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Results of Crushing Testwork
Results of Crushing Testwork.
About this update from First Tin Plc
[{"type":"text","content":"\n\n\n \n11 September 2023\nFirst Tin Plc\n(\"First Tin\" or \"the Company\")\nCrushing Testwork Confirms Significant Upgrading Effect for Both High-grade and Low-grade Mineralisation at Taronga Tin Project\n \n \nFirst Tin PLC (\"First Tin\"), a tin development company with advanced, low capex projects in Germany and Australia, is pleased to report that results of the crushing pre-concentration testwork on bulk samples from its Australian Taronga project from an adit through the North Pit mineralisation have now been received and assessed. \n \nThe results confirm First Tin's hypothesis that due to the selective breakage along veins (Figures 1 to 4), liberation of cassiterite can be achieved simply by coarse crushing to 12mm and screening at 2.8mm. The plus 2.8mm fraction is a discard while the minus 2.8mm fraction goes through the processing plant, thus the mass going through the plant is significantly decreased and the tin grade significantly increased.\n \nTwo samples have now been tested, one grading 0.18% Sn (high grade) and the other grading 0.10% Sn (low grade). \n \nResults are:\n \n· High-grade sample (0.18% Sn)\no Sub 2.8mm size fraction contains 85% of the tin in 54% of the mass\no This fraction has been upgraded from 0.18% Sn to 0.30%Sn\no Plus 2.8mm size fraction contains 15% of the tin in 46% of the mass\n· Low-grade sample (0.10% Sn)\no Sub 2.8mm size fraction contains 84% of the tin in 58% of the mass\no This fraction has been upgraded from 0.10% Sn to 0.15% Sn\no Plus 2.8mm size fraction contains 16% of the tin in 43% of the mass\nThe samples were initially jaw crushed on site to around 45mm and were subsequently re-crushed in the ALS Metallurgy laboratory in Perth to 12mm using a simulated conventional three-stage crushing circuit. \n \nThis crushed sample was screened at 2.8mm with the oversize and then put through a single pass vertical impact crusher (VSI) to scavenge any tin (cassiterite) not already liberated. This product was again screened at 2.8mm and the minus 2.8mm fraction re-combined with the minus 2.8mm fraction from the conventional crushing. The plus 2.8mm material is considered as waste and is sent directly to a waste rock empla...