从广东某冶炼厂铅银渣中回收铅

Lead Recovery from Lead-silver Residues of a Smelting Plant in Guangdong

广东某冶炼厂将硫化锌精矿氧压酸浸—硫浮选后所得铅银渣的铅品位为17.55%,其中以硫酸铅形式存在的铅占总铅的89.74%。该铅银渣中铅嵌布粒度微细,-40μm粒级中铅分布率达到98.18%。为回收该铅银渣中有价金属铅,对其进行了选矿试验研究。结果表明:铅银渣经自来水清洗预处理后,以石灰为p H调整剂、水玻璃为脉石矿物抑制剂、CSY为捕收剂、松醇油为起泡剂,经1粗3精2扫铅浮选,获得了铅品位为50.28%、回收率为82.42%的铅精矿。试验取得了较好的分选指标,为该铅银渣的有效利用提供了技术依据。

There is 17. 55% lead in lead-silver residues made from a zinc sulfide concentrate of a smelting plant in Guangdong via oxygen pressure acid leaching and sulfur flotation process,89. 74% of the lead exists in form of lead sulfate.Lead is fine disseminated in lead-silver residues,98. 18% distributed in- 40 μm fraction. In order to recover the valuable metal lead in lead-silver residues,beneficiation experiments were conducted. The results showed that after treated by running water,using lime as a p H adjusting agent,sodium silicate as gangue inhibitors,CSY for the collector,alcohol oil as a foaming agent,through the flotation process of one roughing-three cleaning-two scavenging,lead concentrate with lead grade of 50. 28%and recovery 82. 42% was obtained. Good beneficiation test results had been obtained,which provide technique basis for reasonably use of the lead-silver residues.