Experimental Study on Accurate Grinding of Luohe Iron Mine
In order to improve the one stage grinding capacity of Luohe Iron Mine,aiming at the prob-lem of insufficient overflow fineness,taking the one stage grinding product of Luohe Iron Mine as the re-search object,the accurate grinding test was carried out.The test results show that the accurate grinding ball loading system with the ball diameter ofϕ40 mm,ϕ30 mm andϕ20 mm of 40%∶50%∶10%and the average diameter of the mixed ball of 33 mm is adopted,compared with the on-site one stage overflow,the under-abrasive grade iron distribution rate in the closed-circuit test decreased from 37.81%to 20.78%,the quali-fied grade iron distribution rate increased from 42.32%to 59.89%,and the over-abrasive grade iron distri-bution rate decreased from 19.87%to 19.33%.The iron recovery rate of the concentrate product obtained by the magnetic separation test was 89.92%,which was higher than the iron recovery rate obtained by the larg-er ball loading system and the smaller ball loading system.Accurate grinding system can improve the particle size distribution characteristics of grinding products and improve the separation index of grinding products.
accurate grindingmagnetiteparticle size characteristicsmagnetic separation
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万方数据
维普
