某高硫铅锌矿石选矿试验

某高硫铅锌矿石中磁黄铁矿和黄铁矿含量大、铅锌嵌布关系复杂、嵌布粒度细等，以新药剂BK-509和BK-512抑制硫化铁矿物，采用磁选-铅锌依次优先浮选工艺进行了铅、锌、硫分离试验。结果表明，矿石在磨矿细度为-0.074 mm占90%的情况下，经1粗1精弱磁选、2粗2扫浮选选铅、铅粗精矿再磨至-0.043 mm占85%情况下4次精选、铅扫选尾矿1粗2扫选锌、锌粗精矿再磨至-0.043 mm占90%情况下4次精选，获得了铅品位为56.71%、回收率为76.85%的铅精矿，锌品位为45.98%、回收率为75.57%的锌精矿。试验的铅、锌精矿指标理想，可作为铅锌回收工艺流程设计的依据。

Experimental Research on Mineral Processing of Pb-Zn Ore with Large Contents of Sulphide

Based on the feature of high contents of pyrrhotite and pyrite,complex dissemination of lead and zinc and fine dissemination,with the use of two kinds of new iron sulphide minerals depressants,BK-509 and BK-512,a new processing tech-nology of lead,zinc and sulfur separation is made by were developed by magnetic separation-lead zinc selective flotation. The results showed that under grinding fineness of -0. 074 mm 90%,lead concentrate assaying 56. 71% Pb with lead recovery of 76. 85%,and zinc concentrate assaying 45. 98% Pb with zinc recovery of 75. 57% were obtained by the process of one roug-hing-one cleaning low intensity magnetic separation,and two roughing-two cleaning lead flotation,and under lead rough concen-trate's grinding fineness of -0. 043 mm 85% four scavenging,and one roughing-two cleaning zinc flotation,and under zinc rough concentrate's grinding fineness of -0. 043 mm 90% four scavenging. The test index was ideal and the process could be used as the designing references of lead-zinc recovery process.