What is the refractoriness of silicon carbide refractory castable
Release time：2026-03-08
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What is the refractoriness of silicon carbide refractory castable? This directly relates to the performance and stability of silicon carbide castable. The refractoriness of silicon carbide refractory castable is greater than 1790℃, and its load softening temperature (deformation 4%) at 0.2MPa is 20~100℃ higher than that of CA50 cement refractory castable. Therefore, the application temperature of silicon carbide refractory castable is usually about 100℃ higher than that of CA50 cement refractory castable with the same raw materials. The thermal expansion coefficient of silicon carbide refractory castable exhibits expansion characteristics throughout the entire heating process. It can be seen that as the heating temperature increases, the thermal expansion rate increases, reaching a maximum of about 0.68% at 1250℃. Afterwards, it begins to slowly contract, with a thermal expansion rate of 0.43% at 1400℃. When the temperature reaches 1500℃, the thermal expansion rate returns to 0.5%. High-performance silicon carbide refractory castable features low moisture content, high strength, low linear change rate, and wide application scope. It has been widely used in industrial kilns such as metallurgy, petrochemical, machinery manufacturing, electric power, and building materials industries to replace traditional sintered refractory products as lining. Oscillating low and ultra-low silicon carbide refractory products are used as linings. Shock-type low and ultra-low silicon carbide refractory castables are mainly used as thick linings, such as for heating furnaces, various heat treatments, electric furnace covers, shaft kilns, rotary kilns, blast furnace tapholes, steel ladles, and iron ladles. Self-flowing low and ultra-low silicon carbide refractory castables are mainly used as thin linings and linings for high-temperature refractory components with metal anchors, such as the outer lining of water-cooled tubes in heating furnaces and the lining of integral spray guns for spray metallurgy.
