Extraction and Separation of Cu and Co from Low Concentration Cobalt Sulfide Concentrate Leaching Solution
P204 was used to extract copper and cobalt from low concentration cobalt sulphide concentrate leaching solution.The effects of pH of extraction solution,extractor concentration,extraction ratio and time on the extraction efficiency were investigated.The results show that under the conditions of pH=4,P204 volume fraction of 25％,extraction ratio VO/VA=1/1,extraction time of 3 min,reverse extractant sulfuric acid concentration of 0.10 mol/L,and reverse extraction ratio VO/VA=2/1,the test of two-stage countercurrent extraction,four-stage countercurrent stripping is carried out on the purified liquid of cobalt sulfide concentrate,the mass concentration of cobalt and copper in the raffinate is 338.80 mg/L and 2.96 mg/L,the extraction rate of copper is 98.32％,and 90.03％of cobalt remains in the water phase.Copper and cobalt can be effectively further separated by stripping,which is conducive to preparation of high purity cobalt sulfate.
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