广西某含银难选铅锌矿石选矿试验

广西某含银铅锌矿石铅氧化程度很高，各矿物共生关系密切，嵌布粒度较细，泥化较严重，属极难选氧化铅锌矿石。为确定该矿石的开发利用方案，对该矿石进行了选矿试验研究。结果表明，在磨矿细度为-0.074 mm占92%的情况下，采用1粗1扫2精选硫化铅、1粗1扫2精选锌、1粗2扫3精选氧化铅、中矿顺序返回流程，最终可获得铅品位为42.21%、含银1 682.67 g/t、铅回收率为41.40%、银回收率为37.28%的硫化铅精矿，锌品位为48.86%、含银242.00 g/t、锌回收率为78.56%、银回收率为21.69%的锌精矿，以及铅品位为48.27%、含银2 336.28 g/t、铅回收率为34.80%、银回收率为38.06%的氧化铅精矿，铅总精矿铅品位为44.77%、铅回收率为76.20%、银品位为1 959.83 g/t、银回收率为75.34%。试验指标较理想，可作为该矿石开发利用依据。

Experimental Study on a Refractory Silver-bearing Lead-zinc Ore of Guangxi

There is a silver-bearing lead-zinc ore with high oxidation rate，every mineral are closely associated with each other and fine disseminated，thus serious sliming，belongs to refractory oxidation lead-zinc ore.Beneficiation experiment was conducted in order to exploitation and utilization the ore.The results indicated that under the condition of the grinding fineness -0.074 mm accounted for 92%，utilize the flow of one roughing-two cleaning-one scavenging to float lead sulfide，one roughing-two cleaning-one scavenging to float zinc，and one roughing-three cleaning-two scavenging to float lead oxide，lead sulfide concentrate contain 42.21% Pb and 1 682.67 g/t silver，with lead recovery of 41.40% and silver recovery of 37.28%，zinc concentrate contain 48.86% Zn and 242.00 g/t silver，with zinc recovery of 78.56% and silver recovery of 21.69%，lead oxide concentrate contain 48.27% Pb and 2 336.28 g/t silver，with lead recovery of 34.80% and silver recovery of 38.06%，the total lead concentrate contain 44.77% Pb and 1 959.83 g/t silver，with lead recovery of 76.20% and silver recovery of 75.34%.The test index is relatively proper to be a basis for development and utilization of minerals.