A slab continuous casting control method, device, equipment and medium

Abstract

This invention discloses a method, apparatus, equipment, and medium for controlling slab continuous casting, comprising: determining a reference area for the target slag line crack within the crystallizer based on the set liquid level parameters corresponding to the current casting process and the actual state of the crystallizer; determining the target liquid level parameters of the crystallizer after entering the final stage in the current casting process below the reference area; and controlling the liquid level parameters of the crystallizer to change from the set liquid level parameters to the target liquid level parameters in response to a trigger signal indicating that the current casting process has entered the final stage. This invention utilizes the adjustable liquid level of the casting machine's crystallizer to rationally adjust the crystallizer liquid level, ensuring that the solidification front of the slab during the final stage avoids the slag line position in the casting process, while simultaneously increasing the cooling intensity of the crystallizer and reducing the overall hot surface temperature of the copper plate, thus providing dual protection against scratches caused by irregular tail slabs on the copper plate.

Description

Technical Field

[0001] This invention relates to the field of rolling technology, and more particularly to a method, apparatus, equipment and medium for controlling continuous casting of slabs. Background Technology

[0002] During the continuous casting of thin slabs, at the end of each casting cycle, molten steel seeps into the cracks in the slag line of the crystallizer before solidification. Since no fresh molten steel subsequently enters the cracks, the steel that has entered will cool and solidify within the cracks, forming protrusions. As the tail slab descends, these protrusions scratch the inner wall of the crystallizer, shortening its service life. Therefore, reducing the frequency of crystallizer wall scratches caused by slag line cracks is a pressing issue that needs to be addressed. Summary of the Invention

[0003] This application provides a slab continuous casting control method, device, equipment, and medium, which solves the technical problem of high frequency of crystal wall scratches caused by slag line cracks in the prior art, and achieves the technical effect of reducing the frequency of crystal wall scratches caused by slag line cracks.

[0004] In a first aspect, this application provides a method for controlling slab continuous casting, the method comprising:

[0005] Based on the set liquid level parameters corresponding to the current casting process and the actual state of the crystallizer, determine the reference area of ​​the target slag line crack in the crystallizer;

[0006] Below the reference area, determine the target liquid level parameters of the crystallizer after it enters the final stage of the current casting process;

[0007] In response to the trigger signal indicating that the current casting process has entered the final stage, the liquid level parameter of the crystallizer is changed from the set liquid level parameter to the target liquid level parameter, so that the crystallizer completes the final stage of the current casting process while in the state corresponding to the target liquid level parameter.

[0008] Furthermore, the method also includes:

[0009] In response to the trigger signal indicating that the current casting process has entered the final stage, the cooling intensity of the crystallizer is increased.

[0010] Furthermore, the cooling intensity of the crystallizer is increased, including:

[0011] The cooling intensity of the crystallizer is increased to its maximum value.

[0012] Furthermore, based on the set liquid level parameters corresponding to the current casting process and the actual state of the crystallizer, the reference area for the target slag line crack within the crystallizer is determined, including:

[0013] Based on the set liquid level parameters corresponding to the current casting process, determine the new slag line cracks generated in the crystallizer during the current casting process and their location.

[0014] Based on the actual condition of the crystallizer before the start of the current casting, determine whether there are any unrepaired old slag line cracks in the crystallizer and their location.

[0015] Based on the relative elevations of the new and old slag line cracks, the target slag line crack is identified from the new and old slag line cracks, and the area where the target slag line crack is located is used as a reference area.

[0016] Furthermore, based on the set liquid level parameters corresponding to the current casting process, the new slag line cracks generated in the crystallizer during the current casting process and their location are determined, including:

[0017] Based on the set liquid level parameters corresponding to the current casting process and the fluctuation range of molten steel when the crystallizer is filled with molten steel, determine the new slag line cracks generated in the crystallizer during the current casting process and their location.

[0018] Furthermore, below the reference area, the target liquid level parameters of the crystallizer after entering the final stage of the current casting process are determined, including:

[0019] Based on the set liquid level parameters corresponding to the current casting process and the fluctuation range of molten steel when the crystallizer is filled with molten steel, determine the minimum liquid level parameters of molten steel when the crystallizer is filled with molten steel.

[0020] Based on the corresponding safe liquid level adjustment parameters during production and the minimum liquid level parameters of molten steel when the crystallizer is filled with molten steel, the target liquid level parameters of the crystallizer after entering the final stage of the current casting process are determined on the lower side of the reference area.

[0021] Furthermore, after the crystallizer completes the final stage of the current casting process, the method also includes:

[0022] Repair the slag line cracks in the crystallizer, and proceed to the next casting process after repair.

[0023] Secondly, this application provides a slab continuous casting control device, the device comprising:

[0024] The reference area determination module is used to determine the reference area of ​​the target slag line crack in the crystallizer based on the set liquid level parameters corresponding to the current casting process and the actual state of the crystallizer.

[0025] The target liquid level parameter determination module is used to determine the target liquid level parameter of the crystallizer after it enters the final stage of the current casting process, on the lower side of the reference area.

[0026] The adjustment module is used to respond to the trigger signal that the current casting process has entered the final stage, and control the liquid level parameter of the crystallizer to change from the set liquid level parameter to the target liquid level parameter, so that the crystallizer completes the final stage of the current casting process in the state corresponding to the target liquid level parameter.

[0027] Thirdly, this application provides an electronic device, comprising:

[0028] processor;

[0029] Memory used to store processor-executable instructions;

[0030] The processor is configured to execute a slab continuous casting control method as provided in the first aspect.

[0031] Fourthly, this application provides a non-transitory computer-readable storage medium that, when the instructions in the storage medium are executed by the processor of an electronic device, enables the electronic device to perform a slab continuous casting control method as provided in the first aspect.

[0032] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0033] This application utilizes the adjustable liquid level of the casting machine's crystallizer to rationally adjust the crystallizer level. This ensures that the solidification front of the billet during the final stage avoids the slag line position in the casting process, while simultaneously increasing the cooling intensity of the crystallizer and reducing the overall hot surface temperature of the copper plate. This dual protection avoids scratches on the copper plate caused by irregular billets. In other words, this application determines the target liquid level parameter for the final stage based on the location of the target slag line crack. After entering the final stage of the current casting process, the set liquid level parameter is changed to the target liquid level parameter, ensuring that the crystallizer completes the final stage of the current casting process at the state corresponding to the target liquid level parameter. The target liquid level parameter is lower than the set liquid level parameter, or in other words, lower than the lowest liquid level parameter within the actual liquid level range. Essentially, this ensures that the molten steel level in the final stage is below the target slag line crack, thereby reducing the probability of molten steel entering the slag line crack and thus reducing the probability of protrusion formation, which in turn reduces scratches caused by protrusions during their descent. In a preferred embodiment, the solution provided in this application can keep the molten steel level below the target slag line crack during the final stage, thereby preventing the molten steel from entering the slag line crack and thus preventing the formation of a protrusion, which would cause scratches to the crystallizer during the downward movement of the protrusion.

[0034] In addition, because the solution provided in this application embodiment can reduce the probability of molten steel entering cracks in the final stage, it can further reduce the probability of cracks becoming larger and deeper due to molten steel entering cracks, thereby further extending the online turnover life of the crystallizer. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 A flowchart illustrating a slab continuous casting control method provided in this application;

[0037] Figure 2 A schematic diagram of the structure of a slab continuous casting control device provided in this application;

[0038] Figure 3 This is a schematic diagram of the structure of an electronic device provided in this application. Detailed Implementation

[0039] This application provides a slab continuous casting control method, which solves the technical problem of the high frequency of crystal wall scratches caused by slag line cracks in the prior art.

[0040] The technical solution of this application embodiment is to solve the above-mentioned technical problems, and the general idea is as follows:

[0041] A method for controlling slab continuous casting includes: determining a reference region for a target slag line crack in the crystallizer based on the set liquid level parameters corresponding to the current casting process and the actual state of the crystallizer; determining a target liquid level parameter for the crystallizer after entering the final stage of the current casting process on the lower side of the reference region; and controlling the liquid level parameter of the crystallizer to change from the set liquid level parameter to the target liquid level parameter in response to a trigger signal indicating that the current casting process has entered the final stage, so that the crystallizer completes the final stage of the current casting process while in the state corresponding to the target liquid level parameter.

[0042] This application utilizes the adjustable liquid level of the casting machine's crystallizer to rationally adjust the crystallizer level. This ensures that the solidification front of the billet during the final stage avoids the slag line position in the casting process, while simultaneously increasing the cooling intensity of the crystallizer and reducing the overall hot surface temperature of the copper plate. This dual protection avoids scratches on the copper plate caused by irregular billets. In other words, this application determines the target liquid level parameter for the final stage based on the location of the target slag line crack. After entering the final stage of the current casting process, the set liquid level parameter is changed to the target liquid level parameter, ensuring that the crystallizer completes the final stage of the current casting process at the state corresponding to the target liquid level parameter. The target liquid level parameter is lower than the set liquid level parameter, or in other words, lower than the lowest liquid level parameter within the actual liquid level range. Essentially, this ensures that the molten steel level in the final stage is below the target slag line crack, thereby reducing the probability of molten steel entering the slag line crack and thus reducing the probability of protrusion formation, which in turn reduces scratches caused by protrusions during their descent. In a preferred embodiment, the solution provided in this application can keep the molten steel level below the target slag line crack during the final stage, thereby preventing the molten steel from entering the slag line crack and thus preventing the formation of a protrusion, which would cause scratches to the crystallizer during the downward movement of the protrusion.

[0043] In addition, because the solution provided in this application embodiment can reduce the probability of molten steel entering cracks in the final stage, it can further reduce the probability of cracks becoming larger and deeper due to molten steel entering cracks, thereby further extending the online turnover life of the crystallizer.

[0044] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0045] First, it should be clarified that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0046] Thin slab continuous casting involves higher casting speeds than conventional slab continuous casting, resulting in higher hot-face temperatures at the slag line of the copper plate in the crystallizer, making the slag line prone to micro-cracks. During the final casting cycle, molten steel at the solidification front seeps into these slag line cracks and cools within them. Because no fresh molten steel enters the cracks afterward, and the casting speed is lower at the end, the upper part of the slab solidifies rapidly, forming a protrusion at the end of the slab. When the solidified slab is pulled from the crystallizer, this protrusion scratches the copper plate in the casting direction, creating scratches similar to "cat's claws." These scratches are relatively long in the casting direction, causing irreversible damage to the copper plate and significantly shortening the crystallizer's lifespan.

[0047] To address the aforementioned problems, this application provides the following: Figure 1 The method shown is a slab continuous casting control method, which includes steps S11-S13.

[0048] Step S11: Determine the reference area of ​​the target slag line crack in the crystallizer based on the set liquid level parameters corresponding to the current casting process and the actual state of the crystallizer.

[0049] Step S12: On the lower side of the reference area, determine the target liquid level parameters of the crystallizer after it enters the final stage during the current casting process;

[0050] Step S13: In response to the trigger signal indicating that the current casting process has entered the final stage, the liquid level parameter of the crystallizer is changed from the set liquid level parameter to the target liquid level parameter, so that the crystallizer completes the final stage of the current casting process in the state corresponding to the target liquid level parameter.

[0051] Regarding step S11, the reference area for the target slag line crack in the crystallizer is determined based on the set liquid level parameters corresponding to the current casting process and the actual state of the crystallizer.

[0052] Typically, the working liquid level in the crystallizer containing molten steel is approximately 72%-80% of the depth of the crystallizer's detectable liquid level range. For example, if the crystallizer's detectable liquid level depth is 185mm, then the working liquid level height range is 133.2mm-148mm. The set liquid level parameter in step S11 is selected from this 72%-80% range.

[0053] By setting different liquid level parameters in the crystallizer for molten steel during adjacent castings, the service life of the crystallizer can be effectively extended. The principle is that this avoids repeated solidification of molten steel at the same height position in the crystallizer, thus reducing damage caused by solidification at the same location. For example, the set liquid level parameters for the crystallizer during adjacent castings can be 72%, 75%, 78%, and 80%, respectively. That is, the set liquid level parameter for the first casting is 72%, 75%, 78%, and 80%.

[0054] It is important to note that although there are set liquid level parameters for each casting pass, the molten steel will fluctuate within a certain range during actual operation, such as ±3%. Therefore, the actual liquid level range for each casting pass may be within ±3% of the set liquid level parameter. For example, when the set liquid level parameter is 72%, the corresponding actual liquid level range may be 72% ±3%, i.e., 69%-75%; similarly, when the set liquid level parameter is 75%, the corresponding actual liquid level range may be 75% ±3%, i.e., 72%-78%. In other words, the actual liquid level range of the molten steel in the crystallizer during the current casting pass can be determined based on the set liquid level parameters corresponding to the current casting pass and the fluctuation range of the molten steel when it is poured into the crystallizer.

[0055] During each casting process, cracks typically form at the slag line in the crystallizer. After each casting cycle, these cracks are repaired. It's possible that all cracks are repaired, or only some. Unrepaired cracks may affect the next casting cycle. To comprehensively consider the impact of new cracks generated in the current casting cycle and old cracks remaining from the previous cycle on continuous casting, this embodiment provides the following optimization scheme, including steps S111-S113.

[0056] Step S111: Before the current casting process begins, determine whether there are any unrepaired old slag line cracks in the crystallizer.

[0057] Step S112: If there are no unrepaired old slag line cracks in the crystallizer, determine the new slag line cracks generated in the crystallizer during the current casting process and their location based on the set liquid level parameters corresponding to the current casting process. The new slag line cracks are taken as target slag line cracks, and the area where the new slag line cracks are located is determined as the reference area.

[0058] Step S113: If there are old slag line cracks in the crystallizer that have not been successfully repaired, then after the current casting process begins, the new slag line cracks generated in the crystallizer during the current casting process and their location are determined according to the set liquid level parameters corresponding to the current casting process.

[0059] Based on the actual condition of the crystallizer before the start of the current casting, identify the old slag line cracks in the crystallizer that were not successfully repaired and their locations.

[0060] Based on the relative elevations of the new and old slag line cracks, the target slag line crack is identified from the new and old slag line cracks, and the area where the target slag line crack is located is used as a reference area.

[0061] Regarding step S111, before the current casting process begins, image processing technology can be used to determine whether there are unrepaired old slag line cracks in the crystallizer. If there are no unrepaired old slag line cracks in the crystallizer, step S112 is executed; otherwise, step S113 is executed.

[0062] Regarding step S112, if there are no unrepaired old slag line cracks in the crystallizer, then only new slag line cracks generated during the current casting process will affect continuous casting. Therefore, the location of the new slag line cracks can be determined based on the set liquid level parameters corresponding to the current casting process. Typically, new slag line cracks will occur within the actual liquid level range, which can be determined based on the set liquid level parameters. This allows for the estimation of the location of the new slag line cracks, which are then identified as target slag line cracks, and step S12 continues. In other words, based on the set liquid level parameters corresponding to the current casting process and the fluctuation range of molten steel when it is added to the crystallizer, the actual liquid level range is determined. Then, based on the actual liquid level range, the new slag line cracks generated in the crystallizer during the current casting process and their location are determined.

[0063] Based on accumulated production data, it has been found that the vertical height of slag line cracks in the crystallizer is typically 2-3 mm, and the cracks are located in the middle of the slag line. If the actual liquid level range is 69%-75%, then the slag line cracks are usually located in the 70%-74% range. Therefore, the area where new slag line cracks are located can be the entire area within the actual liquid level range, or a portion thereof, depending on the actual situation. For example, when the crystallizer is relatively new, its damaged area may be smaller, so only a portion of the actual liquid level range can be considered as the location of new slag line cracks. This ensures a higher molten steel level in subsequent steps and lays a good foundation for reducing the probability of molten steel penetrating into the cracks in subsequent steps. When the crystallizer is older, its damaged area may be larger, so the entire area within the actual liquid level range can be considered as the location of new slag line cracks. This also better lays a good foundation for reducing the probability of molten steel penetrating into the cracks in subsequent steps. A higher liquid level in the crystallizer can improve continuous casting efficiency to a certain extent.

[0064] Regarding step S113, if there are old slag line cracks in the crystallizer that have not been successfully repaired, then the new slag line cracks generated in the crystallizer during the current casting process and their location can be determined according to the set liquid level parameters corresponding to the current casting process. This method is similar to step S112 and will not be described again here.

[0065] The location of the old slag line crack in the crystallizer can be determined based on the actual condition of the crystallizer. This can be achieved using image processing technology or other methods.

[0066] Compare the positions of the new slag line crack and the old slag line crack, and select the slag line crack with the lower position as the target slag line crack to continue to step S12.

[0067] Regarding step S12, on the lower side of the reference area, determine the target liquid level parameters of the crystallizer after it enters the final stage during the current casting process.

[0068] Normally, during the final stage, due to the low pulling speed, the condensation hardness of the protrusions is high, which can scratch the inner wall of the crystallizer. Therefore, in this embodiment, the liquid level parameters are adjusted during the final stage to prevent molten steel from seeping into the slag line cracks of the crystallizer. Specifically, this can be implemented according to steps S121-S122.

[0069] Step S121: Determine the minimum liquid level parameter of molten steel when filling the crystallizer, based on the set liquid level parameter corresponding to the current casting process and the fluctuation range of molten steel when filling the crystallizer.

[0070] Step S122: Based on the safety liquid level adjustment parameters during production and the minimum liquid level parameters of molten steel when the crystallizer is filled with molten steel, determine the target liquid level parameters of the crystallizer after entering the final stage of the current casting process on the lower side of the reference area.

[0071] Regarding step S121, based on the set liquid level parameters corresponding to the current casting process and the fluctuation range of the molten steel when it is poured into the crystallizer, the actual liquid level range of the crystallizer can be determined. The minimum liquid level parameter of the molten steel can then be determined based on the actual liquid level range. For example, if the set liquid level parameter is 72% and the fluctuation range is ±3%, the corresponding actual liquid level range is 69%-75%, then 69% is the current minimum liquid level parameter.

[0072] Regarding step S122, the safety level adjustment parameter can be determined based on actual production conditions. Taking into account both the safety level adjustment parameter and the minimum level parameter, the target level parameter can be determined. For example, if the safety level adjustment parameter is 4% and the minimum level parameter is 69%, then the difference between the safety level adjustment parameter and the minimum level parameter is 65%, and therefore the target level parameter is 65%.

[0073] It is important to note that the safety level adjustment parameter should not be too high. An excessively high safety level adjustment parameter may result in the final target level being too low, potentially leading to safety accidents during continuous casting. Conversely, the safety level adjustment parameter should not be too low. An excessively low safety level adjustment parameter may result in the final target level being too high, thus failing to effectively reduce the likelihood of molten steel seeping into the slag line cracks.

[0074] After determining the target liquid level parameters, proceed to step S13.

[0075] Regarding step S13, in response to the trigger signal indicating that the current casting process has entered the final stage, the liquid level parameter of the crystallizer is changed from the set liquid level parameter to the target liquid level parameter, so that the crystallizer completes the final stage of the current casting process while in the state corresponding to the target liquid level parameter.

[0076] The trigger signal for entering the final stage of the current casting process can be a signal generated after relevant personnel press the button, or a signal that detects whether fresh molten steel flows into the crystallizer within a preset time. The specific signal can be selected according to the actual situation.

[0077] When a trigger signal is detected, it signifies that the current casting process has entered the final stage. At this point, the continuous casting level in the crystallizer is adjusted, meaning the set level parameter is changed to a target level parameter. The target level parameter is lower than the set level parameter, or in other words, lower than the lowest level parameter within the actual level range. Essentially, this ensures that the molten steel level in the final stage is below the target slag line crack, thereby reducing the probability of molten steel entering the slag line crack and thus reducing the likelihood of protrusion formation. This reduces the likelihood of protrusions scratching the crystallizer during their descent. In a preferred embodiment, the solution provided in this embodiment ensures that the molten steel level in the final stage is below the target slag line crack, thereby preventing molten steel from entering the slag line crack and thus preventing the formation of protrusions, which in turn prevent scratching the crystallizer during their descent.

[0078] Step S14 can be executed simultaneously with or within a preset time after step S13:

[0079] Step S14: In response to the trigger signal indicating that the current casting process has entered the final stage, the cooling intensity of the crystallizer is increased, specifically, the cooling intensity of the crystallizer can be controlled to be increased to the maximum value.

[0080] The working surface of the crystallizer in contact with molten steel is made of copper plate. During the production process, the hardness of the copper plate decreases after contact with the molten steel. In this embodiment, by increasing the cooling intensity of the crystallizer, the heat dissipation of the copper plate can be accelerated, thereby increasing the hardness of the copper plate and improving the crystallizer's resistance to scratches, thus protecting the crystallizer and extending its service life. In a preferred scenario, the cooling intensity of the crystallizer can be increased to its maximum value (e.g., 6800 L / min), allowing the crystallizer to dissipate heat at the fastest speed. This not only accelerates the increase in the hardness of the crystallizer but also speeds up the continuous casting process and improves continuous casting efficiency.

[0081] This embodiment first reduces the liquid level of molten steel in the crystallizer during the final stage, thereby reducing the probability of molten steel seeping into the slag line cracks in the crystallizer, which in turn reduces the probability of forming protrusions and the probability of the copper plate of the crystallizer being scratched. At the same time, it accelerates the heat dissipation of the crystallizer, increases the hardness of the crystallizer, further improves the scratch resistance of the copper plate of the crystallizer, and extends the service life of the crystallizer.

[0082] Under normal circumstances, the final stage lasts about one minute. The impact of completing the final work with the target liquid level parameter on production safety is small and can be ignored.

[0083] After the current casting process is completed in the crystallizer, the slag line cracks in the crystallizer can be repaired, and the next casting process can be started after the repair. The next casting process can be used as the new current casting process and steps S11-S14 can be repeated to reduce scratches on the crystallizer.

[0084] In summary, this embodiment utilizes the adjustable liquid level of the casting machine's crystallizer to rationally adjust the crystallizer level. This ensures that the solidification front of the billet during the final stage avoids the slag line position in the casting process, while simultaneously increasing the cooling intensity of the crystallizer and reducing the overall hot surface temperature of the copper plate. This dual protection avoids scratches on the copper plate caused by irregular tail billets. In other words, this embodiment determines the target liquid level parameter for the final stage based on the location of the target slag line crack. After entering the final stage of the current casting process, the set liquid level parameter is changed to the target liquid level parameter, ensuring that the crystallizer completes the final stage of the current casting process at the state corresponding to the target liquid level parameter. The target liquid level parameter is lower than the set liquid level parameter, or in other words, lower than the lowest liquid level parameter within the actual liquid level range. Essentially, this ensures that the molten steel level in the final stage is below the target slag line crack, thereby reducing the probability of molten steel entering the slag line crack and thus reducing the probability of protrusion formation, which in turn reduces scratches on the crystallizer during the downward movement of the protrusion. In a preferred embodiment, the solution provided in this embodiment can keep the molten steel level below the target slag line crack during the final stage, thereby preventing the molten steel from entering the slag line crack and thus preventing the formation of a protrusion, which would cause scratches to the crystallizer during the downward movement of the protrusion.

[0085] In addition, because the solution provided in this embodiment can reduce the probability of molten steel entering cracks during the final stage, it can further reduce the probability of cracks becoming larger and deeper due to molten steel entering cracks, thus further extending the online turnover life of the crystallizer.

[0086] Based on the same inventive concept, this embodiment provides as follows: Figure 2 The slab continuous casting control device shown includes:

[0087] The reference area determination module 21 is used to determine the reference area of ​​the target slag line crack in the crystallizer based on the set liquid level parameters corresponding to the current casting process and the actual state of the crystallizer.

[0088] The target liquid level parameter determination module 22 is used to determine the target liquid level parameter of the crystallizer after it enters the final stage in the current casting process, on the lower side of the reference area.

[0089] The adjustment module 23 is used to respond to the trigger signal that the current casting process has entered the final stage, and control the liquid level parameter of the crystallizer to change from the set liquid level parameter to the target liquid level parameter, so that the crystallizer completes the final stage of the current casting process in the state corresponding to the target liquid level parameter.

[0090] Furthermore, adjustment module 23 is also used for:

[0091] In response to a trigger signal indicating that the current casting process has entered the final stage, the cooling intensity of the crystallizer is increased, specifically to control the cooling intensity of the crystallizer to be increased to its maximum value.

[0092] Furthermore, the reference area determination module 21 includes:

[0093] The new slag line crack determination submodule is used to determine the new slag line cracks generated in the crystallizer and their location during the current casting process based on the set liquid level parameters corresponding to the current casting process.

[0094] The old slag line crack determination submodule is used to determine whether there are unrepaired old slag line cracks in the crystallizer and their location based on the actual state of the crystallizer before the start of the current casting.

[0095] The reference area determination submodule is used to determine the target slag line crack from the new slag line crack and the old slag line crack based on the location elevation of the areas where the target slag line crack is located, and to use the area where the target slag line crack is located as the reference area.

[0096] Furthermore, the new slag line crack determination submodule is specifically used for:

[0097] Based on the set liquid level parameters corresponding to the current casting process and the fluctuation range of molten steel when the crystallizer is filled with molten steel, determine the new slag line cracks generated in the crystallizer during the current casting process and their location.

[0098] Furthermore, the target liquid level parameter determination module 22 includes:

[0099] The minimum liquid level parameter determination submodule is used to determine the minimum liquid level parameter of molten steel when filling the crystallizer, based on the set liquid level parameter corresponding to the current casting process and the fluctuation range of molten steel when filling the crystallizer.

[0100] The target liquid level parameter determination submodule is used to determine the target liquid level parameter of the crystallizer after it enters the final stage of the current casting process, based on the corresponding safe liquid level adjustment parameter during production and the minimum liquid level parameter of the molten steel when the crystallizer is filled with molten steel, on the lower side of the reference area.

[0101] Furthermore, the device also includes a repair module for repairing slag line cracks in the crystallizer after the crystallizer has completed the final stage of the current casting process, and then proceeding to the next casting process after repair.

[0102] Based on the same inventive concept, this embodiment provides as follows: Figure 3 An electronic device shown includes:

[0103] Processor 31;

[0104] Memory 32 is used to store executable instructions of processor 31;

[0105] The processor 31 is configured to execute a slab continuous casting control method as described above.

[0106] Based on the same inventive concept, this embodiment provides a non-transitory computer-readable storage medium that, when the instructions in the storage medium are executed by the processor 31 of an electronic device, enables the electronic device to implement a slab continuous casting control method as described above.

[0107] Since the electronic device described in this embodiment is an electronic device used to implement the information processing method in the embodiments of this application, those skilled in the art can understand the specific implementation methods and various variations of the electronic device in this embodiment based on the information processing method described in the embodiments of this application. Therefore, how the electronic device implements the method in the embodiments of this application will not be described in detail here. Any electronic device used by those skilled in the art to implement the information processing method in the embodiments of this application falls within the scope of protection of this application.

[0108] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0109] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. 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 processor, 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, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0110] 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 1One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0111] 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.

[0112] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0113] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for controlling slab continuous casting, characterized in that, The method includes: Based on the set liquid level parameters corresponding to the current casting process and the actual state of the crystallizer, the reference area of ​​the target slag line crack in the crystallizer is determined; Below the reference area, determine the target liquid level parameters of the crystallizer after it enters the final stage during the current casting process; In response to a trigger signal indicating that the current casting process has entered the final stage, the liquid level parameter of the crystallizer is controlled to be changed from the set liquid level parameter to the target liquid level parameter, so that the crystallizer completes the final stage of the current casting process while in the state corresponding to the target liquid level parameter. In response to a trigger signal indicating that the current casting process has entered the final stage, the cooling intensity of the crystallizer is increased; the increase in the cooling intensity of the crystallizer includes: controlling the cooling intensity of the crystallizer to increase to a maximum value; The step of determining the reference region for the target slag line crack within the crystallizer based on the set liquid level parameters corresponding to the current casting process and the actual state of the crystallizer includes: Based on the set liquid level parameters corresponding to the current casting process, determine the new slag line cracks generated in the crystallizer during the current casting process and their location. Based on the actual condition of the crystallizer before the start of the current casting, determine whether the crystallizer has unrepaired old slag line cracks and their location. Based on the relative elevations of the locations of the new slag line cracks and the old slag line cracks, the target slag line crack is determined from the new slag line cracks and the old slag line cracks, and the area where the target slag line crack is located is used as the reference area.

2. The method as described in claim 1, characterized in that, The step of determining the new slag line cracks and their location in the crystallizer during the current casting process, based on the set liquid level parameters corresponding to the current casting process, includes: Based on the set liquid level parameters corresponding to the current casting process and the fluctuation range of molten steel when the crystallizer is filled with molten steel, the new slag line cracks generated in the crystallizer during the current casting process and their location are determined.

3. The method as described in claim 1, characterized in that, Determining the target liquid level parameters of the crystallizer after it enters the final stage of the current casting process, located below the reference area, includes: Based on the set liquid level parameters corresponding to the current casting process and the fluctuation range of molten steel when the crystallizer is filled with molten steel, determine the minimum liquid level parameters of molten steel when the crystallizer is filled with molten steel. Based on the safety liquid level adjustment parameters during production and the minimum liquid level parameters of molten steel when the crystallizer is filled with molten steel, the target liquid level parameters of the crystallizer after entering the final stage in the current casting process are determined on the lower side of the reference area.

4. The method as described in claim 1, characterized in that, After the crystallizer completes the final stage of the current casting process, the method further includes: The slag line cracks in the crystallizer are repaired, and the next casting process begins after the repair.

5. A slab continuous casting control device, characterized in that, The apparatus for implementing a slab continuous casting control method as described in any one of claims 1 to 4 comprises: The reference area determination module is used to determine the reference area of ​​the target slag line crack in the crystallizer based on the set liquid level parameters corresponding to the current casting process and the actual state of the crystallizer. The target liquid level parameter determination module is used to determine the target liquid level parameter of the crystallizer after it enters the final stage in the current casting process, on the lower side of the reference area. The adjustment module is used to respond to the trigger signal that the current casting process has entered the final stage, and control the liquid level parameter of the crystallizer to change from the set liquid level parameter to the target liquid level parameter, so that the crystallizer completes the final stage of the current casting process in the state corresponding to the target liquid level parameter.

6. An electronic device, characterized in that, include: processor; Memory used to store the processor's executable instructions; The processor is configured to execute a slab continuous casting control method as described in any one of claims 1 to 4.

7. A non-transitory computer-readable storage medium, wherein when instructions in the storage medium are executed by a processor of an electronic device, the electronic device is able to perform a slab continuous casting control method as described in any one of claims 1 to 4.

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