提高广西某铅锌矿铅银回收率选矿试验研究

Experimental Study on Improving Recovery of Lead and Silver from a Lead-zinc Mine in Guangxi

针对广西某难选铅锌矿铅精矿中铅、银回收率较低的现状,研究通过工艺矿物学研究和对小型验证试验产出的锌精矿、铅粗精矿、铅中矿进行镜下检测和单体解离度分析,分析结果表明:铅粗精矿中的铅锌连生体含量过高是导致选矿指标较差的主要原因。研究在不改变现场生产原则流程和药剂制度的条件下对铅粗精矿进行再磨,在再磨细度为-0.037 mm占66.80%条件下,产出的铅精矿中铅、银回收率分别提高了8.89%、11.40%。

In view of the low recovery rate of lead and silver in lead concentrate from a refractory lead-zinc mine in Guangxi,the study analysed the small test output of zinc concentrate,lead concentrate and lead middlings for microscopic detection and monomer dissociation degree analysis through the study of process mineralogy. The results show that： the high content of Pb-Zn coenobium in lead rough concentrate causes poor processing performance. The regrinding of rough lead concentrate without changing the production principle,process and reagent system was conducted,under the condition of regrinding fineness-0. 037 mm of 66. 80%,the recovery of lead and silver in lead concentrates increased by 8. 89% and 11. 40%,respectively.