Title :
Extraction of alumina from pulverised fly ash: Hwange power station
Author :
Gudyanga, F.P. ; Togara, F. ; Harlen, R.M.
Author_Institution :
Zimbabwe Univ., Harare, Zimbabwe
Abstract :
The authors describe experimental work done to establish the feasibility of extracting aluminum from pulverized fly ash (PFA) produced at the Hwange thermal power station in Zimbabwe. The results show that Al can be extracted in either acid or alkaline media. In acid, iron is co-dissolved, necessitating a subsequent separation stage. In alkaline solution only Al is extracted to yield 55% recovery as compared with 30% recovery in the acid system. The dissolution of Al is time/concentration dependent
Keywords :
thermal power stations; 920 MW; Al; Zimbabwe; acid; alkaline; alumina; dissolution; extraction; feasibility; pollution control; projects; pulverised fly ash; recovery; recycling; separation; thermal power station; Aluminum; Artificial intelligence; Fly ash; Geology; Iron; Mouth; Power engineering and energy; Power generation; Power generation economics; Thermal engineering;
Conference_Titel :
AFRICON '92 Proceedings., 3rd AFRICON Conference
Conference_Location :
Ezulwini Valley
Print_ISBN :
0-7803-0835-2
DOI :
10.1109/AFRCON.1992.624422
