Mannesmann Aktiengesellschaft

Sms Schloemann-siemag Aktiengesellschaft

Sms Demag Ag

Sms Siemag Aktiengesellschaft

Lechler Gmbh & Co. Kg

Mannesmann Aktiengesellshcaft

Gustav Wiegard Maschinenfabrik

Fritz-Peter Pleschiutschnigg

Lothar Parschat

Hans Schrewe

Werner Rahmfeld

Michael Vonderbank

Ingo Von Hagen

Hans Gruner

Stephan Feldhaus

Giovanni Arvedi

Joachim Schwellenbach

Gerd Diederich

Wei-Ping Wu

Hans-Juergen Ehrenberg

Dieter Rosenthal

Tarek El Gammal

Giovanni Gosio

Karl-Ernst Hensger

Sepp Mezger

Gerd Moellers

Dieter Stalleicken

Peter Lorenz Hamacher

Dieter Tembergen

Hans U Franzen

Ulrich Siegers

Paul Splinter

Klaus Bruckner

Wolfgang Bleck

Armin Burau

Hans-Georg Eberhardt

Kurt Lerch

Rolf-Peter Heidemann

Manfred Pfluger

Erwin Wosch

Harald Ludorff

Thomas Ulke

Rainer Teworte

Robert Victor Kowalewski

Axel Weyer

Peter Heinrich

Hartmut Hille

Dietmar Lohse

Manfred Albedyhl

Peter Stadler

Rainer Lenk

Josef Glaser

Hans-Joachim Paris

Luciano Manini

Ernst Windhaus

Michael Steuten

Hans Butz

Joachim Von Schnakenburg

Peter Meyer

Karl Holter

J&uuml;rgen Friedrich

Hans Gunter Thurm

Gustav Wiegard

Werner Christner

Oliver Richard Picht

Hans Van Bonn

Hans-Joachim Meyer

Horst Euler

Franz Feldmann

Hans G Eberhardt

Uwe Kopfstedt

Hans J Ehrenberg

Ursula Kallenborn-Weber

Uwe Franzen

Volker Hille

Hans-Gunther Thurm

Winfried Binder

Claus-Dieter Haufe

Markus Ring

A method for producing steel products () with optimum surface quality wherein the molten steel () is produced in a process route () that is selected according to a desired final microstructure (), by melting in a furnace () with an electrode system (), and in a vacuum degassing system; or by melting in a furnace installation () or an individual furnace vessel (), in a ladle furnace (), and in a differential-pressure vacuum degassing system (); or by melting in a furnace () with additions of alloying materials (), a partial-quantity degassing in the ladle furnace (), or a vacuum degassing system () and a ladle degassing ().

Method and installation for producing steel products with optimum surface quality

Disclosed are a method and an installation for producing steel products () having an optimum surface quality, especially extremely low carbon contents (UCL steel or IF steel), nitrogen contents, total oxygen contents, high-strength or stainless steel qualities. According to the invention, the liquid steel is cast into a thin slab () from a process route (, or) that is selected according to the desired final structure () based on an electric-arc furnace (), is descaled, cut into billets () having a partial length, optionally descaled once again, subjected to final descaling downstream from a holding furnace (), milled in a finishing mill train (), rolled up in a rolling station () located downstream from the last finishing mill stand () or downstream from a cooling section (), and the final structure () is adjusted in the cooling section () according to the desired steel quality by cooling on a run-out roller table (), whereupon the rolling stock () is completely rolled up in a second rolling station ().

Method and installation for the production of steel products having an optimum surface quality

A system provided in a high-speed continuous casting plant for casting a metallic strand for automatically operating the high-speed continuous casting plant. In the system, the stopping or slide movement, the modification of the steel level, the heat currents through the mold walls, the temperature of the liquid metal and the drawing-off speed are measured over the casting time, supplied to a computer and compared with predetermined limit values for an automatic operating mode.

Method and system for operating a high-speed continuous casting plant

The invention relates to a method for automatically opening a high-speed continuous casting plant According to said method the stopping or slide movement, the modification of the steel level, the heat currents through the mold walls, the temperature of the liquid metal and the drawing-off speed are measured over the casting time, supplied to a computer and compared with predetermined limit values for an automatic operating mode.

Automation of a high-speed continuous casting plant

For a further development a device for continuous casting of metal, in particular steel, with a metal mold with mold walls ( ) and a mold cooling device and which can remove high thermal flows and can be subjected to thermal loads and, thereble, is suitable for use at high speeds, at least one mold wall ( ) of the mold of this device should include a steel wall ( ) and a support mesh ( ) for this wall and the device further should be provided with magnetic field generator ( ) for generating a magnetic field ( ) acting on the mold steel wall ( ) via the support mesh ( ) for attracting the mold steel wall ( ) to the support mesh ( ), with the mold cooling device comprising spray cooling means.

Device for continuously casting metal, particularly steel

A process and a continuous casting installation for the production of thin slabs, preferably of steel with a predetermined solidification thickness of, e.g., 50 mm, in which an optimum surface quality and internal quality of the strand with minimal and predetermined solidification thickness and plant capacity, and accordingly minimal rolling effort, is achieved by a qualitative adjustment of casting and rolling in the region of the strand guide, oscillation of the casting mold by a hydraulically operated lifting platform, feeding of casting powder to the mold, and an immersion nozzle with a specific cross sectional area of flow relating to the process and continuous casting installation, resulting in a satisfactory supply of casting slag and bath movement in the cast surface compared with a standard slab with a thickness of 200 mm. These conditions from the crater end to the cast surface exert a direct influence on the superficial and internal quality of the strand and on the reliability of the casting process.

Continuous casting facility and process for producing thin slabs

A method for producing coated strands of metal includes guiding a metal strand through the bottom of a vessel filled with a molten mass of the same or different composition as the metal strip, wherein the residence time of the metal strand is selected as a function of at least one of the molten bath level, the casting speed, the metal strand thickness, and the preheating temperature of the metal strand such that the deposited molten mass on the metal strand has a desired thickness of several times the initial thickness of the metal strand. After exiting from the molten bath, the metal strand with a layer crystallized thereon is subjected to a smoothing path carried out when the surface temperature of the strand crystallized thereon is smaller than the solidus temperature of the molten bath, so that at least the surface of the layer crystallized thereon is solidified. The crystallized layer is applied with a thickness which exceeds the desired final thickness of the coated strand. Between the molten bath and the beginning of the solidification while still in the doughy state of crystallization, stripping of the crystallized layer is carried out to a controlled uniform smaller thickness over the length of the strand.

Method and device for producing coated metal strands, especially steel strips

Method and device for thermal control of a continuous casting mold

A method and an apparatus for producing slabs in a continuous casting plant preferably equipped with a vertical mold, preferably for thin slab plants for casting preferably steel having, for example, a solidification thickness of 60 mm-120 mm, for example, 80 mm, and casting speeds of up to 10 m/min. and a maximum casting output of about 3 million tons per year. In a first vertically extending first segment of a strand guide, exclusive strand reduction, also called casting and rolling, is carried out. The segment arranged immediately underneath the first segment carries out bending of the strand through several bending points into the inner circular arc. Prior to final solidification, the strand is bent back through several return bending points into the horizontal.

Method and apparatus for producing thin slabs in a continuous casting plant

A continuous caster is controlled by a method anticipating the liquidus temperature in the mold of the caster to prevent premature solidification. The temperature in the tundish is measured and based upon the tundish temperature and the resistance time of the molten metal in the tundish, an equivalent liquidus temperature window is defined and the speed of the continuous caster is controlled to maintain this window of operation of the tundish.

Method of and apparatus for automatically controlling operation of a continuous casting plant

A guide element of a continuous casting plant, particularly a continuous casting plant for thin slabs, for guiding a metal strip in a strand guiding direction includes a pair of guide rollers which are located opposite each other relative to the metal strip and form a roller gap. The pair of guide rollers is provided with an adjusting device for adjusting a crown of the roller gap.

Guide element of a continuous casting plant

The invention relates to a pig casting machine comprising at least one endless conveyor belt ( ), on which pig casting molds ( ) are fixed, for conveying pig casting molds from a casting station ( ) to a pig removal station and vice versa, wherein each pig casting mold is filled with molten metal as it passes through the casting station with the mold cavity facing upwards, in addition to a device for cooling the pig casting molds before, during and/or after casting, wherein the pig casting molds are embodied having a thin wall. According to the invention, in order to increase output and to be able to cast heavy metals in such a pig casting machine, the pig casting molds ( ) are designed to receive molten metal at a melting temperature above 1,000&deg; C.

Pig casting machine

A direct-current arc furnace for producing steel has a smelting vessel with electrodes, tapping openings for the molten mass and slag, and a device for a direct removal of exhaust gases. The smelting vessel is extended upwardly by a central shaft for introducing melt-down material into the vessel. The extension of the central shaft forms a melt-down material column. A shaft suction device is provided as an extension of the shaft for removal of the exhaust gases during the smelting process. Adjacent to the shaft openings are provided in the upper part of the smelting vessel for receiving a vessel suction device for dust and/or gases resulting during the charging process of the melt-down material. The shaft suction device and the vessel suction device are connected to a common device and switching elements are provided for actuating only one suction device and/or adjusting a combination of the exhaust gas flows dependent on the charging and smelting process.

Direct-current arc furnace comprising a centric charging shaft for producing steel and a method therefor

In a method for sealing a tap opening in a metallurgical container a plug with a plug sleeve and a refractory flowable material is provided having a metal rod or pipe surrounded by a protective pipe connected thereto. The plug sleeve and the protective pipe are made of a material resistant to a molten mass of metal in the metallurgical container only for a short period of time. The material is a temporarily heat-insulating material which cokes within the molten mass of metal and is cardboard or wood. The time of introduction of the plug sleeve is controlled based on measured parameters of the molten mass. The plug is introduced into the tap opening by guiding the plug with the metal rod or pipe through the molten mass in the metallurgical container. The plug sleeve changes by temperature action of the molten mass of metal such that the flowable material is distributed in the tap opening and seals the tap opening. The tap opening is then closed from the exterior of the metallurgical container and the plug sleeve in the tap opening as well as the protective pipe are coked and destroyed.

Method and device for sealing a tap hole in metallurgical containers

Continuous casting facility and process for producing rectangular thin slabs

Growing community of inventors

Duisburg, Germany

Fritz-Peter Pleschiutschnigg