云南某含金银低品位硫化铅锌矿浮选试验

Flotation Experiment on a Low-Grade Lead-Zinc Sulfide Ore Containing Gold and Silver in Yunnan

云南某含金银硫化铅锌矿石铅品位为0.77%,锌品位为2.13%,并且伴生大量金、银等贵金属,金、银的嵌布粒度微细。为给该矿石开发利用提供依据,采用优先浮选硫化铅,选铅尾矿再选锌的优先浮选流程进行试验。结果表明:在磨矿细度为-0.074 mm占81.33%,以碳酸钠为pH调整剂,以硫酸锌+焦亚硫酸钠为抑制剂,以乙硫氮+3418A为捕收剂,经过2粗3精1扫选铅,选铅尾矿以硫酸铜+氯化铵为活化剂,以丁基黄药为捕收剂,经1粗2精1扫流程选锌,获得了铅精矿铅品位50.36%、金品位28.79 g/t、银品位965.47 g/t、铅回收率82.41%、金回收率77.18%、银回收率78.69%,锌精矿锌品位41.21%、锌回收率87.45%的指标,实现了矿石中有用金属的高效回收。

There is 0.77% Pb,2.13% Zn in gold-silver bearing lead-zinc sulfide ore in Yunnan. There is a large amount of precious metals such as gold and silver. The gold and silver have fine grain size. In order to provide a basis for the development and utilization of the ore, the preferential flotation lead sulfide process and lead tailings and selection zinc was carried out. The results show that the fineness of grinding is -0.074 mm accounting for 81.33%, sodium carbonate as pH adjuster, zinc sulfate + sodium metabisulfite as inhibitor, and ethyl sulfide nitrogen +3418A as collector, via two roughing three cleaning one scavenging lead flotation, lead tailings with copper sulfate + ammonium chloride as activator, butyl xanthate as collector, via one roughing two cleaning one scavenging zinc flotation process, obtained the lead concentrate with lead grade of 50.36%, gold grade is 28.79 g/t, the silver grade is 965.47 g/t, the lead recovery rate is 82.41%, the gold recovery rate is 77.18%, and the silver recovery rate is 78.69%. The zinc concentrate with zinc grade of 41.21% and zinc recovery rate is 87.45%, which realizes efficient recovery of useful metals in the ore.