Scholarlink

As the global demandMagnetic materials for clean energy technologies surgesPermanent magnets, the need for sustainable sources of rare earth elementsRare earth elements (REEs) has become increasingly urgent. Neodymium, praseodymium, and dysprosium, vital components in electric vehicles and wind turbines, face supply risks due to the concentrated nature of their mining and refining. This study delves into the recyclingRecycling of NdFeB magnetsNdFeB magnets, exploring liquid metal leachingLeaching using liquid magnesium as the extractionExtraction agent. Through experimental approaches such as demagnetization, and stirring during leachingLeaching, with filtration using zirconia ceramic foam filters, we successfully separated and recovered high-purity Mg-RE from magnetMagnets scrap with no measurable Fe impurities. Post-filtration, distillation can be done using a combination of gravity-driven multiple effect thermal system (G-METS) with conventional vacuum distillationVacuum distillation. G-METS distillation has the potential to improve the efficiency of rare earthRare earth metal extractionExtraction, hence contributing to the establishment of a sustainable supply chain for rare earthRare earth magnetsMagnets.

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Recycling Rare Earth Permanent Magnets via Liquid Magnesium Leaching and Distillation

  • 会议论文

  • 发表日期：

    2025年

查看全文
  • Emmanuel Opoku,
  • Chinenye Chinwego,
  • Adam C. Powell,
  • Brajendra Mishra

摘要

As the global demandMagnetic materials for clean energy technologies surgesPermanent magnets, the need for sustainable sources of rare earth elementsRare earth elements (REEs) has become increasingly urgent. Neodymium, praseodymium, and dysprosium, vital components in electric vehicles and wind turbines, face supply risks due to the concentrated nature of their mining and refining. This study delves into the recyclingRecycling of NdFeB magnetsNdFeB magnets, exploring liquid metal leachingLeaching using liquid magnesium as the extractionExtraction agent. Through experimental approaches such as demagnetization, and stirring during leachingLeaching, with filtration using zirconia ceramic foam filters, we successfully separated and recovered high-purity Mg-RE from magnetMagnets scrap with no measurable Fe impurities. Post-filtration, distillation can be done using a combination of gravity-driven multiple effect thermal system (G-METS) with conventional vacuum distillationVacuum distillation. G-METS distillation has the potential to improve the efficiency of rare earthRare earth metal extractionExtraction, hence contributing to the establishment of a sustainable supply chain for rare earthRare earth magnetsMagnets.