First of all, there are many types of refractory castables, and the purpose of each refractory castable is also different. Such as corundum wear-resistant and refractory castables, low-cement refractory castables, lightweight heat-insulating refractory castables, steel fiber refractory castables, here is a brief introduction to the uses of several castables.
Corundum refractory castable has the characteristics of high strength and good fluidity, which is convenient for construction. It is mainly used for parts that are easy to scour and wear, such as the combustion chamber, separator and flue of circulating fluidized bed boiler.
Low-cement refractory castables are often used in cement kiln back kilns, kiln door covers, large cement kiln front coolers, tertiary air ducts, kiln mouths, coal injection pipes, etc.
Lightweight thermal insulation refractory castables have light bulk density, high strength, good thermal insulation performance, small bulk density, low thermal conductivity, good thermal insulation performance, uniform furnace temperature, energy saving, high fire resistance, strong overall performance, and peeling resistance Good, long service life and other characteristics, can repair and process various shapes or overall furnace lining at will. It is suitable for unshaped refractory materials formed by casting method. Compared with other unshaped refractory materials, the binder and moisture content are higher, and the fluidity is better. Therefore, the unshaped refractory materials have a wide range of applications. The materials and binders used can be selected according to the conditions of use. It can be directly poured into a lining body for use, and can also be used as a prefabricated block by pouring or vibrating method. Good workability, strong bonding force, long initial setting time and construction operation time, rapid strength growth, strong impermeability, no acid treatment, easy to ensure the compactness and fullness of the brickwork, and can significantly improve the chimney lining The air tightness and integrity of the wall and the anti-corrosion ability of the lining are ideal cementing materials for the lining of high chimneys, high temperature flues and air ducts.
Steel fiber refractory castables are mainly used for high temperature vulnerable parts of metallurgy, building materials and circulating fluidized bed boilers. In the building materials industry and other industrial kilns, refractory materials are required to have good peeling resistance and impact resistance. The exits, roofs, and side walls of the boiler and furnace are used for example: cement rotary kiln mouth, wet-process rotary kiln heat-resistant steel chain belt, cement kiln cooler, cement kiln coal injection pipe, etc. Cooler, coal injection pipe, decomposition furnace, preheater and other parts.
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