OPTIMIZATION OF CCD CIRCUIT AND MERRILL–CROWE PROCESS INTEGRATION: EFFECT OF SOLUTION PURITY AND DEAERATION ON GOLD PRECIPITATION EFFICIENCY AT THE KORASAY DEPOSIT

This study investigates the effect of solution clarity, expressed as total suspended solids (TSS), and dissolved oxygen levels on the efficiency of gold recovery using the Merrill–Crowe process. The performance of zinc dust cementation is highly dependent on the physicochemical characteristics of the pregnant solution obtained from the counter-current decantation (CCD) circuit. Deviations from optimal operating parameters lead to increased zinc consumption, decreased gold precipitation efficiency, and higher operational costs. Elevated TSS levels contribute to the formation of mechanical coatings on zinc particles, while dissolved oxygen promotes zinc oxidation and passivation. Proper integration of CCD thickening, effective flocculation, and controlled deaeration is essential for stable process performance and minimal metal losses

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