Purification of Crude Nickel Sulfate Solution From Copper Electrorefining

The crude nickel sulfate is from copper electrorefining system.A combined process including recovery of copper by solvent extraction,removal of iron and arsenic by oxidation-hydrolysis precipitation,removal of calcium and magnesium by chemical precipitation,deeply purification by solvent extraction were reaseached for purifying the crude nickel sulfate solution.A pure nickel sulfate solution was obtained.After concentration and crystalizing,the crystalized nickel sulfate with good quality in accordance to HG/T 2824-2009 was obtained.