R.J. Davidson, C.G. Schmidt
Parameters affecting gold elution using the AARL process are reviewed and critically analyzed in an attempt to optimise metallurgical efficiency and minimise costs in both current and future carbon adsorption operations. Such factors as acid washing, column geometry, elution temperatures and pretreatment reagents are discussed together with eluant water quality and eluate flowrates. Hot acid washing of carbon prior to gold elution has many benefits. Besides improving elution efficiency when eluting with regional water, a hot acid treatment preheats the carbon without causing any gold leakage. Laboratory data indicated that hot acid washing reduces the mass loss of carbon during thermal regeneration. The eluate going to either zinc precipitation or electrowinning is also relatively free of troublesome impurities (organic contaminants and metallo-cyanides in particular). The two significant factors affecting the AARL gold elution are temperature and reagent addition. High temperature and high reagent additions within prescribed limits will improve metallurgical efficiencies, but a balance between energy and reagent costs is required in order to minimise overall elution costs.
@article{290e9f73-ee53-4a8c-a34d-2550c6253685,
title={A review of AARL},
author={R.J. Davidson and C.G. Schmidt},
year={2026},
language={en}
}TY - JOUR TI - A review of AARL AU - R.J. Davidson AU - C.G. Schmidt PY - 2026 LA - en ER -
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