how to gold extraction

Gold - USGS Extraction of gold and other precious metals from their ores by treatment with mercury is called amalgamation. Gold dissolves in aqua regia, a mixture of hydro-chloric and nitric acids, and in sodium or potassium cyanide. The latter solvent is the basis for the cyanide Gold Extraction Equipment, Gold Extraction ... - Alibaba The Mining equipment recycling gold extraction trommel equipment is mainly used for screening or classifying the gravels and it has wide application in the construction industry. • Mining equipment recycling gold extraction trommel equipment is divided . A Lantern Retort for Small-Scale Gold Extraction ... Two major retorts used in small-scale gold mining operations to reduce mercury emissions, during amalgam distillation are the steel and thermex retorts. Steel retorts are not very popular due to the reported darkening of gold after retorting. In addition, its opaque nature prevents miners from ...    Read More