Fives Stein

Patrice Sedmak

Stephane Magne

Sébastien Lemaire

Alphonse Pitocco

Camille Moukarzel

Abou Ba

Jean-Pierre Lipp George

Stéphane Magne

The invention relates to a method for removing residues present on a metal strip at the outlet of a cooling stage of a continuous line, the residues being formed during a cooling of said metal strip by a non-oxidizing liquid solution for the metal strip and a stripping liquid solution for the oxides present on the surface of the strip, or by a mixture of this liquid solution and a gas. The method according to the invention is characterized in that it comprises a step of reducing the residues by hydrogen.

Device and method for heat treatment of steels, including a wet cooling

A method for reducing nitrogen oxide NOx emissions during combustion of a gaseous fuel in a burner intended for a naked-flame or controlled-atmosphere reheating furnace, for reheating steel products or for continuous coating and/or annealing of metal strips, wherein a first dilution is carried out by mixing combustion air with combustion products upstream from or in the body of the burner, and a second dilution is carried out directly at the level at which the gaseous fuel reacts with the combustion air, mixing the fuel with a recirculated portion of the flame or products of partial combustion, the double dilution enabling the physical and chemical properties of the gas to be modified in order for the burner to operate with low oxygen rates and obtain a flame that produces a very low level of NOx production regardless of the temperature of the enclosure in which the combustion takes place.

Method and burner for reducing nitrogen oxide emissions during the combustion of a gaseous fuel

The invention relates to a heat recuperator (R) for a radiating tube burner having a burner pipe and an exhaust pipe (), the recuperator being placed at the outlet of the exhaust pipe () and including a heat exchanger (E) that comprises: an outgoing section () for directing the air to be preheated to a ferrule (), placed on the end of the recuperator, from the fume intake side, and a return section () opening towards a pipe () for supplying air from the burner, the assembly being provided such that part of the fumes are led through, and mix with, the combustion air; the heat exchanger (E) occupies only part of the cross-section of the exhaust pipe (), the other part () of the cross-section remaining free for the fumes; the combustion air is heated by the fumes in the outgoing section () and in the return section (), being radially shifted outside the outgoing section () and immersed in the fumes.

Recuperator for a radiating tube burner

The invention relates to a device for controlling regenerative burners used as a firing device, particularly for iron and steel product heating furnaces or for radiating tubes for continuous strip steel processing lines, according to which the supply of at least one of the fluids involved in the combustion (fuel and comburent) is carried out through a rotary injector () rotating by means of a rotatable actuator (M) so as to supply fluid alternately to one and then the other of the burners (B, B), the rotary injector () being placed on the comburent inlet duct (), particularly air, and is provided to partially obstruct the supply pipe () to the burner (B; B) such that one portion of the fumes from a regenerator () for the non-operating burner (B; B) is led to the operating burner (B; B) and such that the other portion of the fumes is discharged to the stack.

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Laimont, France

Patrice Sedmak