山东某选矿厂原矿中铜矿物以黄铜矿为主,锌矿物以闪锌矿为主,采用铜锌混浮-铜锌分离的浮选试验流程生产铜精矿,但现场试验指标不理想,生产出来的铜精矿中铜的品位为9.10％,锌的品位为18.50％,铜精矿中锌含量太高难以满足销售指标要求.针对该选矿厂铜锌混合精矿浮选分离难的问题,在实验室对其进行了浮选试验研究.试验结果表明,脱药对铜锌分离效果影响显著,其中使用活性炭脱药试验效果最佳.试验采用活性炭作为铜锌混合精矿脱药剂,采用硫酸锌+亚硫酸钠的组合抑制剂作为锌矿物的抑制剂,采用对铜矿物选择性强的Z-200作为选铜捕收剂,通过“一粗一精一扫”浮选闭路试验,在原矿铜品位为9.10％,锌品位为18.50％的条件下,最终得到的铜精矿品位为13.55％,回收率为89.42％;精矿中锌品位从18.50％降到了6.23％.%The copper mineral and zinc mineral in the raw ore mainly exists in the form of chalcopyrite and sphalerite in a concentrate in Shandong.A circuit of mixed flotation of copper and zinc-separation of copper and zinc was used to produce copper concentrate,while the result that the grade of copper and zinc in copper concentrate are 9.10％ and 18.50％ separately was not good.The zinc ratio in copper concentrate was too high which made it difficult to meet the requirements that the sales target asked.For the difficulty of flotation separation of mixed copperzinc concentrate in the concentrator,the experiments on flotation were carried out in the laboratory.The result shows that the effect of separation of copper and zinc was greatly influenced by dereagent and the best result was got by using acticarbon to remove reagents,the experiment using acticarbon to remove the reagents,using combination inhibitor of zinc sulfate and sodium sulfite to inhibit zinc minerals and using Z-200 that had high selectivity for copper minerals as a collector.Mter a closed circuit of one roughing,one cleaning and one scavenging,copper concentrate with grade of 13.55％ and recovery 89.42％ were obtained when the mixed concentrate of copper-zinc with grade of 9.10％ copper and 18.50％ zinc,and the content of zinc in the copper concentrate was decreased from 18.50％ to 6.23％.
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