新型捕收剂GC-I在铜矿渣浮选中的应用

Application of the New Collector GC-I in Flotation of the Copper Slag

铜冶炼炉渣为铜精矿经冶炼加工后剩余的炉渣,有价金属铜含量丰富,具有综合回收利用价值。某铜矿渣选厂采用Z-200为铜矿物捕收剂,选择性较好,但价格昂贵,基于此,研发了一种新型廉价浮选药剂替代Z-200。通过丁基黄原酸钠和二氯乙烷反应,合成新型捕收剂GC-I。与Z-200相比,新型捕收剂GC-I具有更低的药剂成本,更好的选择性。在磨矿细度为-0.045 mm占74%,石灰用量400 g/t,水玻璃用量600 g/t,GC-Ι用量105 g/t的条件下,经“1粗3扫”,获得铜品位23.84%、铜回收率82.37%的铜精矿;相同条件下,以Z-200为捕收剂,铜精矿中铜品位21.43%,铜回收率82.23%。通过闭路试验指标计算年药剂成本为69.93万元,每年预计降低药剂成本19.98万元,经济效益可观,具有一定的推广应用价值。

Copper smelting slag is the residual slag of copper concentrate after smelting and processing.It is rich in valuable copper and has comprehensive recycling value.Z-200 which is used as copper colloctor in a copper slag concentrator has good selectivity but high price.Therefore,a new cheaper flotation reagent GC-I was developed to replace Z-200.GC-I was synthesized by the reaction of sodium butyl xanthate with dichloroethane.Compared with Z-200,GC-I has lower cost and better selectivity.Under the condition of grinding fineness of-0.045 mm accounting for 74%,lime consumption of 400 g/t,water glass consumption of 600 g/t and GC-I consumption of 105 g/t,the copper concentrate with copper grade of 23.84%and copper recovery rate of 82.37%was obtained by"one roughing three scavenging"process flow.Under the same condition with Z-200 as collector,the copper grade of the copper concentrate was 21.43%,and the copper recovery rate was 82.23%.According to the closed-circuit test index,the annual cost of new flotation reagent is 699300 yuan.It is estimated that the cost of flotation reagent will be reduced by 199800 yuan every year.The economic benefit of new flotation reagent is considerable,which possesses certain application and promotion value.