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mercury was once used throughout the world in gold processing this process has since been replaced by more efficient and less environmentally damaging techniques canadian mining operations in canada and abroad do not

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new technology for recovery of gold and silver by pressure cyanidation leaching and electrocoagulation 73 subsequent liberation of gold and silver which would then be available for the cyanide ions pressure oxidation of pyrite

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9 32 in many countries elemental mercury is used in artisanal and small-scale gold mining mercury is mixed with gold-containing materials forming a mercury-gold amalgam which is then heated vaporizing the mercury to

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gold extraction refers to the processes required to extract gold from its ores this may require a combination of comminution mineral processing hydrometallurgical and pyrometallurgical processes to be performed on the ore gold

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