Dynamic control method and system for electromagnetic stirring of crystallizer

Abstract

The invention discloses a dynamic control method and system for electromagnetic stirring of a crystallizer, and belongs to the technical field of metallurgical automation. The method aims at solving the problems that in the prior art, electromagnetic stirring parameters are fixed and cannot adapt to dynamically-changing continuous casting working conditions, so that low-speed stirring is insufficient, high-speed stirring is too strong, energy consumption is high, and casting blank quality is not stable. The method comprises the steps that actual process parameters such as the slab width, the casting speed and the water gap immersion depth in the continuous casting process are obtained in real time; on the basis of the parameters, addressing is carried out in a preset database in which the mapping relation between the process parameter combination and the current value is stored; according to the addressing result, a target electromagnetic stirring current value accurately matched with the current working condition is determined; and finally, controlling the current output of the electromagnetic stirring device based on the target value. By dynamically adjusting the stirring strength, intelligent adaptation to different working conditions is achieved, the casting blank quality and the production stability are remarkably improved, and energy consumption is effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of metallurgical automation, and particularly relates to electromagnetic stirring control in the continuous steel casting process, and especially relates to a crystallizer electromagnetic stirring control method and system capable of dynamically adjusting the magnetic field strength according to the continuous casting process parameters. BACKGROUND

[0002] In the continuous steel casting production process of the steel industry, crystallizer electromagnetic stirring (M-EMS) is a key technology, which generates a moving magnetic field in the crystallizer to drive the molten steel to flow, so as to achieve the purpose of improving the quality of the casting blank, such as promoting the floating of inclusions, eliminating bubbles, and improving the solidification structure, etc.

[0003] However, the existing crystallizer electromagnetic stirring technology generally uses fixed magnetic field parameters (i.e. fixed stirrer output current) for operation. This "one-size-fits-all" control method exposes many problems when facing complex and variable continuous casting conditions. The process parameters such as the casting speed and the slab width in the continuous casting production need to be dynamically adjusted frequently according to factors such as steel grade and production plan. For example, the casting speed of conventional slabs usually fluctuates between 1.2-1.8 m / min.

[0004] The main defects of the fixed magnetic field parameter design are:

[0005] 1. Insufficient stirring at low casting speed: When the continuous casting machine operates at a lower casting speed, the fixed magnetic field parameters produce relatively weak electromagnetic force, which cannot achieve sufficient and effective stirring of the molten steel. This will cause non-metallic inclusions and bubbles in the molten steel to be difficult to float and remove, eventually remaining inside the casting blank, forming defects, and seriously affecting the internal purity of the casting blank and the mechanical properties of the final product.

[0006] 2. Over-stirring at high casting speed: When the continuous casting machine switches to high casting speed conditions, the electromagnetic force produced by the same magnetic field parameters will become too strong. Over-stirring will vigorously agitate the molten steel surface in the crystallizer, increasing the risk of liquid surface protection slag being entrained into the molten steel to form a slag entrapment defect. Liquid surface slag entrapment is one of the important reasons for the deterioration of the surface quality of the casting blank and the instability of the production process.

[0007] 3. Low energy efficiency: In traditional electromagnetic stirring technology, a considerable part (about 35%) of the magnetic field energy acts on the already solidified casting blank shell, and this part of energy does not participate in effective molten steel stirring, constituting a direct waste of energy. Especially under high-speed casting conditions, in order to ensure a certain stirring effect, the current often needs to be increased, resulting in a significant increase in the power consumption cost of electromagnetic stirring, with an increase of more than 20%.

[0008] To solve the above problems, some explorations have been made in the industry. For example, a slab continuous casting mold electromagnetic stirring and argon blowing compatible operation method is disclosed in Chinese Patent Application No. CN118143214A, published on June 7, 2024. It calculates the flow field and temperature field by establishing a mathematical model, and adjusts the combination of current and argon blowing amount according to the calculation results. Although this method considers multiple process parameters, it relies on complex online mathematical model calculations, which requires high computing resources and may be limited in real-time responsiveness. Another Chinese Patent Application No. CN104107891A, published on October 22, 2014, "Slab Continuous Casting Mold Electromagnetic Stirring Device Electromagnetic Inductor" mainly solves the problem of magnetic leakage of the electromagnetic inductor.

[0009] In summary, the design of fixed magnetic field parameters in the prior art cannot adapt to the dynamic changes of key parameters such as casting speed in the continuous casting process, resulting in poor stirring effect, unstable casting quality, and high energy consumption under different working conditions. Therefore, there is an urgent need for a technical solution that can dynamically and accurately adjust the magnetic field parameters according to the real-time changes of continuous casting process parameters to solve the above challenges. SUMMARY

[0010] The main purpose of the present application is to overcome the above-mentioned defects of the prior art, and to provide a dynamic control method and system for crystallizer electromagnetic stirring, aiming to realize the dynamic matching of electromagnetic stirring parameters and continuous casting conditions, thereby improving the quality of the casting blank, reducing the production energy consumption and enhancing the process stability.

[0011] To achieve the above-mentioned purpose, the first aspect of the present application provides a dynamic control method for crystallizer electromagnetic stirring, comprising the following steps:

[0012] Real-time acquisition of at least actual process parameters including slab width, casting speed and nozzle immersion depth in the continuous casting production process;

[0013] Based on the actual process parameters, address in the pre-set database, the database stores the mapping relationship between different process parameter combinations and electromagnetic stirring current values;

[0014] According to the addressing result, determine the target electromagnetic stirring current value matched with the actual process parameters;

[0015] Based on the target electromagnetic stirring current value, control the current output of the crystallizer electromagnetic stirring device.

[0016] Through the technical scheme, the most suitable electromagnetic stirring current value under the current working condition can be quickly retrieved from the preset and optimized database according to the real-time change of the core process parameters (slab width, casting speed and nozzle depth) in the continuous casting process, and closed-loop control is performed. This dynamic adjustment mode replaces the traditional fixed parameter control, so that the electromagnetic stirring force can accurately adapt to the needs of different working conditions, solving the problems of insufficient stirring at low casting speed and excessive stirring at high casting speed, thereby ensuring the quality of the cast slab while avoiding unnecessary energy consumption.

[0017] As a preferred technical scheme, before the step of addressing in the preset database based on the actual process parameters, the raw value of the casting speed is subjected to precision adjustment processing to obtain a processed casting speed value. The addressing process is based on the processed casting speed value. By preprocessing the casting speed data, high-frequency noise and slight fluctuations caused by the sensor can be filtered out, so that the control system does not have to respond to every slight speed change, enhancing the stability of the control output.

[0018] Further, as a preferred technical scheme, the precision adjustment processing includes multiplying the raw value of the casting speed by a preset multiple (for example, 10) and then taking an integer, and then dividing the result by the multiple. This method can effectively adjust the precision of the casting speed to one decimal place, simplifying the complexity of subsequent addressing and meeting the actual needs of the production process for step control of the casting speed.

[0019] Further, as a preferred technical scheme, the precision adjustment processing further includes setting a dead zone range. When the difference between the raw value of the casting speed and the processed casting speed value falls within the dead zone range (for example, -0.06 to -0.04 or 0.04 to 0.06), the system maintains the current processed casting speed value unchanged. This control logic similar to "hysteresis" or "lag" can effectively avoid frequent jumps in the output current caused by slight fluctuations of the casting speed near the two integer critical points, greatly improving the stability and reliability of the entire control system.

[0020] As a preferred technical scheme, the mapping relationship stored in the database includes a plurality of preset slab width ranges, and a two-dimensional data matrix corresponding to each slab width range, which is composed of a plurality of casting speed levels and a plurality of nozzle immersion depth levels. This structured data storage method has clear logic and is easy to manage and address. It decomposes the complex, multi-dimensional process parameter space into a hierarchical and zoned lookup table, making the addressing process efficient and accurate.

[0021] Correspondingly, as a preferred technical solution, the addressing step specifically comprises: firstly, determining the target slab width range to which the real-time slab width belongs, to complete first-level addressing; and then, in the two-dimensional data matrix corresponding to the target width range, performing second-level addressing according to the processed casting speed value and the nozzle immersion depth, so as to accurately locate the unique target current value. The three-level addressing structure can comprehensively respond to the dynamic changes of the three factors, i.e., the casting speed, the slab width and the nozzle depth, which have the most significant influence on the molten steel flow, and realizes accurate and multi-dimensional dynamic response of the stirring intensity.

[0022] As a preferred technical solution, the method further provides a human-computer interaction interface, which allows process engineers or operators to conveniently manually view, modify and save the mapping relationship in the database according to production experience, steel grade changes or quality feedback. This provides a convenient way for continuous optimization and flexible adjustment of the control strategy, and makes the method have better on-site adaptability and maintainability.

[0023] The second aspect of the present application provides a dynamic control system for electromagnetic stirring of a mold, which is designed to execute the aforementioned method. The system comprises a data acquisition module, a data storage module, a processing module and a control module. The data acquisition module is used to acquire actual process parameters in real time. The data storage module is used to store a database containing mapping relationships. The processing module is responsible for executing addressing logic to determine a target current value. The control module sends a control instruction to the power supply of the electromagnetic stirring device according to the target value. The system realizes the technical concept of the method and has all the beneficial effects brought by the method.

[0024] Compared with the prior art, the present application has the following beneficial effects:

[0025] The present application has the following beneficial effects:

[0026] 1. Dynamic adaptability and quality improvement: By acquiring process parameters such as casting speed in real time and dynamically adjusting the stirring current, the present application can provide sufficient stirring force at low casting speed to improve internal quality, and avoid excessive stirring at high casting speed to ensure surface quality and liquid level stability, thereby achieving optimal metallurgical effect in a wide range of working conditions and improving the quality of the cast slab.

[0027] 2. Significant energy saving effect: The present application accurately matches the required magnetic field strength according to the working condition, avoiding the invalid energy output to the solidified area in the traditional fixed parameter control, especially in high-speed casting conditions, which can significantly reduce the power consumption cost of the electromagnetic stirring system.

[0028] 3. Improved production stability and automation level: Dynamic adaptive control reduces the frequency and error of manual intervention, making the continuous casting process more stable and reliable, and improving the automation level and overall production efficiency of the production line.

[0029] 4. Flexible operation: an intuitive user interface is provided, which facilitates process personnel to flexibly adjust control parameters according to actual requirements, so that the system is more practical and maintainable. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the disclosed embodiments, the drawings of the embodiments will be briefly introduced below, which are merely used for illustrative purposes, and are not intended to limit the protection scope of the present application.

[0031] Figure 1 is a man-machine interactive interface schematic diagram provided by the embodiment of the present application for parameter input and database management.

[0032] Figure 2 is a database management flowchart provided by the embodiment of the present application.

[0033] Figure 3 is a work flowchart of the dynamic control method in the commissioning state provided by the embodiment of the present application.

[0034] Figure 4 is a structure block diagram of a dynamic control system for electromagnetic stirring of a crystallizer provided by the embodiment of the present application.

[0035] In the figure: 1, interface button area; 2, state display area; 3, slab width selection area; 4, data editing button; 5, casting speed area; 6, nozzle depth area; 7, current area;

[0036] 101, data acquisition module; 102, data storage module; 103, processing module; 104, control module. DETAILED DESCRIPTION

[0037] The technical solutions of the present application (including the preferred technical solutions) will be further described in detail below by means of the drawings and by enumerating some optional embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0038] Embodiment 1

[0039] Please refer to Figure 4 , the embodiment provides a dynamic control system for electromagnetic stirring of a crystallizer. The system can be integrated in a secondary automation control system (Level 2) of a continuous casting production line, or exist as an independent control unit. The system includes a data acquisition module 101, a data storage module 102, a processing module 103 and a control module 104.

[0040] Data acquisition module 101: This module is responsible for communicating with the base automation system (Level 1) or process control computer of the continuous caster to acquire key process parameters in real time during the continuous casting process. The communication method can be a standard industrial Ethernet protocol such as OPC (OLE for Process Control), Modbus TCP / IP, or Profinet. The acquired parameters at least include:

[0041] Slab width: usually provided by the sensor of the caster width adjustment device, unit: millimeter (mm).

[0042] Pulling speed: also known as casting speed or caster pulling speed, provided by the speed sensor of the pulling-straightening machine, unit: meter / minute (m / min). This value is the original value for subsequent calculation.

[0043] SEN immersion depth: indirectly calculated by the position sensor or liquid level gauge of the SEN stopper system, unit: millimeter (mm).

[0044] The acquisition period of these parameters can be set between 100 milliseconds and 1 second to ensure real-time data.

[0045] Data storage module 102: This module is used to solidify a core database. The function of this database is to store the mapping relationship between the electromagnetic stirring current value and different combinations of process parameters. In physical implementation, the data storage module 102 can be a non-volatile memory such as a solid state disk (SSD), a flash chip, or a program storage area of a PLC. The logical structure of the database is carefully designed in this invention, which takes the slab width as the first index. For example, the system presets 8 slab width ranges, covering all specifications that the caster can produce. For each width range, there is a two-dimensional data matrix (or called lookup table). The row index of the matrix represents different pulling speed levels (for example, from 0.8 m / min to 2.5 m / min, with a step of 0.1 m / min), and the column index represents different SEN immersion depth levels (for example, from 80 mm to 150 mm, with a step of 10 mm). In each cell of the matrix, there is a specific electromagnetic stirring current value (unit: ampere A) determined after process optimization. These preset values can be based on a large amount of production experimental data, numerical simulation results, and the experience of experienced process engineers.

[0046] Processing module 103: This module is the "brain" of the whole system, usually implemented by a high-performance processor, such as the CPU of an industrial PC (IPC) or the central processing unit of a programmable logic controller (PLC). Its core function is to execute the dynamic control algorithm of the present application. The processing module 103 obtains real-time raw process parameters from the data acquisition module 101 and performs a series of calculations and judgments as follows:

[0047] 1. Data preprocessing of the pulling speed: In order to prevent frequent fluctuations in the control output, the processing module 103 first filters and adjusts the precision of the raw value of the pulling speed.

[0048] 2. Multi-level addressing: The processing module 103 executes an efficient three-level addressing logic.

[0049] 3. Output decision: After determining the unique target current value, it is passed to the control module 104.

[0050] Control module 104: This module is the execution unit. It receives the target current value instruction from the processing module 103. This module is usually a digital-to-analog (D / A) conversion card or a communication interface that directly sends a digital set value to the electromagnetic stirrer power supply. It converts the received digitized target current value (e.g. 350A) into a physical signal (e.g. 4-20mA analog signal or a Profibus-DP message) that the electromagnetic stirrer power supply can recognize and execute, thereby accurately controlling the actual current flowing through the electromagnetic stirrer coil and generating a rotating magnetic field of corresponding strength.

[0051] In addition, the present system also includes a human-machine interaction module (HMI, not shown separately in Figure 4 , but its interface is shown in Figure 1 ). This module is usually implemented by a touch screen or upper computer monitoring software, and it interacts with the processing module 103 and the data storage module 102, providing a visual operation and management platform for users.

[0052] Example 2

[0053] This embodiment will detail the implementation process of the dynamic control method of the present application, which mainly consists of two stages: parameter configuration stage of the database and real-time commissioning stage of the system.

[0054] Stage One: Database parameter configuration and management

[0055] This stage is usually performed before the system is put into operation or when the process is optimized. The operator (such as a process engineer) completes it through the human-machine interaction interface (HMI). Please understand in conjunction with Figure 1 and Figure 2 .

[0056] Figure 1 A sample HMI interface is shown. It primarily includes the interface button area 1 (containing function keys such as "Save," "Edit," and "Commission"), the status display area 2 (displaying real-time information such as the current target current, slab width, casting speed, and sprue depth), the slab width selection area 3 (with eight buttons representing eight different slab width ranges, such as 1400mm-1500mm, 1501mm-1600mm, and so on), the casting speed area 5, the sprue depth area 6, and the current area 7.

[0057] Configuration process is as follows Figure 2 As shown:

[0058] Entering the editing state: The operator first clicks the "Edit" button in the interface button area 1. The system then enters the editable state, and the data editing button 4 (such as Figure 1 shown) becomes available.

[0059] Select the slab width range: The operator clicks a button in the slab width selection area 3, such as the button, which represents selecting the width range of "1501mm-1600mm" as the target to be edited.

[0060] Data loading and display: The system responds to the click operation, retrieves the entire two-dimensional data matrix corresponding to the width range from the database of the data storage module 102, and displays its content in the data presentation module of the interface, that is, in a table consisting of the casting speed area 5, the nozzle depth area 6 and the current area 7.

[0061] Manual parameter modification: The operator can freely modify the current value of any cell in this table. For example, he can find the cell corresponding to the casting speed of 1.6m / min and the nozzle depth of 110mm and change its current value from 380A to 390A.

[0062] Save data: After completing all modifications, the operator clicks the "Save" button in the interface button area 1. The system will write all the data in the current interface table to the corresponding database area in the data storage module 102, completing the update of the original data.

[0063] Through this process, the core database of control strategies can be managed and optimized very flexibly and intuitively.

[0064] Phase 2: System real-time commissioning

[0065] When the database configuration is completed, the operator clicks the "Start" button, and the system enters the real-time dynamic control working state. Figure 3 understand the workflow diagram.

[0066] External data collection: After the system is started, the data collection module 101 begins to continuously collect real-time slab width, casting speed and nozzle immersion depth from the external continuous casting control system. Suppose at a certain time t1, the collected original values are: slab width = 1550 mm, casting speed = 1.45 m / min, and nozzle depth = 120 mm.

[0067] Data processing and precision adjustment: After the processing module 103 receives these original data, it immediately pre-processes the casting speed.

[0068] Precision adjustment: The casting speed 1.45 m / min is processed.

[0069] Multiply by 10: 1.45 * 10 = 14.5

[0070] Downward rounding: floor(14.5) = 14

[0071] Divide by 10: 14 / 10 = 1.4

[0072] The processed casting speed value is 1.4 m / min.

[0073] Dead zone judgment: Next, the dead zone judgment is performed to determine whether to update this value.

[0074] Difference calculation: original value - processed value = 1.45 - 1.4 = 0.05.

[0075] Judge whether the difference is within the dead zone range (-0.06 ~ -0.04) or (0.04 ~ 0.06).

[0076] The current difference 0.05 falls exactly within the range (0.04 ~ 0.06). According to the control logic, the system will not update the data at this time, i.e. the casting speed value used for addressing will remain at the last stable value. Suppose the last stable value is 1.4 m / min, then it will remain unchanged.

[0077] Suppose at the next time t2, the casting speed becomes 1.48 m / min.

[0078] Difference calculation: 1.48 - 1.4 = 0.08.

[0079] The difference 0.08 is not within the dead zone range. At this time, the system determines that it is a valid speed change, and the casting speed value used for addressing is updated to 1.4 m / min. Suppose at the next time t3, the casting speed becomes 1.52 m / min.

[0080] Precision adjustment: 1.52 * 10 = 15.2 -> floor(15.2) = 15 -> 15 / 10 = 1.5. The processed speed is 1.5 m / min.

[0081] Difference calculation: 1.52 - 1.5 = 0.02.

[0082] The difference 0.02 is not within the dead zone range. The system determines that this is a valid speed change and updates the value of the strip speed used for addressing to 1.5 m / min.

[0083] This dead zone logic effectively filters out the tiny fluctuations of speed between x.x4 and x.x6, ensuring that the control output will only change when the speed crosses a speed level explicitly and stably, avoiding frequent adjustments of the current.

[0084] Parameter addressing and current output: The processed parameters are used by the processing module 103 for three-level addressing.

[0085] Step 4.1: First-level addressing (strip width): The system compares the real-time strip width 1550mm with the 8 pre-set width ranges in the database. It finds that 1550mm falls within the range of "1501mm-1600mm", which corresponds to the button in the table below. The system then locks the two-dimensional data matrix associated with the button. Figure 1

[0086] Step 4.2: Second-level addressing (pulling speed and nozzle depth): Then, the system uses the processed strip speed (assuming 1.4 m / min) and the real-time nozzle depth (120mm) as coordinates to perform second-level addressing in the locked two-dimensional data matrix. The system will find the cell with row coordinate "1.4" and column coordinate "120" in the matrix.

[0087] Final value output: Suppose the current value stored in the cell is 410A. This 410A is the final determined "target electromagnetic stirring current value". The processing module 103 sends this value to the control module 104. The control module 104 then adjusts the output of the electromagnetic stirring power supply to stabilize at 410A.

[0088] The entire process from data acquisition to current output is completed in modern PLCs or IPCs in a very short time (usually in milliseconds), fully meeting the real-time control requirements of the continuous casting process.

[0089] ​In summary, the application realizes intelligent, dynamic and accurate control of electromagnetic stirring intensity by establishing a control model of "real-time process parameters -> preset database -> dynamic current output". It not only solves the fundamental defects of the traditional fixed parameter control method, but also takes into account the stability and flexibility of control through data preprocessing and a user-friendly management interface, thereby providing an efficient, practical and economical technical solution for the quality improvement, cost control and automation level improvement of modern continuous steel production.

[0090] Those skilled in the art will easily understand that the above is only a preferred embodiment of the application, and is not intended to limit the application. Any modification, combination, replacement, improvement, etc. made within the spirit and principles of the application is included in the protection scope of the application.

Claims

1. A dynamic control method for electromagnetic stirring of a crystallizer, characterized in that: include: Real-time acquisition of actual process parameters during the continuous casting process, including at least slab width, casting speed, and nozzle immersion depth; Based on the actual process parameters, addressing is performed in a preset database, wherein the database stores mapping relationships between different process parameter combinations and electromagnetic stirring current values; determining a target electromagnetic stirring current value that matches the actual process parameters according to the addressing result; Based on the target electromagnetic stirring current value, the current output of the crystallizer electromagnetic stirring device is controlled.

2. The method according to claim 1, characterized in that Before the step of searching for an address in a preset database based on the actual process parameters, the method further includes: Performing precision adjustment processing on the obtained original value of the casting speed to obtain a processed casting speed value; Wherein, the addressing is performed based on the slab width, the processed casting speed value and the nozzle immersion depth.

3. The method according to claim 2, characterized in that The precision adjustment process further includes: Set the dead zone range; Calculating the difference between the original value of the casting speed and the processed casting speed value; When the difference falls within the dead zone, the current processed casting speed value is maintained unchanged to avoid frequent changes in the target electromagnetic stirring current value due to slight fluctuations in the casting speed.

4. The method according to claim 1, wherein The mapping relationship stored in the database includes a plurality of preset slab width ranges and a two-dimensional data matrix consisting of a plurality of casting speed levels and a plurality of nozzle immersion depth levels corresponding to each slab width range; The addressing step includes: first, determining the target slab width range to which it belongs based on the real-time acquired slab width; then, in a two-dimensional data matrix corresponding to the target slab width range, performing secondary addressing based on the processed casting speed value and water nozzle immersion depth to determine a unique target electromagnetic stirring current value.

5. The method according to claim 1, wherein Also includes: A human-computer interaction interface is provided for manually modifying and saving the mapping relationship stored in the database.

6. A dynamic control system for electromagnetic stirring of a crystallizer, characterized in that: include: A data acquisition module is used to obtain in real time the actual process parameters of the continuous casting production process, including at least slab width, casting speed and nozzle immersion depth; A data storage module is used to store a preset database, wherein the database stores mapping relationships between different process parameter combinations and electromagnetic stirring current values; a processing module connected to the data acquisition module and the data storage module, configured to perform addressing in the database based on the actual process parameters, and determine, according to the addressing result, a target electromagnetic stirring current value that matches the actual process parameters; A control module is connected to the processing module and is used to generate a control instruction based on the target electromagnetic stirring current value to control the current output of the crystallizer electromagnetic stirring device.

7. The system according to claim 6, characterized in that The processing module is further configured to: Performing precision adjustment processing on the obtained original value of the casting speed to obtain a processed casting speed value; And addressing is performed in the database based on the slab width, the processed casting speed value and the nozzle immersion depth.

8. The system according to claim 7, characterized in that When performing the precision adjustment process, the processing module is further used to: According to a preset dead zone range, determining whether the difference between the original value of the casting speed and the processed casting speed value falls within the range; When the difference falls within the dead zone, the current processed casting speed value is maintained unchanged to improve the stability of the control output.

9. The system according to claim 6, wherein: The mapping relationship stored in the data storage module includes a plurality of preset slab width ranges and corresponding two-dimensional data matrices; The addressing process of the processing module is as follows: first, the target slab width range is determined according to the real-time slab width; then, in the corresponding two-dimensional data matrix, secondary addressing is performed according to the processed casting speed value and nozzle immersion depth to determine the target electromagnetic stirring current value.

10. The system according to claim 6, wherein: Also includes: The human-computer interaction module is connected to the data storage module and the processing module, and is used to display the mapping relationship, receive user operation instructions, and manually modify and save the mapping relationship.

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