某氰化浸渣多金属综合回收工艺试验研究

Experimental research on the comprehensive polymetallic recovery from certain cyanide leaching tailings

针对某氰化浸渣中金属品位较低,铜、铅、锌的硫化物均有不同程度氧化,铅矿物氧化尤为严重且同时伴有过磨,次生铜矿物含量较高等影响多金属分离效果的难点,进行了充分的试验探索和全面的试验研究,实现了多金属的分离,并取得了良好的试验指标。氰化浸渣混合浮选—混合精矿铜、铅、锌、硫分离全流程闭路试验结果表明:铜、铅、锌、硫回收率分别为73.86%、45.61%、75.04%、84.12%,铜、铅、锌精矿中银累计回收率为70.80%,硫精矿中的金品位5.40 g/t、金回收率75.09%;产品均达到了合格产品要求。该研究为企业解决了技术难题,经济效益和环境效益显著。

The metal grade in certain cyanide leaching tailings is low.The copper,lead and zinc sulfides are to some extent oxidized,especially the lead mineral,which at the same time is with overgrinding.The secondary copper mineral content is relatively high.Aimed at solving these difficulties affecting polymetallic separation,exploratory and comprehensive experimental research is carried out,and has achieved polymetallic separation and good test index.The results whole flowsheet closed-circuit test of the bulk flotation of cyanide tailings-separation of copper,lead,zince and sulfur in mixed concentrates show that copper,lead,zinc and sulfur recovery is 73.86 %,45.61 %,75.04 % and 84.12 % respectively;accumulated silver recovery from copper,lead and zinc concentrates is 70.80 %;in the sulfide concentrates,gold grade is 5.40 g/t and gold recovery rate is 75.09 %;the products all meet the quality product requirement.The research solves the technical difficulties for enterprises and creates economic and environmental bene-fits.