Cristin-resultat-ID: 1260846
Sist endret: 13. januar 2016, 09:40
NVI-rapporteringsår: 2015
Resultat
Vitenskapelig artikkel
2015

Recovery of rare earth elements from permanent magnet scraps by pyrometallurgical process

Bidragsytere:
  • Yu-Yang Bian
  • Shu-Qiang Guo
  • Yu-Ling Xu
  • Kai Tang
  • Xiong-Gang Lu og
  • Wei-Zhong Ding

Tidsskrift

Xiyou jinshu
ISSN 1001-0521
e-ISSN 1867-7185
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2015

Importkilder

Scopus-ID: 2-s2.0-84937153253

Beskrivelse Beskrivelse

Tittel

Recovery of rare earth elements from permanent magnet scraps by pyrometallurgical process

Sammendrag

In order to recover valuable rare earth elements from Nd–Fe–B permanent magnet scraps, a high-temperature pyrometallurgical process was developed in this work. The magnet scraps were first pulverized and oxidized at 1000 °C in normal atmosphere. The oxidized mixtures were then selectively reduced by carbon in the temperature range of 1400–1550 °C. In this way, the rare earth elements were extracted to the form of oxides, whereas Fe and B were separated to metal phase. For improving the purity of rare earth oxides, the effects of temperature and reaction time on the reduction of B2O3 in oxide phase were investigated. It is found that increasing reaction temperature and extending reaction time will help the reduction of B2O3 contents in rare earth oxide phase. Almost all rare earth elements can be enriched in the oxide phase with the highest purity of 95 %.

Bidragsytere

Yu-Yang Bian

  • Tilknyttet:
    Forfatter
    ved Shanghai University

Shu-Qiang Guo

  • Tilknyttet:
    Forfatter
    ved Shanghai University

Yu-Ling Xu

  • Tilknyttet:
    Forfatter
    ved Shanghai University

Kai Tang

  • Tilknyttet:
    Forfatter
    ved Metallproduksjon og prosessering ved SINTEF AS

Xiong-Gang Lu

  • Tilknyttet:
    Forfatter
    ved Shanghai University
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