| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for recovering cobalt from a spent secondary battery by which a cobalt as a rare metal is efficiently recovered from a spent secondary battery by the use of acid in an amt. as small as possible. SOLUTION: A spent secondary battery contg. cobalt in its electrode material is roasted at >=600 deg.C, the roasted battery is cut to pieces, and the pieces are screened into metallic scraps and roasted ash. A cobalt-contg. material is magnetically separated from the ash with a magnet, and the cobalt-contg. material is dissolved in an acid to recover cobalt from the acid soln.</p> |
