Basic introduction of silicon carbide refractory

Silicon carbide refractory uses silicon carbide sand as the main raw material and uses different binders to produce it. Silicon carbide is one of the non-oxide refractory materials commonly used in the field of refractory materials. Its thermal conductivity is high, about 10 to 14 times that of clay products; it has high temperature resistance to erosion, oxidation, aging, deformation, thermal shock resistance, high temperature strength, good thermal conductivity, wear resistance, use Long life and other characteristics. Widely used in functional ceramics, advanced refractories, abrasives and metallurgical materials.

 

Silicon carbide refractory has special properties, which determines that it can be used in different application conditions and different industrial fields. Due to its high thermal conductivity, silicon carbide refractories are widely used in the manufacture of muffle furnaces, heating hearths and heat exchangers, box bowls, carburizing boxes, thermowells, closed-end temperature measuring tubes and large bricks. Silicon carbide products can be used in many non-direct heating furnace structures, such as zinc distillation towers, vertical and horizontal distillation tanks. The special chemical properties of silicon carbide refractories make it useful in various furnaces and installations in the non-ferrous metallurgy and chemical industries. Silicon carbide refractories are also used in steam boilers.

Common problems in the use of silicon carbide in refractory materials

1. Oxidation: Silicon carbide can react with oxygen at a high temperature of 800 ° C. Only when a SiO2 protective film is formed can the oxidation reaction be slowed.

2. Water vapor: It can react with water vapor at high temperature, and a large amount of SiO2, Si or C appears on silicon carbide, resulting in material damage.