草酸钴废料协同浸出水钴矿中的钴和铜

利用草酸钴废料协同浸出水钴矿中的钴和铜，考察了工艺条件对浸出率的影响，并推荐了一种二段浸出及后续生产草酸钴的工艺流程。实验结果表明，在草酸钴废料与水钴矿的质量比为20%、反应时间为120 min、反应温度为85 ℃、初始H2SO4浓度为1.00 mol/L、液固比为4 mL/g的最佳工艺条件下，钴和铜的浸出率分别达到98.82%和96.24%。该工艺应用于水钴矿的还原浸出，在回收利用草酸钴废料的同时，降低了还原剂的消耗，且对浸出液后续处理工艺无影响。

Synergistic leaching of cobalt and copper from heterogenite with cobalt oxalate waste

Cobalt and copper in heterogenite were synergistic leached with oxalate cobalt waste. The effects of process conditions on leaching rate were investigated，and a process of two-stage leaching with subsequent cobalt oxalate production was also recommended. The experimental results showed that the leaching rate of cobalt and copper was 98.82% and 96.24% respectively，under the optimum conditions of mass ratio of oxalate cobalt waste to heterogenite 20%，reaction time 120 min，reaction temperature 85 ℃，initial H2SO4 concentration 1.00 mol/L and liquid-solid ratio 4 mL/g. When this process was applied in reduction leaching of cobalt and copper from heterogenite，cobalt oxalate waste was recycled，the consumption of the reducing agent was reduced，and there was no effect on subsequent treatment processing of the leaching liquid.