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我厂处理铅锌硫多金属矿石,矿石富含银。自投产以来,一直沿用氰化物抑制锌浮选铅的优先浮选工艺。氰化物用量较大,一般在200(克/吨)左右, 1975年用量高达339(克/吨),尾矿含氰化物4.47(毫升/升)、严重污染环境,被国家列为1979年限期治理的167项重点单位之一;同时,伴生金银受其溶解而部分流失,伴生低品位铜的回收也受到限制。多年来,我们在试用碳酸钠+硫酸锌、硫酸亚铁、亚硫酸法及硫代硫酸盐直接取代
Our factory deal with lead, zinc and sulfur multi-metal ore, ore is rich in silver. Since put into production, cyanide has been used to suppress zinc flotation lead preferential flotation process. The amount of cyanide used is large, generally around 200 (g / t), with the dosage up to 339 (g / t) in 1975 and 4.47 (ml / l) containing cyanide, which seriously pollute the environment and are listed by the state as 1979 deadline Governance of one of the 167 key units; at the same time, accompanied by the dissolution of gold and silver part of the loss, accompanied by the recovery of low grade copper is also limited. Over the years, we have tried sodium carbonate + zinc sulfate, ferrous sulfate, sulfurous acid and thiosulfate direct replacement