Koppamurra metallurgical test work progressing well
Summary
Highlights:
Successful Mixed rare earth oxide (MREO) production: 1,800L of Pregnant Leach Solution (PLS), produced from ~3-tonne heap leach testwork, has delivered ~34kg of MREO, an intermediate step to producing a Mixed Rare Earth Carbonate (MREC).
Flexible processing pathway: Results confirm significant reduction in material moving through downstream processes, providing potential for streamlined production of a MREC.
High magnet rare earth (MRE) recoveries: MRE recoveries of 99% achieved through simple, low-cost direct precipitation from PLS to MREO.
Strong basis for cost efficient processing: Intermediate step potentially reduces equipment size and reduces cost required for downstream Impurity Removal (IR) and MREC production.
Next steps: Additional testwork, including optimising the intermediate MREO re- dissolution and impurity removal steps will enhance the production of a high-quality MREC, with results to inform the Pre-Feasibility Study (PFS).
Government Co-Funding Grant: Testwork program is co-funded under the $5 million Australian Government grant from the International Partnerships in Critical Minerals Program.
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