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CN-121998182-A - Method, apparatus, device, storage medium and program product for predicting length of internal defect of continuous casting slab

CN121998182ACN 121998182 ACN121998182 ACN 121998182ACN-121998182-A

Abstract

The application discloses a prediction method, a prediction device, equipment, a storage medium and a program product for the internal defect length of a continuous casting billet. The prediction method comprises the steps of obtaining production data of a target casting blank, wherein the production data comprise the type of the target casting blank, the continuous casting speed V 0 and the thickness d of the target casting blank, obtaining predicted processing time T under abnormal conditions, obtaining first continuous casting speed V 1 under abnormal conditions and running time T 2 under the first continuous casting speed V 1 according to the predicted processing time T, obtaining the length of an internal quality defect of the target casting blank according to the production data, the first continuous casting speed V 1 and a defect length prediction model, and constructing the defect length prediction model based on a solidification calculation formula. The prediction method of the embodiment accurately predicts the length of the internal quality defect under the abnormal deceleration condition of continuous casting under the condition of continuous production, thereby effectively guiding the internal quality control of the continuous casting blank and realizing stable production.

Inventors

  • CHEN ZHENWEN
  • SONG GANG
  • LIU PENG
  • LIANG LIANG
  • LIU XUHUI
  • ZHENG QING
  • QI JIANGHUA
  • WANG HONGFENG
  • DENG ZHIXUN
  • XIAO LEI
  • Rong Jiannan

Assignees

  • 湖南华菱涟源钢铁有限公司

Dates

Publication Date
20260508
Application Date
20260119

Claims (12)

  1. 1. The method for predicting the length of the internal defect of the continuous casting billet is characterized by comprising the following steps: Obtaining production data of a target casting blank, wherein the production data comprise the type of the target casting blank, the continuous casting speed V 0 and the thickness d of the target casting blank; Obtaining the expected processing time T under the abnormal condition, and obtaining a first continuous casting speed V 1 under the abnormal condition and the running time T 2 at the first continuous casting speed V 1 according to the expected processing time T; And obtaining the length of the internal quality defect of the target casting blank according to the production data, the first continuous casting speed V 1 and a defect length prediction model, wherein the defect length prediction model is constructed based on a solidification calculation formula.
  2. 2. The prediction method according to claim 1, wherein the method for constructing the defect length prediction model includes: Obtaining the solidification shell thickness e 0 of the target casting blank and the liquid core length L 0 under the condition of the continuous casting speed V 0 according to the continuous casting speed V 0 and the thickness d; According to the thickness e 0 of the solidified shell, the length L 0 of the liquid core and the formula E 0 /L 0 , obtaining an angle alpha; according to the solidification calculation formula e=k Obtaining the thickness e 2 of a solidified shell in the time t 0 -t 2 , wherein K is determined according to the type of the target casting blank; Using the formula E 0 /L 0 =(e 0 -e 2 )/(L 0 -L 2 ) to obtain the liquid core length L 2 under the condition of the first continuous casting speed V1; And obtaining the length of the internal quality defect of the target casting blank under the abnormal condition as L 0 -L 2 according to the liquid core length L 0 and the liquid core length L 2 .
  3. 3. The prediction method according to claim 1, wherein the obtaining the first casting speed V 1 in the abnormal situation and the running time T 2 at the first casting speed V 1 according to the predicted processing time T includes: Under the abnormal condition of continuous production of the casting blank, the production running speed of the casting blank is adjusted, and the casting blank sequentially goes through a deceleration stage, a constant speed stage and a speed increasing stage, wherein: In a deceleration phase, the steel strip is decelerated from the continuous casting speed V 0 to the first continuous casting speed V 1 at an acceleration a 1 , the duration t 1 of the deceleration phase; In the constant speed stage, the steel strip is run at a first casting speed V 1 for a time t 2 ; in the speed increasing stage, the steel belt is increased from the first continuous casting speed V 1 to the continuous casting speed V 0 or the second continuous casting speed V 2 at the acceleration a 2 , and the duration t 3 of the speed increasing stage; from the casting speed V 0 , the predicted treatment time T and the duration time T 1 and the duration time T 3 , a run time T 2 at the first casting speed V 1 is determined.
  4. 4. A prediction method according to claim 3, wherein the run time t 2 of the constant speed phase is determined according to the following relationship: 。
  5. 5. The prediction method according to claim 3 or 4, wherein V 2 is equal to V 0 , and/or a 1 is 0.15-0.25 m/min 2 , and/or a 2 is 0.15-0.25 m/min 2 .
  6. 6. The method according to claim 3 or 4, wherein before obtaining the length of the internal quality defect of the target cast slab based on the production data, the first continuous casting speed V 1 and the defect length prediction model, the method further comprises controlling L 2 ＜L 1 ＜L 0, L 2 ＜L 3 ＜L 0, to control the length of the liquid core during continuous casting L 1 at the time of duration t 1 and the length of the liquid core during continuous casting L 3 at the time of duration t 3 .
  7. 7. The method of claim 6, wherein the method of determining the wick length L 1 comprises: according to the solidification calculation formula e=k Obtaining the thickness e 1 of the solidified shell in the time t 0 -t 1 , Using the formula E 0 /L 0 =(e 0 -e 1 )/(L 0 -L 1 ) to obtain the liquid core length L 1 of the deceleration stage.
  8. 8. The method of predicting a liquid core length L 3 of a cast slab according to claim 6, comprising: according to the solidification calculation formula e=k Obtaining the thickness e 3 of the solidified shell in the time t 0 -t 3 , Using the formula E 0 /L 0 =(e 0 -e 3 )/(L 0 -L 3 ) to obtain the liquid core length L 3 in the ramp-up phase.
  9. 9. A device for predicting the length of an internal defect of a continuous casting billet, said device comprising: The device comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring production data of a target casting blank, and the production data comprise the type of the target casting blank, the continuous casting speed V 0 and the thickness d of the target casting blank; The determining module is used for obtaining the expected processing time T under the abnormal condition and obtaining a first continuous casting speed V 1 under the abnormal condition and the running time T 2 under the first continuous casting speed V 1 according to the expected processing time T; And the prediction module is used for obtaining the length of the internal quality defect of the target casting blank according to the production data, the first casting speed V1 and the defect length prediction model, wherein the defect length prediction model is constructed based on a solidification calculation formula.
  10. 10. An electronic device comprising a processor and a memory storing computer program instructions, the processor implementing a method for predicting the length of a defect inside a strand according to any one of claims 1 to 8 when executing the computer program instructions.
  11. 11. A computer-readable storage medium, wherein computer program instructions are stored on the computer-readable storage medium, which when executed by a processor, implement the method for predicting the length of a defect inside a continuous casting billet according to any one of claims 1 to 8.
  12. 12. A computer program product, characterized in that instructions in the computer program product, when executed by a processor of an electronic device, cause the electronic device to perform the method of predicting the length of an internal defect of a continuous casting billet according to any one of claims 1-8.

Description

Method, apparatus, device, storage medium and program product for predicting length of internal defect of continuous casting slab Technical Field The application belongs to the technical field of continuous casting production of steel, and particularly relates to a method, a device, equipment, a storage medium and a program product for predicting the internal defect length of a continuous casting billet. Background Continuous casting is a key link in steel production. In the continuous casting process, the continuous casting speed may need to be adjusted, particularly, the speed-down operation may be performed due to abnormal conditions such as equipment failure, fluctuation of the molten steel temperature, or misoperation. The fluctuation of the continuous casting speed directly affects the solidification process of the cast slab, resulting in a change in solidification end (liquid core length). The continuity of the continuous casting production process has a great influence on the utilization rate and energy consumption of the whole equipment, and generally, even if an accident abnormality occurs, other processes are adjusted as much as possible to solve the abnormality, and a production interruption means is not generally adopted. Therefore, how to realize continuous production of continuous casting and to realize stable quality of continuous casting blanks under abnormal conditions is an important direction of research. Disclosure of Invention The embodiment of the application provides a prediction method, a prediction device, equipment, a storage medium and a program product for the internal defect length of a continuous casting billet, which can accurately predict the problem of the internal quality defect length range under the abnormal deceleration condition of continuous casting under the condition of continuous production, thereby effectively guiding the internal quality control of the continuous casting billet, reducing the quality risk and realizing the production stability and the quality stability of the continuous casting billet. In a first aspect, an embodiment of the present application provides a method for predicting an internal defect length of a continuous casting billet, where the method includes: Obtaining production data of a target casting blank, wherein the production data comprise the type of the target casting blank, the continuous casting speed V 0 and the thickness d of the target casting blank; Obtaining the expected processing time T under the abnormal condition, and obtaining a first continuous casting speed V 1 under the abnormal condition and a running time T 2 under the first continuous casting speed V 1 according to the expected processing time T; And obtaining the length of the internal quality defect of the target casting blank according to the production data, the first continuous casting speed V 1 and the defect length prediction model, wherein the defect length prediction model is constructed based on a solidification calculation formula. In some embodiments, the method for constructing the defect length prediction model includes: Obtaining the solidified shell thickness e 0 of the target casting blank and the liquid core length L 0 under the condition of the continuous casting speed V 0 according to the continuous casting speed V 0 and the thickness d; According to the thickness e 0 of the solidified shell, the length L 0 of the liquid core and the formula E 0/L0, obtaining an angle alpha; according to the solidification calculation formula e=k Obtaining the thickness e 2 of a solidified shell in the time t 0-t2, wherein K is determined according to the type of a target casting blank; Using the formula E 0/L0=(e0-e2)/(L0-L2) to obtain the liquid core length L 2 under the condition of the first continuous casting speed V1; And obtaining the length of the internal quality defect of the target casting blank under the abnormal condition as L 0-L2 according to the liquid core length L 0 and the liquid core length L 2. In some embodiments, deriving the first casting speed V 1 in the event of an anomaly and the run time T 2 at the first casting speed V 1 from the predicted process time T comprises: Under the abnormal condition of continuous production of the casting blank, the production running speed of the casting blank is adjusted, and the casting blank sequentially goes through a deceleration stage, a constant speed stage and a speed increasing stage, wherein: In the deceleration phase, the steel strip is decelerated from the continuous casting speed V 0 to a first continuous casting speed V 1 at an acceleration a 1, and the duration t 1 of the deceleration phase is prolonged; In the constant speed stage, the steel strip is run at a first casting speed V 1 for a time t 2; In the speed increasing stage, the steel belt is increased from the speed V 1 to the continuous casting speed V 0 or the second continuous casting speed V 2 at the acceleration a 2, and the duration