Tetsu-to-Hagane
Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575

This article has now been updated. Please use the final version.

Recovery of Neodymium from Neodymium Magnet Using Bismuth
Atsushi IshigakiKeiji Okumura
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JOURNAL OPEN ACCESS Advance online publication

Article ID: TETSU-2018-037

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Abstract

Experiments were conducted to extract neodymium in bismuth by melting Fe-Nd-B magnets and bismuth together in a graphite crucible at 1200°C. Molten iron and bismuth separated into two phases, and neodymium in the magnet dissolved in the bismuth phase. Neodymium dissolved in bismuth was considered to form BiNd as a result of XRD. The neodymium concentration in iron phase after the dissolution treatment was 0.05 at.% or less,and the recovery rate was 99% and more. Compared to other metals(Mg, Ag, Cu) that separate into two phases with respect to molten iron, bismuth can be said to be a metal extraction material with a low melting point, safety and low energy cost.

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© 2018 The Iron and Steel Institute of Japan
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