Magnesites are classified into caustic calcined magnesite, dead burned magensite and fused magnesite. The caustic calcined magnesite is mainly used as materials for chemical products, fertilizer, paper rubber, animal feeding, building and etc. The dead burned magensite is mainly used for making metallurgical powder as ramming material on the wall and bottom of the furnace, as gunning material to mend furnace lining, for making magnesia brick and chrome magnesia brick to be widely used on electric furnace, heating stove, blast furnace, converter, as well as nonferrous metallurgy. And the fused magnesite is mainly used for making fused magnesia bricks and other refractory materials, insulating materials, and etc.