Search Results - "van Dyk, L.D."

Extraction of alumina from coal fly ash using an acid leach-sinter-acid leach technique by Shemi, A., Ndlovu, S., Sibanda, V., van Dyk, L.D.

“…In this paper, a two-step acid leach process for the extraction of aluminium from coal fly ash has been conducted using an acid leach-sinter-acid leach…”
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Selection of a suitable ligand for the supercritical extraction of gold from a low-grade refractory tailing by van Dyk, L.D., Mawire, G., Potgieter, J.H., Dworzanowski, M.

“…Reprocessing tailings for gold recovery is generating new low-grade refractory secondary tailings. Unlocking gold trapped within these secondary tailings…”
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Alternative techniques for extracting alumina from coal fly ash by Shemi, A., Mpana, R.N., Ndlovu, S., van Dyk, L.D., Sibanda, V., Seepe, L.

“…► Acetylacetone can extract up to 17.9% aluminium and sulphuric acid up to 23.5%. ► Aluminium extractions represent 64% and 85% from CFA amorphous phase…”
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Extraction of aluminium from coal fly ash: Identification and optimization of influential factors using statistical design of experiments by Shemi, A., Ndlovu, S., Sibanda, V., van Dyk, L.D.

“…In this study, a statistical Design of Experiments (DOE) method combined with response surface methodology (RSM) was used for identification and optimization…”
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