Dry Separation Technology for Recovering Fine Chalcopyrite by Rotary Triboelectrostatic Separator
Based on the triboelectric charging characteristics of the main minerals of quartz,molybdenite and chalcopyrite in a copper-molybdenum ore,the enrichment effect and mechanism of triboelectrostatic separation of chalcopyrite from the mixture under different conditions were investigated.The triboelectric charging results show that after the interaction with the rotary charger under applied electric voltage,chalcopyrite,molybdenite and quartz are remarkably different in charge-mass ratio.In mineral processing tests,a rotary triboelectrostatic separator(RTS)was adopted to treat an artificial ore with chalcopyrite,molybdenite and quartz in a mass ratio of 1∶1∶8.The results show that with the applied voltage of the rotary charger at-14 kV,the charger rotation speed at 5000 r/min and the co-flow air velocity at 2 m/s,a copper concentrate can be obtained with Cu grade up from 3.3%to 5.9%at Cu recovery of 90%,and with Cu grade up to 9.3%at a recovery of 50%.
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维普
