Process for the thermal shock treatment of spent pot linings obtained from Hall-Heroult electrolytic cells
US5245115A · kind A · utility
8Cited by
8References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1991 |
| Grant date | Sep 14, 1993 |
| Priority date | — |
| Expiry date | Jun 17, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S588/90
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The invention relates to a thermal shock treatment in a reactor of ground spent pot linings, constituted both by carbon-containing products and silico-aluminous products impregnated with fluorine-containing mineral compounds, mixed with a pulverulent mineral additive able to combine hot, with or without melting or fusion, with the fluorine-containing impregnating compounds in order to form new stable and insoluble compounds such as CaF.sub.2, binary, ternary or quaternary compounds of NaF, CaF.sub.2, SiO.sub.2, Al.sub.2 O.sub.3, CaSO.sub.4, Na.sub.2 SO.sub.4, of the nephelite, hauynite or similar type.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.