High alumina insulating bricks are also known as high alumina heat insulating bricks. It is the ideal insulation refractory material for industrial furnaces. It is characterized with high strength, low thermal conductivity, good insulation performance and low price.
It is a new type of lightweight insulating material which contains approximately 48% alumina,mullite and glass phase or corundum. It has such advantages as high porosity, small volume density, good insulation effect, high mechanical intensity, small thermal conductivity and long service life. For various industrial kilns & furnaces, it is a kind of essential refractory for energy saving and temperature preservation.
High alumina insulation brick is made by mud pouring method. The mud contains about 50% water. By adding a small amount of gypsum, the mud will quickly be solidified. An appropriate amount of phosphoric acid is added. The ratio of the dry raw materials and the phosphoric acid is controled within 1:0.7. Chemical reactions produce CO2. The reason why use phosphoric acid instead of hydrochloric acid and sulfuric acid is that the the phosphoric acid can increase the duration time of bubbles and enhance the structural strength of semi-finished products.
Since CO2 will be produced in the mud, the embryoid bodies should be removed after two hours to ensure that embryoid bodies become strong. Embryoid bodies should be dried for three days at a temperature of 60 ℃. The final step is firing. The semi-finished products should be fired at a temperature of 1600 degrees for about 4 days.
High Alumina Insulating Brick is widely used in lining or insulating layers of various industrial furnaces, and kilns in petrochemical, machinery, ceramic industry, such as lining and insulating layer of high temperature kilns, carbon black stove, gasifier, hydrogen manufacturing furnace and shuttle kiln, etc.
Zhengzhou sunrise refractory Co., Ltd. is a refractory supplier from China, offering various insulation bricks, such as high alumina insulation brick, fire clay insulation brick, silica insulation brick and mullite insulation brick.
Monday, November 30, 2015
Thursday, November 26, 2015
Ceramic Fiber Cloth Tape, Rope, Yarn
Ceramic Fiber Cloth Tape, Rope, Yarn are ceramic fiber textiles woven from Ceramic Fiber Yarn. Made of ceramic fiber yarn as raw materials and glass fiber or stainless steel wire as reinforcing materials, those products have high strength at high temperature, good flexibility and good machinability.
Ceramic fiber cloth and tape are a type of ceramic fiber product with light weight, good high temperature performance, good thermal stability, low thermal conductivity and low resistance to mechanical shock. It is designed for a variety of high temperature, high pressure and easy-to-wear environments. They are mainly used in fire doors and for the insulation of industrial furnaces and high temperature pipes and containers.
Ceramic fiber rope can be divided into ceramic fiber twisted rope, ceramic fiber braided rope, ceramic fiber square braided rope, ceramic fiber circular braided rope, ceramic fiber Matsunawa, flat ceramic fiber packing and flat ceramic fiber square rope. It is mainly used in the expansion joints of various industrial furnaces, insulation of high temperature pipes and insulation of steel junctions.
They are widely used for high temperature static sealing (e.g. door joint or gaskets for flanges), fire protection (e.g. fires proof curtain against welding spark), asbestos substitute, expansion joint, pipe or round duct insulation lagging and for manufacturing of safety products (e.g. safety gloves or apron).
Since Ceramic Fiber Cloth Tape, Rope, Yarn contain about 15% organic fiber, when heated for the first time, as the temperature rises, the organic fiber will be gradually carbonized and there will be smoke and even fire. This is a normal phenomenon and does not affect use. As the temperature continues to rise, the products will gradually turn white and the organic fiber is completely carbonized.
Zhengzhou Sunrise Refractory supplies various ceramic fiber products including ceramic fiber blanket, ceramic fiber board, ceramic fiber module, ceramic fiber vacuum formed shapes, calcium silicate board, ceramic millboard, ceramic fiber paper, ceramic fiber bulk, and ceramic fiber cloth tape, rope, yarn.
Ceramic fiber cloth and tape are a type of ceramic fiber product with light weight, good high temperature performance, good thermal stability, low thermal conductivity and low resistance to mechanical shock. It is designed for a variety of high temperature, high pressure and easy-to-wear environments. They are mainly used in fire doors and for the insulation of industrial furnaces and high temperature pipes and containers.
Ceramic fiber rope can be divided into ceramic fiber twisted rope, ceramic fiber braided rope, ceramic fiber square braided rope, ceramic fiber circular braided rope, ceramic fiber Matsunawa, flat ceramic fiber packing and flat ceramic fiber square rope. It is mainly used in the expansion joints of various industrial furnaces, insulation of high temperature pipes and insulation of steel junctions.
They are widely used for high temperature static sealing (e.g. door joint or gaskets for flanges), fire protection (e.g. fires proof curtain against welding spark), asbestos substitute, expansion joint, pipe or round duct insulation lagging and for manufacturing of safety products (e.g. safety gloves or apron).
Since Ceramic Fiber Cloth Tape, Rope, Yarn contain about 15% organic fiber, when heated for the first time, as the temperature rises, the organic fiber will be gradually carbonized and there will be smoke and even fire. This is a normal phenomenon and does not affect use. As the temperature continues to rise, the products will gradually turn white and the organic fiber is completely carbonized.
Zhengzhou Sunrise Refractory supplies various ceramic fiber products including ceramic fiber blanket, ceramic fiber board, ceramic fiber module, ceramic fiber vacuum formed shapes, calcium silicate board, ceramic millboard, ceramic fiber paper, ceramic fiber bulk, and ceramic fiber cloth tape, rope, yarn.
Sunday, November 22, 2015
What is Ceramic Fiber Bulk?
Ceramic fiber bulk is an excellent inorganic non-metallic material with various types and advantages of good insulation, heat resistance, corrosion resistance and high mechanical strength.
Ceramic fiber bulk is made of glass balls or waste glass by melting, drawing, winding and weaving. The diameter of the monofilament is several microns to twenty microns, equivalent of 1/20-1/5 of a single human hair. Each bundle of fiber precursor is composed of hundreds or even thousands of monofilaments.
Ceramic fiber bulk has good insulation performance. According to the physical principle, gas has low thermal conductivity, so excellent insulation materials usually have many air holes inside them. Ceramic fiber bulk has many air holes inside it and its fibers are in irregular arrangement, so it is an excellent insulation material with a low thermal conductivity of 0.03w/cm.k.
Ceramic fiber bulk has advantages of noncombustible, no distortion and no embrittlement. It can resist high temperature up to 700 degrees and has A1 level of combustion performance.
Ceramic fiber bulk has good corrosive resistance to strong acid and good recoverability. It has high tensile strength, more than 1.0kg, so it can resist any shock and vibration. It has low moisture absorption rate, close to zero.
Ceramic fiber bulk does not contain any bonding agent and has no smell and no toxic. Compared with the traditional glass wool and rock wool, it does not contain any bonding agent and will not give off any toxic, acrid smoke at high temperature.
Ceramic fiber bulk is usually used in the interior compartments and ceilings of advanced buildings and for the insulation of metal duct or the inner walls of bellows, noise absorption within the room and sweat control of metal ceilings.
Ceramic fiber bulk is made of glass balls or waste glass by melting, drawing, winding and weaving. The diameter of the monofilament is several microns to twenty microns, equivalent of 1/20-1/5 of a single human hair. Each bundle of fiber precursor is composed of hundreds or even thousands of monofilaments.
Ceramic fiber bulk has good insulation performance. According to the physical principle, gas has low thermal conductivity, so excellent insulation materials usually have many air holes inside them. Ceramic fiber bulk has many air holes inside it and its fibers are in irregular arrangement, so it is an excellent insulation material with a low thermal conductivity of 0.03w/cm.k.
Ceramic fiber bulk has advantages of noncombustible, no distortion and no embrittlement. It can resist high temperature up to 700 degrees and has A1 level of combustion performance.
Ceramic fiber bulk has good corrosive resistance to strong acid and good recoverability. It has high tensile strength, more than 1.0kg, so it can resist any shock and vibration. It has low moisture absorption rate, close to zero.
Ceramic fiber bulk does not contain any bonding agent and has no smell and no toxic. Compared with the traditional glass wool and rock wool, it does not contain any bonding agent and will not give off any toxic, acrid smoke at high temperature.
Ceramic fiber bulk is usually used in the interior compartments and ceilings of advanced buildings and for the insulation of metal duct or the inner walls of bellows, noise absorption within the room and sweat control of metal ceilings.
Wednesday, November 18, 2015
Refractory Application in the Walls of Glass Furnace Regenerators
In the glass furnace, walls of the regenerators are used to limit thermal losses. The main operating factors to be considered are temperature, repeated temperature cycling, airborne particulates, volatiles and load. Fuel and glass composition must also be considered when deriving the refractory specifications.
The walls in four zones as with checkers are subjected to different conditions:
1) Top zone: from the crown skewbacks to one meter under first row of checkers;
2) Mid zone: from the end of the top zone to 1,000°C;
3) Condensation zone: from 1,000°C to 700°C;
4) Lower zone: from 700°C to the Bottom.
The operating conditions are the same as for the crown but with minor load. Low iron basic refractories with a high periclase content and high grade mullite (95-97 percent mullite) are suitable for this area. As far as basic refractories are concerned the operating temperature must be under 1,500°C (1,460-1,480°C) to avoid creep.
Provided the target wall is exposed to the same conditions as the other top zone walls, then the refractory material will be as for the rest of the top zone. However, in the event the target wall is subject to excessive waste gas impingement then fused cast AZS block is recommended.
Checkers protect the mid zone wall. Temperature and load are lower compared to the top area, thus basic refractories with 95 per cent MgO or a good mullite are suitable for this area.
Chemical corrosion is not as strong as in the checkers because bricks are protected by the masonry and only one side is exposed to the chemical attack. Load is higher than on the overhung zones, but temperature is lower. Periclase based refractories, mullite and sillimanite bricks are suitable for this application.
Characteristics of this area are: high load, low temperature and a reduced chemical attack. Basic materials with 90-92 percent MgO, mullite, sillimanite and 44 per cent Al2O3 “super duty” are suitable for this application.
The internal separation walls are fully immersed in the high temperature environment and therefore the operating conditions are severe. They must resist loading at high temperature, and thus they must have high values of refractoriness under load and therefore high creep resistance.
Basic materials are suitable within the temperature limits indicated in the top zone (1,460-1,480°C), while different grades of mullite according to the different zones of the separation wall can be used.
Zhengzhou sunrise refractory Co., Ltd. is a refractory supplier from China, specializing in various refractories for glass furnaces, such as fused cast AZS block, magnesia bricks, silica brick and mullite bricks.
The walls in four zones as with checkers are subjected to different conditions:
1) Top zone: from the crown skewbacks to one meter under first row of checkers;
2) Mid zone: from the end of the top zone to 1,000°C;
3) Condensation zone: from 1,000°C to 700°C;
4) Lower zone: from 700°C to the Bottom.
The operating conditions are the same as for the crown but with minor load. Low iron basic refractories with a high periclase content and high grade mullite (95-97 percent mullite) are suitable for this area. As far as basic refractories are concerned the operating temperature must be under 1,500°C (1,460-1,480°C) to avoid creep.
Provided the target wall is exposed to the same conditions as the other top zone walls, then the refractory material will be as for the rest of the top zone. However, in the event the target wall is subject to excessive waste gas impingement then fused cast AZS block is recommended.
Checkers protect the mid zone wall. Temperature and load are lower compared to the top area, thus basic refractories with 95 per cent MgO or a good mullite are suitable for this area.
Chemical corrosion is not as strong as in the checkers because bricks are protected by the masonry and only one side is exposed to the chemical attack. Load is higher than on the overhung zones, but temperature is lower. Periclase based refractories, mullite and sillimanite bricks are suitable for this application.
Characteristics of this area are: high load, low temperature and a reduced chemical attack. Basic materials with 90-92 percent MgO, mullite, sillimanite and 44 per cent Al2O3 “super duty” are suitable for this application.
The internal separation walls are fully immersed in the high temperature environment and therefore the operating conditions are severe. They must resist loading at high temperature, and thus they must have high values of refractoriness under load and therefore high creep resistance.
Basic materials are suitable within the temperature limits indicated in the top zone (1,460-1,480°C), while different grades of mullite according to the different zones of the separation wall can be used.
Zhengzhou sunrise refractory Co., Ltd. is a refractory supplier from China, specializing in various refractories for glass furnaces, such as fused cast AZS block, magnesia bricks, silica brick and mullite bricks.
Sunday, November 15, 2015
Tuesday, November 10, 2015
What is Spun Ceramic Fiber Blanket
Spun ceramic fiber blanket is made of spun ceramic fiber cotton by needling, heat setting, vertically and horizontally cutting and rolling. Ceramic fiber blankets with different thickness and density provide a wide range of choice of materials to obtain the best insulation and energy efficiency.
Spun ceramic fiber blanket has uniform diameter, long fiber and low content of slag balls. Its interleaving degree, delamination, properties, erosion ressitance, flexibility and tensile strength are all improved, which improves the application performance of spun blanket and reduces the material loss. Spun blanket does not contain any binding agent to ensure that products have good reliability and stability in various environments.
Spun ceramic fiber blanket has low thermal conductivity, low thermal capacity, excellent thermal stability and thermal shock resistance, excellent tensile strength, excellent thermal insulation, good fire protection and sound absorption. It can be used in industrial furnaces, heating devices,high temperature pipe lining, industrial high-temperature reaction equipment, heating equipment lining, power boilers, gas turbine, furnace door, and high-temperature filter materials.
The heat capacity of spun ceramic fiber blanket is only 1/10 of that of lightweight refractory lining and light castable lining. The heat capacity of the lining material is is proportional to its weight. Low heat capacity means less heat absorption of the furnace in the reciprocating operation and higher heating rate. It can greatly reduce energy consumption of the temperature operation control, especially the start and shutedown of the heating furnace.
Zhengzhou Sunrise Refractory supplies various ceramic fiber products including ceramic fiber blanket, ceramic fiber board, ceramic fiber module, ceramic fiber vacuum formed shapes, calcium silicate board, ceramic millboard, ceramic fiber paper, ceramic fiber bulk, and ceramic fiber cloth tape, rope and yarn.
Spun ceramic fiber blanket has uniform diameter, long fiber and low content of slag balls. Its interleaving degree, delamination, properties, erosion ressitance, flexibility and tensile strength are all improved, which improves the application performance of spun blanket and reduces the material loss. Spun blanket does not contain any binding agent to ensure that products have good reliability and stability in various environments.
Spun ceramic fiber blanket has low thermal conductivity, low thermal capacity, excellent thermal stability and thermal shock resistance, excellent tensile strength, excellent thermal insulation, good fire protection and sound absorption. It can be used in industrial furnaces, heating devices,high temperature pipe lining, industrial high-temperature reaction equipment, heating equipment lining, power boilers, gas turbine, furnace door, and high-temperature filter materials.
The heat capacity of spun ceramic fiber blanket is only 1/10 of that of lightweight refractory lining and light castable lining. The heat capacity of the lining material is is proportional to its weight. Low heat capacity means less heat absorption of the furnace in the reciprocating operation and higher heating rate. It can greatly reduce energy consumption of the temperature operation control, especially the start and shutedown of the heating furnace.
Zhengzhou Sunrise Refractory supplies various ceramic fiber products including ceramic fiber blanket, ceramic fiber board, ceramic fiber module, ceramic fiber vacuum formed shapes, calcium silicate board, ceramic millboard, ceramic fiber paper, ceramic fiber bulk, and ceramic fiber cloth tape, rope and yarn.
Monday, November 9, 2015
Advantages of Ceramic Fiber Module
Ceramic fiber module is made of ceramic fiber blanket by folding and compressing. Currently, it gradually becomes the first choice for the thermal insulation of industrial furnace linings.
Ceramic fiber module has white color and regular size. It can be directly fixed to the anchor nail on the steel plate of the furnace shell. It has good insulation performance and can improve the integrity of the furnace. It simplifies and speeds up the construction of furnaces and promotes the masonry techniques of furnaces.
It has many advantages over the ceramic fiber blanket.
1) During installation, after releasing the tying, the folded blankets can generate a huge stress, which makes them crowded together tightly without gaps.
2) The flexibility of ceramic fiber blanket can compensate the deformation of the furnace shell and reduce the construction cost. At the same time, it can make up the gaps caused by the thermal changes of the different components.
3) Since it has light weight and low thermal capacity, it can significantly reduce the energy cost during the temperature operation.
4) Flexible ceramic fiber blanket can withstand external mechanical forces.
5) It has good resistance to thermal shock.
6) The ceramic fiber lining requires no drying and maintenance. It can be put into use immediately after the construction is completed.
7) It has stable chemical properties. It is not eroded by acids, bases, water, oil and vapor, except phosphoric acid, hydrofluoric acid and strong base.
It can be used for the furnace lining insulation in the petrochemical industry, metallurgical industry, ceramic industry, glass industry, heat treatment industry and other industries.
Zhengzhou Sunrise Refractory supplies various ceramic fiber products including ceramic fiber blanket, ceramic fiber board, ceramic fiber module, ceramic fiber vacuum formed shapes, calcium silicate board, ceramic millboard, ceramic fiber paper, ceramic fiber bulk, and ceramic fiber cloth tape, rope and yarn.
Ceramic fiber module has white color and regular size. It can be directly fixed to the anchor nail on the steel plate of the furnace shell. It has good insulation performance and can improve the integrity of the furnace. It simplifies and speeds up the construction of furnaces and promotes the masonry techniques of furnaces.
It has many advantages over the ceramic fiber blanket.
1) During installation, after releasing the tying, the folded blankets can generate a huge stress, which makes them crowded together tightly without gaps.
2) The flexibility of ceramic fiber blanket can compensate the deformation of the furnace shell and reduce the construction cost. At the same time, it can make up the gaps caused by the thermal changes of the different components.
3) Since it has light weight and low thermal capacity, it can significantly reduce the energy cost during the temperature operation.
4) Flexible ceramic fiber blanket can withstand external mechanical forces.
5) It has good resistance to thermal shock.
6) The ceramic fiber lining requires no drying and maintenance. It can be put into use immediately after the construction is completed.
7) It has stable chemical properties. It is not eroded by acids, bases, water, oil and vapor, except phosphoric acid, hydrofluoric acid and strong base.
It can be used for the furnace lining insulation in the petrochemical industry, metallurgical industry, ceramic industry, glass industry, heat treatment industry and other industries.
Zhengzhou Sunrise Refractory supplies various ceramic fiber products including ceramic fiber blanket, ceramic fiber board, ceramic fiber module, ceramic fiber vacuum formed shapes, calcium silicate board, ceramic millboard, ceramic fiber paper, ceramic fiber bulk, and ceramic fiber cloth tape, rope and yarn.
Monday, November 2, 2015
What is Ceramic Fiber Paper
Ceramic fiber paper is a type of sheet product made of ceramic fiber with addition of additives. It has good high temperature performance and good insulation performance. It is can be used as high temperature insulation materials, high temperature air filtering materials and high temperature buffer materials.
High temperature insulation fiber developed from the natural asbestos fiber to synthetic glass fiber and then to ceramic fiber. It is characterized by low density, low thermal conductivity, good resistance to thermal shock and mechanical shock, good elasticity and plasticity and good electrical insulation properties. It is a type of practical amorphous inorganic fiber.
Ceramic fiber paper is made of ceramic fiber cotton with a low content of slag balls by pulping, dross removing, molding, vacuum dewatering, drying and cutting.
Since it contains no asbestos, it is environment friendly and is an environmental alternative to asbestos. It has even fiber distribution, white color, no stratification, small slag balls and good strength. It has low thermal conductivity, low thermal capacity, good insulation, good chemical stability and corrosion resistance. The physical property like refractory and insulation keep same when meet with oil, water or steam. The paper is with smooth furnace and good flexibility, can be cut into suitable size. Besides, ceramic fiber paper has excellent dielectric strength; the binder will be burned out when fired.
Due to those advantages, it is widely used in machinery, petroleum, transportation, aerospace and other industries. It can used as welding thermal barriers, castings parcel , plant catalytic converters parcel, ladle parcels, thermocouple protection tube, sealing for furnace door, sealing and insulating pat, expansion joint for furnaces, insulating material for home application, filter material for high temperature, insulation material for glass and metal industry, insulations for car muffler and exhaust pipe, and fireproof.
Zhengzhou Sunrise Refractory supplies various ceramic fiber products including ceramic fiber blanket, ceramic fiber board, ceramic fiber module, ceramic fiber vacuum formed shapes, calcium silicate board, ceramic millboard, ceramic fiber paper, ceramic fiber bulk, and ceramic fiber cloth tape, rope and yarn.
High temperature insulation fiber developed from the natural asbestos fiber to synthetic glass fiber and then to ceramic fiber. It is characterized by low density, low thermal conductivity, good resistance to thermal shock and mechanical shock, good elasticity and plasticity and good electrical insulation properties. It is a type of practical amorphous inorganic fiber.
Ceramic fiber paper is made of ceramic fiber cotton with a low content of slag balls by pulping, dross removing, molding, vacuum dewatering, drying and cutting.
Since it contains no asbestos, it is environment friendly and is an environmental alternative to asbestos. It has even fiber distribution, white color, no stratification, small slag balls and good strength. It has low thermal conductivity, low thermal capacity, good insulation, good chemical stability and corrosion resistance. The physical property like refractory and insulation keep same when meet with oil, water or steam. The paper is with smooth furnace and good flexibility, can be cut into suitable size. Besides, ceramic fiber paper has excellent dielectric strength; the binder will be burned out when fired.
Due to those advantages, it is widely used in machinery, petroleum, transportation, aerospace and other industries. It can used as welding thermal barriers, castings parcel , plant catalytic converters parcel, ladle parcels, thermocouple protection tube, sealing for furnace door, sealing and insulating pat, expansion joint for furnaces, insulating material for home application, filter material for high temperature, insulation material for glass and metal industry, insulations for car muffler and exhaust pipe, and fireproof.
Zhengzhou Sunrise Refractory supplies various ceramic fiber products including ceramic fiber blanket, ceramic fiber board, ceramic fiber module, ceramic fiber vacuum formed shapes, calcium silicate board, ceramic millboard, ceramic fiber paper, ceramic fiber bulk, and ceramic fiber cloth tape, rope and yarn.
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