VANCOUVER – SIGMA Lithium Resources Corporation (TSX-V: SGMA) (OTC- QB: SGMLF) reported exceptional results of metallurgical tests performed to evaluate, among other parameters, the recovery of lithium from the Barreiro deposit proposed to be developed in Phase 2 of the Company’s Grota do Cirilo Project. The Met Tests included a heavy liquid separation test to evaluate the extent to which a gravity-based separation process, or dense media separation, could successfully recover the lithium from the spodumene ore.
HLS test work done on ore sizes of 6.3mm and 10mm achieved excellent lithium recoveries of 70.2 % and 66.1%, respectively, producing a 6% Li2O battery-grade spodumene concentrate within the highest levels of specifications demanded by the chemical lithium market without the use of flotation or hazardous chemical reagents, such as sulphuric acid, in the concentration process. This is consistent with Sigma’s intention to continue to process its lithium ore in a “green” environmentally-friendly and sustainable manner.
Calvyn Gardner, Chief Executive Officer and Co-Chairman of Sigma’s Board of Directors said: “The doubling of planned capacity with low additional capex indicated by the Met Tests has the potential to significantly transform Sigma, enhancing its economies of scale. We are very pleased to have successfully concluded this crucial step with SGS Canada Inc., as part of the workstreams involved in updating the Feasibility Study Report with the Barreiro (Phase 2) deposit, which would be fully integrated into the production complex for the Xuxa (Phase 1) deposit, currently in pre-construction. The Feasibility Study Report has 20.5 million tonnes of measured and indicated mineral resources (10.3MT measured and 10.2MT indicated) in the Barreiro deposit from which to support an estimation of mineral reserves currently in progress by SGS Canada Inc.”
Sigma is a Canadian company that has been producing environmentally sustainable battery-grade lithium concentrate on a pilot scale since 2018 and shipping high-purity “green & sustainable” 6% Li2O battery-grade lithium concentrate samples to some of the leading global cathode and battery producers of electric vehicles. The company is in pre-construction (including the EPC and “contract-readiness” of core construction suppliers) of its larger-scale lithium concentration commercial production plant. Based on the Feasibility Study Report, it will contemplate a capacity to produce at the rate of 220,000 tonnes annually of battery-grade “green” lithium concentrate and Sigma will be amongst the lowest-cost producers of lithium concentrate globally. The Feasibility Study Report is being updated to include the development of the Project’s second deposit, contemplating production at the rate of 440,000 tonnes per annum.
To secure a leading position supplying the clean mobility and green energy storage value chain, Sigma says it has adhered to the highest standards of environmental practices in line with its core values and mission since starting activities in 2012. Sigma’s production process is powered by hydroelectricity and the Company utilizes state-of-the-art dry-stacking tailings management and water-recycling techniques in its beneficiation process. Its corporate mission is to execute its strategy while embracing strict ESG principles. Sigma’s shareholders include some of the largest ESG-focused institutional investors in the world.
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