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Experimental study on copper-molybdenum comprehensive recovery from a zinc concentrate in Fujian

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  • Zijin Mining Group Co.,Ltd.
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Abstract:

The zinc concentrate of a zinc beneficiation plant in Fujian contains 47.33 % zinc,1.29 % copper,and 0.49 % molybdenum,with copper and molybdenum not effectively recovered.For this zinc concentrate,experimental research was conducted using a regrinding and agent removal-copper and molybdenum mixed flotation-copper and molybdenum separation process.The copper and molybdenum mixed flotation process employed a roughing stage,two scavenging stages,and three cleaning stages,followed by regrinding of the roughing concentrate,while the copper and molybdenum separation process included a roughing stage,a scavenging stage,and four cleaning stages.The closed-circuit test of the entire process yielded a copper concentrate containing 20.11 % copper and 0.78 g/t gold,with a  copper recovery rate of 65.9 %;a molybdenum concentrate containing 39.49 % molybdenum and 18.28 g/t rhenium,with a molybdenum  recovery rate of 93.0 %;and a zinc concentrate containing 49.53 % zinc,with a recovery rate of 99.0 %.This effectively reduced the impurities of copper and molybdenum in the zinc concentrate,while obtaining high-quality copper and molybdenum concentrates,achieving efficient separation of zinc,copper,and molybdenum.

Keywords:

zinc concentrate;regrinding and agent removal;mixed flotation;copper and molybdenum separation;comprehensive recovery