Through the experimental study of nickel sulfate solution of a company,the liquid-liquid extraction of Fe3+,Zn2+and Ni2+ was carried out by using P204 as extractor.The extraction rate of Fe3+ was more than 85％,and the extraction rate reached 90％.The extraction rate of Zn2+ can be 93％,the reverse extraction rate is more than 90％,Ni2+ is basically not extracted,and the recovery rate can reach more than 98％.By comparing the results of the back-extraction test of sulfuric acid and hydrochloric acid,the three-stage continuous extraction test using P204 as extractant for back-extraction of Fe and Zn was more than 98％.
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