Siemens Aktiengesellschaft

Primetals Technologies Germany Gmbh

Primetals Technologies Austria Gmbh

Thomas Matschullat

Werner Hartmann

Klaus Weinzierl

Detlef Rieger

Klaus Krüger

Günter Lins

Johannes Dagner

Manfred Baldauf

Matthias Kurz

Detlef Gerhard

Martin Hergt

Arno Döbbeler

Jörg Lengert

Günther Winter

Andreas Maierhofer

Wolfgang Meusel

Uwe Stürmer

Hans-Herbert Welker

Arno Doebbeler

Josef Hofbauer

Björn Dittmer

Dieter Fink

Thomas Kuehas

Kurt Herzog

Ralf Engels

Hans-Jürgen Oeynhausen

Klaus Pronold

Guenther Winter

Günther Winder

Sascha Leadbetter

Reinhard Sesselmann

Hanno Garbe

Martin Biermann

Dieter Bettinger

Johannes Scharf

Gerd Schelbert

Vico Haverkamp

Klaus KRÜGER

A rolling mill has a rolling stand () in which a flat rolled product () composed of metal is rolled. A sensor device (), which detects at least one measured variable (M) characteristic of a material property of the flat rolled product (), is arranged upstream and/or downstream of the rolling stand (). The material property can be, in particular, an electromagnetic property or a mechanical property of the rolled product (). The sensor device () transfers the detected measured variable (M) to a control device () for the rolling mill. Taking into account the measured variable (M), the control device () determines a control value (A) for the rolling stand (). The control of the rolling stand () influences the material property of the flat rolled product (). The control value (A) is a ratio of the peripheral speeds (vO, vU) at which the upper and the lower working rolls () of the rolling stand () rotate.

Rolling mill with rolling dependent on material properties

An automation system () determines control data (S'), outputs same to controlled elements () of the facility (ANL) and thereby controls the facility (ANL). Sensor devices () acquire measurement data (M) of the facility (ANL) and at least partly feed same to the automation system () and a man-machine interface (). Said man-machine interface () receives planning data (P) from a production planning system () and/or control data (S&#x2032;) and/or internal data (I) from the automation system (). The interface outputs the data (M, S&#x2032;, I) to a person (). It furthermore receives control commands (S) from the person () and forwards them to the automation system (). The automation system () processes the measurement data (M) and the control commands (S) when determining the control data (S&#x2032;). An artificial intelligence unit () receives at least part of the measurement data (M), control data (S&#x2032;) and/or internal data (I) and the data output to the person (). It also receives the control commands (S). The artificial intelligence unit () processes the data (M, S&#x2032;, I) and control demands (S) received and determines evaluation results (A) therefrom and makes the latter available to the person () and/or to the production planning system () and/or sets them for the automation system () in the form of control commands (&#x2033;) directly or via the man-machine interface (). The data (M, S&#x2032;, I) received by the artificial intelligence unit () are at least to some extent dimensional data. Said dimensional data (M, S&#x2032;, I) comprise at least one image captured by a sensor device () or an image output via the man-machine interface (), part of such an image, a time sequence of such images or a time sequence of a part of such images or an acoustic oscillation or an acoustic oscillation spectrum.

Use of comprehensive artificial intelligence in primary industry plants

Flicker values to be expected may be determined and achieve a high probability from suitable state and operating variables which are acquired during the first minutes in the initial smelting phase. In this way, flicker can effectively be reduced and kept below predefined limiting values. This is in particular suitable during steel production using electric arc furnaces.

Flicker reduction in electric arc furnaces by means of flicker prediction from the state determination in the initial phase of the smelting process

A computer determines a thickness and/or a temperature of a metal strip. The computer determines the temperatures occurring along a respective rotation part of the respective surface elements of the rotary elements and a rotary element shape which forms in the region of a draw-off point on the respective surface element, by a respective rotary element model and using an exchanged enthalpy quantity, the respective contact time with a metal and a respective cycle time exchanged per time unit of a respective rotary element of a casting device with the environment thereof. The temperature of the metal situated in the die region, and the heat flow from the metal to the respective surface element, are determined by a respective metallurgical solidification model and using a metal temperature, the temperatures of the surface elements, the rotary element shape and characteristic metal values.

Modelling of a cast rolling device

Molten metal poured into a mold region, delimited by a first casting roll that rotates about a first rotational axis, produces a metal strand upon solidification which is conveyed out of the mold region. A liquid coolant is applied to the surface of the first casting roll by a first cooling device via first coolant lines and first coolant applying devices. The coolant is inert with respect to the molten metal and has a standard boiling point below 20&#xb0; C., e.g., &#x2212;20&#xb0; C., at normal air pressure, and an operating temperature at or below an operating boiling point at an operating pressure at which the coolant is supplied. A control device automatically controls the first cooling device by ascertaining a control state of the first cooling device using a target property for an actual property of the first casting roll or the metal strand detected by at least one sensor.

Roll casting method with cryogenic cooling of casting rolls

A method for controlling a melt process in an arc furnace, including a signal processing component, program code, and data medium for performing the method. Sound signals or vibrations from the interior of the furnace container are captured by solid-borne sound sensors, from which characteristic values can be derived representing the distribution of melting material, melt, and slag in the furnace fill. A characteristic values are generated in priority sequence for: thermal radiation impinging on the furnace wall of the container, the lumpiness of the melting material in the volume of furnace fill, and the change to the portion of solid melting material contacting the furnace wall. The energy distribution at the electrodes is chanced by a control system based on the characteristic values in priority sequence, such that thermal load peaks are dampened or even completely prevented.

Method for controlling a melt process in an arc furnace and signal processing component, program code and data medium for performing said method

In a method for determining a state variable of an electric arc furnace, especially for determining the level of the foamed slag () in a furnace, the energy supplied to the furnace is determined with the aid of at least one electric sensor while solid-borne noise is measured in the form of oscillations on the furnace. The state variable is determined by a transfer function which is determined by evaluating the measured oscillations and evaluating measured data of the electric sensor. The state of the foamed slag level can thus be reliably recognized and be monitored over time. The foamed slag level is decisive for the effectiveness with which energy is fed into the furnace. Furthermore, losses caused by radiation are reduced by covering the arc with the foamed slag. The improved measuring method allows the foamed slag level to be automatically controlled or regulated in a reliable manner.

Method for determining at least one state variable of an electric arc furnace, and electric arc furnace

In a method for operating an arc furnace () with at least one electrode (), a solid material fed to the arc furnace () is melted by an arc () formed by the at least one electrode (). A measurement (MM) for the mass of one part of the solid material arranged on a boundary () of the arc furnace () is determined, and using the determined measurement (MM), a process variable of the arc furnace () is controlled and/or regulated. A method which can reduce the risk of electrode damage caused by metal scraps falling into the treated area is provided.

Method for operating an arc furnace comprising at least one electrode, regulating and/or control device, machine-readable program code, data carrier and arc furnace for carrying out said method

A method for treating a carbon dioxide-containing waste gas from an electrofusion process, in which a hydrocarbon-containing gas is fed to a waste gas and the carbon dioxide in the waste gas is converted at least partially into carbon monoxide and hydrogen in a reaction and the carbon monoxide-hydrogen mixture is stored for an additional combustion process.

Method for treating a carbon dioxide-containing waste gas from an electrofusion process

In a device and a method for recovering energy from at least one metal hot strip bundle (B) which has a temperature of more than 200&#xb0; C. and is produced in a hot rolling mill (H), the at least one hot strip bundle (B) passes through an energy recovery device (). In order to recover energy, a gaseous medium (G) flows around the at least one hot strip bundle (B) within the energy recovery device () such that said hot strip bundle absorbs energy, particularly heat, dissipated by the at least one hot strip bundle (B), thereby providing a technically simple method and a corresponding device for recovering energy, both of which can be used for any kind of hot strip, independently of the further processing thereof. Furthermore, CO2 and energy can be saved.

Method and device for recovering energy from a hot strip bundle

In a method and a device for utilizing heat transported by a discontinuous flow of exhaust gases (), the discontinuous flow of exhaust gases () is emitted in phases (P1, P2, P3, P4, P5) with, in each case, constant output values for volume flowing (Va) and temperature (Ta) from an industrial installation, particularly an industrial furnace, wherein the discontinuous flow of exhaust gases () is converted into a continuous working flow () with adjustable, constant target values for the volume flowing (Vz) and the temperature (Tz). The continuous working flow (), with the heat contained therein, is used for the conversion of thermal energy into useful energy.

Method and device for utilizing heat transported by a discontinuous flow of exhaust gases

A device for introducing dust into a molten bath of a pyrometallurgical installation is provided. An electrodeless plasma torch includes an essentially tubular housing, wherein the housing allows a passage of a carrier gas containing dust particles, and wherein the housing is coaxially surrounded by an inductive load coil which forms a heating zone.

Method and device for introducing dust into a metal melt of a pyrometallurgical installation

A melting furnace for smelting scrap includes a heating device extending through a wall of the furnace in order to supply melting energy, wherein the heating device including a tubular body, which encloses a flow channel. Further, the furnace includes a heating zone formed by a longitudinal section of the tubular body configured as an electrodeless plasma torch including an inductive heating coil which encloses the flow channel coaxially. An injection pipe is disposed in a central manner in the flow channel extending up or into to the heating zone, wherein the injection pipe is enclosed by a gas guiding pipe coaxially and at a radial distance. An annular channel is arranged between the injection pipe and the wall of the flow channel for supplying a cooling gas.

Method and furnace for melting steel scrap

In a method, a variable characterising an operational state of an electrode of an arc furnace can be determined. An electrode flow guided to the electrode is detected in the method and the structure-borne noise oscillations are detected. From the detected electrode flow, a flow evaluation signal associated with the frequency range of the detected electrode flow is determined. From the detected structure-borne noise oscillations, an oscillation evaluation signal that is associated with a frequency range of the detected structure-borne noise oscillations is detected and a quotient from the oscillation evaluation signal and the flow evaluation signal is formed as a radiation measurement for at least one frequency common to the detected electrode flow and the detected structure-borne noise oscillation.

Method for determining a radiation measurement for thermal radiation, arc furnace, a signal processing device programme code and storage medium for carrying out said method

In a method for determining the size and shape value (M) for a solid material (S), in particular scrap metal, in an arc furnace (), an electrode flow fed to an electrode () for forming an arc furnace (L) between the electrode () and the solid (S) is measured () and from the measured electrode flow (I (t)), an effective measurement value of the electrode flow is determined () and from the measured electrode flow (I (t)) (), a flow part associated with a frequency range of the measured electrode flow is determined (), and a quotient of the flow part and an effective measurement value is formed as a measurement of the shape and size value of the flow (M). Thus, a method is provided that enables a property of a fusible element introduced into one of the arc furnaces to be determined.

Method for determining the size and shape measure of a solid material in an arc furnace, an arc furnace, a signal processing device and program code and a memory medium

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Eckental, Germany

Thomas Matschullat