- Time:Jul 04, 2023
refractory castable is a high-temperature refractory material, which is often used in the lining, bottom plate and plugging of industrial furnaces and kilns. According to different material composition and performance characteristics, common refractory castables can be divided into the following categories:
1. High alumina castable: High-alumina castable is mainly composed of high-purity alumina particles, which has high strength, corrosion resistance and high temperature resistance. It is suitable for ferroalloy smelting furnaces, electric furnaces, glass kilns, etc. under medium and high temperature environments.
2. Portland castables: Portland castables are based on Portland cement or phosphate cement, adding refractory aggregates and other additives, and have good fire resistance and corrosion resistance. It is suitable for non-ferrous metal smelting furnaces, cement kilns, petroleum catalytic devices, etc.
3. Silicon carbide castable: Silicon carbide castable is mainly composed of silicon carbide particles, which has extremely high temperature resistance and corrosion resistance, and is especially suitable for ultra-high temperature furnaces such as electric furnaces and high-temperature heat treatment equipment.
4. Phosphate castable: Phosphate castable is based on phosphate cement, adding refractory aggregate and other additives, which has good fire resistance and corrosion resistance. Suitable for high temperature equipment in metallurgy, chemical and ceramic industries.
5. High-temperature concrete: High-temperature concrete is composed of refractory aggregate, cement matrix and other additives, and has good high-temperature resistance and strength. It is suitable for the lining, bottom plate and plugging of some large industrial furnaces.
In addition to the common refractory castables mentioned above, there are other special-purpose refractory castables, such as spinel castables, chrome castables, etc., which have special physical and chemical properties and are suitable for specific high-temperature processes and environments.
In short, different types of refractory castables have their own characteristics and scope of application. Selecting the appropriate refractory castable can provide effective refractory protection and corrosion resistance, ensuring the stable operation of industrial furnaces and prolonging their service life.
