Willie Nheta, Mahlori Nkwiniak
Custom mill tailings generated during the treatment of gold ores in Custom milling plants contains a considerable significant amount of gold (Au) and silver (Ag). The potential of recovering gold and silver from the tailings by cyanidation leaching process was investigated. The custom mill tailings were characterised using Malvern particle analyser, XRF, XRD and SEM-EDS. In this study, the MiniTab software experimental design method was used to determine the optimum leaching conditions. The PSD results revealed that the custom mill tailings are coarse with 80% passing 2000μm. The tailings are a quartzite material containing minor amount of sulphides such as pyrite, chalcopyrite and pentlandite. The amount of these sulphides is very low ruling the probability of the tailings being refractory. Recoveries of 88 and 95% for gold and silver respectively were achieved leaning at 800g/t NaCN 8hrs. However, gold recovery above 85% was achieved by leaning in 600g/t NaCN for 8 hrs. Custom mill tailings have proved to be a source of precious metals and Mini Tab software is a useful tool in optimisation of the leaching conditions.
@article{0c31d699-2755-4d16-9dec-4fa045eab755,
title={Optimisation of gold recovery from small},
author={Willie Nheta and Mahlori Nkwiniak},
year={2026},
language={en}
}TY - JOUR TI - Optimisation of gold recovery from small AU - Willie Nheta AU - Mahlori Nkwiniak PY - 2026 LA - en ER -
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