| Magnesite is a very important non-metallic mineral.And it is widely applied in metallurgic,building materials,chemical industry and so on.Low grade magnesite can't be used directly as material of refractory,and as the continuously mining,the reserves of high grade magnesite becomes less and less.Therefore,for better utilization the resources,it is necessary to find a purification method,which is suitable for low grade magnesite.The research used the kind of low grade magnesite as the material.The high grade... |