A dolomite mine in Inner Mongolia is the production base of high-quality dolomite in In-ner Mongolia.The content of quartz in dolomite ore is high,which seriously affects the quality of dolomite,and then affects the efficiency of subsequent steel smelting and slag performance.In order to improve the quality of the dolomite,the crushing-grinding-flotation process is used for desilication treatment.The opti-mum grinding fineness and reagent system are determined by condition test.The test results show that un-der the optimal test conditions,the dolomite concentrate with MgO grade of 21.59%,CaO grade of 31.04%and SiO2 content of 0.53%is obtained through the closed-circuit flotation process of one roughing,one cleaning and one scavenging.The removal rate of SiO2 reached 82.83%,which provided an effective techni-cal solution for the desilication of the dolomite ore and provided technical support for the sustainable devel-opment of the mine.
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