L'air Liquide, Societe Anonyme a Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude

Olivier Delabroy

Mahendra L Joshi

Pierre Bodelin

G&eacute;rard Le Gouefflec

Christel Champinot

Savine Bockel-Macal

Gérard Le Gouefflec

Olivier Louedin

Fran&ccedil;ois Lacas

Fouad Ammoury

R&eacute;mi Tsiava

Bernard Labegore

The method and apparatus for enhancing the metallurgical quality of products treated in a furnace with several zones, wherein the temperature and the atmospheric conditions can be controlled. The applies to any type of product treated in a furnace, such as billets, blooms, slugs or slabs. Alternatively, this may be used by iron and steel manufacturers in the production line for sheets, plates, tubes, etc.

Method for enhancing the metallurigcal quality of products treated in a furnace

A furnace apparatus and method for increasing the productivity and/or quality of reheated products by improving the temperature profile of a furnace for reheating products.

Method of improving the temperature profile of a furnace

Liquid-fuel combustion system

Method of reheating metallurgical products, in which solid products, especially steel products, are reheated so as to bring them from a temperature substantially below 400&deg; C. to a temperature of at least about 1000&deg; C. by passing them through a furnace having an upstream zone in which the said products are preheated and a downstream zone in which the said products are brought to their final temperature on leaving the furnace, the downstream zone of the furnace being fitted with burners, at least some of which operate with an oxidizer which is air, the smoke (flue gases) generated by these burners flowing as a countercurrent to the products and preheating these products in the upstream preheating zone. According to the invention, at least one burner is placed in the upstream preheating zone of the furnace, this burner being fed with a mixture of oxidizer and fuel, the oxidizer containing more than 21 vol % and preferably more than 30 vol % oxygen.

Method of reheating metallurgical products

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Paris, France

Olivier Delabroy