According to the color, there are two types of silicon carbide: black silicon carbide and green silicon carbide. In the refractory industry, black silicon carbide is more commonly used.
1. Black silicon carbide powder, a high-grade refractory material, is also first-grade silicon carbide. The silicon carbide composition requirements of this category are the same as those used for abrasives. Generally, first-grade silicon carbide is mainly used to manufacture high-grade silicon carbide products, such as recrystallized silicon carbide products, gas turbine components, nozzles, lining materials in the high-temperature zone of blast furnaces, high-temperature kiln components, refractory saggers, etc. The content of first-grade silicon carbide is high, and the products produced are of good quality.
2. Black silicon carbide powder, a second-grade refractory material. The silicon content of this type of silicon carbide is greater than 90%. It is generally used in the manufacture of kiln components that are resistant to medium and high temperatures. Silicon carbide has good heat resistance, good thermal conductivity, and good chemical stability.
3. Black silicon carbide powder, a low-grade refractory material, is also third-grade silicon carbide. This category requires a silicon carbide content of not less than 83%, and is generally used in the lining of iron troughs, ladles, zinc smelting and sponge iron manufacturing industries.
