针对四川某铅锌银矿原选矿工艺不能适应矿石性质变化,而且在流程中使用氰化物的问题,对该矿矿石重新进行了浮选试验,结果表明:在-0.074 mm占85％的磨矿细度下,以石灰为调整剂、硫酸锌+亚硫酸钠为抑制剂、乙硫氮为捕收剂优先选铅,选铅尾矿以硫酸铜为活化剂、丁黄药为捕收剂选锌,可获得铅品位为51.80％、铅回收率为64.75％的铅精矿和锌品位为53.55％、锌回收率为91.83％的锌精矿,银在铅、锌精矿中的总回收率达到83.75％.试验不仅使铅、锌、银的回收率与现场工艺相比有明显提高,而且实现了铅锌无氰分离.%Aimed at the problems that the former beneficiation process can not adapt the nature of the ore and cyanide addition in the process for a lead-zinc-silver mine in Sichuan, another flotation test on this ore was made. The results showed that: under the grinding fineness of -0. 074 mm 85% , and with lime as adjusting agent, zinc sulfate + sodium sul-fite as inhibitor, diethyldithioc butyl xanthate as collector to concentrate zinc, lead concentrate with grade of 51. 80% and lead recovery of 64. 75% and zinc concentrate with grade of 53. 55% and recovery of 91. 83% were obtained separately. The total recovery of silver in lead and zinc concentrates reached 83. 75%. The tests realized higher recovery of lead, zinc and silver and adopted cyanide-free process, comparing with the on-site process.
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