针对贫杂铅锌矿碱浸工艺,重点分析了浸出液中杂质元素Pb、Al、As的深度净化。实验结果表明:在净化温度为70℃、净化时间为90 min、陈化时间为48 h的条件下,采用Na2S可除去浸出液中82.3%的Pb;浸出液体中加入1g/L的硫酸铁,在恒温90℃搅拌1 h的条件下,浸出液中As的去除率21.1%;浸出液中加入1.5 g/L的硅酸钠,恒温90℃搅拌1 h的条件下,浸出液中Al的去除率39.9%。 Aiming at the leaching process of lean lead-zinc ore, the deep purification of Pb, Al and As in leachate is analyzed emphatically. The experimental results show that Na2S can remove 82.3% of Pb from the leachate under the condition of 70 ℃ purification temperature, 90 min purification time and 48 h aging time, and 1g / L ferric sulfate is added to the leaching liquid. The removal rate of As in the leachate was 21.1% under the condition of constant temperature of 90 ° C and 1 h of stirring. The removal rate of Al in the leachate was 39.9% when 1.5 g / L of sodium silicate was added to the leachate and stirred at 90 ° C for 1 h.