Global Atomic Announces Successful Completion of Dasa Uranium Project–Pilot Plant Program
Toronto, ON: Global Atomic Corporation (“Global Atomic” or the “Company”) (TSX:GLO, OTCQX:GLATF, Frankfurt:G12) is pleased to report on the successful completion of a Pilot Plant Program demonstrating the viability of the uranium recovery process detailed in the May 2020 Preliminary Economic Assessment (PEA) for the Dasa Project located in the Republic of Niger, West Africa.
The Pilot Plant was erected in August 2020 within the Process Research Ortech (PRO) facility in Canada and ran in a steady-state fashion over a 3-month period to process ore samples shipped from the Dasa Project. The ore samples were representative of the first 5 years of mining expected in the Phase 1 Dasa mine development plan. Samples representing the first 20 months of mining were processed through a first pilot campaign and had leach uranium recoveries of 92.8% at acid rates of 80 kg/t of ore. Deeper ore was then processed in a second campaign at the same acid rates but resulted in higher leach recoveries of 94.6%. On the deepest ore processed in the third campaign, acid rates of 80 kg/t of ore resulted in 97.8% uranium recovery. Given the increases in recoveries with increasing depth, acid rates were reduced to 70, 60, and 50 kg/t ore in campaign 3 with resulting uranium recoveries of 95.1%, 94.3%, and 94.1%, respectively. These high recoveries at low acid rates for deeper ore are attributed to a reduction in organic matter content with increasing ore depth.
Solvent extraction based on the latest sodium carbonate stripping technology combined with a uranyl peroxide precipitation process resulted in near quantitative conversion of uranium from the leach into final uranyl peroxide yellow cake product. The yellowcake was dried or calcined to produce UO4 or U3O8, respectively, with low impurity levels without requiring further purification to produce these varying forms of saleable uranium concentrate.