剪切絮凝浮选工艺回收氰化尾渣中铜铅锌试验研究

Experimental research on copper,lead and zinc recovery from cyanide tailings residue by shear-flocculation flotation

氰化尾渣中通常含有铜、铅、锌等有用金属,具有回收价值。以山东某金矿氰化尾渣为研究对象,通过化学多元素分析、物相分析、粒度分析、矿物组成分析、单体解离度分析对氰化尾渣进行了工艺矿物学研究,结果表明:氰化尾渣粒度微细,-0.038 mm粒级占91.23%,铅、铜、锌矿物主要为方铅矿、黄铜矿、闪锌矿,脉石矿物主要为石英。根据矿石性质确定采用“优先选铅-破氰-剪切絮凝选铜-破氰-剪切絮凝选锌”工艺综合回收铅、铜、锌矿物,分别进行了条件试验,确定了最优药剂用量。闭路试验得到铅精矿铅品位25.89%、铅回收率77.67%,铜精矿铜品位17.89%、铜回收率66.45%;锌精矿锌品位42.55%、锌回收率75.00%的良好指标。

Valuable metals that are worth recovering such as copper,lead and zinc are often contained in cyanide tailings.In the case study of cyanide tailings residue in a gold mine in Shandong,mineralogical study on the cyanide tailings residue is carried out in terms of chemical multi-element analysis,physical phase analysis,particle size analysis,mineral compositions analysis,monomer dissociation degree analysis.The results show that the cyanide tailings resi-due particle is microfine,with-0.038 mm accounting for 91.23%,and the minerals of lead,copper and zinc are galena,chalcopyrite and sphalerite,gangue minerals are mainly quartz.According to the ore property,it is decided that"preferential lead separation-cyanide breaking-shear-flocculation copper separation-cyanide breaking-shear-flocculation zinc separation"process be used to comprehensively recover lead,copper and zinc minerals.Conditional tests are carried out separately to decide the optimal reagent dosage.Closed-circuit test can obtain lead concentrate with lead grade 25.89%,lead recovery rate 77.67%;copper concentrate with copper grade 17.89%,copper recovery rate 66.45%;zinc concentrate with zinc grade 42.55%,zinc recovery rate 75.00%,which are good indexes.