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Method and device for judging slag entrapment fault of crystallizer

A fault judgment and crystallizer technology, applied in instruments, special data processing applications, electrical digital data processing, etc., can solve mold slag volume faults, unsteady flow of strands in the crystallizer, slag-steel interface protection slag volume Input and other problems, to achieve accurate judgment, to achieve the effect of slag volume failure

Pending Publication Date: 2021-07-16
BEIJING SHOUGANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the process of continuous casting of ultra-low carbon steel, due to factors such as nozzle blockage and argon blowing, the liquid level of the crystallizer fluctuates, resulting in the unsteady flow of the stream in the crystallizer, and the entanglement of mold slag at the slag-steel interface is prone to occur, forming Mold slag volume failure
The forms of slag entanglement in the crystallizer include shear force slag entanglement, slag drop emulsification slag entanglement, over-current slag entrapment, eddy current slag entrapment, negative pressure slag entanglement on the nozzle wall, etc. However, no matter what slag entanglement form is determined The catch and probability of the primary solidification hook on the meniscus in the crystallizer will eventually be inherited to the subsequent process, causing surface defects on the steel plate

Method used

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  • Method and device for judging slag entrapment fault of crystallizer
  • Method and device for judging slag entrapment fault of crystallizer
  • Method and device for judging slag entrapment fault of crystallizer

Examples

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application example 1

[0087] During the process of casting M3A33 (C: 0.0014%) with a continuous casting mold with a section of 230×1100mm in a steel plant, the casting speed is 1.7m / min, and the degree of superheat is 20-35°C; Control method, satisfying 1.0MW / (m 3 *min)≤Q v ≤1.25MW / (m 3 *min), the corresponding mold slag inclusion index J is 0.45 pieces / km, which is 0.30 pieces / km lower than the original process.

application example 2

[0089] During the process of casting M3A33 (C: 0.0014%) with a continuous casting mold with a section of 230×1600mm in a steel plant, the casting speed is 1.2m / min, and the degree of superheat is 20-35°C; Control method, meet 1.0MW / (m 3 *min)≤Q v ≤1.25MW / (m 3 *min), the corresponding mold slag inclusion index J is 0.35 pieces / km, which is 0.20 pieces / km lower than the original process.

application example 3

[0091] During the process of casting M3A30 (C: 0.0016%) with a continuous casting mold with a section of 230×1800mm in a steel plant, the casting speed is 1.0m / min, and the degree of superheat is 20-35°C; Control method, satisfying 1.0MW / (m 3 *min)≤Q v ≤1.25MW / (m 3 *min), the corresponding mold slag inclusion index J is 0.28 pieces / km, which is 0.15 pieces / km lower than the original process.

[0092] Based on the same inventive concept as the method, the embodiment of the present invention also provides a crystallizer slag entrainment fault judging device, such as image 3 Shown is the structural representation of this device embodiment, comprises:

[0093] The first acquisition module 51 is used to acquire the heat flux of the side plate radiator of the crystallizer;

[0094] The first calculation module 52 is used to calculate the ratio of the heat flux to the casting speed of the continuous casting machine, and obtain the heat rate ratio of the side plate radiator;

[...

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Abstract

The invention relates to the technical field of crystallizer fault detection, in particular to a method and device for judging a slag entrapment fault of a crystallizer. The method comprises the steps that the heat flux of a side plate radiator of the crystallizer is obtained; the ratio of the heat flux to the pouring pulling speed of the continuous casting machine is calculated, and the heat speed ratio of the side plate radiator is obtained; and if the heat rate ratio is greater than a set threshold value, it is determined that the crystallizer has a slag entrapment fault. According to the method and device, based on the growth principle of the meniscus primary solidification hook in the crystallizer, the growth environment of the current meniscus primary solidification hook in the crystallizer is represented by ingeniously utilizing the ratio of the heat flux to the casting pulling speed of a continuous casting machine, if the heat speed ratio of a side plate radiator is larger than a set threshold value, it is determined that the crystallizer has a slag entrapment fault, therefore, accurate judgment on the slag entrapment fault of the crystallizer is realized.

Description

technical field [0001] The invention relates to the technical field of crystallizer fault detection, in particular to a crystallizer slag entrainment fault judgment method and device. Background technique [0002] In the process of continuous casting of ultra-low carbon steel, due to factors such as nozzle blockage and argon blowing, the liquid level of the crystallizer fluctuates, resulting in the unsteady flow of the stream in the crystallizer, and the entanglement of mold slag at the slag-steel interface is prone to occur, forming Crystallizer slag volume failure. The forms of slag entanglement in the crystallizer include shear force slag entanglement, slag drop emulsification slag entanglement, over-current slag entrapment, eddy current slag entrapment, negative pressure slag entanglement on the nozzle wall, etc. However, no matter what slag entanglement form is determined The capture and probability of the meniscus in the crystallizer for the initial solidification hoo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F113/08G06F119/08
CPCG06F30/20G06F2119/08G06F2113/08
Inventor 朱克然黄福祥龚坚刘道正裴兴伟郝丽霞李志军俞学成
Owner BEIJING SHOUGANG CO LTD