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In this study, diagnostic leaching and ultrafine grinding as pretreatment step ahead of two-stage cyanidation of KaletaЕџ ore were studied to shed light on the refractory characteristics of ore. The overall gold extraction of 93\% was achieved in two-stage cyanidation of ultrafinely ground ore suggesting the presence of readily recoverable gold (74\%) and slowly reacting gold (19\%) in the ore. Diagnostic leaching approach provided information into the cause of the refractoriness of the ore. The findings of diagno...

In this study, flotation concentration of Trabzon-KayabaЕџД± Massive Sulphide ore was investigated. The effects of particle size, reagent concentration (collector and depressant) and agitation speed on the recovery of copper were studied. The results have shown that the ore responded poorly to concentration by flotation with low efficiency of seperation of copper minerals from sphalerite and pyrite. Changing the flotation conditions i.e. decreasing particle size to >99\% passing 38 $\mu$m or increasing the concent...