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Gold and silver are extracted from their elemental state or from complex ores and alloys by leaching them with a solution containing ammonia, ammonium salts and one ...
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ELSEVIER Hydrometallurgy 35 (1994) 141159 hydrometallurgy Extraction of platinum, palladium and gold by cyanidation of Coronation Hill ore Mclnnes, ...
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Most gold ore now comes from either open pit or underground mines. The ores sometimes contain as little as 5/100 of an ounce of gold per ton of rock. In ...
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