Patent ID: 6652681
Filing Date: 2003-11-25
Classification: C21D,F27B

Abstract:
Method of reheating metallurgical products, in which solid products are reheated so as to bring them from a temperature substantially below 400Â° C. to a temperature of at least about 1000Â° C. by passing them through a furnace having an upstream zone in which said products are preheated and a downstream zone in which 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 flue gases generated by these burners flowing as a countercurrent to the products and preheating these products in the upstream preheating zone, wherein at least one oxy-fuel burner is placed in the upstream preheating zone of the furnace, this burner being fed with an oxidizer and a fuel, the oxidizer containing more than 21 vol % oxygen.