Research progress on purification technology of calcium removal from magnesite and development and application of magnesia-calcium-based refractories
Magnesite is an important mineral resource for industrial production.Due to the restriction of production process,a large number of low-grade magnesite cannot be effectively utilized.In order to improve the operation rate of this kind of magnesite purification process,the mechanism of action of inevitable ions,collectors and inhibitors on dolomite separation in the flotation process of magnesite was summarized,the influence of calcination temperature and raw material particle size on dolomite purification in the thermal separation process of magnesite was summarized,and the advantages and disadvantages of flotation/thermal separation process was analyzed.Finally,the application progress of magnesia-calcium-based refractories prepared by purified magnesite in the field of steelmaking was introduced.
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