Kivalliq Announces Positive Metallurgical Results from Lac 50 Trend; Low Impurity Yellowcake Produced

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[{"type":"text","content":"\n\n\n\n\n\nVANCOUVER, Feb. 28, 2013 /CNW/ - Kivalliq Energy Corporation (\"Kivalliq\"- \"KIV: TSX-V\") today announced preliminary metallurgical test results for the Lac 50\n Trend uranium deposits. Optimized results from alkaline leaching\n indicate that 94.1% of uranium can be extracted in 48 hours and 95.9% of uranium\n extracted in 72 hours. Furthermore, from a preliminary yellowcake\n precipitation test, the uranium value (\"U\") attained was 71.9% for a\n final yellowcake product.\n\n\n\"The final yellowcake produced from the leach solution was a low-impurity\n product. Available final yellowcake assays fell below the Maximum\n Concentration Limit Without Penalty  of ASTM C967-13, Standard\n Specification for Uranium Ore Concentrate.\" stated Chuck Edwards, Director of Metallurgy, AMEC. \"The alkaline leaching process proposed for the Lac 50 Trend uranium\n deposits is similar to that used successfully for almost 30 years at\n Eldorado Nuclear's Beaverlodge mill in northern Saskatchewan.\"\n\n\nCommencing in June 2012, the Saskatchewan Research Council (\"SRC\")\n metallurgical testing program on core from Kivalliq's Lac 50 Trend was\n designed to investigate uranium alkaline leaching optimization and\n perform a preliminary evaluation of the purity levels of the final\n yellowcake product. Objectives of the tests were to:\n\n\nMaximize uranium extraction through optimizing the alkaline leaching\n process\n\n\nMaximize the recovery of sulphides through flotation\n\n\nCompare preliminary yellowcake product impurity levels to ASTM C967-13\n uranium ore concentrate specifications\n\n\nA 60 kilogram (\"kg\") composite was derived from split drill core pulp\n rejects submitted to SRC for analysis. Samples were selected from 51\n holes drilled along 3.2 kilometres of strike length at the Lac 50 Trend\n Main Zone, Western Extension and Eastern Extension.  Previous work\n indicated carbonate content above 13% and therefore alkaline leaching\n was considered the most effective extraction process for the Lac 50\n Trend uranium deposits.  Results from alkaline leaching tests to date\n are highly encouraging.\n\n\nOptimized results(shown in Figure 1) indicate that a - 74 µm (-200mesh) feed at 70oC, atmospheric pressure, 50% pulp density, sufficient oxidation, and a\n reagent addition rate of 70 kg/tonne (50 kg Na2...

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