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

A technology for melting equipment and electric arc furnaces, which can be used in lighting and heating equipment, furnaces, electric heating devices, etc., and can solve problems such as grid disturbance.

Active Publication Date: 2014-03-26
PRIMETALS TECH GERMANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, e.g. waste movement and waste avalanche (Schrotteinstürzen) generation of disturbances to the grid by consumers

Method used

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

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Embodiment Construction

[0030] according to figure 1 , the melting plant according to the invention comprises an electric arc furnace 2 having, for example, three electrodes 4 a - c which are electrically connected to a furnace transformer of a power supply 6 . The electrodes 4a-c are sunk into a furnace vessel 8 containing the scrap 7 to be melted, on the wall 9 of which a plurality of structure-borne sound receivers 10 are arranged. The structure-borne sound signal S detected by the structure-borne sound receiver 10 is transmitted to a control and evaluation device 12 for further processing.

[0031] In addition to the structure-borne sound signal S, the current flowing in the electrode 4 and / or the voltage applied thereto is measured by means of the measured value receivers 14 a - c and a corresponding measurement signal M is transmitted to the control and evaluation device 12 . In this control and evaluation device, a control signal C is generated, by means of which at least one process variable...

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PUM

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Abstract

For a method for operating an electric arc furnace (2) operated with an alternating voltage and for a melting plant having an electric arc furnace (2) operated according to said method, a structure-borne sound signal (S) occurring on a wall of the electric arc furnace (2) is detected, from which structure-borne sound signal a parameter (K) characterizing the flicker properties of the electric arc furnace (2) is calculated, and at least one process variable of the electric arc furnace (2) is controlled on the basis of the calculated parameter (K).

Description

technical field [0001] The invention relates to a method for operating an electric arc furnace. Furthermore, the invention relates to a melting plant with an electric arc furnace operated according to the method. Background technique [0002] In an electric arc furnace, the bulk melt, usually metal scrap, is melted, optionally together with further additive materials, by means of an electric arc ignited between the melt and at least one electrode. [0003] It is pointed out here that, first of all, electric arc furnaces in which only scrap is actually added produce undesired counteractions of consumers. Compensation devices, so-called SVC systems or static short-circuit compensators, are therefore installed in steelmaking plants for this purpose in order to reduce counteractions of consumers, such as higher harmonics or so-called flicker and to comply with international regulations the boundary value of . However, such SVC systems only react subsequently to disturbances t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B7/148F27B3/28
CPCF27B3/085F27B3/20H05B7/148F27B3/28F27D2099/0021Y02P10/25
Inventor 阿尔诺·德贝勒迪特尔·芬克德特勒夫·里格尔
Owner PRIMETALS TECH GERMANY
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