Value analysis of neodymium content in shredder feed: toward enabling the feasibility of rare earth magnet recycling

Environ Sci Technol. 2014 Jun 17;48(12):6553-60. doi: 10.1021/es405104k. Epub 2014 Jun 5.

Abstract

In order to facilitate the development of recycling technologies for rare earth magnets from postconsumer products, we present herein an analysis of the neodymium (Nd) content in shredder scrap. This waste stream has been chosen on the basis of current business practices for the recycling of steel, aluminum, and copper from cars and household appliances, which contain significant amounts of rare earth magnets. Using approximations based on literature data, we have calculated the average Nd content in the ferrous shredder product stream to be between 0.13 and 0.29 kg per ton of ferrous scrap. A value analysis considering rare earth metal prices between 2002 and 2013 provides values between $1.32 and $145 per ton of ferrous scrap for this material, if recoverable as pure Nd metal. Furthermore, we present an analysis of the content and value of other rare earths (Pr, Dy, Tb).

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Automobiles
  • Electricity
  • Feasibility Studies
  • Ferrous Compounds / analysis
  • Magnets*
  • Neodymium / analysis*
  • Recycling*
  • Waste Products / analysis*

Substances

  • Ferrous Compounds
  • Waste Products
  • Neodymium