Business
Metallurgical Report Completed For Strieborna Mine; Metallurgical Process Outlined
TSX Venture Exchange Symbol: CTG Frankfurt Exchange
About this update from District Metals Corp.
[{"type":"text","content":"\n\n\n\nTSX Venture Exchange\n\n\nSymbol: CTG\n\n\nFrankfurt Exchange\n\n\nSymbol: DFB\n\n\nVANCOUVER, Feb. 7 /CNW/ - Global Minerals is pleased to announce that it\nhas received the preliminary Metallurgical Report for its Strieborna\nsilver/copper/antimony project, by Dr. Corby Anderson, Director and Principal\nProcess Engineer of The Center for Advanced Mineral & Metallurgical\nProcessing, Montana Tech, University of Montana. Dr. Anderson was the mineral\nprocessing engineer of Sunshine Mining and Refining Co., which carried out\nextensive metallurgical tests on concentrates from Strieborna in the\nmid-1990s.\n\n\nThe report outlines the design for a 500 Tonne Per Day Flotation Mill\nwhich, based on previous metallurgical tests, and on historical resource\nestimates, could produce approximately 40-50 tonnes of concentrate per day,\ngrading 25-30 % Cu, 4000-5000 g/T Ag, 5-10 g/T Au 15-20% Sb, 0.75-1.0 % Hg.\nBased on historic information, the report assumes that ore grading\napproximately 489.3 g/T Ag, 2.093 % Cu, 1.376 % Sb, and 0.0439 % Hg would be\nmined at a rate of 500 tonnes per day for a total of 175,000 tonnes per annum,\nwith the - proposed processing plant providing a recovery rate of between\n90-95% from Ag and Cu bearing tetrahedrite.\n\n\nThe report further recommends that the flotation concentrate be treated\nfor selective removal of antimony, arsenic and mercury using an alkaline\nsulphide hydrometallurgical process, which has been in use for over fifty\nyears. Antimony metal or value added antimony products could also be produced,\nwith arsenic being precipitated and stabilized as scorodite or ferrihydrite.\nMercury will also be precipitated and stabilized as a polymeric solid.\n\n\nAny gold in the concentrate could also be recovered utilizing this\nprocess, thus avoiding the use of cyanide. Additionally, value added\nby-products such as sodium sulfate, caustic, sulfuric acid or ammonium sulfate\nfertilizer may also be produced from this process as desired.\n\n\nPresident and CEO George Heard commented, "We are delighted to have\nconfirmed what management has believed all along - that a proven metallurgical\nprocess in use for over 50 years can recover the silver, copper and antimony\nfrom Strieborna ores - while at the same time stabilizing any potentially\nharmful substances."\n\n\nGlobal Minera...