Critical Metals Corp. (Nasdaq: CRML) has reported a major advancement in metallurgical performance at its Tanbreez rare earth project in Greenland, confirming refined concentrate grades of 2.96% TREO and HREO – representing an approximate 40% increase over the historical 2.1% TREO results recorded in 2016. The new testwork, completed in 2025 at Fremantle Metallurgy in Western Australia and overseen by independent consultant Emeritus Professor Tony Tang, successfully replicated and materially improved upon earlier results using a duplicate ore sample from the original AMTEC/ALS study.
The updated flowsheet incorporates a simplified, high‑efficiency magnetic separation process enhanced by permanent magnets operating at 10,000-12,000 gauss, delivering recovery rates exceeding 85%. Modifications to the primary magnetic stages enabled more effective rejection of non‑magnetic material and generated a higher‑grade eudialyte concentrate. The process also confirmed the recovery of all eight significant in‑demand rare earth elements, including heavy rare earths, along with strategic rare metals.
Tony Sage, chairman of Critical Metals Corp., commented, “Given these outstanding results, the current flowsheet announced in the previously released PEA is now obsolete. A replacement PEA will be issued confirming pilot plant concentrate production results approximately three months before the Company releases a revised DFS. This represents a significant milestone for the Tanbreez development as the project transitions from laboratory‑scale testing to pilot plant operations, scheduled to commence in May 2026.”
Sage added that the testwork supports offtake partners in the EU, Saudi Arabia and the United States, all of whom will receive at least 10 tonnes of high‑grade pre‑production eudialyte concentrate for refining development.
Following the successful laboratory and pilot‑scale testing, Critical Metals is preparing to launch field activities in Greenland, including drilling and the collection of a 150‑tonne bulk sample planned for June 2026. This material will feed the pilot plant and further validate processing pathways for consistent production of TREO and metal oxide concentrates.
CRML stated that the improved flowsheet and enhanced recovery rates reinforce the technical and commercial potential of Tanbreez as one of the world’s most strategically significant rare earth projects.
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