Siemens Aktiengesellschaft

Primetals Technologies Germany Gmbh

Arno Döbbeler

Werner Hartmann

Thomas Matschullat

Martin Pieschel

Hans-Joachim Knaak

Martin Hergt

Jürgen Rupp

Detlef Rieger

Wolfgang Meusel

Klaus Krüger

Uwe Stürmer

Wolfgang Hörger

Jonas Pinkwart

Björn Dittmer

Dieter Fink

Martin Biermann

Johannes Scharf

Gerd Schelbert

Ralf Engels

Ralph-Herbert Backes

Sascha Leadbetter

Klaus KRÜGER

At least one measurement value of a measurement variable characterizing the operating state of each of a plurality of system components that influence the operating conditions of an arc furnace is detected and compared to a respective currently permissible threshold value for the measurement variable. A maximum power that can be supplied to the arc furnace within a time window while satisfying all currently permissible threshold values is determined based on the result of the comparison.

Method for operating an arc furnace and smelting system having an arc furnace operated according to the method

In a method for operating an electric arc furnace operated with an alternating voltage, a structure-borne sound signal occurring on a wall of the electric arc furnace is detected, from which structure-borne sound signal a parameter characterizing the flicker properties of the electric arc furnace is calculated. At least one process variable of the electric arc furnace is controlled on the basis of the calculated parameter. An electric arc furnace operated according to the method is used in and for a melting plant.

Method for operating an electric arc furnace and melting plant having an electric arc furnace operated according to said method

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 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

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

A device for controlling an arc furnace installation has an automatic controller () wherein a functional unit () for furnace control, a functional unit () for electrode control and a functional unit () for melting control are integrated in the controller ().

Device for controlling an arc furnace installation

A reactance ballast device (V), in particular for an arc furnace, has an induction coil () and a free-standing load stepping switch (), with the load stepping switch () being designed to adjust the reactance of the induction coil () while on load. A transformer (T), in particular for an arc furnace (O), has an associated reactance ballast device (V) of the type mentioned initially. An arc furnace (O), in particular for steel smelting, is preceded by a transformer (T) such as this.

Reactance ballast device

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Herzogenaurach, Germany

Arno Döbbeler