Fundamental investigations of SART for cyanide and copper recovery

CIM Journal, Vol. 4, No. 3, 2013
A. Simons Parker CRC for Integrated Hydrometallurgy Solutions, CSIRO Minerals Down Under National Research Flagship, Waterford, Australia; W.A. School of Mines, Curtin University, Bentley, Australia P. Breuer Parker CRC for Integrated Hydrometallurgy Solutions, CSIRO Minerals Down Under National Research Flagship, Waterford, Australia
Abstract The SART (sulphidization, acidification, recycle, and thickening) process is an effective
way to separate copper and cyanide in the waste stream of gold processing plants using cyanidation. Factorial
experimentation has been conducted to create models of copper recovery, cyanide recovery, acid
addition, and oxidation/reduction potential during SART. Economic analysis of the resultant models
showed that SART is best operated with a sulphide-to-copper molar ratio of approximately 0.56, pH of
4, and a minimized cyanide-to-copper molar ratio. The experiments also showed that residence time can
have drastic impacts on SART performance.
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