提高云南昭通地区铅锌矿铅锌回收率的工艺技术研究

Investigation of Mineral Processing on a Lead zinc Ore in Zhantong,Yunnan

对云南昭通地区铅锌矿选矿工艺进行了研究，该矿原矿含铅２％—５％，锌９％—１４％。原生产技术指标为铅精矿品位４１．９３％、回收率７２．３９％，锌精矿品位５１．２３％、回收率６９．６９％。通过对原矿性质的研究和选矿试验，确定了磨矿粒度为７０％－２００目，改变了生产工艺流程结构，并辅以合适的硫铁矿抑制剂，将原铅、硫分选后的硫精矿进一步扫选，回收部分铅，并增加了硫精矿中回收锌的作业，所得锌粗精矿并入锌精选作业，此工艺流程应用于生产的生产技术指标为：铅精矿品位４２．８０％、回收率８０．８８％，锌精矿品位５３．６４％、回收率８１．０７％。获得了显著的经济效益。

The run of mine in Zhaotong lead zinc mine contained Pb of 2%_5% and Zn of 9%_14%,lead and zinc concentrates obtained by using old flotation flowsheet contained Pb of 41.93% with the recovery of 72.39% and Zn of 51.23% with the recovery of 69.69% respectively.Based on the investigation of improving flotation conditions,an improved flowsheet including using a new depressant for pyrite was presented. Using the improved flowsheet,lead and zinc concentrates grades were reached to Pb of 42.80% with the recovery of 80.88% and zinc of 53.64% with the recovery of 81.07% respectively.