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SK34 is a material grade or standard for refractory bricks, usually used to indicate its fire-resistant performance and use. SK34 refractory bricks generally refer to a refractory material whose main feature is its ability to withstand relatively high temperatures and are commonly used for lining high-temperature industrial furnaces, kilns and furnaces, and other similar applications. Specifically, the meaning of SK34 refractory bricks is as follows: “SK”: This is a common naming method for refractory bricks, used to identify the type of brick. Different letter and number combinations represent different fire resistance properties and uses. “34”: This is the grade or grade of SK34 refractory bricks. SK34 usually indicates medium fire resistance and is suitable for use under moderate temperature and pressure conditions. SK34 refractory bricks are typically able to withstand temperatures of approximately 1300 degrees Celsius to 1400 degrees Celsius. Therefore, SK34 refractory bricks are often used for lining industrial furnaces, sintering furnaces, heat treatment furnaces, sintering furnaces, and other high-temperature equipment requiring moderate refractory properties. Different grades of refractory bricks are suitable for different temperatures and chemical environmental conditions, so when selecting refractory bricks, the appropriate grade needs to be determined based on specific application requirements.
Silica molybdenum bricks and magnesia-alumina spinel bricks are two different types of refractory bricks. They have some major differences in material composition and application fields. Material Composition Physical and chemical properties of silica molybdenum bricks. The “silicon” in silica molybdenum bricks refers to silicon carbide, and “moly” refers to mullite. Silica hemolysin bricks are made by sintering with high alumina bauxite and silicon carbide as the main raw materials. Refractory bricks. Essentially, silica molybdenum brick is just a high-alumina brick with silicon carbide added. Among them, some products may be mixed with refractory raw materials such as mullite, “three stones” and corundum. Magnesia-alumina spinel bricks: Magnesium-alumina spinel bricks are a type of alkaline refractory bricks. They mainly include unfired and fired block bricks. Spinels can also be synthesized to make amorphous refractory materials to form an overall structure. and gunned lining. The production process of magnesia-alumina spinel bricks is the same as that of ordinary magnesia bricks. Use Silica molybdenum bricks: Suitable for high-temperature environments such as high-temperature industrial furnaces and electric furnaces, and have good thermal shock resistance and fire resistance. Magnesia-alumina spinel bricks: Mainly used in industrial furnaces with high refractory requirements such as cement kilns and glass...
Mullite is an important refractory material that is widely used in the preparation of refractory products due to its excellent high-temperature stability and fire resistance. The following are some common refractory products with mullite as the main crystal phase: Mullite bricks: This is one of the common refractory products with mullite as the main crystal phase. Mullite bricks have good high-temperature stability and corrosion resistance and are widely used in the lining of various high-temperature industrial furnaces, glass kilns, and other equipment. Mullite castable: Mullite castable is a castable refractory material whose main components are mullite particles and refractory binders. It has good fluidity and is suitable for lining equipment with complex shapes, such as curved parts of kilns. Mullite ceramic products: Mullite ceramic products are often used in some high-temperature sintering or heat treatment processes, such as the lining of sintering kilns and ceramic kilns. They generally have higher fire temperature resistance and stability. Mullite fiber products: Mullite fiber is a high-temperature fiber commonly used in insulation and fire-resistant applications. They can be formed into felts, blankets, boards, etc. and are used to provide insulation and thermal insulation properties. Mullite ceramic filter plate: Mullite ceramic filter plate is often...
Choosing appropriate insulation bricks is an important step to improve the insulation effect of the kiln and achieve energy savings. Here are some suggestions: Thermal conductivity: The lower the thermal conductivity of the insulation bricks, the better the insulation performance. Therefore, materials with lower thermal conductivity should be selected. Common insulation brick materials include expanded vermiculite, expanded perlite, aluminum silicate fiberboard, etc. Density: The density of insulation bricks is also an important consideration. Typically, the lower the density, the lighter the brick and the better its insulation properties. However, it should be noted that too low density may lead to a decrease in strength, and a balance needs to be struck between thermal insulation performance and mechanical strength. High-Temperature Resistance: High temperatures are often reached inside the kiln, so it is important to choose insulation materials that can withstand high temperatures. Materials such as aluminum silicate fiberboard and expanded vermiculite perform well at high temperatures. Corrosion resistance: If there are corrosive gases or liquids such as acid and alkali in the kiln, choose insulation materials with good corrosion resistance to extend the service life of the insulation bricks. Size and shape: Insulation bricks should be sized and shaped to accommodate...
If you need to use refractory materials in high-temperature environments above 1700 degrees, you may want to consider these products, such as corundum mullite bricks, corundum bricks, zirconia bricks, high chromium bricks, etc. These materials have higher high-temperature resistance performance. Corundum mullite bricks Ingredients: Mainly composed of mullite and alumina. Characteristics: High compressive strength, high thermal stability, and good slag resistance. Application: Suitable for furnaces, heat treatment equipment, and other refractory structures at high temperatures. Corundum bricks Ingredients: The main ingredient is alumina (corundum). Characteristics: Very high hardness and fire resistance, suitable for high temperature, high pressure, and corrosive gas environments. Application: Commonly used in high-temperature industrial equipment such as glass kilns, electrolyzers, and metallurgical furnaces. Zirconia brick Ingredients: Mainly composed of zirconia. Features: Excellent high-temperature resistance, corrosion resistance, and thermal shock stability. Application: Suitable for metal smelting, electrolytic cells, high-temperature heat treatment equipment, etc. High chrome bricks Ingredients: The main ingredients are chromium oxide and ferrochromium alloy. Characteristics: Strong corrosion resistance, suitable for acidic and alkaline environments, and good fire resistance. Application: Commonly used in metallurgy, chemical industry, glass, and other industrial fields, especially in acidic environments. The load resistance of these materials is above 1700 degrees, and the...
Mullite poly-lightweight insulation brick JM30 is an insulation material made of mullite as the main raw material and made through high-temperature sintering. This material has the characteristics of lightweight, low thermal conductivity, and high-temperature resistance. It is often used as the insulation layer of high-temperature industrial furnaces such as tunnel kilns. In tunnel kilns, JM30 insulation bricks may be used in the following locations: Insulation layer for furnace top and furnace wall: In the furnace roof and furnace wall parts of the tunnel kiln, JM30 insulation bricks can be used as insulation materials to help reduce heat loss and improve energy utilization efficiency. Insulation layer inside the kiln tunnel: To reduce heat loss inside the tunnel kiln, JM30 insulation bricks can also be used as the insulation layer in the kiln tunnel to help maintain high-temperature combustion conditions. Insulation of other high-temperature areas: There may be other high-temperature areas in the tunnel kiln, such as drying areas, preheating areas, etc., and JM30 insulation bricks may also be used as insulation materials in these areas. It should be noted that JM30 insulation brick is a lightweight insulation material. Its main feature is excellent insulation performance, but it is relatively weak in...
For chimney maintenance, if the working temperature is between 700-800 degrees, you can choose medium-temperature refractory bricks or medium-temperature refractory castables. These materials are stable in medium-temperature environments and have good heat resistance. The main function of the chimney is to remove the waste smoke from the kiln, and it also plays a role in organizing the flame combustion in the furnace. When the temperature of the waste gas entering the chimney is high, the inner wall is usually built with a working layer of clay refractory bricks. If the flue gas is acidic, acid refractory bricks are built, and lightweight refractory castables are also used. Here are some suggestions for using refractory materials for chimney maintenance: Refractory bricks: Refractory bricks are usually made of materials with moderate aluminum content and have certain high-temperature resistance and corrosion resistance. This type of refractory brick provides good performance under medium temperature conditions and is a common choice for chimney maintenance, such as clay refractory bricks, high-temperature acid-resistant bricks, etc. Medium-temperature refractory castable: Medium-temperature refractory castable is a refractory material that can be poured or sprayed, usually composed of aluminum- or silicon-containing granular materials. It is suitable for surface repair and protection in...
The quality of high alumina bricks is mainly distinguished by their appearance, physical and chemical indicators, sound, weight, etc. This is what we need to consider when purchasing high alumina bricks. Next, the editor will help you to understand. 1. Appearance The surface of high-alumina bricks is smooth to the naked eye, beige in color, flat on all sides, with no corner cracks, and few black spots. The color will vary depending on the alumina content. The higher the alumina content, the color will be whiter. The black spots on the surface of high alumina bricks are mainly formed during the calcining process of iron oxide. If the black spots appear in a large area, it indicates that the iron oxide content of the brick is too high, which indicates that there is a problem with its proportion. , will affect the service life of the brick. 2. Sound When two bricks are struck, the sound of high-quality high-alumina bricks will be crisp and not dull. 3. Weight According to the weight specification, the general weight of first-grade high alumina bricks is about 4.4 kg, the weight of second-grade high alumina bricks is about 4.0 kg, the weight of third-grade...
Transportation of refractory materials and refractory products All refractory materials and refractory products must have factory certificates that meet the design technical conditions. One month before furnace construction, copy the factory test reports of all refractory materials and submit them to the metallurgical furnace major of the design institute or the working group of the design institute on the construction site. Before the product leaves the factory, it should be accompanied by a quality certificate, indicating the product name, brand, inspection results, and factory list (brick number, quantity, factory date, and train number). The shipment and use of refractory materials without product certificates are strictly prohibited. The means of transporting refractory materials and refractory products (trains, cars, ships, etc.) must be cleaned before shipment and must not be contaminated by oil or other impurities. Refractory materials must be protected from rain and snow during transportation to prevent rain and rainwater from entering. Various clay bricks, high alumina bricks, lightweight bricks, and lightweight standard bricks should be packed in containers or other solid packaging before transportation; standard clay bricks and ordinary clay bricks can be wrapped with straw ropes before transportation. During transportation, care should be taken to avoid damaging the...
Refractory cement refers to cement with a refractoriness of not less than 1580°C. Refractory cement is a hydraulic cementitious material made from bauxite and limestone as raw materials. It is fired into clinker with calcium aluminate as the main component and an alumina content of about 50%, and then ground. According to different compositions, it can be divided into aluminate refractory cement, low calcium aluminate refractory cement, etc. Refractory cement can be used to bind various refractory aggregates (such as corundum, burned high-alumina clay, etc.) to make refractory castables, refractory mortars, or refractory concrete, and can be used as linings for cement rotary kilns and other industrial kilns. When baking refractory cement furnace lining, the following matters must be paid attention to 1. At the normal temperature 350℃ stage, local bursting is most likely to occur, so special attention should be paid to slow baking. If a large amount of steam still emerges after insulation at 350℃, the heating rate should still be slowed down. 2. Under conditions where ventilation is poor and water vapor cannot be easily discharged, the heat preservation time should be appropriately extended. 3. When baking with heavy oil, be careful not to spray heavy oil...
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