The Method of Automatically Tracking the Liquid Level Trajectory of the Melting Pool by the Electrode Working Point of Submerged Arc Furnace
An automatic tracking and power point technology, applied in electric heating devices, electrical components, heating through discharge, etc., can solve the problem of inability to directly detect the material layer current and arc current, and achieve stable temperature balance, high production effect, and stable operation. Effect
Active Publication Date: 2016-02-03
崔乔
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Problems solved by technology
But how can we control the proportional distribution between the two? It has always been the goal pursued by many scientific research institutions and experts in the industry, because it is impossible to directly detect the material layer current and arc current, so there is still no definite answer
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[0038] A method for automatically tracking the liquid level trajectory of a molten pool at the electrode work point of a submerged arc furnace, comprising the following steps:
[0039] The first step, real-time collection of parameters: electrode voltage U, electrode current I t , electrode displacement Hd, power factor cos:
[0040] The specific collection methods are:
[0041] (1) The three-phase alternating current of the power grid is connected to the primary of the submerged arc furnace transformer through the isolation switch and the vacuum switch. After transformation, the three-phase alternating current of 80V to 500V is output on the secondary side of the transformer. The large cross-section short net, the conductive device and the graphite electrode are connected, and enter the submerged arc furnace to provide electric power;
[0042] (2) A current transformer is installed on the primary or secondary side of the transformer to output an AC current signal of 0-5 amp...
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The invention discloses a method for automatically tracking liquid level track of a melting bath at electrode working points of a submerged arc furnace. The method comprises the following steps: automatically controlling the operation according to a constant power strategy in the discharge stage and the furnace temperature recovery stage through analyzing the process characteristics of each smelting stage of the submerged arc furnace; in the maximum power stage, the secondary power state and the before-discharge stage, controlling electric lifting through a strategy of tracking lifting same trend lifting automatic operation of the liquid level track of the melting bath according to three-phase electrode arc working points; and respectively using different automatic control strategies to realize that the electrode arc working points at various smelting stages of the submerged arc furnace are located on the same plane for full-automatic operation all the time so as to obtain the production increasing and energy saving effects. The method has the benefit that the three-phase electrode arc power is controlled to be kept in a balance state all the time in the whole process by using different automatic control principles and methods at different smelting states of the submerged arc furnace, so that the aims of improving the electric and thermal efficiencies, reducing the smelting power consumption and improving the output are obtained.
Description
technical field [0001] The invention relates to a method for automatically tracking the track of the molten pool liquid level at the electrode work point of a submerged arc furnace. Background technique [0002] The submerged arc furnace is a kind of electric arc furnace series and belongs to the submerged arc furnace. The three-phase electrodes are respectively inserted into the furnace charge about one meter deep, and the mixed charge with carbon materials connects the three-phase electrodes two by two. The arc current is generated by the discharge between the electrode tip and the liquid surface of the molten pool. Material layer branch current and electrode end arc current are the characteristics of submerged arc furnace smelting, and also the key difference from steelmaking electric arc furnace. [0003] The products smelted by the submerged arc furnace include ferrosilicon, silicon-manganese alloy, chromium deficiency, calcium carbide, yellow phosphorus, corundum, et...
Claims
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IPC IPC(8): H05B7/148
CPCY02P10/25
Inventor 崔存生崔乔
Owner 崔乔