REWAS 2019 pp 295-304 | Cite as

Rare Earth Magnet Recovery from Hard Drives by Preferential Degradation

  • Brandon OttEmail author
  • D. Erik Spiller
  • Patrick R. Taylor
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)


Neodymium recycling by the mineral processing practice of liberation and separation of hard disk drives is envisioned and evaluated. Magnetic material is liberated from the hard drive, constructed mostly of malleable metals, by preferential degradation of the brittle magnet material. The process developed is shown to recover greater than ninety-five percent of the magnet material with a product grade of over 80% magnet material by mass. The process is designed to co-produce stainless steel, aluminum, nickel alloy, carbon steel, and printed circuit board concentrates as contributors to the recycle value of hard drives.


Recycling RE magnets Rare earths Neodymium 



This work was completed with support from the Critical Materials Institute, an Energy Innovation Hub funded by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office.


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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  • Brandon Ott
    • 1
    Email author
  • D. Erik Spiller
    • 1
  • Patrick R. Taylor
    • 1
  1. 1.Kroll Institute for Extractive MetallurgyColorado School of MinesGoldenUSA

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