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Control method for automatic casting of plug-in continuous casting machine

A technology of automatic pouring and control method, which is applied in the field of automatic pouring control of plug-in continuous casting machines, to achieve the effect of large opening, not easy to cold steel, and to prevent quality defects and abnormal accidents

Active Publication Date: 2014-06-25
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the settings of various automatic pouring functions and process control methods have not solved the above-mentioned common problems

Method used

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  • Control method for automatic casting of plug-in continuous casting machine
  • Control method for automatic casting of plug-in continuous casting machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Confirm that the casting machine is in the casting mode, the actual casting speed of the casting machine is 0m / min, the mold liquid level detection display is 0, the sliding plate control mode is selected as semi-automatic mode, and the sliding plate opening is 100%.

[0072] When the above four conditions are satisfied, the automatic pouring starts, the length of the automatic pouring control system is 0.6m, the target casting speed of the strand is set at 0.8m / min, and the initial velocity of the strand is V1=0.35m / min.

[0073] When the molten steel in the tundish reaches a certain height, the stopper is manually judged and opened, and the pouring begins. The operator controls the steady rise of the molten steel in the crystallizer according to the steel flow situation and the countdown time of the central control.

[0074] When the crystallizer liquid level detection height = 10mm, the automatic pouring control system assigns the sliding plate opening to 60%, and at ...

Embodiment 2

[0081] Confirm that the casting machine is in the casting mode, the actual casting speed of the casting machine is 0m / min, the mold liquid level detection display is 0, the sliding plate control mode is selected as semi-automatic mode, and the sliding plate opening is 80%.

[0082] When the above four conditions are met, the automatic pouring starts, the automatic pouring control system PLC measures 0.5m, the target casting speed of the strand is set to 1.2m / min, and the initial velocity of the strand is V1=0.4m / min.

[0083] When the molten steel in the tundish reaches a certain height, the stopper is manually judged and opened, and the pouring begins. The operator controls the steady rise of the molten steel in the crystallizer according to the steel flow situation and the countdown time of the central control.

[0084] When the crystallizer liquid level detection height = 20mm, the automatic pouring control system assigns the opening of the sliding plate to 50%, and at the s...

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Abstract

The invention discloses a control method for automatic casting of a plug-in continuous casting machine. The control method includes that firstly, an automatic-casting control system judges conditions of automatic casting; if the conditions are met simultaneously, a fixed value is automatically given by a plate blank casting length counter in the automatic-casting control system; an initial casting speed is set; when molten steel in a tundish reaches a normal height, manual judgment is performed and a stopper is opened, casting is started, an operator controls the height of the stopper according to steel flow conditions and center-control countdown time to enable the molten steel in a crystallizer to smoothly rise; according to different heights detected based on liquid level of the crystallizer, the automatic-casting control system gives different openings to a sliding plate of a liquid level control system, and simultaneously sends instructions to an argon-blowing integrated system to invoke three argon modes. Argon control in each step of the casting process is performed in a linkage manner, and casting success rate and stability in casting control are guaranteed, so that quality of casting blanks during casting is improved, and various casting accidents are avoided.

Description

technical field [0001] The invention belongs to the continuous casting technology, and in particular relates to a plug-in continuous casting machine automatic pouring control method, which is used in the stopper rod and sliding plate double control system to realize the continuous casting machine automatic pouring and tundish replacement continuous pouring process. Pouring process control to prevent casting slab quality problems and production accidents caused by excessive crystallizer liquid level fluctuations and poor argon control during the process of pouring and automatic control. Background technique [0002] In the continuous casting production process, operations such as pouring and tundish replacement are relatively complicated and one of the processes that have the greatest impact on continuous casting production accidents and slab quality. Steel-making and continuous casting unit breakout and steel overflow accidents in the process of starting pouring and tundish ...

Claims

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Application Information

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IPC IPC(8): B22D11/18B22D11/08
Inventor 杨建华朱杰张菊华范英同
Owner BAOSHAN IRON & STEEL CO LTD
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