Hakan TEMUR, Ahmet YARTAŞI, Mehmet Muhtar KOCAKERİM

Investigation of leaching conditions of chalcopyrite by chlorine gas in aqueous medium

Generally, copper is obtained by pyrometallurgical methods from sulphide ores and SO2, a dangerous gas is emitted to environment. Hydrometallurgical processes is preferred over pyrometallurgical processes in recent years. The present work aims to optimize leaching of chalcopyrite with chlorine gas in aqueous medium by an experimental design using Taguchi method. Thus, both Cl2, a by-product of chlor-alkali industry, is removed using as a reagent, and emission of SO2 from copper sulphide prometallurgy is prevented. In this study, experimental parameters and their values were 16-45°C for reaction temperature, 0.05-0.20 g ml-1 for solid-to-liquid ratio, 30-120 min for reaction time, 0.027-0.4 mol l-1 for [Fe3+] and 0.025-0.4 mol l-1 for [Cu2+ ]. The optimum conditions were 45°C for reaction temperature, 0.05 g ml-1 for solid-to-liquid ratio, 0.2 mol l-1 for [Fe3+], 0.025 mol l-1 for [Cu2+ ] and 120 min for reaction time. Under these conditions, 68.44% of copper in chalcopyrite dissolved.

Keywords:

Chalcopyrite optimization, Taguchi method, chlorine,

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