福建某铅锌尾矿选锌试验

Experiments on Concentration of Zn from a Pb-Zn Tailing in Fujian

福建某铅锌矿选矿厂的早期尾矿中富含闪锌矿等,属优质二次资源,具有再回收价值。为确定合理的开发利用方案,对早期尾矿的代表性矿样进行了选锌工艺研究。结果表明:在试样再磨至-200目占90%的情况下,采用1粗3精2扫、中矿顺序返回流程处理,最终可获得锌品位为45.50%、回收率为67.05%的锌精矿;锌回收率不高的主要原因是试样中可浮性好的硫化锌仅占总锌的55.92%,其余锌赋存在难浮锌盐中。

There are plenty of sphalerite ,pyrite and pyrrhotite in early stage of a Pb-Zn tailing in Fujian. These miner- als belong to high-quality secondary resources ,and has recovery value. Study on the Zn concentration from representative sam- ples of early tailings were carried out. The results showed that under regrinding fineness of -200 mesh 90% for the sample ,Zn concentrate with Zn grade of 45.50% and zinc recovery of 67.05% was obtained by adopting the process of one roughing, three-cleaning,two-scavenging and middles hack to the flow-sheet in turn. The reason for difficulty in improving Zn recovery is that there are only 55.92% of Zn existing in floatable Zinc Sulfide, and the remains are in difficult-to-float Zinc salt.