J.J. Eksteen, J.M. Mwase
The extraction of platinum group metals (PGMs) from low-grade concentrates poses significant challenges due to their refractory nature and the drawbacks associated with traditional extraction methods. This paper investigates a novel energy-efficient sequential stage heap leach process that incorporates heap bioleaching and high-temperature cyanide leaching to enhance extraction efficiencies. The process begins with heap bioleaching utilizing a mixed culture of mesophilic and thermophilic organisms to selectively leach base metals in an acidic sulfate medium before transitioning to high-temperature cyanide leaching, where the cyanide solution is heated using solar energy. The effectiveness of carbon-in-pulp (CIP) methodologies for recovering PGMs from the pregnant leach solution is also assessed. The results indicate successful recovery of palladium, gold, and platinum during the cyanide leaching stage. Furthermore, the kinetics of adsorption and elution in this process closely resemble traditional gold processing methods, suggesting a viable integration of these techniques for PGM recovery. This innovative approach addresses challenges posed by traditional methods, optimizing energy use while potentially increasing resource recovery from complex ore deposits.
@article{8db31db5-bc96-4203-985f-a6f26845377a,
title={A novel energy efficient process for the},
author={J.J. Eksteen and J.M. Mwase},
year={2026},
language={en}
}TY - JOUR TI - A novel energy efficient process for the AU - J.J. Eksteen AU - J.M. Mwase PY - 2026 LA - en ER -
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