Method of producing carbonaceous blocks in a tunnel type furnace
US4569835A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1983 |
| Grant date | Feb 11, 1986 |
| Priority date | — |
| Expiry date | Aug 5, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/532
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
This invention relates to a method of producing carbonaceous blocks, and more particularly to a method of manufacturing anodes for the electrolytic reduction of aluminum, consisting of coating said blocks with an antioxidizer protective powder and calcining them while being passed through a tunnel type furnace in an oxidizing atmosphere in conformity with thermal conditions whereby, as said blocks reach a temperature of 200.degree.-600.degree. C. at which they release volatile organic substances, said oxidizing atmosphere has a temperature of at least 550.degree. C.; thus, complete combustion of the volatile substances is accomplished in said furnace to yield gases which are free of said volatile organic substances, and wherein said blocks later attain a final baking temperature of up to about 1,200.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.