Method and device for controlling oxidizing-reducing of the surface of a steel strip running continuously through a radiant tubes furnace for its galvanizing
US8609192B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 4, 2008 |
| Grant date | Dec 17, 2013 |
| Priority date | — |
| Expiry date | Feb 20, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27B9/28
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for guaranteeing the oxidation of a strip designed to prevent the selective oxidation of alloy elements of the steel in a continuous steel strip galvanizing annealing furnace having a pre-heating section and a hold section and provided only with radiant tubes. The oxidation of the strip is designed to prevent the selective oxidation of elements of the steel alloy. The novel method includes the following steps: installation of at least one modified tube capable of injection an oxidizing medium at least one point in the oven heating section and/or at least one point in the hold section and injection of the oxidizing medium by means of the modified tube(s), the oxidizing medium having a composition such that in the conditions of the temperature of the oxidizing medium and the steel strip and as a function of the chemical composition of the strip said medium has a dew point which guarantees an in-depth oxidation of the alloy elements of the steel strip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.