我矿铅锌小选厂,地处农村。浮选尾矿水未作处理。自1970年投产以来,未使用氰化物,而只用单一的硫酸锌来分选铅锌,但在选铅循环是采用毒性较大的黑药为主的混合药剂。去年由于黑药供应不上,针对这一情况,并为进一步减少污染,自去年下半年以来,我们改进了药剂制度,选铅循环不用黑药,只用乙基黄药作捕收剂。经过多次试 I mine small lead-zinc plant, is located in rural areas. Flotation tailings water untreated. Since it was put into production in 1970, cyanide has not been used, and only zinc sulfate has been used for the sorting of lead and zinc, but in the lead-selective cycle, the toxicant-based black drug-based compounding agent is used. Last year, due to the non-availability of black drugs, in response to this situation and in order to further reduce pollution, we have improved the pharmaceutical system since the second half of last year. Drug-selective cycles are free of black drugs and only ethyl xanthate is used as a collector. After many tests