| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for economically recovering valuable metals such as nickel, cobalt or rare earth elements contained in nickel-hydrogen secondary battery scrap. SOLUTION: Recovered active material obtained by crushing a used nickel- hydrogen secondary battery and performing physical separation such as sieving is dissolved while blowing gaseous chlorine in hydrochloric acid. Nickel, cobalt and rare earth elements are recovered into a solution, and manganese is selectively precipitated, so that nickel, cobalt and rare earth elements, and manganese are separately recovered.</p> |
