| abstract |
PROBLEM TO BE SOLVED: To provide a method for recovering a metal from a waste lithium ion battery having the advantages of the physical separation method and the chemical dissolution purification method. SOLUTION: Used waste lithium-ion batteries are baked in a high temperature oven to decompose and remove the organic electrolyte, crushed and sieved, the sifted material is selected with a magnet, and the eddy current is subjected to a sorting process to obtain a crushed iron shell. , Copper foil and aluminum foil, etc. are separated, the sieved material is dissolved and filtered, and by controlling the pH value and electrolysis conditions, metallic copper and cobalt are electrolytically deposited by a diaphragm electrolysis method, respectively, and the cathode is used in the electrolysis process. The acid formed on the side is recovered in the diffusion dialysis process and recycled back to the lysis step for use to form one close step. After the electrolysis, the solution rich in lithium ions can adjust the pH value to precipitate metal impurities, and then add a carbonate group to form a high-purity carbonate of lithium and recover lithium. |