CN-122018454-A - Digital modeling method for steel continuous casting production

CN122018454ACN 122018454 ACN122018454 ACN 122018454ACN-122018454-A

Abstract

The invention discloses a digital modeling method for continuous casting production of steel, which comprises the steps of constructing a continuous casting digital model and initializing, dividing molten steel and a casting blank into molten steel segments and casting blank segments respectively, converting a continuous casting process into a model segment queue moving process, converting the molten steel segments into the casting blank segments after moving to a crystallizer, judging equipment acting areas where the segments are located, recording equipment process parameters into corresponding segments, judging casting blank segments contained in the casting blank segments after flame cutting, integrating data of the casting blank segments into the corresponding casting blank, detecting quality of the casting blank, and matching quality assessment results with the corresponding casting blank segments. The invention realizes the full-element digital representation of the component-process-quality data, can effectively improve the integrity and usability of the production data, provides a complete process data chain for advanced digital and intelligent continuous casting production such as quality analysis and process optimization, and improves the utilization rate of data resources.

Inventors

NING XINYU
LI HAIJUN
ZHANG JIYANG
ZHANG YANFENG
WANG GUODONG

Assignees

东北大学

Dates

Publication Date: 20260512
Application Date: 20260106

Claims (10)

1. A digital modeling method for continuous casting production of steel, comprising the steps of: s1, constructing and initializing a continuous casting digital model comprising a tundish and a casting flow, and dividing molten steel and a casting blank into a molten steel section and a casting blank section respectively based on the weight of the molten steel and the length of the casting flow; s2, converting the continuous casting process into a model segment queue moving process, and converting the molten steel segment into a casting blank segment after moving to a crystallizer; s3, setting each equipment acting area of the continuous casting machine, judging the equipment acting area where each section is located, and recording the equipment technological parameters into the corresponding section; s4, judging casting blank segments contained in each slab after flame cutting, and integrating data of the casting blank segments into corresponding slabs to obtain comprehensive process history information of each slab; S5, quality detection is carried out on the slab, quality assessment results are matched with corresponding casting blank segments, and full-flow digital information collection of continuous casting production is formed.
2. The digital modeling method for continuous casting production of steel according to claim 1, wherein the step S1 is characterized in that for a continuous casting machine with the casting flow number of k, molten steel in a tundish is divided into a plurality of molten steel segments with the same weight from bottom to top, and the weight of a single molten steel segment is set to be m: (1) Wherein h i is the thickness of the casting blank of the ith casting flow, w i is the width of the casting blank of the ith casting flow, ρ is the density of the current casting steel, and the continuous casting digital model is initialized, wherein the number of casting blank segments is 0.
3. The method according to claim 1 or 2, wherein the product of the maximum value of the number of segments of molten steel and the weight m of the individual segments of molten steel is smaller than the maximum capacity of the ladle and the tundish, and the product of the number of segments of cast strand in each casting stream and the length of the individual segments of cast strand is smaller than the maximum length of the continuous casting machine.
4. The digital modeling method for continuous steel casting production according to claim 1, wherein the step S2 is characterized in that after the continuous casting process is started, a continuous casting digital model converts a continuous casting blank drawing process into a segmented queue for synchronous propulsion, a critical conversion relation between molten steel segments and casting blank segments is established, when a certain molten steel segment meets a critical conversion relation judging condition, the molten steel segment is converted into the casting blank segment, and a new molten steel segment is generated until a production end signal is received, wherein the critical conversion relation judging condition is as follows: (4) Wherein, the The current drawing length of the ith casting flow; The drawing length recorded when the molten steel segment before the ith casting flow is converted into the casting blank segment is used as the drawing length, S i is the cross sectional area of the ith casting flow casting blank, and ρ is the density of the current casting steel type.
5. The method for digitally modeling steel continuous casting according to claim 1, wherein S3 is specifically a starting point position of a continuous casting machine using equipment And end position Defining an equipment active area, then the length of the equipment active area The positions of the segments are obtained in real time, the equipment action areas of the segments are judged, and the process parameter values related to the corresponding equipment are recorded in the corresponding segments.
6. A digital modeling method for continuous steel casting production according to claim 1 or 5, characterized in that for a segment crossing the boundary of the equipment's active area, the weight or length proportion of the segment in the equipment's active area is calculated, and when the proportion exceeds a set proportion threshold, the segment is considered to be in the equipment's active area.
7. A digital modeling method for continuous steel casting production according to claim 1 or 5, wherein for a casting area apparatus, when the apparatus active area length AOI length is smaller than the set casting blank segment length n, the starting point of the apparatus active area is reset by the following formula And endpoint Expanding the device active area to be equal to the casting blank segment length n: (5) (6) (7) In the formula, And Respectively a starting point position and an ending point position of the equipment on the continuous casting machine; Extending the length of the active area for the device.
8. A digital modeling method for continuous steel casting production according to claim 1 or 5, wherein for each equipment technological parameter recorded in the segment, a data processing method is selected according to the equipment technological parameter characteristics based on the full period data of the segment in a certain equipment action area, wherein for non-threshold sensitive parameters, full period data average values are recorded, for threshold sensitive parameters, full period data extremum values are recorded, for difference sensitive parameters, difference maximum values of the full period data are recorded, and for start-stop parameters, the last updated data value is adopted.
9. The method of claim 1, wherein S4 is specifically that after the casting blank segment enters the flame cutting position, the digital model matches the cut slab with a plurality of corresponding casting blank segments according to the actual flame cutting position information, and the process data contained in the casting blank segments are subjected to induction processing to obtain the comprehensive process history information of the slab.
10. The method according to claim 1 or 9, characterized in that for the slab segments crossing the flame cutting position, i.e. the cross-zone segments, a slab before the flame cutting position is set as a first slab and a slab after the flame cutting position is set as a second slab in the direction of slab drawing, and it is determined whether the cross-zone segments are counted in the first slab according to the following formula: (9) Wherein X is the proportion of the cross-region segment j falling into the first slab, R j represents the initial position of the cross-region segment j, L j represents the final position of the cross-region segment j, B, E represents the initial and final positions of the first slab during flame cutting respectively, P represents the set effective duty ratio threshold, if Judging that the casting blank section falls into the first slab, otherwise judging that the casting blank section falls into the second slab.

Description

Digital modeling method for steel continuous casting production Technical Field The invention belongs to the field of steel continuous casting production, and particularly relates to a digital modeling method for steel continuous casting production. Background The continuous casting production links of advanced steel enterprises are mostly provided with complete data acquisition and storage systems as large and complex modern process industries, and large-scale industrial data in the production process are recorded. Patent document CN118122976a discloses a continuous casting method, device, storage medium and computer equipment based on digital twin, the method is based on actual continuous casting scene data corresponding to a target continuous casting device, including three-dimensional size data, position data, three-dimensional size data of a continuous casting model, process data of a continuous casting site, and the like of the target continuous casting device, and a preset continuous casting digital twin model is constructed. And analyzing the casting solidification process under the next continuous casting process by using a preset continuous casting digital twin model based on the real-time running state data and the technological parameters of the continuous casting machine to obtain the behavior rule of the casting solidification process under the next continuous casting process. However, the data resources of all links produced in the data acquisition and storage system are in a state of decentralized management, the data relevance of all links is poor, and the serious information island problem exists. Because of the lack of an effective digital modeling method, continuous casting data matching to the accuracy of meters cannot be realized, the collected data are difficult to reflect the production state of a continuous casting machine and the full life cycle process of billet production, and the effective utilization of data resources is seriously affected. Patent document CN117473770a discloses an intelligent management system for steel equipment based on digital twin information, which performs spatial and temporal synchronization on data generated by each production equipment to collect real-time data of the steel equipment and corresponding production processes. However, this patent application does not fully address the problem of tracking the casting blank process history in continuous casting production. The problem of low data resource utilization rate still seriously hinders the development of digital technology in the continuous casting process. Disclosure of Invention In order to solve the technical problems in the background technology, the invention provides a digital modeling method for steel continuous casting production, which aims at the problem of continuous casting process information island and the problem of billet process information matching tracking on the basis of the existing continuous casting production information system, digitally models the continuous casting production process by adopting a sectional tracking method according to the characteristic that a continuous casting blank is solidified while moving, and combines slab quality detection results to realize full-element digital representation of component-process-quality data. The digital model provided by the invention can effectively improve the integrity and usability of production data, provides a complete process data chain for advanced digital and intelligent continuous casting production such as quality analysis, process optimization and the like, and improves the utilization rate of data resources. In order to achieve the above object, the present application provides the following solutions: a digital modeling method for continuous casting production of steel, comprising the steps of: s1, constructing and initializing a continuous casting digital model comprising a tundish and a casting flow, and dividing molten steel and a casting blank into a molten steel section and a casting blank section respectively based on the weight of the molten steel and the length of the casting flow; s2, converting the continuous casting process into a model segment queue moving process, and converting the molten steel segment into a casting blank segment after moving to a crystallizer; s3, setting each equipment acting area of the continuous casting machine, judging the equipment acting area where each section is located, and recording the equipment technological parameters into the corresponding section; s4, judging casting blank segments contained in each slab after flame cutting, and integrating data of the casting blank segments into corresponding slabs to obtain comprehensive process history information of each slab; S5, quality detection is carried out on the slab, quality assessment results are matched with corresponding casting blank segments, and full-flow digital information collection of continuous casting pro