C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
C21D 1/52 (2006.01) C21D 11/00 (2006.01) F27D 19/00 (2006.01)
Patent
CA 2637847
The invention relates to a process for the heat treatment of steel products, in particular of steel strips or sheets, in which the product is brought from a starting temperature to a target temperature in a booster zone (6, 7, 8) having at least one burner. The burner is operated with a fuel, in particular a fuel gas, and an oxygen- containing gas which contains more than 21% oxygen (oxy-fuel burner). The product is brought into direct contact with the flame generated by the burner, the air ratio lambda within the flame being set as a function of the starting temperature and/or the target temperature of the product. The burners are adjusted so that the flame surrounds the product over its entire periphery transversely to the conveying direction. Thus, the products are heated uniformly with a precisely controlled oxidation degree.
La présente invention concerne un procédé pour réaliser le traitement thermique de produits en acier, en particulier de bandes d'acier ou de feuilles d'acier, le produit étant porté d'une température initiale à une température cible dans une zone de surchauffe (6, 7, 8) comprenant au moins un brûleur. Le brûleur fonctionne avec un combustible, en particulier un combustible gazeux, et un gaz contenant de l'oxygène en une teneur de plus de 21%. Le produit est mis en contact direct avec la flamme produite par le brûleur, la teneur en air.lambda.de la flamme étant fixée en fonction de la température initiale et/ou de la température cible.
Eichelkrauth Herbert
Heiler Hans-Joachim
Hoegner Werner
Jindra Fred
Rainhard Paul
Gowling Lafleur Henderson Llp
Linde Aktiengesellschaft
Thyssenkrupp Steel Ag
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