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

Year 2017, Volume: 1 Issue: 1, 67 - 73, 15.12.2017

Hakan Temur , Ahmet Yartaşı , Mehmet Muhtar Kocakerim

https://doi.org/10.32571/ijct.352245

Abstract

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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