Recovery of neodymium from a mixture of magnet scrap and other scrap

Osamu Takeda, Toru H. Okabe, Yoshiaki Umetsu

Research output: Contribution to journalConference articlepeer-review

81 Citations (Scopus)

Abstract

A novel neodymium (Nd) extraction process was devised and its feasibility was demonstrated in order to establish an environment-friendly process that combined scraps containing valuable metals. The newly developed device can simultaneously accomplish continuous extraction of Nd metal from scraps, re-extraction of magnesium (Mg) from Mg-Nd alloy, and finally, recovery of pure Mg. As a result, Nd metal of 98% purity was directly recovered from magnet scraps under certain conditions. Major process parameters, such as Mg/scrap mass ratio and extraction temperature, were investigated in order to evaluate the optimum conditions. The results of the investigated process indicated the possibility of extracting Nd metal directly from magnet scraps.

Original languageEnglish
Pages (from-to)387-390
Number of pages4
JournalJournal of Alloys and Compounds
Volume408-412
DOIs
Publication statusPublished - 2006 Feb 9
Externally publishedYes
EventProceedings of the Rare Earths'04 in Nara, Japan -
Duration: 2004 Nov 72004 Nov 12

Keywords

  • Extraction
  • Magnesium
  • Neodymium
  • Rare earth magnet scrap
  • Recycling

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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