Optimization of cyanidation parameters to increase the capacity of Aghdarre gold mill

This study investigates the optimization of gold dissolution from aghdarre ore. therefore, a laboratoryinvestigation was initiated, to improve the leaching conditions with the objective of maximizing millcapacity with no reduction on gold recovery. it was observed that the time reduction from 25 to 15 hours didnot change gold recovery. in other words, it indicated that a capacity of 140t/h can be sustained without anydetrimental effect on gold recovery. the optimum parameters were 700g/t nacn, 46% solid in pulp, ph=10,and d80=45 microns using the taguchi method. so, the gold recovery was obtained 90.71%. also, it wasconcluded that the nacn concentration was the most effective parameter and the solid percent plus retentiontime had the lowest effect on this process.