Separation of rare earth elements from contaminants and valuable components by in-situ precipitation during the hydrometallurgical processing of eudialyte concentrate
Adam Balinski, Oliver Wiche, Norman Kelly, Markus Andreas Reuter, Christiane Scharf
Hydrometallurgy | Elsevier | Published : 2020
Eudialyte – a sodium rich zirconosilicate – is often enriched in relevant amounts of Zr and Hf as well as other valuable metals such as rare earth elements (REEs), Mn and Nb. Due to its high solubility in mineral acids, all valuable components can be leached with high yields under mild conditions. The subsequent separation and purification of individual components from the resulting highly complex solutions can be challenging, especially due to the release of silica. This study deals with REE separation by in-situ precipitation during leaching of a thermally pre-treated H2SO4/eudialyte concentrate mixture. In contrast to common practice, the precipitation was undertaken before solid/liquid s..View full abstract
Awarded by BMBF (Federal Ministry of Education and Research, Germany)
This study was conducted within the framework of the SE-FLECX-project founded by the BMBF (Federal Ministry of Education and Research, Germany; project number: 033R132A). The authors thank Sabine Gilbricht (TU Bergakademie Freiberg) for supporting with mineral liberation analysis, Stefanie Schubert (Helmholtz Institute Freiberg for Resource Technology) for the chemical analysis of liquid phases and Niall O'Toole for proofreading.