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Control apparatus for alternating-current reduction furnaces

A technology of control device and reduction furnace, which is applied to electric heating device, control/regulation system, electrical components, etc., can solve the problems of uneven input of electric energy into electric furnace and difficult formation of reaction space.

Active Publication Date: 2008-01-02
SMS DEMAG AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the electric energy is unevenly input into the electric furnace
In addition, due to the local very violent electrode movement, it is difficult to form a reaction space in the furnace.

Method used

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  • Control apparatus for alternating-current reduction furnaces
  • Control apparatus for alternating-current reduction furnaces
  • Control apparatus for alternating-current reduction furnaces

Examples

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Embodiment Construction

[0042] FIG. 1 shows a control system 1 according to the invention, which has a monitor 2 , a current regulator 3 , a phase angle controller 4 and a voltage regulator 5 . For control, it is connected to a personal computer 6, for example.

[0043] However, only one phase of the three-phase system is shown in FIG. 1 .

[0044] The furnace switch 8 connects the furnace, which will be described below, to a supply voltage 10 via an operating current line 7 by means of an electric motor 9 . This supply voltage is applied to the primary side of a furnace transformer 11 , the load step-switching of which can be regulated by means of a regulating device 12 via the regulating system 1 .

[0045] On the secondary side of the furnace transformer 11 is connected an electronic AC switch, power semiconductor 13 , which is connected to an electrode 14 which can be immersed in the molten bath of a grounded furnace 15 .

[0046] The power semiconductor 13 comprises two power electronic switch...

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Abstract

The invention relates to a control apparatus for alternating-current reduction furnaces (15) having electrodes (14), which control apparatus has a transformer (11) and a regulating system (1) for the controlled introduction of power into the alternating-current reduction furnaces (15), which regulating system controls an adjusting apparatus (17) for the electrodes (14), wherein the control apparatus also has controllable power-electronics alternating-current switches (13) which are connected into the high-current conductor at the secondary end and are connected to the regulating system (1) via an ignition line (16) for supplying controlling ignition pulses, and wherein the control apparatus is designed in such a way that brief fluctuations in the electrical parameters are compensated for only by the alternating-current switches (13).

Description

technical field [0001] The invention relates to a control device for an AC reduction furnace with electrodes. The control device has a transformer and an adjustment system for controlling the input of electric energy into the AC reduction furnace. The adjustment system is used to control the adjustment device for the electrodes. Background technique [0002] These electric reduction furnaces are used for the production of non-ferrous metals, ferroalloys and slags, with six electrodes with paired single-phase connections or with three electrodes with knapsack connection or star connection. [0003] The regulation of the electrical energy fed into the reduction furnace has hitherto been effected by hydraulic regulation of the electrodes. In this case, the bath resistance is influenced by changes in the depth of insertion of the electrodes into the charge and / or in arc operation by changes in the resistance ratio below the electrodes. The electrode current measured at the prim...

Claims

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Application Information

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IPC IPC(8): H05B7/148
CPCH05B7/148Y02P10/25G05F1/56H05B7/144
Inventor T·帕施J·孔策D·博格瓦特
Owner SMS DEMAG AG
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