Selective Leaching of Rare Earth Elements (REEs) from Eudialyte Concentrate after Sulfation and Thermal Decomposition of Non-REE Sulfates
Adam Balinski, Petya Atanasova, Oliver Wiche, Norman Kelly, Markus Andreas Reuter, Christiane Scharf
Minerals | MDPI AG | Published : 2019
Eudialyte, a sodium rich zirconosilicate, is one of the promising sources for REEs (rare earth elements), particularly for HREEs + Y (heavy rare earth elements and yttrium). The key challenge in hydrometallurgical processing is the prevention of silica gel formation and REE separation from resulting multi-element leach solutions. This study deals with the selective extraction of REE from eudialyte concentrate by selective roasting. In this method, metal ions are converted into sulfates, followed by the decomposition of non-REE sulfates in a roasting step and the water leaching of the calcine. The effect of acid addition, roasting temperature, roasting time, pulp density and leaching time is ..View full abstract
Awarded by Bundesministerium fur Bildung und Forschung
This research was financed by the r<SUP>4</SUP>-funding measure "Strategic raw materials-CalixarenesSelective solvent extraction of lanthanides and actinides by pre-organized calixarenes" of the Bundesministerium fur Bildung und Forschung (reference number: 033R132A).