Patent ID: 9203126
Filing Date: 2015-12-01
Classification: C21B,C22B,H01M,Y02P,Y02W

Abstract:
1. A method for recovering valuable metals from waste batteries containing aluminum and iron, the method comprising: a melting step of melting the waste batteries and thereby obtaining a melt; a slag separation step of separating slag from the melt; and an alloy separation step of separating an alloy of valuable metals from the melt, wherein in the melting step, silicon dioxide and calcium oxide are added as fluxes, a content of aluminum oxide in the slag is more than or equal to 5% by mass and less than 20% by mass, and a content of iron in terms of metallic iron in the slag is from 25.2% by mass to 40% by mass, and the melting step is carried out at a temperature of 1400° C. or lower.