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CN-121988709-A - Continuous casting mixed steel section cutting control method, system, electronic equipment and storage medium

CN121988709ACN 121988709 ACN121988709 ACN 121988709ACN-121988709-A

Abstract

The invention relates to the technical field of mixed steel production, in particular to a continuous casting mixed steel section cutting control method, a continuous casting mixed steel section cutting control system, electronic equipment and a storage medium, which comprise the steps of collecting and integrating dynamic process parameter sets in real time; the method comprises the steps of constructing a transient multi-physical field coupling mathematical model based on a dynamic process parameter set, calculating unsteady flow field-temperature field-concentration field coupling numerical values by taking the dynamic process parameter set as a time-varying boundary condition and a source item of the transient multi-physical field coupling mathematical model, generating a casting blank length direction component distribution curve based on a calculation result, defining a mixed steel section starting point and a stopping point, executing an optimized cutting decision logic according to the defined mixed steel section starting point and stopping point information, and generating an instruction to drive cutting equipment. According to the method, the multi-physical field coupling calculation is performed based on the acquisition of the dynamic process parameters of continuous casting production, the length and the component gradient of the steel mixing area of the casting blank are accurately predicted on line in the steel mixing process under the actual continuous casting dynamic change process parameters, an optimized cutting instruction is generated according to the length and the component gradient, and the metal yield of the casting blank is improved.

Inventors

  • ZHANG HUANXIN

Assignees

  • 麦特勒智能科技(张家港)有限公司

Dates

Publication Date
20260508
Application Date
20260127

Claims (10)

  1. 1. The cutting control method for the continuous casting mixed steel section is characterized by comprising the following steps of: acquiring dynamic water distribution parameters including a blank pulling speed, a superheat degree and a secondary cooling area in real time, and constructing a dynamic process parameter set; Based on the dynamic process parameter set, constructing a transient multi-physical field coupling mathematical model describing the area from the tundish to the casting blank before cutting; Taking the dynamic process parameter set as a time-varying boundary condition and a source item of the transient multi-physical field coupling mathematical model, calculating and taking steel grade switching time as a starting point, and advancing synchronously with the actual production rhythm by adopting a time stepping method until a concentration field in a calculation domain reaches a new stable state, so as to realize the calculation of an unsteady flow field-temperature field-concentration field coupling numerical value; generating a component distribution curve in the length direction of the casting blank based on the calculation result, and defining a mixed steel section starting point; and executing optimized cutting decision logic according to the defined start and stop point information of the mixed steel section and generating an instruction to drive cutting equipment.
  2. 2. The method for controlling cutting of continuous casting and steel mixing sections according to claim 1, wherein the method is characterized in that target component concentration data of a designated space position point in the casting blank drawing direction obtained by calculating unsteady flow field-temperature field-concentration field coupling values are extracted; Generating a continuous concentration distribution curve of the target component in the length direction of the casting blank; Wherein the target component comprises carbon, manganese and silicon.
  3. 3. The method for controlling cutting of continuous casting steel mixed section according to claim 2, wherein the defining logic of the starting point of the steel mixed section is as follows: Setting the position of a casting blank, in which the concentration value of any preset target component in the casting blank continuously deviates from the standard range of the component of the previous steel grade for the first time, as the starting point of the mixed steel section from the casting moment of the new steel grade; setting the casting blank position of which the concentration values of all target components enter and are stably maintained in the internal control range of the component of the new steel grade as the end point of the mixed steel section; and the length of the casting blank between the starting point of the steel mixing section and the ending point of the steel mixing section is the length of the steel mixing section.
  4. 4. The method for controlling cutting of continuous casting steel hybrid segments according to claim 1, characterized in that said set of dynamic process parameters comprises at least: The method comprises the steps of connecting target steel grade components of two furnaces of molten steel in front and back, controlling the standard and internal control range of the target steel grade components, real-time withdrawal speed and time sequence data of change of the target steel grade, monitoring data of multipoint temperatures of the molten steel in a tundish, calculating real-time superheat degree, casting blank section size information, real-time heat flow density or equivalent heat exchange coefficient of cooling of a crystallizer, dynamic water distribution parameters of each cooling section of a secondary cooling zone, and temperature field model parameters or actual measurement data of the casting blank in an air cooling zone.
  5. 5. The continuous casting steel mixing section cutting control method according to claim 1, wherein the transient multi-physical field coupling mathematical model comprises: a flow field calculation model based on a transient Navier-Stokes equation; a temperature field calculation model for coupling the heat dissipation of the tundish, the heat transfer of the crystallizer and the secondary cooling area; and (5) describing a component concentration field calculation model of the transport behavior of the alloy elements in the front and rear steel types.
  6. 6. The continuous casting steel mixing section cutting control method according to claim 3, wherein an optimized cutting decision logic is executed according to the defined steel mixing section starting point, steel mixing section ending point, steel mixing section length and casting blank scaling length in a production plan, and a cutting instruction is generated, wherein the optimized cutting decision logic comprises: if the length of the mixed steel section is smaller than the length of a single fixed size, marking the complete casting blank as a transition blank; If the mixed steel section spans multiple fixed-length casting blanks, calculating the weighted average concentration of target components in each potential fixed-length casting blank, comparing the weighted average concentration with a new steel standard, judging the potential fixed-length casting blank with the average concentration being qualified as a qualified product, and if the fixed-length casting blank with the average concentration being unqualified, dynamically adjusting the cutting point, classifying the unqualified part into a short-length casting blank or a transitional casting blank, so that the total length of the qualified product casting blank is maximized.
  7. 7. The method for controlling cutting of a continuous casting and steel mixing section according to claim 6, wherein generating the cutting command based on the optimized cutting decision logic includes issuing the generated final cutting command table to the casting blank cutting equipment control system in real time through the production execution system interface.
  8. 8. A continuous casting steel-concrete section cutting control system for realizing the continuous casting steel-concrete section cutting control method as claimed in any one of claims 1 to 7, characterized by comprising: The data integration and communication interface module is communicated with a continuous casting secondary process control system, a tertiary production execution system and a site sensor network, and the dynamic process parameter set is obtained in real time and is integrated in a standardized way; The unsteady state multi-field coupling calculation engine module is internally provided with a transient state multi-physical field coupling mathematical model and a numerical solver, receives a data set acquired by the data integration and communication interface module, performs unsteady state flow field-temperature field-concentration field coupling numerical calculation, and outputs flow field, temperature field and multicomponent concentration field data evolving along with time; The intelligent judgment and visualization module of the steel mixing section is connected with the unsteady-state multi-field coupling calculation engine module, generates a component distribution curve and steel mixing section definition logic based on the output result of the unsteady-state multi-field coupling calculation engine module, provides a graphical interface to display a concentration distribution curve, the position and the length of the steel mixing section, and generates a structural judgment report; The optimized cutting decision and instruction generation module is used for receiving the output of the intelligent judgment and visualization module of the steel mixing section, and the optimized cutting decision logic is used for generating an executable cutting instruction sequence; And the control instruction execution and feedback module is used for sending the cutting instruction to the production execution system and the casting blank cutting equipment control system, receiving the execution state feedback and realizing closed-loop control.
  9. 9. An electronic device comprising a processor and a memory, wherein the memory stores at least one instruction or at least one program, and wherein the at least one instruction or at least one program is loaded and executed by the processor to implement the continuous casting hybrid steel section cutting control method according to any one of claims 1 to 8.
  10. 10. A computer-readable storage medium, characterized in that at least one instruction or at least one program is stored in the storage medium, the at least one instruction or the at least one program being loaded and executed by a processor to implement the continuous casting hybrid steel section cutting control method according to any one of claims 1 to 8.

Description

Continuous casting mixed steel section cutting control method, system, electronic equipment and storage medium Technical Field The invention relates to the technical field of mixed steel production, in particular to a continuous casting mixed steel section cutting control method, a continuous casting mixed steel section cutting control system, electronic equipment and a storage medium. Background In the continuous casting production of multi-furnace continuous casting, when the steel grade in the ladle is replaced, the front molten steel and the rear molten steel with different chemical compositions are mixed in the tundish to form a section of casting blank with a transition zone in which the chemical compositions are continuously changed, namely a 'steel mixing section'. The length of the mixed steel section and the distribution of the internal components of the mixed steel section are accurately predicted and controlled, and the method is important for optimizing casting blank cutting, improving metal yield and realizing fine quality control. In the prior art, chinese patent application publication No. CN111998892a discloses a mixed steel model system based on numerical simulation of flow field and concentration field, which simulates a mixed steel process through a data acquisition, calculation unit and judgment module. However, this system has significant limitations: On the one hand, the mixed steel mould system based on numerical simulation of the flow field and the concentration field is simulated based on the assumption of steady-state technological parameters, the real-time influence of dynamic changes of technological parameters such as pull speed, superheat degree, secondary cooling strength and the like on the mixed steel behavior is ignored, and the prediction precision of the mixed steel section in the actual dynamic production environment is low; on the other hand, the mixed steel mould type system based on flow field and concentration field numerical simulation focuses on simulation calculation of the internal state of the tundish, and output results comprise information such as flow field diagrams, concentration field diagrams, residence time distribution and the like, and as result display, manual analysis and result information processing are needed, and then front-end control is put into, so that automatic control is lacked. Based on the problems in the prior art, the invention provides a continuous casting mixed steel section cutting control method, a continuous casting mixed steel section cutting control system, electronic equipment and a storage medium. Disclosure of Invention The invention aims to provide a continuous casting mixed steel section cutting control method, a continuous casting mixed steel section cutting control system, electronic equipment and a storage medium, and aims to solve the technical problems that in the prior art, a simulated mixed steel model system constructed based on steady-state process parameters is low in component and length prediction precision of a continuous casting mixed steel casting blank and low in yield of steel billet metal obtained based on the prediction system. The technical scheme of the invention is that the continuous casting mixed steel section cutting control method comprises the following steps: acquiring dynamic water distribution parameters including a blank pulling speed, a superheat degree and a secondary cooling area in real time, and constructing a dynamic process parameter set; Based on the dynamic process parameter set, constructing a transient multi-physical field coupling mathematical model describing the area from the tundish to the casting blank before cutting; Taking the dynamic process parameter set as a time-varying boundary condition and a source item of the transient multi-physical field coupling mathematical model, calculating and taking steel grade switching time as a starting point, and advancing synchronously with the actual production rhythm by adopting a time stepping method until a concentration field in a calculation domain reaches a new stable state, so as to realize the calculation of an unsteady flow field-temperature field-concentration field coupling numerical value; generating a component distribution curve in the length direction of the casting blank based on the calculation result, and defining a mixed steel section starting point; and executing optimized cutting decision logic according to the defined start and stop point information of the mixed steel section and generating an instruction to drive cutting equipment. Preferably, extracting target component concentration data of a designated space position point along the casting blank drawing direction, which is obtained by calculating unsteady flow field-temperature field-concentration field coupling values; Generating a continuous concentration distribution curve of the target component in the length direction of the casting blank; Wherein the targ