James M. Mwase, Jochen Petersen
This research proposes a new conceptual process to economically extract platinum group metals (PGMs), and as a secondary aim, base metals (BMs) from a low-grade concentrate originating from typical PGM concentrator plants. Slurry made from the concentrate was coated onto granite pebbles and packed into a column, in which it was bioleached with a mixed culture of thermophiles and mesophiles at 65°C. After 30 days the extractions achieved were 52 % copper, 95 % cobalt. The residual concentrate material was subsequently subjected to a cyanide leach also in a packed column operating at a room temperature of 23°C. After 21 days 20.3 % Pt, 87 % Pd and 46 % Rh were extracted. Using these results and projected extractions over longer operating times, a conceptual flowsheet was proposed for a possible process route to recover PGM values circumventing the problematic smelter route for this material.
@article{dbab014b-90e2-47da-881d-9ef913fbbfdd,
title={A conceptual flowsheet for heap leaching},
author={James M. Mwase and Jochen Petersen},
year={2026},
language={en}
}TY - JOUR TI - A conceptual flowsheet for heap leaching AU - James M. Mwase AU - Jochen Petersen PY - 2026 LA - en ER -
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