A method, device, equipment and medium for improving temperature difference of a silicon steel cover furnace steel coil

Abstract

The present application belongs to the technical field of steel metallurgical industry furnace, and particularly relates to a silicon steel hood furnace steel coil temperature difference improvement method, device, equipment and medium, the method comprising: obtaining the temperature value of the silicon steel hood furnace in the high temperature annealing process; determining whether the current annealing stage is in the target annealing stage based on the temperature value in the furnace, the target annealing stage being the stage in which the theoretical temperature difference between the cold spot and the hot spot of the steel coil in the high temperature annealing process is greater than the preset temperature difference threshold; if the current annealing stage is in the target annealing stage, limiting the heating output power of the silicon steel hood furnace heating cover to the target power to reduce the actual temperature difference between the cold spot and the hot spot of the steel coil in the target annealing stage. The present application takes the furnace temperature as the variable, determines the heating output proportion limit in different temperature intervals, and enables the steel coil to be continuously heated according to the specified amount in the current process stage, thereby improving the temperature difference between the cold spot and the hot spot of the steel coil in the high temperature annealing process, reducing the quality difference of the steel coil at different positions, and improving the product quality.

Description

Technical Field

[0001] This invention belongs to the field of furnace technology in the iron and steel metallurgical industry, specifically relating to a method, device, equipment, and medium for improving the temperature difference of steel coils in a silicon steel bell-type furnace. Background Technology

[0002] The bell-type furnace annealing process for silicon steel is a crucial step in silicon steel production, where annealing temperature control directly determines the magnetic and mechanical properties of the finished silicon steel. Traditional high-temperature annealing processes focus on reaching the target temperature, stopping heating when the furnace temperature is set. While this method is simple to operate and has clear control logic, its limitations have become increasingly apparent in practical applications.

[0003] In existing technologies, heating control in bell-type furnaces largely relies on monitoring and adjusting the furnace ambient temperature, lacking direct consideration of the heat absorption state of the steel coil itself. Due to factors such as uneven initial temperature distribution, geometric differences, and charging methods during furnace loading, the actual heat absorption of different parts of the silicon steel coil varies significantly during the heating process. Traditional temperature control methods can only ensure that the furnace atmosphere temperature reaches the set value, but cannot ensure that the interior of the steel coil, especially the core and edges, and cold and hot spots, absorbs sufficient and uniform heat. This results in significant temperature differences between the surface and interior of the steel coil, and between different locations, during annealing, creating obvious hot and cold spot temperature differences.

[0004] This uneven temperature distribution further leads to asynchronous recrystallization processes and inconsistent grain growth in silicon steel, resulting in differences in grain structure and texture in different parts of the same steel coil. Ultimately, this affects the consistency of key performance indicators such as magnetic induction intensity and iron loss in silicon steel products. Especially in the production of high-end silicon steel products, such quality fluctuations can seriously affect the product's pass rate and performance.

[0005] Therefore, although traditional temperature control is still applicable in some conventional heat treatment scenarios, it is difficult to meet the current needs of high-quality silicon steel production in the high-temperature annealing process of silicon steel, which has extremely high requirements for temperature uniformity and heat absorption stability. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies, this invention provides a method for improving the temperature difference of steel coils in a silicon steel bell-type furnace. The aim is to ensure temperature accuracy while effectively improving the overall temperature uniformity of the steel coils, thereby ensuring the consistency and stability of silicon steel product performance.

[0007] To solve at least one of the above-mentioned technical problems, in a first aspect, the present invention provides a method for improving the temperature difference of steel coils in a silicon steel bell-type furnace, the method comprising: Obtain the furnace temperature value of the silicon steel bell-type furnace during the high-temperature annealing process; Based on the furnace temperature value, it is determined whether the current annealing stage is in the target annealing stage, which is the stage in which the theoretical temperature difference between the hot and cold spots of the steel coil is greater than a preset temperature difference threshold during high-temperature annealing. If the current annealing stage is in the target annealing stage, the heating output power of the silicon steel bell furnace heating hood is limited to the target power to reduce the actual temperature difference between the hot and cold spots of the steel coil in the target annealing stage.

[0008] Optionally, the target annealing stage includes: the end stage of the first soaking stage, the early stage of the second heating stage, the late stage of the second heating stage, and the early stage of the second soaking stage; Determining whether the current annealing stage is in the target annealing stage based on the furnace temperature value includes: If the current furnace temperature is in the first temperature range, the current annealing stage is determined to be the end stage of the first soaking stage; If the furnace temperature value is in the second temperature range, the current annealing stage is determined to be the early stage of the second heating section. If the furnace temperature is in the third temperature range, the current annealing stage is determined to be the later stage of the second heating section; If the furnace temperature is in the fourth temperature range, the current annealing stage is determined to be the early stage of the second soaking stage.

[0009] Optionally, the first temperature range is 730℃-760℃, the second temperature range is 760℃-850℃, the third temperature range is 1000℃-1050℃, and the fourth temperature range is 1120℃-1215℃.

[0010] Optionally, the silicon steel bell-type furnace heating hood is provided with at least one heating zone, and limiting the heating output power of the silicon steel bell-type furnace heating hood to a target power includes: At the end of the first heat soaking stage, the heating output power of the at least one heating zone is limited to a first target power, which is 10%-15% of the rated output power of the at least one heating zone; In the early stage of the second heating section, the heating output power of the at least one heating zone is limited to a second target power, which is 60%-80% of the rated output power of the at least one heating zone; In the later stage of the second heating section, the heating output power of the at least one heating zone is limited to a third target power, which is 60%-80% of the rated output power of the at least one heating zone; In the early stage of the second heat-spreading section, the heating output power of the at least one heating zone is limited to a fourth target power, which is 60%-80% of the rated output power of the at least one heating zone.

[0011] Optionally, obtaining the furnace temperature value of the silicon steel bell-type furnace during the high-temperature annealing process includes: After all annealing stages are completed, obtain the actual temperature difference between the hot and cold spots of the steel coil; If the actual temperature difference between the hot and cold spots exceeds the preset temperature difference threshold, the temperature difference rate between the actual temperature difference between the hot and cold spots and the preset temperature difference threshold is determined; The heating output power of the silicon steel bell-type furnace heating hood is adjusted based on the temperature difference rate during the corresponding annealing stage of the next batch of steel coils.

[0012] Optionally, the method further includes: After all annealing stages are completed, the temperature values ​​at various locations on the steel coil are obtained to determine the maximum temperature difference of the steel coil; If the maximum temperature difference exceeds the preset temperature difference threshold, determine the temperature difference rate between the maximum temperature difference and the preset temperature difference threshold; The heating output power of the silicon steel bell-type furnace heating hood is adjusted based on the temperature difference rate during the corresponding annealing stage of the next batch of steel coils.

[0013] Secondly, embodiments of the present invention also provide a device for improving the temperature difference of steel coils in a silicon steel bell-type furnace, the device comprising: The temperature acquisition module is used to acquire the furnace temperature value of the silicon steel bell furnace during the high-temperature annealing process; The stage determination module is used to determine whether the current annealing stage is in the target annealing stage based on the furnace temperature value. The target annealing stage is the stage in which the theoretical temperature difference between the hot and cold spots of the steel coil is greater than a preset temperature difference threshold during high-temperature annealing. The temperature control module is used to limit the heating output power of the silicon steel bell furnace heating hood to the target power if the current annealing stage is in the target annealing stage, so as to reduce the actual temperature difference between the hot and cold spots of the steel coil in the target annealing stage.

[0014] To achieve the above objectives, according to a third aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium comprising a stored program, wherein, when the program is executed by a processor, the steps of the above-described method for improving the temperature difference of steel coils in a silicon steel bell-type furnace are implemented.

[0015] To achieve the above objectives, according to a fourth aspect of the present invention, an electronic device is provided, comprising at least one processor and at least one memory connected to the processor; wherein the processor is configured to invoke program instructions in the memory to execute the steps of the above-described method for improving the temperature difference of steel coils in a silicon steel bell-type furnace.

[0016] By utilizing the above technical solutions, the present invention provides a method, apparatus, equipment, and medium for improving the temperature difference of steel coils in a bell-type furnace for silicon steel. By acquiring the temperature value inside the furnace, it determines whether the current stage is the target annealing stage where the theoretical temperature difference between hot and cold spots of the steel coil is greater than a preset threshold. If it is in this stage, the heating output power of the heating hood is limited to the target power, effectively reducing the actual temperature difference between hot and cold spots of the steel coil in the target annealing stage. This solves the problem that traditional temperature control methods cannot ensure uniform heat absorption inside the steel coil, resulting in a large temperature difference between hot and cold spots, which in turn affects the consistency of key performance indicators of silicon steel products. This meets the high requirements of high-quality silicon steel production for temperature uniformity and heat absorption stability.

[0017] Correspondingly, the silicon steel bell-type furnace coil temperature difference improvement device, equipment, and computer-readable storage medium provided in the embodiments of the present invention also have the above-mentioned technical effects. The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can also be implemented according to the contents of the specification. Furthermore, in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A schematic flowchart of a method for improving the temperature difference of steel coils in a silicon steel bell-type furnace provided by an embodiment of the present invention is shown. Figure 2 A flowchart of step S1 provided in an embodiment of the present invention is shown; Figure 3 A flowchart of step S2 provided in an embodiment of the present invention is shown; Figure 4 A flowchart of step S3 provided in an embodiment of the present invention is shown; Figure 5 The flowchart of temperature difference control at each stage of the silicon steel bell-type furnace annealing process provided in the embodiment of the present invention is shown. Figure 6 The diagram illustrates manual and automatic control provided in an embodiment of the present invention. Figure 7 A schematic flowchart of another method for improving the temperature difference of steel coils in a silicon steel bell furnace provided by an embodiment of the present invention is shown. Figure 8 A schematic block diagram of the silicon steel bell-type furnace coil temperature difference improvement device provided in an embodiment of the present invention is shown. Figure 9A schematic block diagram of the electronic device for improving the temperature difference of steel coils in a silicon steel bell-type furnace provided in an embodiment of the present invention is shown. Detailed Implementation

[0019] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0020] To address the current problems of high surface temperature and low internal temperature in steel coils, resulting in a large temperature difference between hot and cold spots, this invention provides a method for improving the temperature difference of steel coils in a silicon steel bell-type furnace. Figure 1 This diagram illustrates a process flow chart of a method for improving the temperature difference of steel coils in a silicon steel bell-type furnace, as provided in an embodiment of the present invention. Figure 1 As shown, the method includes: Step S1: Obtain the furnace temperature value of the silicon steel bell-type furnace during the high-temperature annealing process.

[0021] For example, the temperature inside a silicon steel bell-type furnace can be monitored in real time by a temperature acquisition device, which includes, but is not limited to, temperature sensors, infrared thermometers, and other tools that can measure temperature.

[0022] Step S2: Determine whether the current annealing stage is in the target annealing stage based on the furnace temperature value. The target annealing stage is the stage in which the theoretical temperature difference between the hot and cold spots of the steel coil is greater than the preset temperature difference threshold during high-temperature annealing. The theoretical temperature difference between hot and cold spots refers to the theoretical difference between the highest and lowest temperatures achievable at different locations on the steel coil during high-temperature annealing. This theoretical temperature difference can be determined by those skilled in the art based on practical experience. For example, the average or maximum value of the actual temperature differences between hot and cold spots at various stages of historical high-temperature annealing processes can be used as the theoretical temperature difference for that stage. Based on this, the annealing stage where the theoretical temperature difference between hot and cold spots exceeds a preset temperature difference threshold can be designated as the target annealing stage. The actual temperature difference between hot and cold spots mentioned here refers to the actual temperature difference between the highest and lowest temperatures at different locations on the steel coil during the annealing process, which can be monitored in real time by a temperature acquisition device.

[0023] It should be noted that the high-temperature annealing process of steel coils typically includes multiple stages. The temperature settings for each stage are determined by the variable values ​​of the high-temperature annealing process curve. That is, the current annealing stage is determined based on the pre-defined temperature ranges for each stage in the high-temperature annealing process curve. The high-temperature annealing process curves differ for steel coils of different thicknesses and materials. Therefore, the temperature ranges for each annealing stage can be flexibly set according to the thickness and material of the steel coil. When the thickness of the steel coil decreases, the temperature ranges for each annealing stage will also decrease accordingly. Similarly, when the material of the steel coil changes, the temperature ranges for each annealing stage will also change accordingly. This application does not constitute a specific limitation in this regard.

[0024] Step S3: If the current annealing stage is the target annealing stage, limit the heating output power of the silicon steel bell furnace heating hood to the target power in order to reduce the actual temperature difference between the hot and cold spots of the steel coil in the target annealing stage.

[0025] As mentioned earlier, current traditional temperature control methods focus on controlling the target heating temperature, stopping heating once the actual furnace temperature reaches the target temperature. This results in the actual heat absorbed by the steel coil not being guaranteed, leading to significant temperature differences between the surface and interior of the coil, as well as between different locations. This creates obvious hot and cold spot temperature differences, causing quality variations in different parts of the silicon steel coil and affecting product quality.

[0026] This application monitors the entire annealing process and distinguishes between different annealing stages according to different temperature ranges. It sets different power output ratios for each annealing stage, so that the steel coil can be continuously heated according to the specified output during the current process stage, thereby reducing the temperature difference between hot and cold spots.

[0027] Correspondingly, the high-temperature annealing process curves of steel coils with different thicknesses and materials are different. Therefore, the temperature range of each annealing stage can be flexibly set according to the thickness and material of the steel coil, and the power output ratio required for each annealing stage is also different. This application does not constitute a specific limitation in this regard.

[0028] Figure 2 A flowchart of step S1 provided in an embodiment of the present invention is shown, as follows: Figure 2 As shown, in one embodiment, step S1, obtaining the furnace temperature value of the silicon steel bell-type furnace during the high-temperature annealing process, includes: Step S101: Obtain the temperature inside the silicon steel bell-type furnace collected by at least one temperature acquisition device. The at least one temperature acquisition device is distributed in different positions of the silicon steel bell-type furnace to collect the furnace temperature from different positions.

[0029] Step S102: Determine the furnace temperature value based on the temperature inside the silicon steel bell furnace collected by at least one temperature acquisition device.

[0030] Specifically, taking three temperature sensors installed in the space of the heating hood of the silicon steel bell-type furnace as an example, the temperature values ​​they measure are 740℃, 750℃ and 760℃ respectively. The average value of the three temperature values ​​is 750℃, so the furnace temperature inside the silicon steel bell-type furnace is 750℃ at this time.

[0031] In one embodiment, the target annealing stage in step S2 includes: the end stage of the first soaking stage, the early stage of the second heating stage, the late stage of the second heating stage, and the early stage of the second soaking stage.

[0032] Figure 3 A flowchart of step S2 provided in an embodiment of the present invention is shown, as follows: Figure 3 As shown, step S2, determining whether the current annealing stage is in the target annealing stage based on the furnace temperature value, includes: Step S201: If the current furnace temperature is in the first temperature range, determine that the current annealing stage is the end stage of the first soaking stage; Step S202: If the furnace temperature is in the second temperature range, determine that the current annealing stage is the early stage of the second heating section; Step S203: If the furnace temperature is in the third temperature range, determine that the current annealing stage is the later stage of the second heating section; Step S204: If the furnace temperature is in the fourth temperature range, determine that the current annealing stage is the early stage of the second soaking stage.

[0033] In one possible embodiment, the first temperature range is 730℃-760℃, the second temperature range is 760℃-850℃, the third temperature range is 1000℃-1050℃, and the fourth temperature range is 1120℃-1215℃.

[0034] Taking the furnace temperature of the silicon steel bell-type furnace in the above embodiment as an example, which is 750°C, it is located in the first temperature range of 730°C-760°C. Therefore, it can be determined that the corresponding annealing stage is the end stage of the first soaking stage.

[0035] In one embodiment, the silicon steel bell furnace has at least one heating zone. Figure 4 A flowchart of step S3 provided in an embodiment of the present invention is shown, as follows: Figure 4 As shown, step S3, limiting the heating output power of the silicon steel bell-type furnace heating hood to the target power, includes: Step S301: At the end of the first heating stage, the heating output power of at least one heating zone is limited to a first target power, which is 10%-15% of the rated output power of at least one heating zone.

[0036] Step S302: In the early stage of the second heating section, the heating output power of at least one heating zone is limited to the second target power, which is 60%-80% of the rated output power of at least one heating zone.

[0037] Step S303: In the later stage of the second heating section, the heating output power of at least one heating zone is limited to a third target power, which is 60%-80% of the rated output power of at least one heating zone.

[0038] Step S304: In the early stage of the second heat soaking section, the heating output power of at least one heating zone is limited to the fourth target power, which is 60%-80% of the rated output power of at least one heating zone.

[0039] If the temperature inside the silicon steel bell-type furnace is not within the above-mentioned temperature range, then it is in the non-target annealing stage. In this non-target annealing stage, each heating zone of the silicon steel bell-type furnace heating hood will heat and output normally according to the rated output power.

[0040] Specifically, Figure 5 The following is a flowchart illustrating the temperature difference control process at each stage of the silicon steel bell-type furnace annealing process for steel coils provided in an embodiment of the present invention, as shown below. Figure 5 As shown, for the annealing stages not mentioned above, such as the first soaking zone, the middle of the second heating zone, the second soaking zone, and subsequent process stages, these are all non-target annealing stages. The heating zones of the silicon steel bell furnace heating hood are heated and output normally at the rated output power.

[0041] The aforementioned specially designed target annealing stage falls under the four critical stages in the high-temperature annealing process where the temperature difference between hot and cold spots is significant. Restoring normal power output during non-target annealing stages ensures that the steel coil receives sufficient total heat input throughout the overall annealing cycle. This concentrates resources and control efforts on the specific stages where the temperature difference between hot and cold spots is greatest and most critical to the final quality uniformity. In stages where the temperature difference issue is less pronounced, the efficient and direct traditional temperature control mode is reverted. This strategy of precise control at critical points and efficient operation at non-critical points achieves an optimal balance between quality control and production efficiency.

[0042] In one embodiment, the silicon steel bell-type furnace has six heating zones, wherein the rated output power of the first and second heating zones is 258 kW; the rated output power of the second and third heating zones is 232 kW; and the rated output power of the fourth and fifth heating zones is 103 kW. Therefore, when limiting the heating output power of each heating zone to the corresponding target power, adjustments can be made based on the rated output power of each heating zone.

[0043] Specifically, taking the final stage of the first soaking stage as an example, at this time, the heating output power of the corresponding heating zone needs to be limited to 10%-15% of the rated output power. Then, the power range of the first and second heating zones of the silicon steel bell furnace heating hood is 25.8Kw-38.1Kw; the power range of the second and third heating zones is 23.2Kw-34.8Kw; and the power range of the fifth and sixth heating zones is 10.3Kw-15.45Kw.

[0044] Taking the later stage of the second heating section as an example, at this time, the heating output power of the corresponding heating zone needs to be limited to 60%-80% of the rated output power. Then, the power range of the first and second heating zones of the silicon steel bell furnace heating hood is 154.8Kw-206.4Kw; the power range of the second and third heating zones is 139.2Kw-185.6Kw; and the power range of the fifth and sixth heating zones is 61.8Kw-82.4Kw.

[0045] It is worth mentioning that the number of heating zones, their relative positions, and the rated output power in the aforementioned silicon steel bell-type furnace heating hood can all be adjusted according to actual conditions. For example, in another embodiment, the silicon steel bell-type furnace heating hood is provided with 8 heating zones, which are arranged symmetrically in pairs within the hood. The rated output power of each heating zone can be set independently.

[0046] Figure 6 The diagram illustrates manual and automatic control provided in an embodiment of the present invention, as shown below. Figure 6 As shown, the temperature of each heating zone can be switched between manual control and automatic mode. In manual control mode, the operator can manually input the output ratio of each heating zone through relevant equipment; while in automatic mode, once the temperature and power ranges of each heating zone are set, and the temperature of each heating zone reaches the set range, the power range of each heating zone will be automatically adjusted within the set power range.

[0047] Figure 7 This invention provides a schematic flowchart of another method for improving the temperature difference of steel coils in a silicon steel bell-type furnace, as illustrated in an embodiment of the invention. Figure 7 As shown, in one embodiment, the method for improving the temperature difference of steel coils in a silicon steel bell-type furnace may include, in addition to the steps S1 to S3 described above: Step S4: After all annealing stages are completed, obtain the actual temperature difference between the hot and cold spots of the steel coil.

[0048] Step S5: If the actual temperature difference between the hot and cold spots exceeds the preset temperature difference threshold, determine the temperature difference rate between the actual temperature difference between the hot and cold spots and the preset temperature difference threshold.

[0049] Step S6: Adjust the heating output power of the silicon steel bell-type furnace heating hood in the corresponding annealing stage of the next batch of steel coils based on the temperature difference rate.

[0050] The actual temperature difference between hot and cold spots refers to the actual temperature difference between the highest and lowest temperature points at different locations on the steel coil during the high-temperature annealing process. This difference can be obtained in real time through a temperature acquisition device. The temperature difference rate between the actual temperature difference between hot and cold spots and the preset temperature difference threshold can be determined based on the following method: Temperature difference rate = (Actual temperature difference between hot and cold spots - Preset temperature difference threshold) / Preset temperature difference threshold × 100%; Specifically, after the annealing process, the temperatures at different locations on the surface and inside of the steel coil, collected by three temperature sensors, were 1300℃, 1302℃, and 1306℃, respectively. Therefore, the maximum temperature difference between the hot and cold spots of the steel coil at this point was 6℃. Taking a preset temperature difference threshold of 5℃ as an example, the temperature difference rate between the hot and cold spots of the steel coil in this annealing process was 20%. The target power setting for each target annealing stage of the next heat of steel coil was then adjusted by 20% based on the target power of the corresponding stage in this process, ensuring that the temperature difference at each location in the next heat of steel coil meets the set difference value.

[0051] Through real-time feedback and fine-tuning, the above method can proactively compensate for interference caused by changes in furnace conditions, raw material differences, and equipment status fluctuations, resulting in more stable and consistent annealing quality for each heat of steel coil. This is crucial for ensuring the uniformity and reliability of product performance in large-scale industrial production, meeting the production requirements of high-quality silicon steel.

[0052] Based on the same inventive concept, the present invention also provides a silicon steel bell-type furnace coil temperature difference improvement device for achieving the above-mentioned... Figure 1 The method is shown. This device embodiment corresponds to the foregoing method embodiment. For ease of reading, this device embodiment will not repeat the details of the foregoing method embodiment one by one, but it should be clear that the device in this embodiment can implement all the contents of the foregoing method embodiment. Figure 8 A schematic block diagram of the silicon steel bell-type furnace coil temperature difference improvement device provided in an embodiment of the present invention is shown, as follows: Figure 8 As shown, the device 70 includes: Temperature acquisition module 701 is used to acquire the furnace temperature value of silicon steel bell furnace during high-temperature annealing; The stage determination module 702 is used to determine whether the current annealing stage is in the target annealing stage based on the furnace temperature value. The target annealing stage is the stage in which the theoretical temperature difference between the hot and cold spots of the steel coil is greater than the preset temperature difference threshold during high-temperature annealing. The temperature control module 703 is used to limit the heating output power of the silicon steel bell furnace heating hood to the target power if the current annealing stage is in the target annealing stage, so as to reduce the actual temperature difference between the hot and cold spots of the steel coil in the target annealing stage.

[0053] This invention provides a computer-readable storage medium including a stored program that, when executed by a processor, implements a method for improving the temperature difference of steel coils in a silicon steel bell-type furnace.

[0054] This invention provides a processor for running a program, wherein the program executes the method for improving the temperature difference of steel coils in a silicon steel bell-type furnace.

[0055] This invention provides an electronic device, which includes at least one processor and at least one memory connected to the processor; wherein the processor is used to call program instructions in the memory to execute the method for improving the temperature difference of steel coils in a silicon steel bell furnace as described above.

[0056] This invention provides an electronic device 80, such as... Figure 9 As shown, the electronic device includes at least one processor 801, and at least one memory 802 and bus 803 connected to the processor; wherein, the processor 801 and the memory 802 communicate with each other through the bus 803; the processor 804 is used to call program instructions in the memory to execute the above-mentioned method for improving the temperature difference of silicon steel bell furnace coils. The electronic devices mentioned in this article can be PLC-controlled devices.

[0057] This application also provides a computer program product that, when executed on a process management electronic device, is suitable for executing a program that initializes the steps of the above-described method for improving the temperature difference of steel coils in a silicon steel bell-type furnace. It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments. Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROMs) containing computer-usable program code. The form of a computer program product implemented on ROM, optical memory, etc.

[0058] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes. These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0059] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0060] This application also provides a computer program product, which includes computer software instructions that, when executed on a processing device, cause the processing device to perform actions such as... Figure 1 The control flow of the memory in the corresponding embodiment.

[0061] A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk (SSD)). Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0062] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between apparatuses or units, and may be electrical, mechanical, or other forms.

[0063] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0064] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0065] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0066] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A method for improving the temperature difference of steel coils in a silicon steel bell-type furnace, characterized in that, The method includes: Obtain the furnace temperature value of the silicon steel bell-type furnace during the high-temperature annealing process; Based on the furnace temperature value, it is determined whether the current annealing stage is in the target annealing stage, which is the stage in which the theoretical temperature difference between the hot and cold spots of the steel coil is greater than a preset temperature difference threshold during high-temperature annealing. If the current annealing stage is in the target annealing stage, the heating output power of the silicon steel bell furnace heating hood is limited to the target power to reduce the actual temperature difference between the hot and cold spots of the steel coil in the target annealing stage.

2. The method according to claim 1, characterized in that, The target annealing stage includes: the end stage of the first soaking stage, the early stage of the second heating stage, the late stage of the second heating stage, and the early stage of the second soaking stage; Determining whether the current annealing stage is in the target annealing stage based on the furnace temperature value includes: If the current furnace temperature is in the first temperature range, the current annealing stage is determined to be the end stage of the first soaking stage; If the furnace temperature value is in the second temperature range, the current annealing stage is determined to be the early stage of the second heating section. If the furnace temperature is in the third temperature range, the current annealing stage is determined to be the later stage of the second heating section; If the furnace temperature is in the fourth temperature range, the current annealing stage is determined to be the early stage of the second soaking stage.

3. The method according to claim 2, characterized in that, The first temperature range is 730℃-760℃, the second temperature range is 760℃-850℃, the third temperature range is 1000℃-1050℃, and the fourth temperature range is 1120℃-1215℃.

4. The method according to claim 2, characterized in that, The silicon steel bell-type furnace heating hood has at least one heating zone, and limiting the heating output power of the silicon steel bell-type furnace heating hood to a target power includes: At the end of the first heat soaking stage, the heating output power of the at least one heating zone is limited to a first target power, which is 10%-15% of the rated output power of the at least one heating zone; In the early stage of the second heating section, the heating output power of the at least one heating zone is limited to a second target power, which is 60%-80% of the rated output power of the at least one heating zone; In the later stage of the second heating section, the heating output power of the at least one heating zone is limited to a third target power, which is 60%-80% of the rated output power of the at least one heating zone; In the early stage of the second heat-spreading section, the heating output power of the at least one heating zone is limited to a fourth target power, which is 60%-80% of the rated output power of the at least one heating zone.

5. The method according to claim 4, characterized in that, The silicon steel bell-type furnace is equipped with six heating zones. The rated output power of the first and second heating zones is 258 kW; the rated output power of the second and third heating zones is 232 kW; and the rated output power of the fourth and fifth heating zones is 103 kW.

6. The method according to claim 1, characterized in that, The process of obtaining the furnace temperature value of the silicon steel bell-type furnace during high-temperature annealing includes: The temperature inside the silicon steel bell-type furnace is acquired by at least one temperature acquisition device, wherein the at least one temperature acquisition device is distributed in different positions of the silicon steel bell-type furnace and is used to acquire the furnace temperature from different positions. The furnace temperature value is determined based on the temperature inside the silicon steel bell furnace collected by the at least one temperature acquisition device.

7. The method according to claim 1, characterized in that, The method further includes: After all annealing stages are completed, obtain the actual temperature difference between the hot and cold spots of the steel coil; If the actual temperature difference between the hot and cold spots exceeds the preset temperature difference threshold, the temperature difference rate between the actual temperature difference between the hot and cold spots and the preset temperature difference threshold is determined; The heating output power of the silicon steel bell-type furnace heating hood is adjusted based on the temperature difference rate during the corresponding annealing stage of the next batch of steel coils.

8. A device for improving the temperature difference of steel coils in a silicon steel bell-type furnace, characterized in that, The device includes: The temperature acquisition module is used to acquire the furnace temperature value of the silicon steel bell furnace during the high-temperature annealing process; The stage determination module is used to determine whether the current annealing stage is in the target annealing stage based on the furnace temperature value. The target annealing stage is the stage in which the theoretical temperature difference between the hot and cold spots of the steel coil is greater than a preset temperature difference threshold during high-temperature annealing. The temperature control module is used to limit the heating output power of the silicon steel bell furnace heating hood to the target power if the current annealing stage is in the target annealing stage, so as to reduce the actual temperature difference between the hot and cold spots of the steel coil in the target annealing stage.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein, when the program is executed by a processor, it implements the steps of the method for improving the temperature difference of steel coils in a silicon steel bell-type furnace as described in any one of claims 1 to 7.

10. An electronic device, characterized in that, The electronic device includes at least one processor and at least one memory connected to the processor; wherein the processor is used to call program instructions in the memory to execute the steps of the method for improving the temperature difference of steel coils in a silicon steel bell furnace as described in any one of claims 1 to 7.

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