Liquid level control method of continuous casting machine

A technology of liquid level control and liquid level controller, which is applied in the direction of liquid level control, non-electric variable control, control/regulation system, etc., can solve problems such as crystallizer liquid level instability, and achieve the effect of increasing the controllable range

Inactive Publication Date: 2015-01-14
CHINA STEEL
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Problems solved by technology

Since the existing control laws cannot develop corresponding parameter designs for various variations, the liquid level of the mold of the continuous casting machine is still unstable.

Method used

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  • Liquid level control method of continuous casting machine
  • Liquid level control method of continuous casting machine
  • Liquid level control method of continuous casting machine

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Embodiment Construction

[0017] Please also refer to figure 1 and figure 2 , figure 1 It is a schematic flow chart illustrating a liquid level control method 100 for a continuous casting machine according to an embodiment of the present invention, figure 2 It is a schematic diagram illustrating a liquid level compensation system 200 of a continuous casting machine according to an embodiment of the present invention. The liquid level compensation system 200 of this embodiment uses the liquid level control method 100 to compensate for the actual value of the liquid level, so as to increase the controllable range of the continuous casting machine to the liquid level of the mold. The compensation device 210 includes a compensation decision logic module 211 , a Fourier transform (Fourier transform) module 212 , a phase lead compensation controller 213 , and a phase lag compensation controller 214 . The compensation decision logic module 211 utilizes the continuous casting machine liquid level control ...

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Abstract

The invention provides a liquid level control method of a continuous casting machine. The liquid level control method of the continuous casting machine comprises the steps that first, whether compensation needs to be conducted or not is judged according to the liquid level accumulated change amount of a crystallizer in the first time; when compensation is determined to be conducted, whether the liquid level fluctuation main frequency of the crystallizer is larger than a preset frequency threshold value or not is judged, and accordingly a compensation controller is determined; then, the compensation controller is used for compensating the first liquid level practical value of the crystallizer in the first time, and a first compensated liquid level practical value can be acquired; then, the liquid level of the crystallizer is controlled by the liquid level controller according to the first compensated liquid level practical value; the liquid level fluctuation amplitude of the crystallizer is calculated, and the compensation strength of the compensation controller is adjusted according to the liquid level fluctuation amplitude; at last, a second liquid level practical value is acquired in the second time, and the second liquid level practical value is compensated.

Description

technical field [0001] The invention relates to a method for controlling the liquid level of a continuous casting machine, in particular to a method for controlling the liquid level of a mold of a continuous casting machine. Background technique [0002] Continuous Caster (Continuous Caster) is a metal casting equipment using continuous casting technology, which directly solidifies liquid molten metal and rolls it into metal sheets. Generally speaking, a continuous casting machine includes a distributor, a crystallizer, a roller table, etc., and the stability of the metal liquid level (such as the liquid steel level) in the mold has a great influence on the quality and production efficiency of the billet. Therefore, the current continuous casting machines all use a proportional-integral-derivative (PID) controller to stabilize the liquid level of the mold. For example, provide a preset liquid level setting value to the PID controller, so that the PID controller can control ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D9/12B22D11/18
Inventor 陆振原陈明宏叶东发曾国栋
Owner CHINA STEEL
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