An experimental study on the comprehensive recovery of valuable metals such as Zn and Co from organic cobalt waste slag produced from zinc smelting was carried out by roasting→selective zinc leaching→cobalt leaching→cobalt chlo-ride solution purification→evaporation crystallization.The process of recovering organic cobalt residue is short and easy to operate and control,and zinc sulfate solution and cobalt chloride products are obtained.In order to promote the decomposi-tion of organic matter and the conversion of Zn and Co into oxides,especially the conversion of Co into Co(Ⅲ)oxides,the material should be turned many times,and there is enough air to ensure that the valuable metal is fully oxidized;Oxidizing agent should be added to increase the potential of the solution to inhibit the leaching of Co and realize the separation of Zn and Co.It is necessary to control the pH value of the solution accurately to improve the impurity removal rate and Co recov-ery.
关键词
Co/锌钴分离/硫化除杂/CoCl2/ZnSO4溶液
Key words
Co/zinc-cobalt separation/vulcanization for impurity removal/CoCl2/ZnSO4 solution
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