Fused magnesia is high quality magnesite stone hitches in electric arc furnace after high temperature melting high purity oxide, its main features are: complete structure, compact structure, high melting point (2800 ℃), stable chemical performance, compression strength, insulation performance is strong, erosion resistance, corrosion resistance, is metallurgy, building materials, light industry, lining and the loose material, the important raw materials for steel, cement, glass, non-ferrous metal smelting and other industries indispensable important refractory material. Its main purpose is: in the metallurgy refractories industry production of high purity fused magnesia, gunning materials, ramming material and other auxiliary refractory materials and flow of the steel brick, magnesite brick, magnesite chrome brick and other special firebrick, can also be used in vacuum and the vacuum induction furnace, electric arc furnace refractory lining, is the production of magnesia crucible ideal material, high temperature furnace and all sorts of casing.