Refractory is the basic material in the field of high temperature technology. Refractory materials are widely used as high-temperature resistant structural materials and linings in various thermal equipment and high-temperature containers. In the iron and steel metallurgical industry, coke ovens are mainly made of refractory materials. Blast furnace, hot blast stove, various steelmaking furnaces, soaking furnaces, heating furnaces, etc. This makes iron an absolutely indispensable refractory to meet the requirements. Not only does the casting of molten steel consume a lot of refractories, but also continuous casting needs some high-quality refractories.