西藏某富银铅锌矿浮选试验研究

Experimental Study on Flotation of a Silver-rich Pb-Zn Ore in Tibet

西藏某富银铅锌矿石铅品位为2.62%,锌品位为4.46%,伴生银品位为161 g/t。为开发利用该矿石,进行了优先浮铅—铅尾浮锌的优先浮选试验。结果表明,在磨矿细度-0.074 mm占80%条件下,以石灰为调整剂、亚硫酸钠和硫酸锌为抑制剂、乙硫氮和丁基黄药为捕收剂、A5为捕收-起泡剂,经1粗2精2扫选铅,浮铅尾矿以石灰为调整剂、硫酸铜为活化剂、丁基黄药为捕收剂、2#油为起泡剂,经1粗2精2扫浮锌,获得了铅精矿含铅49.06%、含银2842 g/t,铅回收率95.12%、银回收率89.67%,以及锌精矿含锌47.16%、锌回收率88.61%的浮选技术指标。伴生元素银以较高的回收率富集于铅精矿中,实现了资源的综合回收。

The lead grade of a silver-rich Pb-Zn ore in Tibet is 2.62%,the zinc grade is 4.46%,and the associated silver grade is 161 g/t.In order to develop and utilize the ore,the preferential flotation test of lead,and zinc flotation onlead tailings was carried out.The results show that under the conditions of grinding fineness of-0.074 mm accounting for 80%,lime is used as regulator,sodium sulfite and zinc sulfate are used as inhibitors,diethyl dithiocarbamate and butyl xanthate are used as collectors,and A5 is used as col⁃lector-foamer agent,by one roughing,two cleanings,two scavengings of lead flotation,lead concentrate with lead grade of 49.06%,silver content of 2842 g/t,lead recovery rate of 95.12%and silver recovery rate of 89.67%was obtained.Zinc concentrate with zinc content of 47.16%and zinc recovery of 88.61%was ob⁃tained by one roughing,two cleanings,two scavengings of zinc flotation using lime as regulator,copper sul⁃fate as activator,butyl xanthate as collector and 2#oil as foaming agent.The associated element silver is en⁃riched in lead concentrate with high recovery rate,which realizes the comprehensive recovery of resources.