METHOD FOR RECYCLING IRON AND ALUMINUM IN NICKEL-COBALT-MANGANESE SOLUTION

The present invention relates to a method for recycling iron and aluminum in a nickel-cobalt-manganese solution. The method comprises the following steps: leaching a battery powder and removing copper therefrom to obtain a copper-removed solution, and adjusting the pH value in stages to remove iron and aluminum, so as to obtain a goethite slag and an iron-aluminum slag separately; mixing the iron-aluminum slag with an alkali liquor, and heating and stirring same to obtain an aluminum-containing solution and alkaline slag; and heating and stirring the aluminum-containing solution, introducing carbon dioxide thereto and controlling the pH value to obtain aluminum hydroxide and an aluminum-removed solution. According to the method of an embodiment of the present invention, iron and aluminum in the solution can be effectively removed, and at the same time, the iron and aluminum are recycled, the resource recycling rate can be effectively increased, the process is reasonable, the cost is low, the environmental pollution is small, generated by-products can be returned to the process flow, no hazardous waste residues are discharged into a process system of the present invention, and the method has good economic benefits and social benefits.