| abstract |
The present invention provides a method for recovering metal from scrap that can be carried out at a low cost with reduced man-hours. One or two or more types selected from Ni, Co, and Mn, comprising Li and containing a concentrate of a positive electrode material separated and recovered from a waste lithium ion battery and / or a positive electrode material for a lithium ion battery The powder or granule-containing scrap containing selenium is mixed in an electrolytic solution composed of an aqueous solution of an inorganic compound containing a mineral acid, and electrolysis is performed in a suspended state in which the scrap is dispersed in the electrolytic solution. (A) a step of electrodepositing at least one metal component of Ni, Co and Ni-Co alloy on the cathode by electrolysis, (b) a step of electrodepositing Mn oxide on the anode, (c) Mn in the electrolyte Including the step (a) when the scrap contains Ni and / or Co, and includes the steps (b) and (c) when the scrap contains Mn. Collect metal contained in scrap. [Selection] Figure 1 |