某铜冶炼渣选矿厂降低尾矿品位试验与实践

Experimental Study and Production Practice for Reducing the Tailing Grade in a Copper Smelting Slag Concentrator

针对某铜冶炼渣选矿厂尾矿品位偏高的问题,进行了大量的工艺参数条件试验研究。试验结果表明,在一段磨矿细度-74 μm 64.8%、二段磨矿细度-45 μm 90.1%、快速浮选Z-200用量440 g/t、快速浮选2 #油用量140 g/t、二段浮选Z-200用量140 g/t的条件下,浮选指标最优;同时,为了提高磨矿细度,改造了一段磨矿返砂槽、优化了磨矿介质控制参数。生产实践结果表明,炉渣含铜4.237%时,可获得铜精矿品位为20.696%,尾矿铜品位为0.286%的较好指标。

In view of the problem of high tailing grade in a copper smelting slag concentrator,a large number of technological parameter conditions tests were carried out.The results show that the flotation index is the best under the conditions of first stage grinding fineness -74 μm content 64.8%,second stage grinding fineness -45 μm content 90.1%,rapid flotation Z-200 dosage 440 g/t,rapid flotation 2 # oil dosage 140 g/t,second stage flotation Z-200 dosage 140 g/t.At the same time,in order to improve the grinding fineness,the revamping of the sand return trough of the first stage grinding is carried out,and the control parameters of grinding medium have been optimized.In production,when the slag contains 4.237% copper,the concentrate grade is 20.696% and the tailings grade is 0.286% can be obtained.