| 简介 |
A method for recovering useful elements from a rare earth - transition metal alloy scrap, which comprises a step (A) of immersing the rare earth - transition metal alloy scrap in an aqueous solution of an ammonium salt of a mineral acid, a step (B) of passing a gas containing oxygen through said solution, to thereby oxidize the scrap and produce a precipitate comprising a powder containing oxides, hydroxides and the like as main components, a step (C) of separating said precipitate, and a step (D) of recovering rare earth elements from the separated precipitate. The method allows the economical and safe recovery of useful elements such as rare earth elements without the consumption of a large amount of acid and the need for the advance selection with respect to the form of a scrap or a preliminary crushing step. |
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