|About this Abstract
||Part C-3: Processing of Critical Metals
||Radionuclide Removal from Ore and REE-bearing Minerals by Leaching and Ion Exchange Separation
||Nicolas Reynier, Laurence Whitty-Leveille, Maxime Courchesne, Cheryl Laviolette, Jean-Francois Fiset, Janice Zinck
|On-Site Speaker (Planned)
The separation of radionuclides during rare earth element (REE) production is an important requirement for a developing Canadian REE mining industry. Separation of actinides from REE is often a big concern in the rare earth industry because of the need to manage the radioactive nuclides. A patented process developed for actinides extraction from radioactive wastes was applied to REE ore. Objectives were to optimize the process for REE leaching from ore, and separate radioactive impurities from sulphuric and nitric liquor by ion exchange (IX). Ore leaching was optimized using a surface response plan to ensure statistical significance. In optimized conditions, solubilization yields ranged 90-95% for Th, 60-75% for U, 48-55% for LREE, and 59-75% for HREE in sulphuric and nitric media. Both media were compared for radionuclides removal from rich REE-bearing minerals liquor by IX. Actinides separation ranged 92-97% for Th and 69-96% for U in sulphuric and nitric media.
||Planned: At-meeting proceedings