• Proprietary Selectro® Process delivers higher recoveries for HREE, LREE, scandium, and gallium
• HREE recoveries of 77-83% and LREE recoveries of 70-77%
• Scandium recovery of 80% and gallium recovery averaging 56%
• Process shows potential for broader application and lower environmental impact

Mount Ridley Mines Limited (ASX: MRD) announced the initial results from its metallurgical testwork program, demonstrating the potential of its proprietary Selectro® Process to recover heavy rare earth elements (HREE), light rare earth elements (LREE), scandium, and gallium from Grass Patch material. The Selectro® Process achieved HREE recoveries of 77-83%, LREE recoveries of 70-77%, scandium recovery of 80%, and gallium recovery averaging 56%, all materially higher than comparative hydrochloric acid (HCl) leach testing. The process also demonstrated lower reagent costs and a cleaner environmental profile. The results, achieved prior to beneficiation and process optimization, indicate significant potential for further improvement and commercial development.

The company anticipates further improvements in recovery rates and process efficiency as metallurgical testwork progresses.