Lightweight mullite brick Features:
1. Low thermal conductivity, low heat capacity.
2. High purity, impurity content less.
3. High temperature, direct contact with the flame.
4. High strength, and has excellent thermal shock resistance. Applicable to metallurgy, petrochemical, building materials, ceramics, machinery and other industries of various industrial furnace hot surface lining and backing. Heat treatment furnace, resistance furnace, tunnel kiln, roller kiln, bell kiln, glass tank kiln and so on. The Refractory company products are widely used in many industries, such as: cracking furnace, reformer, heating device, refining device, regenerating device, hot air furnace.
Features:
Higher refractoriness, up to 1790 ℃ or more. The softening start temperature of the load is 1600 to 1700 ° C. Room temperature compressive strength of 70 ~ 260MPa. Thermal shock resistance is good. There are sintered mullite bricks and fused Mullite Insulating Firebrick. Sintered mullite brick to bauxite clinker as the main raw material, adding a small amount of clay or bauxite as binder, by molding, firing and made. Fused mullite refractory brick to high bauxite, industrial alumina and fireclay refractories as raw materials, by adding charcoal or coke fine particles as reducing agent, forming after the use of reduced melting method to manufacture. The fused mullite is more crystalline than the sintered mullite and has a better thermal shock resistance than the sintered product. Their high temperature properties depend mainly on the alumina content and the homogeneity of the mullite phase with the glass distribution.
2017年1月11日星期三
2016年12月21日星期三
New type of high alumina brick lead smelting furnace in different parts of which use
Lead smelting of lead sulfide concentrate, usually contain a certain amount of Zn, in the smelting process is also the oxidation of ZnS, while part of the reduction, part of the re-oxidation into the lead-rich slag, part of the form of steam into the flue gas, With the flue gas rising again in the process of secondary air oxidation, or contact with other elements after oxidation, while the flue gas contains large amounts of SO2 gas and high oxygen partial pressure. In the melt contains a lot of PbO and metal Pb, along with other normal slag composition, that is, FeO, CaO, SiO2, Fe3O4 and other impurities.
Melt a large number of PbO and Pb are low melting point material, in the 1000-1150 ℃ melting temperature, have good mobility and penetration, it is easy to penetrate into the cracks within the refractory brick. Pb infiltration into the brick body gap, the oxygen is oxidized into PbO, the volume will increase about 20%, which will greatly fill the gap of high alumina brick.
In addition, during the use of high-alumina bricks, the melt penetrates into the high-alumina bricks along the capillary channels such as pores and cracks, and interacts with it to form a metamorphic layer different from the original Clay, High Alumina insulating bricks. When the furnace temperature Fluctuations, the metamorphic layer will crack, peeling, melt deeper into the brick, the thicker the metamorphic layer, the thicker peeling structure. If the local oxygen potential in the furnace is high, it is easy to reoxidize the Cr2O3 in the local high alumina brick, and Cr3 + is oxidized to cr6 +, so that PbO reacts with CrO3 due to the strong basicity, and low PbO · CrO3 is formed, Anti - scouring performance of Bottom Frame &Skid Platform Brick for Heating Furnace.
At the same time, and the formation of high alumina brick Cr2O3 and other substances are a lso low melting point material, is not conducive to the formation of high melting point solid phase material. ZN vapor in the flue gas, if combined with Fe2O3 in the high-alumina refractory brick for sale, is reduced to a low-melting FeO phase and Zn is oxidized to ZnO, the volume of ZnO will be expanded by 5-6 times, In the infiltration of parts of the expansion effect. SO2 components within the flue gas, etc. on the composition of high alumina brick also has a certain chemical effect.
The characteristics of these slag and flue gas characteristics of high-alumina smelting furnace metallurgical furnace use has special requirements.
Melt a large number of PbO and Pb are low melting point material, in the 1000-1150 ℃ melting temperature, have good mobility and penetration, it is easy to penetrate into the cracks within the refractory brick. Pb infiltration into the brick body gap, the oxygen is oxidized into PbO, the volume will increase about 20%, which will greatly fill the gap of high alumina brick.
In addition, during the use of high-alumina bricks, the melt penetrates into the high-alumina bricks along the capillary channels such as pores and cracks, and interacts with it to form a metamorphic layer different from the original Clay, High Alumina insulating bricks. When the furnace temperature Fluctuations, the metamorphic layer will crack, peeling, melt deeper into the brick, the thicker the metamorphic layer, the thicker peeling structure. If the local oxygen potential in the furnace is high, it is easy to reoxidize the Cr2O3 in the local high alumina brick, and Cr3 + is oxidized to cr6 +, so that PbO reacts with CrO3 due to the strong basicity, and low PbO · CrO3 is formed, Anti - scouring performance of Bottom Frame &Skid Platform Brick for Heating Furnace.
At the same time, and the formation of high alumina brick Cr2O3 and other substances are a lso low melting point material, is not conducive to the formation of high melting point solid phase material. ZN vapor in the flue gas, if combined with Fe2O3 in the high-alumina refractory brick for sale, is reduced to a low-melting FeO phase and Zn is oxidized to ZnO, the volume of ZnO will be expanded by 5-6 times, In the infiltration of parts of the expansion effect. SO2 components within the flue gas, etc. on the composition of high alumina brick also has a certain chemical effect.
The characteristics of these slag and flue gas characteristics of high-alumina smelting furnace metallurgical furnace use has special requirements.
2016年11月21日星期一
Characteristics and Application of Refractory Castables with High Aluminum and Low Cement Content
refractories castable is made of refractory aggregate and high alumina cement. During the preparation process, the particle gradation of the fine aggregate fraction was not well designed. Cement particles are also coarse (specific surface area is generally 3000cm2 / g or so), the amount of cement is generally 15 to 25 percent, and the construction water consumption is 10 to 15 percent. Coupled with the amount of cement and more coarse particles, so that the cement can not be fully hydrated, resulting in poor performance of castables.
Low cement castable refractory castable is to overcome the shortcomings of the traditional refractory castable, the use of lower cement content, ultrafine powder technology, the correct design of aggregates push collection, and the use of highly efficient surface-active additives and other comprehensive technical measures prepared from, With the traditional refractory material pouring
High solidification rate, good volume stability, after drying and calcination, the volume shrinkage is small "and so on. It has the characteristics of low cement content, high compactness and low porosity, high normal temperature curing strength, good volume stability.
"GJ-180 high-strength refractory company castable" is based on fused white fused alumina as aggregate with pure calcium aluminate cement as the binder made of. The highest temperature of use of this casting material to 1800 ℃, 1400 ℃ under the hot state of the flexural strength of 7.4MPa, at high temperatures also has a good Wear resistance. It is suitable for the new kiln dry kiln cement kiln, three-channel coal nozzle and other parts used.
"GJ-18S castable" is fused white corundum as aggregate, it is a low cement content of refractory castable, the castable has a high mechanical strength and erosion resistance, erosion resistance, the maximum temperature of 1600 ℃ , Depending on its performance, this castable is suitable 1000 ~ 1400 ℃, the impact of serious wear and tear of large cement kiln mouth, multi-cylinder cooler elbow and other parts used.
"LC-160 castable" is a low-cement refractory castable, is based on high alumina bauxite clinker aggregate, pure calcium aluminate cement as a binder prepared, suitable for small and medium-sized dry kiln cement kiln mouth, Cooler elbow parts apply.
"GJ-15B (or GJ-15A) castable" commonly known as alkali-resistant high-alumina low-cement refractory castable, refractory brick for sale, it is through the matrix composition of the adjustment and control of preparation, with high mechanical strength, alkali corrosion, Temperature of 1500 ° C, suitable for cement production
The original, the fuel contains alkali, sulfur, chlorine high number of large dry kiln.
Low cement castable refractory castable is to overcome the shortcomings of the traditional refractory castable, the use of lower cement content, ultrafine powder technology, the correct design of aggregates push collection, and the use of highly efficient surface-active additives and other comprehensive technical measures prepared from, With the traditional refractory material pouring
High solidification rate, good volume stability, after drying and calcination, the volume shrinkage is small "and so on. It has the characteristics of low cement content, high compactness and low porosity, high normal temperature curing strength, good volume stability.
"GJ-180 high-strength refractory company castable" is based on fused white fused alumina as aggregate with pure calcium aluminate cement as the binder made of. The highest temperature of use of this casting material to 1800 ℃, 1400 ℃ under the hot state of the flexural strength of 7.4MPa, at high temperatures also has a good Wear resistance. It is suitable for the new kiln dry kiln cement kiln, three-channel coal nozzle and other parts used.
"GJ-18S castable" is fused white corundum as aggregate, it is a low cement content of refractory castable, the castable has a high mechanical strength and erosion resistance, erosion resistance, the maximum temperature of 1600 ℃ , Depending on its performance, this castable is suitable 1000 ~ 1400 ℃, the impact of serious wear and tear of large cement kiln mouth, multi-cylinder cooler elbow and other parts used.
"LC-160 castable" is a low-cement refractory castable, is based on high alumina bauxite clinker aggregate, pure calcium aluminate cement as a binder prepared, suitable for small and medium-sized dry kiln cement kiln mouth, Cooler elbow parts apply.
"GJ-15B (or GJ-15A) castable" commonly known as alkali-resistant high-alumina low-cement refractory castable, refractory brick for sale, it is through the matrix composition of the adjustment and control of preparation, with high mechanical strength, alkali corrosion, Temperature of 1500 ° C, suitable for cement production
The original, the fuel contains alkali, sulfur, chlorine high number of large dry kiln.
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.
2016年10月24日星期一
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.
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.
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.
2016年10月10日星期一
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6月23日星期四
The Economy of Fused Cast Bricks in Glass Furnaces
refractories safely in the 1680℃. AZS also has excellent corrosion resistance to fly ash and vapor firebrick refractory sale of volatile components. Therefore, the temperature of the furnace can be increased to 100℃. Ina addition, there is a low risk of burning of materials. The crown is low, which increases the heat radiation and improve the melting rate and reduce the energy consumption.
Since 1965, the fused cast AZS crown high insulating brick has been used. The crown was initially built with common silica brick, mainly used in the glass fiber and borosilicate glass melting furnace. The fused cast AZS crown as well as the insulation method began to be actually used and its application was even expanded to large soda lime glass melting furnaces. In 1974, the structure was used in large cross-fired furnaces with a span of 11m. Besides, it is also used in the container glass furnace in castable refractory material France and can reduce 130 liters heavy oil per ton.
Fused cast AZS block has been used in the checker work of the regenerator and the crown in the glass furnace.
Fused cast AZS block has excellent resistance to the erosion by fly ash to the checker brick in the regenerator, which is confirmed by its application in the burner. Fused cast AZS is durable refractory fiber board than other bricks even it is only used in the upper layer of the checker work.
The performance of fused cast AZS block in the crown has been confirmed in the furnace with a small span. It shows excellent resistance. The new fused cast AZS crown structure as well as the insulation method developed by R.E.R from France has been used in the glass furnaces with a span of 11m and large furnaces. It is characterized by the use of light and firm magnetic structure and complete insulation with a 500mm insulation layer.
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.
Since 1965, the fused cast AZS crown high insulating brick has been used. The crown was initially built with common silica brick, mainly used in the glass fiber and borosilicate glass melting furnace. The fused cast AZS crown as well as the insulation method began to be actually used and its application was even expanded to large soda lime glass melting furnaces. In 1974, the structure was used in large cross-fired furnaces with a span of 11m. Besides, it is also used in the container glass furnace in castable refractory material France and can reduce 130 liters heavy oil per ton.
Fused cast AZS block has been used in the checker work of the regenerator and the crown in the glass furnace.
Fused cast AZS block has excellent resistance to the erosion by fly ash to the checker brick in the regenerator, which is confirmed by its application in the burner. Fused cast AZS is durable refractory fiber board than other bricks even it is only used in the upper layer of the checker work.
The performance of fused cast AZS block in the crown has been confirmed in the furnace with a small span. It shows excellent resistance. The new fused cast AZS crown structure as well as the insulation method developed by R.E.R from France has been used in the glass furnaces with a span of 11m and large furnaces. It is characterized by the use of light and firm magnetic structure and complete insulation with a 500mm insulation layer.
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6月6日星期一
Properties and applications of fused cast AZS
tundish well block the most widely used fused cast refractory brick. According to the ZrO2 content, it can be divided into 33#, 36# and 41#AZS.
Fused cast AZS magnesia carbon brick containing 33% ZrO2 is called 33# fused cast AZS; fused cast AZS containing 36% ZrO2 is called 36# fused cast AZS; fused cast AZS containing 41% ZrO2 is called 41# fused cast AZS.
Fused cast AZS is mainly composed of baddeleyite and corundum and their eutectic crystals. High viscosity glass phase is filled in the gaps of crystals. The crystals is directly precipitated monoblock stopper from the molten liquid and well developed. So, it has large crystal particles and stable crystal phase. Except the voids, it has compact structure and better density than the common sintered bricks. The pores are mainly closed pores and the crystals are intertwined each other, so it ladle slide gate has good mechanical properties and wear resistance. The impurities are difficult to invade the bricks. Therefore, this refractory brick has good corrosion resistance. besides, the transformation of ZrO2 at 900~1150℃ when heating or cooling may cause irregular deformation.
Fused cast AZS block can be used in areas in direct contact with molten metals and molten slags. It is the essential material used in the key areas that suffer from severe corrosion.
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.
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Fused cast AZS magnesia carbon brick containing 33% ZrO2 is called 33# fused cast AZS; fused cast AZS containing 36% ZrO2 is called 36# fused cast AZS; fused cast AZS containing 41% ZrO2 is called 41# fused cast AZS.
Fused cast AZS is mainly composed of baddeleyite and corundum and their eutectic crystals. High viscosity glass phase is filled in the gaps of crystals. The crystals is directly precipitated monoblock stopper from the molten liquid and well developed. So, it has large crystal particles and stable crystal phase. Except the voids, it has compact structure and better density than the common sintered bricks. The pores are mainly closed pores and the crystals are intertwined each other, so it ladle slide gate has good mechanical properties and wear resistance. The impurities are difficult to invade the bricks. Therefore, this refractory brick has good corrosion resistance. besides, the transformation of ZrO2 at 900~1150℃ when heating or cooling may cause irregular deformation.
Fused cast AZS block can be used in areas in direct contact with molten metals and molten slags. It is the essential material used in the key areas that suffer from severe corrosion.
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.
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Introduction of Changxing Refractory self-flow castable
2016年6月2日星期四
The Matrix Of Refractory Materials
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Bottom Frame &Skid Platform Brick for Heating Furnace |
Matrix has a decisive impact insulating castable on the properties of refractory products. During the use, the samage of refractories always starts from the matrix. Changing the matrix of refractories is an effective way to improve the properties of products.
Most refractory materials, refractory material according to the main crystal phase and matrix, can be divided into two types: refractories containing crystal phases and glass phase and refractories only containing crystals. The former includes fireclay brick, alumina brick silica brick, etc.. The latter includes magnesia brick, magnesia chrome brick, etc..
These products are fired at high temperature and contain a certain amount of liquid phase. refractory brick The liquid will not form glass phase when cooled but the crystalline matrix which is bonded together with the main crystal phase. The matrix crystal phases are different from the main crystal phase.
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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2016年6月1日星期三
Refractories for cement industry
Alkaline Refractories
Alkaline refractory material is available for high temperature calcination, also has superior chemical resistance property, which is a main refractory material for cement kiln to keep high production quality, high yield, low consumption and long-term safe operation. Currently main material for cement kilns include direct-bonded magnesia chrome brick, semi-direct bonded magnesia chrome brick, ordinary magnesia chrome brick , dolomite brick, zirconium and zirconium-free special magnesite brick, spinel brick and chemically bonded unburned magnesia chrome brick.
Alkaline refractory material is available for high temperature calcination, also has superior chemical resistance property, which is a main refractory material for cement kiln to keep high production quality, high yield, low consumption and long-term safe operation. Currently main material for cement kilns include direct-bonded magnesia chrome brick, semi-direct bonded magnesia chrome brick, ordinary magnesia chrome brick , dolomite brick, zirconium and zirconium-free special magnesite brick, spinel brick and chemically bonded unburned magnesia chrome brick.
Bricks properties are listed as follows:
High alumina brickHigh alumina brick has high compressive high insulating brick strength, high refractoriness under load and good thermal shock resistance. Because of its low cost with high quality, it is widely used in varieties of cement kilns. When to be used in arch crown, calcined alumina brick is better. High alumina bricks suitable for cement kilns include phosphate bonded alumina brick, phosphate bonded high alumina wear-resistant brick, anti-stripping alumina brick, chemically bound (special) castable refractory material alumina brick and general alumina brick and so on.
High alumina brickHigh alumina brick has high compressive high insulating brick strength, high refractoriness under load and good thermal shock resistance. Because of its low cost with high quality, it is widely used in varieties of cement kilns. When to be used in arch crown, calcined alumina brick is better. High alumina bricks suitable for cement kilns include phosphate bonded alumina brick, phosphate bonded high alumina wear-resistant brick, anti-stripping alumina brick, chemically bound (special) castable refractory material alumina brick and general alumina brick and so on.
Alkali Brick Series
Alkali brick has excellent alkali corrosion performance, under certain conditions, it will react with the alkali compound kiln materials and kiln gas, rapidl. yclay insulating bricks forming enclosed type dense protective enamel layer on the turn, preventing the continuing internal mixing and bricks "base crack ", which is a indispensable kiln lining material in NSP kiln. This series bricks include ordinary alkali-resistant brick, high-strength alkali-resistant brick, insulation alkali-resistant brick and arch type alkali-resistant brick.
Alkali brick has excellent alkali corrosion performance, under certain conditions, it will react with the alkali compound kiln materials and kiln gas, rapidl. yclay insulating bricks forming enclosed type dense protective enamel layer on the turn, preventing the continuing internal mixing and bricks "base crack ", which is a indispensable kiln lining material in NSP kiln. This series bricks include ordinary alkali-resistant brick, high-strength alkali-resistant brick, insulation alkali-resistant brick and arch type alkali-resistant brick.
Series refractory castables
Refractory castables can be produced with simple production process, which is flexible and convenient to be used in the cement kiln system. It has become increasingly common to be applied in the complex structure of cement kiln preheater system. Refractory castables suitable for cement kiln mainly include corundum castable, high alumina castable, alkali-resistant castables and light weight castable.
Refractory castables can be produced with simple production process, which is flexible and convenient to be used in the cement kiln system. It has become increasingly common to be applied in the complex structure of cement kiln preheater system. Refractory castables suitable for cement kiln mainly include corundum castable, high alumina castable, alkali-resistant castables and light weight castable.
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Molding methods of refractories and widely used refractories
There are many refractory material molding methods, such as common molding method, vibration extrusion method, extrusion method, pounding method and so on.
At present, when it comes to the production of firebrick refractory materials, the most frequent way of molding refractory material is machine pressure molding method which is a way using brick molding machine and mold to compress the clay material into body. because the clay contains 5% water it is called semi-dry molding method. Machine molding is with compact structure, high strength, narrow drying and firing way, and size is also easy to control.castable It can be divided into the single side pressure, and double sides pressure which can reduce the phenomenon of layer density.
refractory company The common refractory material are AZS brick, corundum brick, magnesite chrome brick, directly silica carbide, silicon carborundum brick, nitrides, silicides, sulfide, boride, carbide and other non oxide refractories materials; Calcium oxide, chromium oxide, aluminum oxide, magnesium oxide and so on..
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