Method for operating a continuous annealing or galvanization line for a metal strip
US8568137B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 4, 2008 |
| Grant date | Oct 29, 2013 |
| Priority date | — |
| Expiry date | Jan 12, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D1/52
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for operating a continuous annealing or galvanizing line for a metal strip, uses a direct flame heating section with an upstream zone and a downstream zone. The direct flame heating section is followed by a radiant tube heating section. The metal strip is indirectly heated in the direct flame heating section. The heating of the metal strip is achieved in the upstream zone by combustion of a mixture of atmospheric air and fuel such that the temperature of the combustion gas is between 1250° C. and 1500° C., preferably close to 1350° C. and in the downstream zone, the heating of the metal strip is achieved by combustion of a superoxygenated substoichiometric mixture of air and fuel such that the temperature of the combustion gas achieved at the end of the upstream zone is maintained until the end of the downstream zone of the direct flame heating section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.