Composition of the heat insulating part of the spent lining _ waste of overhaul of aluminum electrolysers

20th International Scientific and Research Conference "Metallurgy: Technologies, Innovation, Quality. Metallurgy-2017"

Rzechitskiy, E.P.^1 ; Petrovskiy, A.A.^1 ; Nemchinova, N.V.^1 ; Ivanov, A.A.^1 ; Bogdanov, Yu V.^2

Irkutsk National Research State Technical University, 83 Lermontov street, Irkutsk

664074, Russia^1

UC RUSAL, RUSAL Engineering Technology Centre, Krasnoyarsk, Russia^2

关键词: Chemical and phase compositions;    Electrolysers;    Electrolytic production;    Presence of water;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/411/1/012062/pdf
DOI  :  10.1088/1757-899X/411/1/012062

来源: IOP

【 摘 要 】

The main part of losses of fluorine during the electrolytic production of aluminum accounts for the wastes of the overhaul of electrolysers - spent lining. To assess the possibility of creating a technology for the regeneration of fluorine from the heat insulating part of the spent lining of aluminum electrolysers, its chemical and phase composition was studied. Presence of water-soluble fluorides in the heat insulating part of the spent lining makes it possible to extract from it up to 70% of fluorine by leaching.