the refractory, often use anti-wetting agent to increase the liquid aluminum and refractory material between the wetting angle, while extending the refractories life at high temperatures. For aluminum and aluminum alloy melting furnace and holding furnace refractory heating surface, the low-cement castable has replaced the phosphate-bonded high alumina brick. The reasons are as follows: in the low cement castable structure, there is a smaller pore size, liquid aluminum and aluminum alloy is more difficult to penetrate into the refractory, refractory oxide can be avoided by Ladle Permeable Brick aluminum reduction, while low cement castable Has excellent wear resistance. In recent years, low cement castable due to the use of liquid aluminum as an additive to increase the wetting angle, so its performance has improved.
2016年10月9日星期日
Correct Selection of Refractory material for Hot Air Furnace
Hot blast stove is the key to the relationship between the blast furnace system, hot blast furnace furnace life of the generation of the age has an important impact, to improve the life of hot stove, refractory brick and refractory mud should be selected in addition to good refractory Quench , Masonry should also have a good overall structural strength, so that the sealing is good, good insulation.
According to the temperature inside the furnace, the refractory material lining is low cement high-aluminum heat-resisting material, and the refractory lining thickness is determined according to the heat transfer calculation, and the outer surface temperature of the hot-blast stove should not be higher than 60 DEG C under the ambient temperature. The refractory lining material of hot blast stove must have factory certificate and pass the inspection of third party authority.
Refractory brick used for blast furnace in the hot blast furnace selection it is necessary to consider life expectancy, but also consider the cost. In the hot stove in the lower part of the clay brick and high alumina brick. In the upper part of the hot stove, high temperature is adopted, and silica brick is used. refractories mud selection and brick with a matching chemical composition, high temperature performance of the corresponding higher grades. In the furnace shell and insulation lining choice spray coating material as a protective layer, to avoid the furnace of harmful components of the erosion of the shell, the specific choice may be based on the actual situation.
According to the temperature inside the furnace, the refractory material lining is low cement high-aluminum heat-resisting material, and the refractory lining thickness is determined according to the heat transfer calculation, and the outer surface temperature of the hot-blast stove should not be higher than 60 DEG C under the ambient temperature. The refractory lining material of hot blast stove must have factory certificate and pass the inspection of third party authority.
Refractory brick used for blast furnace in the hot blast furnace selection it is necessary to consider life expectancy, but also consider the cost. In the hot stove in the lower part of the clay brick and high alumina brick. In the upper part of the hot stove, high temperature is adopted, and silica brick is used. refractories mud selection and brick with a matching chemical composition, high temperature performance of the corresponding higher grades. In the furnace shell and insulation lining choice spray coating material as a protective layer, to avoid the furnace of harmful components of the erosion of the shell, the specific choice may be based on the actual situation.
2016年10月8日星期六
Selection Method of Refractory Lining for Different Parts of Blast Furnace
In the production process, the refractory lining of the furnace wall by a variety of role and gradually be eroded, so the choice of the various parts of the refractory brick lining should follow the principle is: refractory lining lining with the part of the heat flow intensity corresponds to, To keep the brick under the impact of strong heat flow
Lining to maintain integrity and stability; refractory lining with the part of the erosion mechanism should be corresponding to ease and delay the lining damage rate, to extend the life of blast furnace; try to use the price / performance than the low refractory, the choice of price Relatively low performance and good resistance
Firebrick, should not blindly choose expensive high-grade refractories. Each part of the firebrick lining selection method is:
(1) furnace throat. Mainly into the charge of the impact and wear, the general selection of steel or water-cooled steel bricks.
(2) the upper part of the furnace. This area is prone to carbon deposition reaction area, and alkali metal, zinc vapor erosion is also occurring in the region, together with the decline in charge and rising gas flow erosion and wear, it should be used to resist chemical erosion and abrasion resistance Of the refractory material
Material, the most suitable high-density clay brick, high-density third-class high-alumina brick or phosphoric acid-impregnated clay brick. Modern large-scale blast furnace on the use of thin-walled structure, the commonly used 1 to 3-stage buckle instead of brick wall lining.
(3) in the lower body and furnace waist. The main mechanism of damage is thermal shock, high temperature gas scour, alkaline metal, zinc and carbon analysis, as well as the initial chemical erosion of slag. Brick lining should be used for thermal shock resistance, resistance to early slag erosion and erosion of refractory castable Now at home and abroad
Large blast furnace selection of good performance but expensive silicon carbide brick (silicon nitride combination, self-bonding, combination of SIAL), so that the life of more than 8 years. Practice has proved that even the best refractory used for Blast Furnace is to be eroded, to balance (probably erosion to the original thickness of half
) Can be stable, this time is about 3 years. In fact, the use of good performance of fired aluminum carbon brick (much cheaper), can achieve this goal. So 10003 and below the blast furnace can be used aluminum carbon brick.
(4) furnace belly. The main reason for the damage is the scouring of high temperature gas and the scouring of slag iron. The heat flux of this part is very strong. Any refractories can not be resisted for a long time, mainly in slag skin, so this part need not be selected.
Too expensive refractories. This part of refractory company life is not long (1-2 months is long, short is 2-3 weeks), the general selection of high refractoriness, load softening temperature and high bulk density refractories, such as high alumina brick, aluminum carbon brick Wait.
(5) hearth tuyere area. This site is the only area of the blast furnace oxidation reaction, the resulting high temperature up to 1900 ~ 2400), brick lining by high temperature caused by the destruction of thermal stress, and high temperature gas scouring, slag erosion, alkali metal erosion, cyclic movement coke
Of the erosion and so on. Modern blast furnace are combined brick masonry tuyere area, made of high aluminum, corundum mullite, corundum and silicon nitride silicon carbide, etc., but also useful for hot-pressed carbon block.
(6) hearth bottom and bottom. Blast furnace lining erosion of serious areas, the degree of erosion has always been to determine the basis for the generation of blast furnace life. The early bottom of the furnace because no cooling, mostly using a single ceramic refractories, thermal stress so that masonry cracks, hot metal
Penetration into the seam leaving the furnace floor brick is the main reason for the damage. The use of good bottom structure (ceramic cups, staggered bite, etc.) and cooling, as well as the use of high quality corundum, gray corundum bricks and carbon microporous, hot pressed bricks, greatly prolongs the blast furnace bottom life. but
Is the molten iron on the carbon brick osmotic corrosion, chemical corrosion of alkali bricks on the carbon brick, thermal stress on the destruction of carbon brick, C02 and H20 on the oxidation of carbon brick is still a threat to the hearth, furnace life important factors, and iron The circulation of the molten iron at the time of the movement on the cylinder liner lining the circumference of the machinery
Scouring and erosion are the primary factors of hearth damage.
This part of the refractory using high thermal conductivity, high permeability, high chemical resistance, low porosity, small pore size hot-pressed small carbon bricks, microporous carbon brick, carbon brick and hot-pressed semi-graphite used in ceramics Cups of corundum or gray corundum bricks. In a very long period of time
Time, small and medium-sized blast furnace using electric calcination anthracite made of high quality self-baking carbon block also achieved very good results. But changed to ceramic cup structure, you should not use self-baking carbon block, and use a roasted carbon block. Because the ceramic cup structure on the high-alumina refractory insulation
Self-baking carbon brick loss of self-baking conditions, can not make self-baking carbon brick to form a whole, so there have been several production burnout accident (North Taiwan, etc.).
Tiekou District, poor working conditions, and now the furnace with refractories matched the combination of iron brick masonry, the production of carbon, semi-graphite, mullite and so on.
Lining to maintain integrity and stability; refractory lining with the part of the erosion mechanism should be corresponding to ease and delay the lining damage rate, to extend the life of blast furnace; try to use the price / performance than the low refractory, the choice of price Relatively low performance and good resistance
Firebrick, should not blindly choose expensive high-grade refractories. Each part of the firebrick lining selection method is:
(1) furnace throat. Mainly into the charge of the impact and wear, the general selection of steel or water-cooled steel bricks.
(2) the upper part of the furnace. This area is prone to carbon deposition reaction area, and alkali metal, zinc vapor erosion is also occurring in the region, together with the decline in charge and rising gas flow erosion and wear, it should be used to resist chemical erosion and abrasion resistance Of the refractory material
Material, the most suitable high-density clay brick, high-density third-class high-alumina brick or phosphoric acid-impregnated clay brick. Modern large-scale blast furnace on the use of thin-walled structure, the commonly used 1 to 3-stage buckle instead of brick wall lining.
(3) in the lower body and furnace waist. The main mechanism of damage is thermal shock, high temperature gas scour, alkaline metal, zinc and carbon analysis, as well as the initial chemical erosion of slag. Brick lining should be used for thermal shock resistance, resistance to early slag erosion and erosion of refractory castable Now at home and abroad
Large blast furnace selection of good performance but expensive silicon carbide brick (silicon nitride combination, self-bonding, combination of SIAL), so that the life of more than 8 years. Practice has proved that even the best refractory used for Blast Furnace is to be eroded, to balance (probably erosion to the original thickness of half
) Can be stable, this time is about 3 years. In fact, the use of good performance of fired aluminum carbon brick (much cheaper), can achieve this goal. So 10003 and below the blast furnace can be used aluminum carbon brick.
(4) furnace belly. The main reason for the damage is the scouring of high temperature gas and the scouring of slag iron. The heat flux of this part is very strong. Any refractories can not be resisted for a long time, mainly in slag skin, so this part need not be selected.
Too expensive refractories. This part of refractory company life is not long (1-2 months is long, short is 2-3 weeks), the general selection of high refractoriness, load softening temperature and high bulk density refractories, such as high alumina brick, aluminum carbon brick Wait.
(5) hearth tuyere area. This site is the only area of the blast furnace oxidation reaction, the resulting high temperature up to 1900 ~ 2400), brick lining by high temperature caused by the destruction of thermal stress, and high temperature gas scouring, slag erosion, alkali metal erosion, cyclic movement coke
Of the erosion and so on. Modern blast furnace are combined brick masonry tuyere area, made of high aluminum, corundum mullite, corundum and silicon nitride silicon carbide, etc., but also useful for hot-pressed carbon block.
(6) hearth bottom and bottom. Blast furnace lining erosion of serious areas, the degree of erosion has always been to determine the basis for the generation of blast furnace life. The early bottom of the furnace because no cooling, mostly using a single ceramic refractories, thermal stress so that masonry cracks, hot metal
Penetration into the seam leaving the furnace floor brick is the main reason for the damage. The use of good bottom structure (ceramic cups, staggered bite, etc.) and cooling, as well as the use of high quality corundum, gray corundum bricks and carbon microporous, hot pressed bricks, greatly prolongs the blast furnace bottom life. but
Is the molten iron on the carbon brick osmotic corrosion, chemical corrosion of alkali bricks on the carbon brick, thermal stress on the destruction of carbon brick, C02 and H20 on the oxidation of carbon brick is still a threat to the hearth, furnace life important factors, and iron The circulation of the molten iron at the time of the movement on the cylinder liner lining the circumference of the machinery
Scouring and erosion are the primary factors of hearth damage.
This part of the refractory using high thermal conductivity, high permeability, high chemical resistance, low porosity, small pore size hot-pressed small carbon bricks, microporous carbon brick, carbon brick and hot-pressed semi-graphite used in ceramics Cups of corundum or gray corundum bricks. In a very long period of time
Time, small and medium-sized blast furnace using electric calcination anthracite made of high quality self-baking carbon block also achieved very good results. But changed to ceramic cup structure, you should not use self-baking carbon block, and use a roasted carbon block. Because the ceramic cup structure on the high-alumina refractory insulation
Self-baking carbon brick loss of self-baking conditions, can not make self-baking carbon brick to form a whole, so there have been several production burnout accident (North Taiwan, etc.).
Tiekou District, poor working conditions, and now the furnace with refractories matched the combination of iron brick masonry, the production of carbon, semi-graphite, mullite and so on.
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