Safe production methods and equipment for casting billets

Abstract

This application provides a safe production method and apparatus for cast billets, relating to the field of metallurgical technology. The method includes: before performing online fine-tuning of the crystallizer, determining the target thickness of the liquid slag in the crystallizer based on the amplitude of the crystallizer; the liquid slag is used to protect the initial shell of the cast billet during the online fine-tuning operation; the target thickness is greater than the initial thickness of the liquid slag; after performing the online fine-tuning operation, determining the running length of the starting point of the cast billet based on the effective length of the crystallizer and a preset safety factor; and producing the cast billet based on the running length. The safe production method and apparatus for cast billets provided by this application can ensure the safety of the cast billet production process and improve the production quality of the cast billets.

Description

Technical Field

[0001] This application relates to the field of metallurgical technology, and in particular to a safe production method and apparatus for casting billets. Background Technology

[0002] In continuous steel casting, different steel grades are poured consecutively. Due to differences in the shrinkage coefficient of the steel grades, the actual width of the produced billet may slightly differ from the planned width. To address this discrepancy, online fine-tuning of the mold's width can be performed. However, this online fine-tuning can easily lead to steel clamping at the mold's corner seams. The corner seam is the gap between the narrow and large copper plates of the mold. If this clamped steel adheres to the initial billet shell, it can cause the casting machine to stick, trigger alarms and shut down, and even result in steel leakage. If corner seam clamping is not detected in time, it can cause severe scratches on the corners of the billet, resulting in quality defects. In other words, online fine-tuning of the mold's width is prone to corner seam clamping, which can lead to accidents during the billet production process and quality defects in the billet. Summary of the Invention

[0003] This application provides a safe production method and apparatus for billets, which solves the problems of accidents and quality defects in the billet production process caused by the online fine-tuning operation of the crystallizer in the prior art, and realizes safe and high-quality production of billets.

[0004] In a first aspect, this application provides a safe production method for casting billets, comprising:

[0005] Before performing online fine-tuning of the crystallizer, the target thickness of the liquid slag in the crystallizer is determined based on the amplitude of the crystallizer; the liquid slag is used to protect the initial shell of the billet during the online fine-tuning of the crystallizer; the target thickness is greater than the initial thickness of the liquid slag.

[0006] After performing the online fine-tuning of the crystallizer, the running length of the starting point of the billet is determined based on the effective length of the crystallizer and the preset safety factor.

[0007] The billet is produced based on the stated running length.

[0008] Optionally, determining the running length of the starting point of the billet based on the effective length of the crystallizer and a preset safety factor includes:

[0009] Multiply the effective length by the preset safety factor to obtain the first threshold;

[0010] The running length is determined based on the first threshold.

[0011] Optionally, the running length is greater than the first threshold.

[0012] Optionally, the preset safety factor is greater than 1.

[0013] Optionally, determining the target thickness of the liquid slag in the crystallizer based on the amplitude of the crystallizer includes:

[0014] Use twice the amplitude as the second threshold;

[0015] The target thickness is determined based on the second threshold.

[0016] Optionally, the target thickness is greater than the second threshold.

[0017] Secondly, this application also provides a safety production device for casting billets, comprising:

[0018] The first determining module is used to determine the target thickness of the liquid slag in the crystallizer based on the amplitude of the crystallizer before performing the online fine-tuning operation of the crystallizer; the liquid slag is used to protect the initial shell of the billet during the online fine-tuning operation of the crystallizer; the target thickness is greater than the initial thickness of the liquid slag;

[0019] The second determining module is used to determine the running length of the starting point of the billet based on the effective length of the crystallizer and a preset safety factor after the online fine-tuning operation of the crystallizer is performed.

[0020] The production module is used to produce the billet based on the running length.

[0021] Optionally, the second determining module is specifically used for:

[0022] Multiply the effective length by the preset safety factor to obtain the first threshold;

[0023] The running length is determined based on the first threshold.

[0024] Optionally, the running length is greater than the first threshold.

[0025] Optionally, the preset safety factor is greater than 1.

[0026] Optionally, the first determining module is specifically used for:

[0027] Use twice the amplitude as the second threshold;

[0028] The target thickness is determined based on the second threshold.

[0029] Optionally, the target thickness is greater than the second threshold.

[0030] Thirdly, this application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method described in the first aspect.

[0031] Fourthly, this application also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method described in the first aspect.

[0032] Fifthly, this application also provides a computer program product, including a computer program that, when executed by a processor, implements the method described in the first aspect.

[0033] The safe production method and apparatus for casting billets provided in this application can reduce the probability of initial billet shell cracking and the probability of steel sandwiched in the corner seam of the crystallizer by determining the target thickness of the liquid slag and the running length of the billet starting point, thereby improving the quality of the billet, reducing the probability of production accidents, ensuring the safety of the billet production process, and meeting the long-term, efficient and high-quality production requirements of the continuous casting process under high frequency width adjustment. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic flowchart of the safe production method for cast billets provided in the embodiments of this application;

[0036] Figure 2 This is one of the structural schematic diagrams of the crystallizer provided in the embodiments of this application;

[0037] Figure 3 This is a second schematic diagram of the crystallizer provided in the embodiments of this application;

[0038] Figure 4 This is a schematic diagram of the structure of the safe production device for casting billets provided in the embodiments of this application;

[0039] Figure 5 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] Figure 1 This is a schematic flowchart of the safe production method for casting billets provided in the embodiments of this application. (Refer to...) Figure 1 This application provides a method for safe production of cast billets, the execution subject of which can be an electronic device, such as a controller. The following description uses a controller as an example of how this method can be executed. The method may include:

[0042] Step 110: Before performing online fine-tuning of the crystallizer, determine the target thickness of the liquid slag in the crystallizer based on the amplitude of the crystallizer; the liquid slag is used to protect the initial shell of the billet during the online fine-tuning of the crystallizer; the target thickness is greater than the initial thickness of the liquid slag.

[0043] Step 120: After performing online fine-tuning of the crystallizer, determine the running length of the starting point of the billet based on the effective length of the crystallizer and the preset safety factor;

[0044] Step 130: Produce the billet based on the running length.

[0045] Figure 2 This is one of the structural schematic diagrams of the crystallizer provided in the embodiments of this application. For example... Figure 2 As shown, during the production of cast billets, when performing online micro-width adjustment in the crystallizer, the clamping surface (large surface) needs to be loosened to allow the width adjustment surface (narrow surface) to move according to the width adjustment requirements. Specifically, the clamping surface opens rapidly by overcoming the pressure of the disc springs using a hydraulic system. At the moment the clamping surface is loosened, the primary billet shell inside the crystallizer suddenly loses its support, and the static pressure of the molten steel causes the primary billet shell to crack, resulting in molten steel overflowing from the primary billet shell. At this time, the clamping surface is in an open state, and the corner gap between the large and narrow surfaces is clearly visible. The suddenly overflowing molten steel can easily rush into the corner gap and solidify. Because the width adjustment amount in the online micro-width adjustment operation of the crystallizer is very small, generally not exceeding 15mm on one side, the running length of the starting point of the cast billet after width adjustment is also short, generally not exceeding 500mm before the task is completed. Then the clamping surface of the crystallizer tightens, which causes the molten steel that overflowed from the primary billet shell and rushed into the corner gap of the crystallizer and solidified to be trapped in the corner gap of the crystallizer, forming a corner gap steel trap in the crystallizer. Based on this, this application proposes a new method for safe production of cast billets.

[0046] In step 110, the molten steel cools in the crystallizer to form the initial shell of the cast billet. Before performing online micro-width adjustment in the crystallizer, the controller can determine the target thickness of the liquid slag in the crystallizer based on the crystallizer's amplitude. The liquid slag is used to protect the initial shell of the cast billet during the online micro-width adjustment operation. The target thickness is greater than the initial thickness of the liquid slag. Figure 3 This is the second schematic diagram of the crystallizer provided in the embodiments of this application. The crystallizer already contains liquid slag; the thickness of the liquid slag before adjustment is the initial thickness. After determining the target thickness of the liquid slag, the liquid slag in the crystallizer can be adjusted to the determined target thickness. Specifically, the liquid slag can be directly increased to the target thickness; alternatively, the solid slag in the crystallizer can be removed first, and then the liquid slag can be increased to the target thickness. During the online fine-tuning of the crystallizer's width, the sufficient inflow of the liquid slag protective slag at the meniscus of the crystallizer will buffer the nascent billet shell at the moment of loosening of the clamping surface, reducing its degree and probability of breakage.

[0047] In step 120, after performing online fine-tuning of the crystallizer, the controller can determine the running length of the billet's starting point based on the effective length of the crystallizer and a preset safety factor. Specifically, appropriately increasing the running length of the billet's starting point can reduce the probability of steel sandwiching at corner seams.

[0048] In step 130, the controller can control the production of the billet according to the running length of the billet starting point.

[0049] The safe production method for casting billets provided in this application reduces the probability of initial billet shell cracking and the probability of steel sandwiched in the corner seam of the crystallizer by determining the target thickness of the liquid slag and the running length of the billet starting point. This improves the quality of the billet, reduces the probability of production accidents, ensures the safety of the billet production process, and meets the long-term, efficient, and high-quality production requirements of continuous casting process under high-frequency width adjustment.

[0050] In one embodiment, determining the running length of the billet starting point based on the effective length of the crystallizer and a preset safety factor includes: multiplying the effective length by the preset safety factor to obtain a first threshold; and determining the running length based on the first threshold.

[0051] Furthermore, in one embodiment, the running length is greater than a first threshold.

[0052] Furthermore, in one embodiment, the preset safety factor is greater than 1.

[0053] Specifically, the preset safety factor can be set to 1.5. The controller multiplies the effective length of the crystallizer by the preset safety factor to obtain the first threshold, and the running length of the starting point of the billet is greater than the first threshold.

[0054] The safe production method for cast billets provided in this application provides a first threshold by multiplying the effective length by a preset safety factor. By setting the running length of the starting point of the cast billet to be greater than the first threshold, an appropriate running length can be ensured. This avoids the defect that the running length of the starting point of the cast billet is too short to exit the bottom of the crystallizer, reduces the occurrence of steel clamping at the corner seam of the crystallizer, ensures the safety of the cast billet production process, and improves the production quality of the cast billet.

[0055] In one embodiment, determining the target thickness of the liquid slag in the crystallizer based on the amplitude of the crystallizer includes: using twice the amplitude as a second threshold; and determining the target thickness based on the second threshold.

[0056] Furthermore, in one embodiment, the target thickness is greater than a second threshold.

[0057] The controller can determine the target thickness of the liquid slag in the crystallizer based on the amplitude of the crystallizer. For example, twice the amplitude can be used as a second threshold to make the target thickness greater than the second threshold.

[0058] The safe production method for casting billets provided in this application determines the target thickness of the liquid slag in the crystallizer by measuring the amplitude of the crystallizer. This buffers the initial billet shell at the moment the clamping surface of the crystallizer is loosened, reducing the degree and probability of initial billet shell cracking, reducing the probability of steel being trapped in the corner seam of the crystallizer, improving the quality of the casting billet, reducing the probability of production accidents, and ensuring the safety of the casting billet production process.

[0059] The following describes the safety production device for cast billets provided in this application. The safety production device for cast billets described below can be referred to in correspondence with the safety production method for cast billets described above.

[0060] Figure 4 This is a schematic diagram of the safety production device for casting billets provided in an embodiment of this application. (Refer to...) Figure 4 The safety production device for casting billets provided in this application embodiment may include:

[0061] The first determining module 410 is used to determine the target thickness of the liquid slag in the crystallizer based on the amplitude of the crystallizer before performing the online fine-tuning operation of the crystallizer; the liquid slag is used to protect the initial shell of the billet during the online fine-tuning operation of the crystallizer; the target thickness is greater than the initial thickness of the liquid slag;

[0062] The second determining module 420 is used to determine the running length of the starting point of the billet based on the effective length of the crystallizer and a preset safety factor after the online fine-tuning operation of the crystallizer is performed.

[0063] Production module 430 is used to produce the billet based on the running length.

[0064] The safety production device for cast billets provided in this application embodiment can reduce the probability of initial billet shell cracking and the probability of steel sandwiched in the corner seam of the crystallizer by determining the target thickness of the liquid slag and the running length of the starting point of the cast billet, thereby improving the quality of the cast billet, reducing the probability of production accidents, ensuring the safety of the cast billet production process, and meeting the long-term, efficient and high-quality production requirements of the continuous casting process under high frequency width adjustment.

[0065] In one embodiment, the second determining module is specifically used for:

[0066] Multiply the effective length by the preset safety factor to obtain the first threshold;

[0067] The running length is determined based on the first threshold.

[0068] In one embodiment, the running length is greater than the first threshold.

[0069] In one embodiment, the preset safety factor is greater than 1.

[0070] In one embodiment, the first determining module is specifically used for:

[0071] Use twice the amplitude as the second threshold;

[0072] The target thickness is determined based on the second threshold.

[0073] In one embodiment, the target thickness is greater than the second threshold.

[0074] Specifically, the safety production device for casting billets provided in this application embodiment can realize all the method steps implemented by the method embodiment with the controller as the execution subject, and can achieve the same technical effect. Here, the parts that are the same as those in the method embodiment and the beneficial effects will not be described in detail.

[0075] Figure 5 This is a schematic diagram of the structure of the electronic device provided in an embodiment of this application. For example... Figure 5 As shown, the electronic device may include: a processor 510, a communications interface 520, a memory 530, and a communication bus 540, wherein the processor 510, the communications interface 520, and the memory 530 communicate with each other via the communication bus 540. The processor 510 can call logical instructions in the memory 530 to execute safe production methods for the casting billet, such as:

[0076] Before performing online fine-tuning of the crystallizer, the target thickness of the liquid slag in the crystallizer is determined based on the amplitude of the crystallizer; the liquid slag is used to protect the initial shell of the billet during the online fine-tuning of the crystallizer; the target thickness is greater than the initial thickness of the liquid slag.

[0077] After performing the online fine-tuning of the crystallizer, the running length of the starting point of the billet is determined based on the effective length of the crystallizer and the preset safety factor.

[0078] The billet is produced based on the stated running length.

[0079] Furthermore, the logical instructions in the aforementioned memory 530 can be implemented as software functional units and, when sold or used as independent products, 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 a portion 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 described in 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.

[0080] On the other hand, this application also provides a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the safe production method for casting billets provided by the above methods, including, for example:

[0081] Before performing online fine-tuning of the crystallizer, the target thickness of the liquid slag in the crystallizer is determined based on the amplitude of the crystallizer; the liquid slag is used to protect the initial shell of the billet during the online fine-tuning of the crystallizer; the target thickness is greater than the initial thickness of the liquid slag.

[0082] After performing the online fine-tuning of the crystallizer, the running length of the starting point of the billet is determined based on the effective length of the crystallizer and the preset safety factor.

[0083] The billet is produced based on the stated running length.

[0084] Furthermore, this application also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer is able to perform the steps of the safe production method for casting billets provided by the above methods, such as including:

[0085] Before performing online fine-tuning of the crystallizer, the target thickness of the liquid slag in the crystallizer is determined based on the amplitude of the crystallizer; the liquid slag is used to protect the initial shell of the billet during the online fine-tuning of the crystallizer; the target thickness is greater than the initial thickness of the liquid slag.

[0086] After performing the online fine-tuning of the crystallizer, the running length of the starting point of the billet is determined based on the effective length of the crystallizer and the preset safety factor.

[0087] The billet is produced based on the stated running length.

[0088] The device embodiments described above are merely illustrative. 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 modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0089] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0090] It should also be noted that the terms "first," "second," etc., used in the embodiments of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, and the number of objects is not limited. For example, the first object can be one or more.

[0091] In the embodiments of this application, the term "and / or" describes the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

[0092] In this application's embodiments, "determine B based on A" means that factor A must be considered when determining B. It is not limited to "B can be determined based solely on A," but should also include: "determine B based on A and C," "determine B based on A, C, and E," "determine C based on A, and further determine B based on C," etc. Additionally, it can include using A as a condition for determining B, for example, "when A meets the first condition, determine B using the first method"; another example, "when A meets the second condition, determine B," etc.; another example, "when A meets the third condition, determine B based on the first parameter," etc. Of course, it can also be a condition where A is a factor in determining B, for example, "when A meets the first condition, determine C using the first method, and further determine B based on C," etc.

[0093] In the embodiments of this application, the term "multiple" refers to two or more, and other quantifiers are similar.

[0094] Finally, it should be noted that 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 of safe production of a cast slab, characterized by, The method comprises the following steps: determining a target thickness of a liquid slag of a crystallizer based on an amplitude of the crystallizer before an online width-adjusting operation of the crystallizer is performed; the liquid slag is used to protect a primary shell of a cast blank when the online width-adjusting operation of the crystallizer is performed; the target thickness is greater than an initial thickness of the liquid slag; determining a running length of a starting point of the cast blank based on an effective length of the crystallizer and a preset safety coefficient after the online width-adjusting operation of the crystallizer is performed; producing the cast blank based on the running length; the determining of the running length of the starting point of the cast blank based on the effective length of the crystallizer and the preset safety coefficient comprises: multiplying the effective length by the preset safety coefficient to obtain a first threshold value; determining the running length based on the first threshold value; the running length is greater than the first threshold value; the preset safety coefficient is greater than 1; the determining of the target thickness of the liquid slag of the crystallizer based on the amplitude of the crystallizer comprises: taking twice the amplitude as a second threshold value; determining the target thickness based on the second threshold value; the target thickness is greater than the second threshold value.

2. A safety production device for casting billets, characterized in that, The device for realizing the safe production method of the cast blank as claimed in claim 1 comprises: a first determining module for determining a target thickness of a liquid slag of a crystallizer based on an amplitude of the crystallizer before an online width-adjusting operation of the crystallizer is performed; the liquid slag is used to protect a primary shell of a cast blank when the online width-adjusting operation of the crystallizer is performed; and the target thickness is greater than an initial thickness of the liquid slag; a second determining module for determining a running length of a starting point of the cast blank based on an effective length of the crystallizer and a preset safety coefficient after the online width-adjusting operation of the crystallizer is performed; a production module for producing the cast blank based on the running length.

3. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The processor executes the computer program to realize the safe production method of the cast blank as claimed in claim 1.

4. A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to realize the safe production method of the cast blank as claimed in claim 1.

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