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First Vanadium Announces Preliminary Process Flow Sheet for Carlin Vanadium Project in Nevada
Vancouver, British Columbia--(Newsfile Corp. - August 7, 2019) - First Vanadium Corp. (TSXV: ...
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[{"type":"text","content":"First Vanadium Announces Preliminary Process Flow Sheet for Carlin Vanadium Project in NevadaVancouver, British Columbia--(Newsfile Corp. - August 7, 2019) - First Vanadium Corp. (TSXV: FVAN) (OTCQX: FVANF) (FSE: 1PY) (\"First Vanadium\" or the \"Company\") is pleased to announce that ongoing metallurgical test work on the two ore types - oxidized and un-oxidized - on samples from the Company's Carlin Vanadium Project, six miles south of Carlin, Nevada, has led to the development of a preliminary process flowsheet. The flowsheet is designed to extract and recover vanadium as high-quality vanadium pentoxide. \"The Company is very pleased at achieving this major metallurgical milestone for the project. I would like to recognize the significant contributions made by our independent metallurgical consultants, SGS Canada and Sherritt Technologies. With the preliminary flow sheet defined, the Company will now initiate Requests for Proposals (RFP's) from qualified engineering firms for a Preliminary Economic Assessment,\" says Paul Cowley, President & CEO.The process flow sheet follows four generalized steps:Crushing and grinding; Pre-concentration to reduce the volume of feed to the pressure oxidation circuit; Acid leach and pressure oxidation to extract the vanadium into solution; and,Solvent extraction to generate a commercially pure vanadium pentoxide (V2O5) flake product. The extraction process uses conventional unit operations (crushing, grinding, cycloning, flotation, leaching, solid-liquid separation, solvent extraction and ion exchange, precipitation and calcination) and common chemicals (oxygen, sulfuric acid, ammonium carbonate and ammonium sulfate). Flow Sheet DescriptionThe deposit consists broadly of oxide and non-oxide ores. The run of mine (ROM) oxide ore will be crushed and screened and fed to a ball mill circuit. The milled ore will be de-slimed in an attrition scrubber, which will liberate the fine vanadium-rich particles from the coarser reject material. The scrubbed ore will be classified through multi-stage cyclones and/or thickener/clarifiers, with the fine vanadium-rich particles being advanced to the leaching circuits and the coarse carbonate-rich rejects to tails. The fine material will be treated in a pre-acidulation (acid leach) circuit to decompose any remaining carbonate prior to pressure oxidation. Th...