A heat-resistant steel fiber of a certain size is added to a castable refractories in a mixture consisting of a refractory material aggregate, a binder and an admixture to become
a steel fiber reinforced refractory castable. Compared with castables without heat-resistant steel fireclay refractories, the castable has the following characteristics:
1, can inhibit castable in the curing, baking and high temperature use in the contraction;
2, to improve the toughness of castable, anti-mechanical impact and mechanical strength;
3, to improve the thermal shock resistance of castable;
4, to prevent the cast material generated within the micro-cracks in the thermal stress and mechanical stress under the expansion or extension caused by the occurrence of fracture or peeling.
2016年11月16日星期三
2016年11月7日星期一
New requirements of second generation dry process cement for refractory
China's cement industry developed rapidly, the output from the early liberation of the development of 620,000 t in 2015 to 2.35 billion t, from 1985 onwards 31 consecutive years of production and consumption ranked first in the world, the new dry cement production technology and equipment level Has been close to the international advanced level, localization of equipment has been fully meet the needs of the cement industry. However, excess capacity of cement clinker in China, cement companies operating efficiency and low efficiency. Energy saving, reduce costs as a cement enterprise to enhance the economic benefits of the inevitable. China Building Materials Federation first proposed the cement industry should vigorously develop the "second-generation new dry cement technology", its purpose is to reduce the energy consumption of cement production and enhance business efficiency. refractory material as an indispensable lining process of cement sintering material, is the second generation of new dry process cement material support conditions. The second generation of new dry cement technology on the refractory materials put forward new requirements, and refractory configuration technology should also be compatible with.
Cement industry, the initial requirements of refractories materials to meet the protection of the metal shell of a single function; and the development of the second generation of new dry cement technology, requiring refractories with energy saving, green, longevity efficient, safe and stable and other functions .
Energy saving
The second generation of dry cement technology in the cement clinker heat consumption standards for the 650 cal kg-1, and a large part of the calcination process of cement heat through the thermal radiation of the equipment surface dissipation. Therefore, the refractory company material as the basis of all high-temperature equipment lining material, should not only have good performance, but also should take into account the energy-saving insulation properties.
Green
The chromium content in the cement shall not be greater than 10.00 mg kg-1. According to statistics, the water-soluble chromium (Ⅵ) in cement mainly comes from the fuel and raw materials of cement raw materials, crushing and grinding media, refractory materials (magnesia-chrome bricks) and chromium-containing wastes. For most cement companies, refractory high insulating brick (magnesia-chrome brick) is the most important source of water-soluble chromium (Ⅵ). Magnesia-chrome bricks because of good thermal shock resistance, high temperature resistance and hanging kiln skin capacity, is still the majority of domestic cement rotary kiln for the use of high-temperature zone. According to statistics, the domestic cement enterprises average per ton of cement clinker consumption of high-temperature zone with alkaline refractories of about 244 g, assuming that half of the bricks into soluble chromium (Ⅵ) and into the cement clinker, the cement clinker Soluble chromium (Ⅵ) content will reach 10.98mg kg-1. Therefore, in the cement industry to eliminate the use of magnesia-chrome brick has been in the industry consensus, the major domestic basic refractories enterprises have developed alternative to magnesia-chrome brick refractory products used in high-quality, and in the country has been rapidly applied.
Longevity and high efficiency
New dry cement technology continues to move in the direction of large-scale development, the current Nissan 5000t and above cement clinker production line has become the minimum requirements of new projects of cement companies, Nissan 10000t or 1200t cement clinker production line in China has reached more than 10 articles. Large-scale cement production line requires the quality and stability of refractories alumina brick should be a corresponding substantial increase in long-life, high-performance refractories in the country to promote rapidly, the current domestic cement production line refractories have been slowly from the "overhaul a year "To" three years of two overhaul, "the goal of development.
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.
Cement industry, the initial requirements of refractories materials to meet the protection of the metal shell of a single function; and the development of the second generation of new dry cement technology, requiring refractories with energy saving, green, longevity efficient, safe and stable and other functions .
Energy saving
The second generation of dry cement technology in the cement clinker heat consumption standards for the 650 cal kg-1, and a large part of the calcination process of cement heat through the thermal radiation of the equipment surface dissipation. Therefore, the refractory company material as the basis of all high-temperature equipment lining material, should not only have good performance, but also should take into account the energy-saving insulation properties.
Green
The chromium content in the cement shall not be greater than 10.00 mg kg-1. According to statistics, the water-soluble chromium (Ⅵ) in cement mainly comes from the fuel and raw materials of cement raw materials, crushing and grinding media, refractory materials (magnesia-chrome bricks) and chromium-containing wastes. For most cement companies, refractory high insulating brick (magnesia-chrome brick) is the most important source of water-soluble chromium (Ⅵ). Magnesia-chrome bricks because of good thermal shock resistance, high temperature resistance and hanging kiln skin capacity, is still the majority of domestic cement rotary kiln for the use of high-temperature zone. According to statistics, the domestic cement enterprises average per ton of cement clinker consumption of high-temperature zone with alkaline refractories of about 244 g, assuming that half of the bricks into soluble chromium (Ⅵ) and into the cement clinker, the cement clinker Soluble chromium (Ⅵ) content will reach 10.98mg kg-1. Therefore, in the cement industry to eliminate the use of magnesia-chrome brick has been in the industry consensus, the major domestic basic refractories enterprises have developed alternative to magnesia-chrome brick refractory products used in high-quality, and in the country has been rapidly applied.
Longevity and high efficiency
New dry cement technology continues to move in the direction of large-scale development, the current Nissan 5000t and above cement clinker production line has become the minimum requirements of new projects of cement companies, Nissan 10000t or 1200t cement clinker production line in China has reached more than 10 articles. Large-scale cement production line requires the quality and stability of refractories alumina brick should be a corresponding substantial increase in long-life, high-performance refractories in the country to promote rapidly, the current domestic cement production line refractories have been slowly from the "overhaul a year "To" three years of two overhaul, "the goal of development.
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11月4日星期五
Basic information on fire - resistant aluminum silicate cotton for industrial furnaces
First, the industrial furnace fire-resistant high insulating brick with fire-resistant cotton is the corresponding fire-resistant material 20mm thick needle-punched blankets made by finishing, size neat, in full compliance with national standards, strict control of the plastic tube in the middle, acupuncture blanket thickness Uniform, all for the fine acupuncture blanket, unlike some enterprises in the middle of the module doping dross blankets, blankets, acupuncture blanket alumina brick slag ball content is low, low degree of hand, used to do all the pre-acupuncture blanket blanket, And there are loading tools to ensure the arrival of the module when the flatness of the company can also provide module installation CD-ROM and supporting the installation of the module tools can cash delivery, I feel dissatisfied may not. Jinan Shengyang fire-resistant ladle slide gate cotton has a good effect of fire-resistant insulation and insulation to improve the overall fire-resistant insulation kiln, and promote the progress of the furnace masonry technology. Classification temperature 1050-1400 ℃.
Note: a variety of fire-resistant cotton, is the corresponding material acupuncture blanket, according to the fiber component structure, size, made in the special machinery. In the processing process, are to maintain a certain percentage of compression to ensure that fire-resistant cotton lining lining is completed, the fire-resistant cotton in different directions of expansion, so that between the fire-resistant cotton into a seamless seamless with each other, Various forms of anchors clay insulating bricks are directly attached to the steel plate anchor bolts of the industrial furnace shell.
Second, the product features: excellent chemical stability; excellent thermal stability; excellent flexibility, the module in the pre-pressure state, in the lining after the completion of the expansion of the module so that the lining seamless and can compensate for fiber lining shrink, Improve the thermal insulation properties of fiber lining, the overall performance is good; excellent thermal stability and thermal shock resistance; ceramic fiber module installed quickly, and anchors set in the cold wall lining, can reduce the anchor material requirements. According to the customer for different furnace insulation design and construction training.
Third, the industrial furnace fire-resistant cotton insulation advantages:
1, cost-effective, construction costs flat or even lower than the brick structure.
2, long life, material composition is extremely stable, stable service life can reach 5 - 10 years, effectively saving maintenance costs and enhance the use of the cycle.
3, energy-saving effect is obvious, a conventional tunnel kiln, a year can save 100-200 tons of coal, reduce costs, increase profits and competitiveness.
4, low density: light insulation than brick lining more than 75% lighter than light weight castable lining 90% to 95%. Such as the use of fiber lining can greatly reduce the furnace load of steel, to extend the furnace life.
5, anti-quench cold hot, will not be damaged due to open shutdown.
6, the construction is simple: the construction process without leaving the expansion joints, construction workers after basic training can be posts, construction technology on the insulation effect of the lining of small.
7, no oven: lining construction can be put into use, no oven program.
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,firebrick refractory,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.
Note: a variety of fire-resistant cotton, is the corresponding material acupuncture blanket, according to the fiber component structure, size, made in the special machinery. In the processing process, are to maintain a certain percentage of compression to ensure that fire-resistant cotton lining lining is completed, the fire-resistant cotton in different directions of expansion, so that between the fire-resistant cotton into a seamless seamless with each other, Various forms of anchors clay insulating bricks are directly attached to the steel plate anchor bolts of the industrial furnace shell.
Second, the product features: excellent chemical stability; excellent thermal stability; excellent flexibility, the module in the pre-pressure state, in the lining after the completion of the expansion of the module so that the lining seamless and can compensate for fiber lining shrink, Improve the thermal insulation properties of fiber lining, the overall performance is good; excellent thermal stability and thermal shock resistance; ceramic fiber module installed quickly, and anchors set in the cold wall lining, can reduce the anchor material requirements. According to the customer for different furnace insulation design and construction training.
Third, the industrial furnace fire-resistant cotton insulation advantages:
1, cost-effective, construction costs flat or even lower than the brick structure.
2, long life, material composition is extremely stable, stable service life can reach 5 - 10 years, effectively saving maintenance costs and enhance the use of the cycle.
3, energy-saving effect is obvious, a conventional tunnel kiln, a year can save 100-200 tons of coal, reduce costs, increase profits and competitiveness.
4, low density: light insulation than brick lining more than 75% lighter than light weight castable lining 90% to 95%. Such as the use of fiber lining can greatly reduce the furnace load of steel, to extend the furnace life.
5, anti-quench cold hot, will not be damaged due to open shutdown.
6, the construction is simple: the construction process without leaving the expansion joints, construction workers after basic training can be posts, construction technology on the insulation effect of the lining of small.
7, no oven: lining construction can be put into use, no oven program.
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,firebrick refractory,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11月1日星期二
Currently the most commonly used method of producing refractory balls
Machine pressure forming method is currently the most used in the production of refractories ball forming method. The method uses a pressure ball machine and a steel mold to press the prepared refractory material into a sphere. Because of the general machine pressure forming refers to the water content of 4% to 9% of the semi-dry material forming method, which is also called semi-dry forming. The method commonly used equipment friction brick press, lever press and hydraulic press and so on.
Machine pressure forming process is essentially a ball material within the particle-intensive and air discharge, the formation of dense sphere process. The ball-forming fire-resistant ball has the advantages of high density, high strength, small drying shrinkage and small shrinkage, easy control of fire-resistant ball size, so this method is the main part in refractory firebrick ball production. In order to obtain a dense sphere during press forming, sufficient pressure must be applied to the pellet. The size of the pressure should be able to overcome the internal friction between the pellet material, to overcome the external friction between the pellet and the mold wall to overcome the insulating castable moisture, particles and fill in the mold caused by uneven pressure distribution Uniformity.
The ratio between the three depends on the ball material dispersion, particle composition, ball material moisture, the size and shape of the sphere. Although the relationship between pressure and the densification of the sphere can be calculated by a number of theoretical formulas, such as the variation of the porosity of the sphere with pressure in logarithmic relation, the experimental method is usually used to determine the pressure per unit area of the sphere, Brick machine should have the total pressure.
Mechanical forming of the ball material requirements in addition to water should have a certain range of fluctuation, its particle size also has certain requirements, such as should have a reasonable grain size ratio, bulk density as large as possible. General critical particle size of 3 ~ 5mm, less than 0.088mm of fine powder content should be 35% to 45% range. The most common defects in machine-formed fire-resistant spheres are the crack and layer density. Spallation is the formation of pressure in the vertical direction of the pressurized layer of cracks. Ball material moisture is too high, too much powder, too little bonding agent and pressure will lead to the production of spall.
Therefore, in the production of these parameters must be controlled. Layer density phenomenon that the shape of the fireball after the density along the pressure direction of the inverter. By the above one-way pressurized insulating refractory cement ball is generally dense under the sparse, the same level is dense in the outer sparse. This is due to the friction between the pellet material and the ball material and the friction between the mold wall caused by the pressure decrease. Double-sided pressure and the wall in the mold coated with lubricating oil to reduce the external friction of the method can reduce this phenomenon and reduce the porosity of the sphere.
Selection of molding equipment should be based on the quality requirements of refractory balls, size and production volume for comprehensive consideration. General refractory ball with a simple fireball or shape, quantity, quality requirements of the general products, the choice of production efficiency of the high pressure ball machine; high quality requirements of the fireball can be nominal pressure not less than 2000K N friction Pressure ball machine.
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.
Machine pressure forming process is essentially a ball material within the particle-intensive and air discharge, the formation of dense sphere process. The ball-forming fire-resistant ball has the advantages of high density, high strength, small drying shrinkage and small shrinkage, easy control of fire-resistant ball size, so this method is the main part in refractory firebrick ball production. In order to obtain a dense sphere during press forming, sufficient pressure must be applied to the pellet. The size of the pressure should be able to overcome the internal friction between the pellet material, to overcome the external friction between the pellet and the mold wall to overcome the insulating castable moisture, particles and fill in the mold caused by uneven pressure distribution Uniformity.
The ratio between the three depends on the ball material dispersion, particle composition, ball material moisture, the size and shape of the sphere. Although the relationship between pressure and the densification of the sphere can be calculated by a number of theoretical formulas, such as the variation of the porosity of the sphere with pressure in logarithmic relation, the experimental method is usually used to determine the pressure per unit area of the sphere, Brick machine should have the total pressure.
Mechanical forming of the ball material requirements in addition to water should have a certain range of fluctuation, its particle size also has certain requirements, such as should have a reasonable grain size ratio, bulk density as large as possible. General critical particle size of 3 ~ 5mm, less than 0.088mm of fine powder content should be 35% to 45% range. The most common defects in machine-formed fire-resistant spheres are the crack and layer density. Spallation is the formation of pressure in the vertical direction of the pressurized layer of cracks. Ball material moisture is too high, too much powder, too little bonding agent and pressure will lead to the production of spall.
Therefore, in the production of these parameters must be controlled. Layer density phenomenon that the shape of the fireball after the density along the pressure direction of the inverter. By the above one-way pressurized insulating refractory cement ball is generally dense under the sparse, the same level is dense in the outer sparse. This is due to the friction between the pellet material and the ball material and the friction between the mold wall caused by the pressure decrease. Double-sided pressure and the wall in the mold coated with lubricating oil to reduce the external friction of the method can reduce this phenomenon and reduce the porosity of the sphere.
Selection of molding equipment should be based on the quality requirements of refractory balls, size and production volume for comprehensive consideration. General refractory ball with a simple fireball or shape, quantity, quality requirements of the general products, the choice of production efficiency of the high pressure ball machine; high quality requirements of the fireball can be nominal pressure not less than 2000K N friction Pressure ball machine.
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.
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