Van der Merwe, E.M. (Elizabet Margaretha); Gray, Clarissa L.; Castleman, Barbara A.; Mohamed, Sameera; Kruger, Richard A.; Doucet, Frédéric J.(Elsevier, 2017-08)
We recently showed that the selective extraction of aluminium from the amorphous phase of a South African ultrafine coal fly ash can be achieved via thermochemical treatment with ammonium sulphate for 1 h followed by aqueous ...
Doucet, Frédéric J.; Mohamed, Sameera; Neyt, Nicole Candice; Castleman, Barbara A.; Van der Merwe, E.M. (Elizabet Margaretha)(Elsevier Science Limited, 2016-12)
South African coal fly ash represents an untapped secondary resource of aluminium. Continuous research is conducted
to develop suitable chemical and/or geometallurgical processes for aluminium extraction, preferably ...
Castleman, Barbara A.; Van der Merwe, E.M. (Elizabet Margaretha); Doucet, Frederic J.(Elsevier, 2021-04)
This study reports on the thermochemical reactivity of talc with ammonium sulphate, a low-cost, recyclable chemical additive commonly used in the thermochemical extraction of strategic metals from low-grade ores and ...
