|About this Abstract
||Part C-3: Processing of Critical Metals
||Production of Separated Rare Earth Elements (REE) from a Quebec Deposit
||Jean-Francois Boulanger, Keven Turgeon, Claude Bazin, François-Olivier Verret, Dominic Downey
|On-Site Speaker (Planned)
The production of rare earth elements from ore usually consists of three steps; the separation of a concentrate of REE bearing minerals; the cracking of the REE minerals to liberate the REE into an aqueous solution and the possible separation of REE into individual elements. This paper describes the results of laboratory tests conducted on a carbonaceous REE ore containing bastnaesite and monazite. The tests cover the whole processing sequence of beneficiation, preparation of the REE solution using a caustic leach followed by acid leach to break monazite and bastnaesite and liberate REE into an aqueous solution and the separation of the REE using solvent extraction. Details on the product quality and process performances (recovery and impurities removal) are given for each studied steps. The concentration and distribution of various radioactive elements are provided to assess this known problem of the processing of rare earth bearing ores. The paper also discusses the economic advantage of separating the REE rather than producing a mixed REO product to be sold to a refinery for REE separation. A mini-pilot plant version of the process is currently planned.
||Planned: At-meeting proceedings