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Northern Iron Corp. Completes Test Work Results on Historic Griffith Mine Drill Core
(via Thenewswire.ca) Vancouver , British Columbia / TheNewswire / March 21, 2016 - Nort...
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[{"type":"text","content":"Northern Iron Corp. Completes Test Work Results on Historic Griffith Mine Drill Core(via Thenewswire.ca)\n\n \nVancouver, British Columbia / TheNewswire / March 21, 2016 - Northern Iron Corp. (\"Northern Iron\" or the \"Company\") (TSX-V: NFE) (FRANKFURT: N8I) today announced the completion of Bench scale testwork on historic drill core from the Griffith mine, Red Lake, Ontario. The test work was completed by the SGS Lakefield laboratory in Peterborough. The metallurgical report from Hatch Ltd., (Hatch) has determined that a concentrate with less than 3% silica has been achieved, which is a requirement for Electric Arc Furnaces (EAF) using direct reduced iron pellets (DRI). \n\n \n \nThe report concludes that an iron ore concentrate grading 69.4% Fe and 2.76% SiO2 is feasible with the Griffith iron ore.\n\n \n \nBasil Botha, President and CEO said: \"Discussions with potential US steel market off-take partners highlighted the requirement to produce a higher grade DRI than the standard for merchant DRI and HBI. The work completed by Hatch, shows that we will be able to meet these standards and gets us one step closer to feasibility. Also important were the low levels of deleterious elements such as phosphorous and sulphur.\"\n\n \n \nThe pre-set target was achieved and obtained an iron concentrate grading 69.4% Fe, 2.76% SiO2 with overall recoveries of 54% Fe in ~24.8% of weight. \n\n\n \n-Dry cobbing test results show that 13.5% of non-magnetic was rejected. \n\n\n \n-Low intensity magnetic separation (LIMS) concentrate graded 51.8% Fe with 94% iron recovery. The combined Cobber and wet LIMS operation upgraded the iron grade from 31.7% Fe to 51.8% Fe with approximately 9% iron losses into the combined cobber and wet LIMS tailings, the performance was as expected. The LIMS concentrate still contains 24.5% SiO2 and other impurities, which likely makes the desliming and reverse flotation more challenging. \n\n\n \n-Desliming is very efficient for removing silica and other impurities. An aggressive settling & decanting step was conducted in test F4 compared to test F2. The removed ~79.4% SiO2 in 26.8% of slime weight with only ~6.4% iron losses. The results suggest the developed flowsheet should include desliming stage (hydroseparation). \n\n\n \n-After desliming, the sand (flotation feed material) contains 66.2% Fe, 6.73% SiO2 ...