What is metallurgical magnesia

Metallurgical magnesia refers to magnesia used for sintering and repairing the bottom and lining of metallurgical furnace (open hearth furnace, converter and electric furnace). Metallurgical magnesia has a certain particle size composition, which is used for sintering and repairing the bottom and lining of metallurgical furnace (open hearth furnace, converter, electric furnace). It is divided into ordinary metallurgical magnesia and synthetic metallurgical magnesia. The former is obtained by directly calcining magnesite into sintered magnesite in a shaft or rotary kiln, and then crushing it to a certain particle composition. Because of its high melting point, it is difficult to sinter when using, so it is necessary to add flux when using, generally adding iron scale or open-hearth liquid. The latter is made by crushing magnesite, dolomite and other raw materials, adding appropriate sintering accelerator, making pellets, calcining them in a high-temperature rotary kiln or shaft kiln, and crushing them to certain particles. It is unnecessary to add flux during use, and the quality of furnace repair is good. The loose material for shell mold with aluminum phosphate as binder and calcined metallurgical magnesia as hardener was studied. High-purity crystal fused magnesia is a high-grade alkaline refractory material, which is widely used in metallurgy, building materials, chemical industry, national defense, aviation, aerospace and other industrial fields.