云南某铜铅锌硫化矿铜铅分离浮选试验研究

Experimental Research on Copper-lead Flotation Separation of a Cu-Pb-Zn Sulfide Ore in Yunnan

云南某铜铅锌矿硫化矿含铜0.60%,铅2.43%,锌5.10%,在现场生产作业中采用"铜铅混浮,铜铅分离,尾矿选锌"的浮选工艺流程,存在的问题是铜铅分离指标不理想,铜铅精矿互含高。对该矿的铜铅混合精矿进行了铜铅分离浮选小型试验研究,结果表明,当混合精矿再磨到-0.074 mm粒级占80%,以亚硫酸钠、水玻璃和CMC为组合抑制剂代替重铬酸钾抑制方铅矿,以Z200代替乙黄药作为黄铜矿捕收剂,进行了铜铅分离浮选,获得了良好的分选指标,铜精矿含铜23.30%,含铅3.30%,铅精矿含铅64.66%,含铜0.50%,实现了铜铅分离。

A flotation flowsheet consisting of Cu-Pb bulk flotation, Cu-Pb separation and flotation of zinc from the tailings was heretofore adopted to treat a Cu-Pb-Zn sulfide ore in Yunnan which contains 0.60% of Cu, 2.43% of Pb and 5.10% of Zn, yet, the Cu-Pb separation was not effective. Experimental research on Cu-Pb flotation separation was carfled out after the buck concentrate was regrounded to -0.074 mm range of 80%, and the results show that, using a combined depressant consisting of Na2SO3, Na2SiO3 and CMC to substitute K2Cr2O7 to depress galena, and using Z200 to substitute ethylic xanthate to collect chalcopyrite, copper and lead can be separated effectively, while a copper con centrate containing 23.30% of Cu and 3.30% of Pb and a lead concentrate containing 64.66% of Pb and 0.50% of Cu can be obtained.