The plant incorporates BioteQ’s ChemSulphide® process for metal recovery with SART technology, developed by SGS Lakefield and Teck Corporation, for cyanide regeneration. The process removes and recovers copper from the cyanide leach solution, and regenerates the cyanide for recycle back to the process. The plant is designed to treat up to 120 m3/hr of process solution containing up to 1,500 parts per million of dissolved copper, recover up to 98% of copper from the cyanide solution, and regenerate more than 90% of cyanide for re-use in the gold operation.
The plant enables Koza to meet cyanide limits in its tailings pond, enhancing the overall sustainability profile of the mine by minimizing the use of cyanide in gold recovery. This reduces the risk of potential long term liabilities associated with copper and cyanide-laden waste. In addition, the SART plant improves gold yields, enhances dore purity, and reduces operating costs for gold recovery. The plant was commissioned during the summer of 2010 and is in active operation.
The application of BioteQ’s technology at the gold mine has a number of process, environmental, and economic benefits. The plant can: