山西某铅锌银多金属矿选矿试验研究

Experimental Study on Beneficiation of a Polymetallic Pb-Zn-Ag Ore in Shanxi

对含铅0.48%、锌0.75%、银90.00 g/t的山西某铅锌银多金属矿进行了选矿试验研究。采用铅银混浮-锌浮选工艺,在磨矿细度-0.074 mm粒级占80%条件下,以水玻璃为调整剂、硫酸锌+亚硫酸钠为锌矿物抑制剂、BK906和BK903G为组合捕收剂、BK-201为起泡剂,优先选铅银,选铅银尾矿以石灰为调整剂、硫酸铜为活化剂、丁基黄药为捕收剂选锌,可获得铅品位27.54%、铅回收率76.47%、银品位5 252.5 g/t、银回收率73.03%、锌品位3.87%的铅银混合精矿和锌品位54.96%、锌回收率71.00%、银品位359.6 g/t的锌精矿。

A beneficiation test was conducted with a polymetallic Pb.Zn.Ag ore from Shanxi Province that containing 0.48% Pb, 0.75% Zn and 90.00 g/ t Ag. A process composed of lead.silver bulk flotation and zinc flotation was adopted, with grinding fineness of -0.074 mm 80%, with sodium silicate as the regulator, zinc sulfate and sodium sulfite as the inhibitor for zinc mineral, BK906 and BK903G as a combined collector for lead.silver minerals, BK.201 as the frother to preferentially concentrate lead.silver minerals, lime as the regulator for lead.silver flotation tailings, copper sulfate as the activator and butyl xanthate as the collector for zinc flotation. As a result, the experiment produced a lead. silver concentrate approaching 27.54% Pb grade at 76.47% recovery, 5 252.5 g/ t Ag grade at 73.03% recovery and 3.87% Zn grade, as well as a zinc concentrate grading 54.96% Zn and 359.6 g/ t Ag with zinc recovery rate at 71.00%.