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Method for clamping electrodes of automatic electrode control system of calcium carbide furnace

An automatic control system, calcium carbide furnace technology, applied in electric heating devices, electrical components, heating by discharge, etc., can solve the problems that are not involved, and achieve the effects of precise control of power balance, increase of ore recovery rate, and reduction of smelting power consumption

Inactive Publication Date: 2009-11-04
成都高威节能科技有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, there is no relevant method for automatically controlling the electrode position of the calcium carbide furnace automatic control system within a given area near the equilibrium position (ie, electrode clamping)

Method used

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  • Method for clamping electrodes of automatic electrode control system of calcium carbide furnace

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Embodiment Construction

[0020] Such as figure 1 , a method for automatic balance of the electrodes of the calcium carbide furnace automatic control system. The 110KV (35KV) three-phase alternating current of the grid is connected to the primary of the transformer B of the submerged arc furnace through the isolation switch GK and the vacuum switch ZK, and is output in the secondary of the transformer B after transformation. The three-phase alternating current of 80V to 500V enters the furnace through a large cross-section short network composed of large cross-section copper tubes or copper plates, soft copper cables, conductive devices and graphite electrodes, and then enters the furnace to provide electric power.

[0021] A current transformer L is installed on the primary or secondary side of the transformer B, which outputs an AC current signal of 0-5 amperes, which is converted into a DC voltage analog signal of 0-5V (or 0-10V) by a signal converter and provided to A / D sampling board; the other t...

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Abstract

The invention discloses a method for clamping electrodes of an automatic electrode control system of a calcium carbide furnace. According to the requirements of a smelted product and a process of the calcium carbide furnace on voltage, current and power, the numerical value of the current or the power is sent to a computer; a control system of the computer carries out comparison operation on a parameter value detected in real time and a set value, and then sends out a group of instructions to a control relay to drive an electric motor (or a hydraulic oil cylinder) to rotate so as to drive the electrodes to move up and down; and simultaneously, the computer calculates the vertical distance of the electrodes, and when the distance of any two-phase ends of the three-phase electrodes is greater than a given value, the electrodes are clamped. The method has the advantages that the ends of the three-phase electrodes are maintained between two given planes, the three-phase arc length and power are kept basically same, and the aims of improving electric and thermal efficiency, reducing smelting electricity consumption and improving yield are achieved.

Description

technical field [0001] The invention relates to a method for automatic control of electrode lifting, in particular to a method for automatic control of electrode lifting of a calcium carbide furnace. Background technique [0002] Calcium carbide furnace is a kind of submerged arc furnace series. The smelted product is calcium carbide. The core theory of its smelting is: through ionized air to form a directional high-temperature ion flow-arc, convert electrical energy into heat energy, and provide a high enough temperature for the reduction reaction field. [0003] The state of the arc depends on the distance between the electrode tip and the discharge body, the conductivity of the discharge body, the voltage, the temperature around the electrode, and the resistance characteristics of the charge medium. During the smelting process, as the liquid level (or slag level) of the molten pool at the bottom of the furnace continues to rise, the charge often stays down, the end of th...

Claims

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Application Information

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IPC IPC(8): H05B7/148
CPCY02P10/25
Inventor 崔存生
Owner 成都高威节能科技有限公司
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