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

A signal processing device, electric arc furnace technology, applied in furnace control devices, electric heating devices, electric furnaces, etc., can solve problems such as difficult and strong interventions

Active Publication Date: 2012-07-25
PRIMETALS TECH GERMANY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Because the above-mentioned measures influence each other, it is of course difficult to estimate how strongly the intervention should be carried out in the process when human beings intervene in the operating procedures of the electric arc furnace

Method used

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

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Embodiment Construction

[0026] The electric arc furnace 11 has a furnace vessel 12 which is filled, not shown, with melt (scrap). Preferably, three electrodes 13 protrude into the furnace vessel, which electrodes can be raised or lowered horizontally along their longitudinal axes by means of actuators 14 (hydraulic motors or servo motors). The electrodes 13 are supplied with three-phase electricity via a furnace transformer 15 , wherein each electrode 13 can moreover be associated with an additional reactor 16 so that said additional reactor 16 can generate lost electrical power in a targeted manner. Furthermore, a burner 17 is schematically illustrated, with which chemical energy can be introduced into the furnace vessel 12 by burning fuel. A lance 18 also protrudes into the furnace vessel 12 , wherein gas can be blown into the furnace vessel and thus into the furnace charge by means of a pump 19 .

[0027] To melt the melt 20 in the form of metal scrap in the electric arc furnace 11 , an electric ...

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Abstract

The invention relates to a method for controlling a melt process in an arc furnace (11) and signal processing component (21), program code, and data medium for performing said method. According to the method, sound signals or vibrations from the interior of the furnace container (12) are captured by means of solid-borne sound sensors (22), from which characteristic values can be derived for the distribution of melting material, melt, and slag in the furnace fill. A characteristic value SM for thermal radiation impinging on the furnace wall of the container, a characteristic value M for the lumpiness of the melting material in the volume of furnace fill, and a characteristic value MM for the change to the portion of solid melting material contacting the furnace wall are generated in priority sequence. According to the invention, the energy distribution at the electrodes (13) is changed by means of a control system (21) analyzing the characteristic values in priority sequence, such that thermal load peaks are dampened or even completely prevented. To this end, the strand impedances stored as target values are modified. If said control is not sufficient, then the thermal power of the arc is reduced as a subordinate means. A rapidly and reliably effective operating regime for the processes in the arc furnace (11) can thereby be implemented.

Description

technical field [0001] The invention relates to a method for controlling a melting process in an electric arc furnace with at least two electrodes, wherein information about the melt, the molten liquid is generated by evaluating air-acoustic signals and / or structure-borne acoustic signals passing through the interior of the furnace vessel and the following eigenvalues ​​for at least one type of slag distribution. Characteristic values ​​of the first type represent the shielding of thermal radiation occurring on the furnace walls of the furnace vessel. Characteristic values ​​of the second type represent the lumpiness and melting state of the melt within the volume of the furnace filling, in particular in the region below the electrodes (hereinafter simply referred to as lumpiness). A third type of characteristic value represents a change in the portion of the melt located on the furnace wall. [0002] Furthermore, the invention relates to a signal processing device for an el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B7/148
CPCC21C5/5211F27D21/00H05B7/148F27B3/28C21C2300/06F27D19/00C21C2005/5288Y02P10/20Y02P10/25
Inventor B.迪特默A.多布勒K.克鲁格S.利德贝特T.马特舒拉特D.里格
Owner PRIMETALS TECH GERMANY
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