某复杂铜铅锌多金属矿选矿试验

Experimental Study on Mineral Processing of a Complex Copper-Lead-Zinc Multi-Metal Minerals

针对某复杂铜铅锌多金属矿的性质特点,采用弱磁选脱硫—铜铅混浮—混合精矿铜铅分离—混浮尾矿选锌的原则流程对该矿石进行选矿试验研究。在矿石磨矿细度为-0.074 mm占90%的情况下,采用1次弱磁选选硫、1粗2精2扫铜铅混浮、1粗2精1扫铜铅分离、1粗3精2扫选锌、中矿顺序返回流程处理该矿石,最终获得了铜品位为24.79%、铜回收率为55.78%的铜精矿,铅品位为51.34%、铅回收率为83.55%的铅精矿,锌品位为45.63%、锌回收率为62.71%的锌精矿,硫品位为35.12%、硫回收率为80.08%的硫精矿。铜精矿含银229.53g/t,铅精矿含银196.20 g/t,铜、铅精矿中银的总回收率为50.29%。

According to the characteristics of Copper-Lead-Zinc Multi-Metal Minerals, beneficiation tests is made by adopting the principle flow-sheet of desuphurization magnetic separation-copper-lead mixed beneficiation-eopper-lead sepa- ration from rough mixed concentrate-zinc concentration from mixed tailings. Under the grinding fineness of - 0. 074 mm 90% , the final copper concentrate with Cu grade of 24.79% and recovery of 55.78% , lead concentrate with Pb grade of 51.34% and recovery of 83.55 % , zinc concentrate with Zn grade of 45.63 % and recovery of 62.71% , Sulfur concentrate with S grade of 35.12% and the recovery of 80.08% , were obtained respectively through the process of sulfur concentration by one low intensity magnetic separation, copper-lead mixed flotation by one-roughing, two-cleaning and two-scavenging, copper-lead separation by one-roughing, two-cleaning and one-scavenging, zinc concentration by one-roughing, three-clean- ing and two-scavenging, and middles back to the flow sheet in order. Copper concentrate contains silver of 229.53 g/t, and lead concentrate contains silver of 196.20 g/t. Total silver recovery from copper and lead concentrates reached 50.29%.