Thyssen Stahl Ag

Sms Demag Ag

Thyssen Industrie Ag

Manfred Zeimes

Wilfried Prange

Andreas Ploch

Joseph Sturm

Heinrich Schmitz

Rainer Dittrich

Horst-Dieter Sch&ouml;ler

Martin Koch

Steffen Thiem

Hans Schachheim

Method for injecting gases into a metallurgical tank

A process and apparatus for continuous welding by a laser beam of guided and abutted strips or plates which lie in a plane comprises supplying a follow-up process gas to a welding location and thereafter, cooling the welding location by applying a sprayed-on coolant to an area adjacent to the welding location. The coolant comprises a mixture of water and gas, and is sprayed onto the strips or plates in the form of a flat jet. The flat jet extends towards the welding location and lies in a plane perpendicular to the plane of the strips or plates. The leading edge of the flat jet forms an acute angle with the laser beam.

Process and apparatus for the continuous welding of guided and abutted strips or plates by means of a laser beam

The invention relates to a process and apparatus for the welding of strips 1, 2 without a filler by means of a laser beam 6. To keep the gap width of the joint edges formed by the strips 1, 2 at the joint as small as possible, disposed downstream of the welding focus in the direction L in which the strips 1, 2 run is a cooling device 10, 11, the cooling intensity is controlled to a constant small gap width in dependence on the gap width measured immediately upstream of the welding focus, referred to the direction L.

Process and apparatus for the continuous welding of strips guided in

An atmospheric gas boiler has two vertically arranged end pieces and at least one middle piece arranged between them, as well as burner lances disposed in the lower part of the gas boiler. The pieces of the boiler through which hot water flows define a furnace, with secondary heating surfaces adjoining thereto. In order to lower the quantity of NOX arising during the combustion, the middle piece has a tongue through which hot water flows, extending into the furnace. The tongue possesses cooling ribs on the outside, which extend into the adjoining furnace spaces.

Atmospheric gas boiler

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Hilden, Germany

Manfred Zeimes