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The first step after crushing the ore is milling. This takes place in metal drums with hard metal rods or balls. No mercury is added. After milling, ... The Borax Method of Gold Extraction for Small-Scale Miners. Blacksmith Institute Journal of Health & Pollution . Vol. 2, No. 3 — June 2012.
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For most small-scale gold prospectors, crushing ore to determine the amount of free gold is the best method to determine gold content within an ore sample. Free gold can then be collected using traditional gravity based methods, which do not require the same level of permitting as the chemical methods used by commercial gold mines.
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Artisanal and Small-Scale Gold Mining Without Mercury. ... Although many miners use mercury in artisanal and small-scale gold mining, it is possible to safely and economically recover gold without it. ... Using Concentration Methods. Concentration means increasing the amount of gold in ore or sediment, by selectively removing lighter particles.
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