Method for the use of material containing carbon in the electrolytic production of aluminium
US6159603A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1998 |
| Grant date | Dec 12, 2000 |
| Priority date | — |
| Expiry date | Sep 25, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2991
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for the use of material containing carbon as a packing material, anode mass or collar mass in connection with the electrolytic production of aluminium. The material is formed by granulating a mass which contains carbon particles and a binder. The carbon particles may comprise a carbon material which has been returned from the aluminium production process. The binder may comprise tar which is collected in connection with burning anodes. The carbon particles may comprise butt filter dust and can contain contaminants such as sodium (Na) and fluorine (F). By adding a powder/dust which contains silicon oxide (SiO.sub.2) to the mass, the contaminants can be rendered harmless. The added material can be formed by crushing and grinding used cassette stone (chamotte) to dust The present invention makes possible comprehensive reuse of several waste products of the electrolytic production of aluminium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.