Elvis Fosso-Kankeu, Frans Waanders
Chalcopyrite accounts for 70% of all copper bearing minerals and has been closely studied to understand the dissolution kinetics in hope of overcoming the passivation film and increasing copper extraction rates. This study obtained carbonatite samples from a South African mining company, which were leached and assessed for metal ions content, pH, electrical conductivity (EC), RedOx potential (RP), acidity, major anions, and iron ion concentration for speciation prediction. The objective was to determine the kinetic dissolution pattern of the run of mine (ROM) chalcopyrite samples over time. Mineralogical investigation revealed the ROM sample was dominated by calcite magnesium, while elemental analysis indicated dominance by Ca and Fe. The dissolution curve showed a decrease in copper dissolution rate influenced by passivation, with a peak dissolution rate of 22.8% observed after 7 hours of leaching. ICP data indicated Ca, Cu, Fe, and Mg as major cations in the leachate. Results from PHREEQC modelling confirmed that Ca, Cu, and Mg were dominant as sulfate salt species, with Fe existing primarily as a free ionic species (Fe2+).
@article{1fa7a28f-8383-41ee-9601-a76336a79dcc,
title={Chalcopyrite dissolution kinetics in carbonatite samples},
author={Elvis Fosso-Kankeu and Frans Waanders},
year={2023},
language={en}
}TY - JOUR TI - Chalcopyrite dissolution kinetics in carbonatite samples AU - Elvis Fosso-Kankeu AU - Frans Waanders PY - 2023 LA - en ER -
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