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The transition to green energy technologies has led to an increased demand for rare earthRare earth metals, particularly neodymiumNeodymium and praseodymium. These metals are essential for manufacturing rare earthRare earth magnetsMagnets, which are integral components of electric motors in electric vehicles and wind turbines. Metallothermic reductionMetallothermic reduction of metal halides offers an economical and sustainable alternative for producing these metals, minimizing waste generation compared to electrolytic methods. However, the key challenges in metallothermic reductionMetallothermic reduction are the production of anhydrous rare earthRare earth metal salts and salt/metal phase separation after reduction. This study explores various methods to produce oxide-free anhydrous rare earthRare earth halides, their subsequent reduction to metals using sodiumSodium as the reducing agent, and phase separation using low-melting eutectic systems. The research delves into the process thermodynamics and chemistry to elucidate the physicochemical transformations involved in producing magnetMagnet-grade Nd-Pr metals.

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Rare Earth Metal Production Through Metallothermic Reduction: Preparation of Anhydrous Salt and Reduction Using Sodium Metal

  • 会议论文

  • 发表日期：

    2025年

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  • Himanshu Tanvar,
  • Diana Aksenova,
  • Jared Gordon,
  • Richard VanLieshout,
  • Philip Keller,
  • Brock O’Kelley,
  • Andrew Matheson,
  • Jon Siddall,
  • Brajendra Mishra

摘要

The transition to green energy technologies has led to an increased demand for rare earthRare earth metals, particularly neodymiumNeodymium and praseodymium. These metals are essential for manufacturing rare earthRare earth magnetsMagnets, which are integral components of electric motors in electric vehicles and wind turbines. Metallothermic reductionMetallothermic reduction of metal halides offers an economical and sustainable alternative for producing these metals, minimizing waste generation compared to electrolytic methods. However, the key challenges in metallothermic reductionMetallothermic reduction are the production of anhydrous rare earthRare earth metal salts and salt/metal phase separation after reduction. This study explores various methods to produce oxide-free anhydrous rare earthRare earth halides, their subsequent reduction to metals using sodiumSodium as the reducing agent, and phase separation using low-melting eutectic systems. The research delves into the process thermodynamics and chemistry to elucidate the physicochemical transformations involved in producing magnetMagnet-grade Nd-Pr metals.