The converter large-surface repairing material is also called the converter hot repairing material. It uses high-purity magnesia as the main raw material. By adding fluidizing agent and special additives, it has good high-temperature spreadability, short sintering time, high strength after burning, long service life and pollution It has been used by many iron and steel enterprises such as Anshan Iron and Steel, Benxi Iron and Steel, and has a life expectancy of 1 to 2 times longer than that of traditional charging materials. It is well received by customers.