L.M. Sekhukune, F. Ntuli
The atmospheric leaching of copper-bearing matte by acidified ferric chloride solution was studied to achieve maximum recovery of copper and nickel while exploring the underlying leaching mechanisms. The research employed a laboratory-scale methodology to analyze the effects of temperature, and concentrations of ferric chloride and oxygen on the leaching process. Primary phases identified included dipeptide (Cu1.98S), hazewoodite (Ni3S2), and Ni alloy, with a matte composition of Cu 31.1%, Ni 0.6%, Fe 0.4%, and platinum group metals (PGMs) at 0.05%. Results indicated a maximum nickel extraction of 98% achieved via a two-stage oxidative leaching at 90°C with 1 g/L Fe3+, contrasting with a 66% extraction under non-oxidative conditions. Additionally, copper extraction reached 99% in the first 45 minutes using two-stage non-oxidative leaching, and copper was successfully recovered from the solution by concentration. The study concluded that three simultaneous processes—dissolution, metal extraction, and oxidation—occurred throughout the leaching, with diffusion being a controlling factor.
@article{4440b53d-adbd-45b5-9c21-303a705ed96f,
title={Atmospheric oxidative and non oxidative},
author={L.M. Sekhukune and F. Ntuli},
year={2026},
language={en}
}TY - JOUR TI - Atmospheric oxidative and non oxidative AU - L.M. Sekhukune AU - F. Ntuli PY - 2026 LA - en ER -
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