湿法炼锌净化镍钴渣全湿法回收新工艺

New Recovery Process for Zinc Hydrometallurgy Ni-Co-Bearing Purification Slag

采用全湿法工艺浸出湿法炼锌净化镍钴渣，活化剂进行锌钴分离回收钴。结果表明，采用下述二段浸出工艺：温度70℃，反应时间1．5h，液固比4：1，一段浸出终点pH4．5～5．0，二段浸出终点pH〈0．5，锌浸出率大于98％以上，回收率95％以上。

Ni-Co-bearing purification slag from zinc hydrometallurgy was leached by full hydrometallurgy and Zi-Co was separated with activating agent to recover cobalt. The results show that the zinc leaching rate is above 98% with recovery rate of above 95% under the following optimum two-stage leaching processes including leaching temperature of 70 ℃, leaching time of 1.5 h, ratio of liquid to solid of 4： 1, pH of the end of first leaching stage of 4.5-5.0, pH of the end of second leaching stage of under 0.5.