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Sulfides and carbonaceous matter in double refractory gold ore were bio treated sequentially using an iron oxidizing archaeon Acidianus brierleyi followed by lignin peroxidase dominating crude enzymes released from the white rot fungus Phanerochaete chrysosporium to significantly improve gold recovery from 24% to 92%.
The slime fraction of the ore overflowed by the hydraulic classifier and by the rod mill spiral classifier is thickened in a Spiral Rake Tray Thickener for treatment by flotation. The flotation circuit is designed to treat three classes of manganese ores. Those ores with a high calcite gangue. Those ores with mixed calcite and siliceous gangue.
mg/L) and manganese also showed evidence of surface water contamination. Traditional treatment methods would have included the use of clarification, oxidation, coagulation, and filtration. Instead, the util ity was able to use an ultrafiltration membrane to accomplish the removal of the iron, manganese, and pathogens.
the area restored) in Butterfeild Canyon, Utah, had ore of manganese of the pink variety. Some of the ore showed native gold in the pinkish rock. There are many outcrops of this manganese rock up there, but much is private property. Unknown if the outcrops contain gold locked up in the mangaese. One rock
The feasibility of this method will depend largely on the cost of fuel and salt at the mill as well as the assay value of the ore. There will also be a loss entailed by volatilization of a part of the gold if gold be present and also to a less extent of the silver.
Under the conditions mass ratio at 2:3, reaction temperature at 1073.15 K, reaction time at 30 min, the gold leaching rate of carbonaceous gold ore can reach 97.43 % and the manganese leaching rate of pyrolusite can reach 99.31 %.
June 10, 2020
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