American Rare Earths Limited (ASX:ARR)

American Rare Earths Limited (ARR) has successfully completed its first phase of impurity removal testing on Halleck Creek ore, achieving significant milestones in the mineral processing program. The tests focused on removing non-rare earth elements like iron, aluminum, silica, and others from leachate solutions using magnesium oxide (MgO) as the optimal neutralizing agent. This reagent was found to be cost-effective and efficient, leading to minimal formation of problematic by-products such as gypsum and silica gel, which have historically posed challenges in processing allanite-based rare earth elements. The impurity removal testing involved primary and secondary neutralization steps, successfully precipitating undesirable elements while maintaining high rare earth element recovery rates. These results are pivotal for the pre-feasibility study and future steps in the hydrometallurgical processing, including the production of rare earth oxides crucial for permanent magnets.