The invention belongs to the field of recycling of valuable materials of waste
lithium-
ion batteries and particularly discloses a method for efficiently cleaning and recycling valuable
metal in a waste ternary
lithium-
ion battery. The method comprises the following steps that (1) the waste ternary LNCM
lithium-
ion battery is subjected to short-circuit discharging, disassembly, stripping through abinding agent and smashing screening to obtain an
electrode active material; the
electrode active material is subjected to reduction-acid leaching, and
solid-liquid separation is conducted to obtain acarbon material and an acid
leachate containing Li+, Ni2+, Co2+, Mn2+, Fe3+, Al3+ and Cu2+; (2) the pH of the acid
leachate is regulated and controlled within 3-5, and Fe3+ and Al3+ in the acid
leachate are precipitated; then through
solid-liquid separation,
impurity-removal filtrate with Li+, Ni2+, Co2+ and Mn2+ is obtained; (3) the pH of the
impurity-removal filtrate is adjusted to 1-6, then the filtrate is used as an
electrolyte and subjected to
rotational flow electrolysis, Cu / Co-Ni
alloy composite film is collected at a negative
electrode, and MnO2 is collected at a positive electrode. According to the method, a
rotational flow electrolysis mode is innovatively adopted, and effective components in the leachate is efficiently recycled.