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An Overview of Beneficiation and Hydrometallurgical Techniques on Eudialyte Group Minerals


The demand for rare earth elements for everyday technology and applications has initiated much research into the extraction and recovery of these rare earth elements. An otherwise unknown group of minerals, eudialyte is a zircon silicate consisting of rare earth oxides (REO), contained in a unique mineral structure and represented by a complex chemical formula. Research into extraction and recovery of rare earth elements involves various beneficiation and hydrometallurgical techniques. The goal of beneficiation being to efficiently liberate and upgrade the REO content, followed by hydrometallurgy to extract the desired elements. This overview will discuss previous research on treating eudialyte group minerals via different mineral processing and extraction techniques.

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This work was supported by 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. The research was funded through the Ames Laboratory, which is operated for the U.S. DOE by Iowa State University under contract no. DE-AC02-07CH11358.

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Correspondence to Victoria Vaccarezza.

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Vaccarezza, V., Anderson, C. An Overview of Beneficiation and Hydrometallurgical Techniques on Eudialyte Group Minerals. Mining, Metallurgy & Exploration 37, 39–50 (2020).

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  • Eudialyte
  • Rare earth elements
  • Beneficiation
  • Leaching
  • Gravity separation
  • Magnetic separation