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Recycling of Rare Earth Elements (REEs) from Scrap Nd-Fe-B Magnets

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Rare Metal Technology 2023 (TMS 2023)

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

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Abstract

Nd-Fe-B magnets find wide range of applications due to its high magnetic properties. At its end-of-life, huge quantity of scrap Nd-Fe-B magnets are generated, which are promising alternative resource for rare earth elements (REEs). Recycling of scrap Nd-Fe-B magnets will mitigate the demand supply gap of REEs. Thus, the present paper reports development of feasible hydrometallurgical flow sheet to recover REEs from Nd-Fe-B magnets. The process consists of roasting of magnets with 20% NaCl at 750 °C for 2 h followed by water leaching of the roasted mass at 75 °C for 60 min to produce REEs containing leach liquor. About 99.9% REEs was recovered, and the left residue contained Fe, which was further calcined at 600 °C for 2 h to get red oxide pigment.

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Acknowledgements

The authors are thankful to Director, CSIR-National Metallurgical Laboratory, Jamshedpur, India, for kind permission to publish the paper.

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Authors and Affiliations

  1. Metal Extraction and Recycling Division, CSIR-National Metallurgical Laboratory, Jamshedpur, 831007, India

    Nityanand Singh, Pankaj Kumar Choubey, Rekha Panda & Manis Kumar Jha

  2. Convergence Research Center for Development of Mineral Resources, Korea Institute of Geoscience & Mineral Resources (KIGAM), Daejeon, 34132, South Korea

    Rajesh Kumar Jyothi

Authors
  1. Nityanand Singh
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  2. Pankaj Kumar Choubey
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  3. Rekha Panda
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  4. Rajesh Kumar Jyothi
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  5. Manis Kumar Jha
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Corresponding author

Correspondence to Manis Kumar Jha .

Editor information

Editors and Affiliations

  1. University of Tokyo, Tokyo, Japan

    Takanari Ouchi

  2. KTH Royal Institute of Technology, Stockholm, Sweden

    Kerstin Forsberg

  3. University of Toronto, Toronto, ON, Canada

    Gisele Azimi

  4. University of Saskatchewan, Saskatoon, SK, Canada

    Shafiq Alam

  5. Ind LLC, South Jordan, UT, USA

    Neale R. Neelameggham

  6. Pennsylvania State University, University Park, PA, USA

    Hojong Kim

  7. University of Ilorin, Ilorin, Nigeria

    Alafara Abdullahi Baba

  8. University of Queensland, Brisbane, QLD, Australia

    Hong Peng

  9. Pennsylvania State University, University Park, PA, USA

    Athanasios Karamalidis

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© 2023 The Minerals, Metals & Materials Society

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Cite this paper

Singh, N., Choubey, P.K., Panda, R., Jyothi, R.K., Jha, M.K. (2023). Recycling of Rare Earth Elements (REEs) from Scrap Nd-Fe-B Magnets. In: Ouchi, T., et al. Rare Metal Technology 2023. TMS 2023. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-22761-5_5

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