Just the Facts: American Rare Earths achieves 10X rare earth upgrade at Halleck Creek
Published: 13:35 20 Feb 2025 AEDT
American Rare Earths (ASX: ARR | OTCQX: ARRNF and AMRRY) has successfully demonstrated a tenfold upgrade in rare earths concentration at its Halleck Creek Rare Earths Project in Wyoming, USA.
Large-scale metallurgical test work, conducted in collaboration with Mineral Technologies, confirmed that conventional, low-cost processing methods can efficiently upgrade the ore.
Testing upgraded mineralised feedstock from 3,438 ppm (0.34%) TREO to approximately 37,200 ppm (3.72%) TREO.
This process removes 93.5% of non-rare earth material early, leaving only 6.5% of mined ore for further refining, which is expected to reduce operating costs.
The test work utilised MG12 Spirals and Induced Roll Magnetic Separation, both commercially proven technologies.
These results validate the assumptions in the company’s scoping study and provide critical inputs for the pre-feasibility study (PFS).
Initial recovery rates were 62%, lower than the 78% outlined in the scoping study, however further test work is ongoing to optimise the flowsheet and improve efficiency.
An updated scoping study, incorporating the recent JORC resource increase, will be issued soon.
The company states that successfully demonstrating this upgrade at production scale is a key milestone that further de-risks the project as it moves toward development.
