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Method for measuring electrode current of buried arc furnace

A technology of electric furnace electrode and measurement method, which is applied in the direction of measuring device, measuring electric variable, measuring current/voltage, etc., can solve the problems of large smoke and dust, open flame, unsuitable installation of testing equipment, etc., and achieves low cost, high accuracy, and measurement Method reliable effect

Active Publication Date: 2010-12-08
BERIS ENG & RES CORP
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Problems solved by technology

[0018] In order to reduce the length of the high-current loop of the electric furnace, reduce the voltage drop of the loop and power consumption, the position of the joint point (combustion ring) between the short net and the electrode of the general electric furnace is relatively low, and the ambient temperature here is relatively high (generally around 600°C), and There are open flames and heavy smoke, so it is not suitable for installing testing equipment

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  • Method for measuring electrode current of buried arc furnace
  • Method for measuring electrode current of buried arc furnace
  • Method for measuring electrode current of buried arc furnace

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Embodiment Construction

[0033] Large-scale electric furnace transformers are divided into two main methods according to the voltage regulation method: the on-load voltage regulation method of the series transformer and the on-load voltage regulation method of the autotransformer, such as Figure 3A and Figure 3B Shown is a schematic diagram of the existing pressure regulation method.

[0034] Refer to Figure 3A , the transformer is composed of main transformer T1 and series transformer T2, main transformer T1 has three windings, among which winding 3 is a voltage regulating winding, which provides power for the primary side (winding 4) of series transformer T2; main transformer and series transformer secondary winding ( The voltage of winding 2 and 5) is the working voltage of the furnace after adding and subtracting the voltage.

[0035] See Figure 3B , the transformer consists of an auto-tuning transformer T1 and a main transformer T2, the winding of the auto-tuning transformer T1 is divided ...

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Abstract

The invention relates to a measurement method of electrode current of a submerged arc furnace, and the measurement method comprises: a current transformer is connected with a voltage regulation coil of a furnace transformer for measurement to measure the three-phase current of the secondary side of the current transformer, and the vector superposition is carried out on the three-phase current of the secondary side to obtain the electrode current which enters the furnace. Therefore, the measurement method of the electrode current of the submerged arc furnace has reliability, high accuracy, lowcost, simpleness and easy operation.

Description

technical field [0001] The invention relates to a method for measuring current, in particular to a method for measuring electrode current of a submerged arc electric furnace. Background technique [0002] Submerged-arc electric furnaces are widely used in the smelting of industrial products such as yellow phosphorus, calcium carbide, and ferroalloys. The current electrode current of electric furnaces has changed from tens of thousands of amperes in the early days to nearly hundreds of thousands of amperes at present. The distribution is relatively large, the transformation and phase jump of the short network connection mode in front of the furnace, the asymmetry of the three-phase current, the frequent on-load voltage regulation of the transformer and the frequent change of the transformation ratio, the smelting environment and other factors make the electrodes of the submerged arc electric furnace It is difficult to measure the furnace current. [0003] The products produc...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/00
Inventor 刘广文
Owner BERIS ENG & RES CORP