Abstract:Integrated leaching of nickel-cobalt-manganese ternary precursor waste and nickel sulfide waste was studied. The experimental results show that recovery of manganese in nickel-cobalt-manganese ternary precursor waste and utilization of nickel sulfide waste is 99.89% and 92.60% respectively under the optimum conditions including mass ratio of nickel sulfide waste to nickel-cobalt-manganese ternary precursor waste of 1/5, initial acidity of reaction of 4 mol/L, reaction temperature of 90 ℃, L/S of 4, and reaction time of 6 h. The residue can be used for leaching nickel-cobalt-manganese ternary precursor waste as reductant. The objective of integrated leaching of nickel-cobalt-manganese ternary precursor waste and nickel sulfide waste is realized without any other additional oxidant or reductant.