Rotary kiln is an important industrial equipment, mainly used to produce cement, lime and other materials. Since its interior needs to withstand extreme environments such as high temperature, high pressure, and erosion, it is necessary to lay a large amount of refractory materials to protect the equipment. The rotary kiln uses different types and shapes of refractory materials to meet different process requirements according to their special positions and functions. These refractory materials have excellent properties such as high temperature, high pressure, corrosion resistance and wear resistance, which can effectively protect the rotary kiln equipment, prolong its service life, improve production efficiency and economic benefits. Rotary kiln refractory materials include high alumina refractory materials, silicate refractory materials, alumina refractory materials, etc.