2. Gold solutionizers
Contact between the cyanide leach solution and the gold is essential for its dissolution. In addition, it is necessary to ensure the introduction of air or oxygen. These two requirements guided the mechanical design of the equipment.
Two classes of reactor meet these requirements: agitated open reactors and closed or autoclave reactors. The latter are used to oxidize sulfides containing invisible gold, which is released and recovered in the sludge. The sludge is then washed and cyanidized in stirred reactors at atmospheric pressure.
2.1 The case of free gold and accessible combined gold
Agitation has a dual purpose: to keep the solids in suspension (the ore is generally ground to 65 µm) and to supply the oxygen needed to bring the...
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Gold solutionizers
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