Archives of Metallurgy and Materials

Institute of Metallurgy and Materials Science of Polish Academy of Sciences
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EFFECT OF Mg RATIO ON THE EXTRACTION OF Dy FROM (Nd,Dy)-Fe-B PERMANENT MAGNET USING LIQUID Mg

  • SANGMIN PARK (KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY, KOREA INSTITUTE FOR RARE METALS, UNIVERSITY OF SCIENCE AND TECHNOLOGY) ;
  • SUN-WOO NAM (KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY, KOREA INSTITUTE FOR RARE METALS, UNIVERSITY OF SCIENCE AND TECHNOLOGY) ;
  • JU-YOUNG CHO (KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY, KOREA INSTITUTE FOR RARE METALS, UNIVERSITY OF SCIENCE AND TECHNOLOGY) ;
  • SANG-HOON LEE (KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY, KOREA INSTITUTE FOR RARE METALS, UNIVERSITY OF SCIENCE AND TECHNOLOGY) ;
  • SEUNG-KEUN HYUN (INHA UNIVERSITY) ;
  • TAEK-SOO KIM (KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY, KOREA INSTITUTE FOR RARE METALS, UNIVERSITY OF SCIENCE AND TECHNOLOGY)
  • Published : 20200000
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Abstract

Recently, since the demand of rare earth permanent magnet for high temperature applications such as an electric motor has increased, dysprosium (Dy), a heavy rare earth element, is becoming important due to severe bias in its production. To fulfill the increasing need of Dy, recycling offers as a promising alternative. In recycling of rare earths, Hydro-metallurgical extraction method is mainly used however it has adverse environmental effects. Liquid metal extraction on the other hand, is an eco-friendly and simple method as far as the reduction of rare earth metal oxide is concerned. Therefore, liquid metal extraction was studied in this research as an alternative to the hydro-metallurgical recycling method. Magnesium (Mg) is selected as solvent metal because it doesn't form intermetallic compounds with Fe, B and has a low melting and low boiling point. Extraction behavior of Dy in (Nd,Dy)-Fe-B magnet is observed and effect of Mg ratio on extraction of Dy is confirmed.

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Acknowledgement

This research was supported by a grant from project of development of environment friendly pyro-metallurgy process for high purity HREE and materialization (Project number : 20000970) by Korea evaluation Institute of Industrial Technology(KEIT) in Republic of Korea.