Improved Operating Efficiency at Mount Percy Through the Use of Oxygen in Cyanidation

Archibald N, ; Thomas L,
Organization: The Australasian Institute of Mining and Metallurgy
Pages: 10
Publication Date: Jan 1, 1992
The use of oxygen in the Mount Percy cyanidation circuit was investigated, with the aim of improving recovery. Preliminary batch and plant testwork justified a plant trial, and it was demonstrated that the use of oxygen reduced gold leachable from plant tailings by 12 per cent, and was economically viable. Oxygen is now in permanent use. Other benefits of oxygen in leaching were not proven. There were no savings on compressed air costs and no measurable reduction in cyanide consumption, although HCN levels in the atmosphere above the tanks declined. The possibility exists that more efficient use of compressed air for tank aeration could have achieved similar recovery gains.
Full Article Download:
(925 kb)