CN-116748483-B - Slab continuous casting control method, device, equipment and medium

CN116748483BCN 116748483 BCN116748483 BCN 116748483BCN-116748483-B

Abstract

The invention discloses a slab continuous casting control method, device, equipment and medium, which comprise the steps of determining a reference area of a target slag line crack in a crystallizer according to a set liquid level parameter corresponding to a current casting process and the actual state of the crystallizer, determining a target liquid level parameter of the crystallizer after the crystallizer enters a final stage in the current casting process at the lower side of the reference area, and controlling the liquid level parameter of the crystallizer to be changed from the set liquid level parameter to the target liquid level parameter in response to a trigger signal entering the final stage in the current casting process. According to the invention, the liquid level of the crystallizer of the casting machine is reasonably adjusted by using the technical characteristics of adjustable liquid level of the crystallizer, so that the solidification front edge of the casting blank in the ending process avoids the position of a slag line of the crystallizer in the casting process, meanwhile, the cooling strength of the crystallizer is increased, the temperature of the whole hot surface of the copper plate is reduced, and the scratch on the copper plate caused by irregular tail blank is avoided by double guarantee.

Inventors

XU YINGMIN
YE FEI
QIAN LONG
DU JUN
WANG ZHANWU
MIAO XIAOGUANG
WANG HONGJUN

Assignees

武汉钢铁有限公司

Dates

Publication Date: 20260505
Application Date: 20230620

Claims (7)

1. A slab continuous casting control method, characterized in that the method comprises the following steps: Determining a reference area of a target slag line crack in a crystallizer according to a set liquid level parameter corresponding to the current casting process and the actual state of the crystallizer; Determining a target liquid level parameter of the crystallizer after entering a final stage in the current casting process at the lower side of the reference region; responding to a trigger signal entering a final stage in the current casting process, and controlling the liquid level parameter of the crystallizer to be changed into the target liquid level parameter from the set liquid level parameter, so that the crystallizer completes the final stage of the current casting process in a state corresponding to the target liquid level parameter; Responding to a trigger signal entering a ending stage in the current casting process, and improving the cooling intensity of the crystallizer, wherein the improvement of the cooling intensity of the crystallizer comprises the steps of controlling the cooling intensity of the crystallizer to be improved to the maximum value; The determining the reference area of the target slag line crack in the crystallizer according to the set liquid level parameter corresponding to the current casting process and the actual state of the crystallizer comprises the following steps: Determining new slag line cracks and areas thereof generated in the crystallizer in the current casting process according to the set liquid level parameters corresponding to the current casting process; determining whether the crystallizer has old slag line cracks which are not successfully repaired and the area where the old slag line cracks are positioned according to the actual state of the crystallizer before the current casting time begins; And determining the target slag line crack from the new slag line crack and the old slag line crack according to the positions of the new slag line crack and the old slag line crack, and taking the area of the target slag line crack as the reference area.
2. The method according to claim 1, wherein the determining new slag line cracks and areas thereof generated in the crystallizer during the current casting process according to the set liquid level parameters corresponding to the current casting process comprises: And determining a new slag line crack and a region thereof generated in the crystallizer in the current casting process according to the set liquid level parameter corresponding to the current casting process and the fluctuation range of molten steel when the molten steel is contained in the crystallizer.
3. The method according to claim 1, wherein said determining, at the lower side of said reference area, a target level parameter of said crystallizer after entering the ending phase during the current casting, comprises: Determining the lowest liquid level parameter of molten steel when the molten steel is contained in the crystallizer according to the set liquid level parameter corresponding to the current casting process and the fluctuation range of the molten steel when the molten steel is contained in the crystallizer; And determining a target liquid level parameter of the crystallizer after entering a final stage in the current casting process according to the corresponding safe liquid level adjustment parameter during production and the lowest liquid level parameter of molten steel during molten steel content in the crystallizer at the lower side of the reference area.
4. The method of claim 1, wherein after the crystallizer completes the ending phase of the current casting process, the method further comprises: repairing the crack of the slag line of the crystallizer, and entering the next casting process after repairing.
5. A slab casting control apparatus for realizing a slab casting control method according to any one of claims 1 to 4, the apparatus comprising: The reference area determining module is used for determining a reference area of a target slag line crack in the crystallizer according to a set liquid level parameter corresponding to the current casting process and the actual state of the crystallizer; The target liquid level parameter determining module is used for determining a target liquid level parameter of the crystallizer after entering a final stage in the current casting process at the lower side of the reference area; The adjusting module is used for responding to a trigger signal entering the ending stage in the current casting process, and controlling the liquid level parameter of the crystallizer to be changed from the set liquid level parameter to the target liquid level parameter, so that the crystallizer completes the ending stage of the current casting process under the state corresponding to the target liquid level parameter.
6. An electronic device, comprising: A processor; A memory for storing the processor-executable instructions; wherein the processor is configured to execute to implement a slab casting control method as claimed in any one of claims 1 to 4.
7. A non-transitory computer readable storage medium, which when executed by a processor of an electronic device, causes the electronic device to perform a slab casting control method implementing any one of claims 1 to 4.

Description

Slab continuous casting control method, device, equipment and medium Technical Field The invention relates to the technical field of rolling, in particular to a slab continuous casting control method, a slab continuous casting control device, slab continuous casting control equipment and slab continuous casting control medium. Background In the continuous casting process of the sheet billet, when the casting is finished, molten steel can infiltrate into cracks of a slag line of a copper plate of the crystallizer before solidification, and as no subsequent fresh molten steel enters the cracks, the molten steel entering the cracks can be cooled and solidified in the cracks to form bulges. In the descending process of the tail blank, the bulges scratch the inner wall of the crystallizer, so that the service life of the crystallizer is shortened. Therefore, how to reduce the occurrence frequency of crystal wall scratches caused by slag line cracks is a current problem to be solved. Disclosure of Invention The embodiment of the application solves the technical problem of higher occurrence frequency of crystal wall scratches caused by slag line cracks in the prior art by providing the slab continuous casting control method, the device, the equipment and the medium, and realizes the technical effect of reducing the occurrence frequency of the crystal wall scratches caused by the slag line cracks. In a first aspect, the present application provides a slab continuous casting control method, including: Determining a reference area of a target slag line crack in the crystallizer according to a set liquid level parameter corresponding to the current casting process and the actual state of the crystallizer; determining a target liquid level parameter of the crystallizer after entering a final stage in the current casting process at the lower side of the reference area; And responding to a trigger signal for entering the ending stage in the current casting process, and controlling the liquid level parameter of the crystallizer to be changed from the set liquid level parameter to the target liquid level parameter, so that the crystallizer completes the ending stage of the current casting process under the state corresponding to the target liquid level parameter. Further, the method further comprises: and responding to a trigger signal entering a final stage in the current casting process, and improving the cooling strength of the crystallizer. Further, improving cooling strength of the crystallizer, comprising: the cooling intensity of the crystallizer is controlled to be improved to the maximum value. Further, according to the set liquid level parameter corresponding to the current casting process and the actual state of the crystallizer, determining a reference area of the target slag line crack in the crystallizer comprises the following steps: according to the set liquid level parameters corresponding to the current casting process, determining new slag line cracks and the areas thereof generated in the crystallizer in the current casting process; determining whether the crystallizer has old slag line cracks which are not successfully repaired and the area where the old slag line cracks are positioned according to the actual state of the crystallizer before the current casting time begins; And determining a target slag line crack from the new slag line crack and the old slag line crack according to the positions of the areas where the new slag line crack and the old slag line crack are located, and taking the area where the target slag line crack is located as a reference area. Further, determining a new slag line crack and a region thereof generated in the crystallizer in the current casting process according to a set liquid level parameter corresponding to the current casting process, including: and determining new slag line cracks and the area thereof generated in the crystallizer in the current casting process according to the set liquid level parameters corresponding to the current casting process and the fluctuation range of molten steel when the molten steel is contained in the crystallizer. Further, on the lower side of the reference area, determining a target liquid level parameter of the crystallizer after entering the ending stage in the current casting process, including: Determining the lowest liquid level parameter of molten steel when the molten steel is contained in the crystallizer according to the set liquid level parameter corresponding to the current casting process and the fluctuation range of the molten steel when the molten steel is contained in the crystallizer; And determining a target liquid level parameter of the crystallizer after entering a final stage in the current casting process according to the corresponding safe liquid level adjustment parameter during production and the lowest liquid level parameter of molten steel during molten steel content in the crystallizer at the lower side of