by Greg Klein | October 19, 2015
A Colorado lab has maintained high grades while improving recoveries and simplifying processing for Commerce Resources’ (TSXV:CCE) Ashram rare earths project. Results announced October 19 bring the company closer to its goal of producing a saleable product at the lowest possible operating cost as Ashram moves towards pre-feasibility.
Recovery of the northern Quebec deposit’s rare earth elements increased from 71% to 76% at a high grade of 42% total rare earth oxides, Commerce stated. The lab also simplified the flowsheet by eliminating the secondary leach stage and consuming fewer reagents.
The tests used flotation concentrate that was produced during piloting, then bench-scale tested through the leach stage to remove carbonate minerals remaining after flotation, and then through the wet high intensity magnetic separation stage. The need for a second leach stage was eliminated, thereby simplifying the process.
Two weeks earlier Commerce announced its highest-grade concentrate so far, of 48.9% TREO at 63% recovery and 45.7% TREO at 71% recovery. The company has also been reporting high-grade, near-surface assays from winter drilling while the current drill program targets about 32 holes totalling 3,000 metres.
This month the company was honoured for its corporate social responsibility at the annual convention of l’Association de l’exploration minière du Québec.