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Method for aotomatic controlling rise fall of electrodes in mine hot stove

An electrode lifting, submerged arc furnace technology, applied in the direction of electrical program control, computer control, general control system, etc., can solve the problems of inability to save electricity and low control accuracy, and achieve the effect of correcting deviations

Inactive Publication Date: 2006-12-06
成都高威节能科技有限公司
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  • Abstract
  • Description
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Problems solved by technology

Its disadvantage is that it uses analog signals for control, its control accuracy is not high, and it cannot achieve the purpose of saving electricity.

Method used

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  • Method for aotomatic controlling rise fall of electrodes in mine hot stove

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Embodiment Construction

[0021] see figure 1 , a method for automatic control of submerged arc furnace electrode lifting. The 10KV three-phase alternating current of the power grid is connected to the primary of the submerged arc furnace transformer B through the isolation switch GK and the vacuum switch ZK. Phase alternating current enters the furnace to provide electric power 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.

[0022] The input signal of the present invention has: the primary or secondary of transformer B is equipped with current transformer L, the alternating current signal of output 0-5 ampere, is transformed into the direct current voltage of 0-5V (or 0-10V) through signal converter The analog signal is provided to the A / D sampling board; the other three-phase AC voltage signal is directly taken from the secondary outlet of the transformer B, which is a 0-500V A...

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Abstract

The invention relates to a method of automatically control the mine heating furnace electrode lifting. It supplies current and power to computer in data value section. It could automatically realize parameter testing and taking comparing operation to the setting value, judging and sending a set of instruction to frequency converter and control relay that drives the electrode to move up and down.

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 submerged arc furnaces. 【Background technique】 [0002] Submerged arc furnace is a kind of electric arc furnace series. The smelted products include ferrosilicon, silicon-manganese alloy, chromium deficiency, calcium carbide, yellow phosphorus, corundum, etc. The core theory of their smelting is: the formation of directional high-temperature ion flow through ionized air - Electric arc, which converts electrical energy into thermal energy, providing a temperature field high enough for the reduction reaction. [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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/02G05B15/02H05B7/156
CPCY02P10/25
Inventor 崔存生
Owner 成都高威节能科技有限公司
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