Recovering Gold through the Froth Flotation Process
Pre19th century placer mining operations used mercury to dissolve the gold in crushed ore making it easier to recover. Later innovations include the MacArthurForrest Process and borax flux extraction. However one of the most interesting methods is froth flotation. Froth flotation works by exploiting the hydrophobic properties of gold molecules.
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Most methods of waterbased gold extraction are dependent on golds lack of buoyancy to work. However froth flotation uses a different property of gold to separate it from ore. Froth flotation is a method for separating hydrophobic materials (which will not mix with water) from hydrophilic materials (which readily mix with water).
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