Development of recycle system for direct leaching and winning process of Nd and Dy in molten salts from magnets

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This study is the development of recycling technology of rare earth elements from the neodymium magnet scrap and used one from the point of view of securing a stable supply of rare earth elements such as Dy and Nd in neodymium magnets (Fe-Nd-B alloy). By leaching Dy and Nd from waste magnet into the molten salts at 723 K selectively, Fe-B alloy is collected as a solid, on the other hand, Nd and Dy are recovered as metal on the cathode by molten salts electrolysis.Excluding the main component (Li, K, Cl) of the molten salts, rare earth elements in the molten salts was 98% or more, and iron was 2% or less. Rare earth elements were selectively leached. After electrolysis in this molten salts, the deposition, whose purity of the rare earth element was 95% or more, was obtained on the cathode.