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Chemical speciation in hydrometallurgical cyanide solutions
Conference paper

Chemical speciation in hydrometallurgical cyanide solutions

G.T. Hefter and P.M. May
The Australasian Institute of Mining and Metallurgy
Fifth AusIMM Extractive Metallurgy Conference (Perth, Western Australia, 02/10/1991–04/10/1991)
1991
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Abstract

The role of chemical speciation in alkaline cyanide solutions is discussed by reference to recent experimental data from the authors' laboratories. It is shown that serious gaps exist in our present knowledge of the thermodynamics of cyanide complexes in solution. Nevertheless, using the available data and the JESS suite of computer programs is has been possible to develop a simplified chemical speciation model for alkaline cyanide solutions under conditions relevant to the gold extraction process. Some possible implications of the model for plant operations are discussed.

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