NICKEL REMOVAL METHOD FROM COPPER REMOVAL ELECTROLYTIC SOLUTION

摘要

PROBLEM TO BE SOLVED: To provide a nickel removal method from a copper removal electrolytic solution capable of efficiently exhausting a condensed copper removal electrolytic solution.SOLUTION: A method for collecting a crude nickel sulfate comprises: condensing a copper removal electrolytic solution obtained by removing copper contained from an electrolytic solution used for electrorefining the copper, in a concentration tank 10 to precipitate the crude nickel sulfate; and exhausting the obtained slurry from the concentration tank 10 to perform solid-liquid separation. The slurry in the concentration tank 10 is stirred and exhausted by intermittently increasing a supply amount of the copper removal electrolytic solution to the concentration tank 10. The condensed copper removal electrolytic solution precipitated in the bottom of the concentration tank 10 can be efficiently exhausted.