Casting speed control and secondary treatment system for continuous casting machine

Abstract

The present application relates to a kind of continuous casting machine speed control and secondary processing system, the system includes steelmaking production plan control system (L3), continuous casting machine process control system (continuous casting L2), continuous casting machine basic automation system and continuous casting slab finishing control system, wherein steelmaking production plan control system (L3) is connected by continuous casting machine process control system (continuous casting L2) continuous casting machine basic automation system and continuous casting slab finishing control system.Wherein steelmaking production plan control system calculates the target casting speed of continuous casting production plan according to the production status of steelmaking production whole process, and issues to continuous casting machine process control system (continuous casting L2);Through the system, realize the whole process automatic control of continuous casting machine speed, eliminate artificial factor, improve the yield of casting blank and casting blank quality, improve the automatic control level of continuous casting machine.

Description

Technical Field

[0001] This invention relates to a continuous casting machine processing system, specifically to a method for controlling the billet casting speed and secondary processing in a continuous casting machine, belonging to the field of continuous casting machine control technology. Background Technology

[0002] During continuous casting production, various operational and abnormal situations, such as steel superheating, billet width adjustment, heat change, steel grade mixing, submerged entry nozzle replacement, and nozzle blockage, necessitate speed control of the continuous casting machine's billet casting speed. Currently, on-site control of the billet casting speed is primarily achieved through manual adjustment by operators based on process cards, heat results, and on-site production conditions. However, differences in individual operation and understanding can lead to instability and delays in manual speed control, affecting the continuous casting production rhythm, causing fluctuations in the molten steel level within the crystallizer, and ultimately impacting the quality of the continuously cast billet.

[0003] Novelty Search Comparison

[0004] A novelty search revealed five related invention patents: a method for controlling the casting speed of continuous casting (CN201810164343.X), an optimization method for the actual casting speed of a slab continuous casting straightening machine (CN201310740520.1), a device and method for detecting the speed of continuous casting slabs (CN201010281751.7), a method for handling slab stagnation in continuous casting (CN201510635362.2), and a method for predicting and controlling steel leakage in continuous casting (CN200710093907.7). Among them, three invention patents—a method for controlling the casting speed in continuous casting (CN201810164343.X), an optimization method for the actual casting speed of a slab continuous casting straightening machine (CN201310740520.1), and a continuous casting slab speed detection device and its detection method (CN201010281751.7)—compare the actual casting speed with the set target speed through equipment and methods, and correct the speed deviation by issuing warnings and correcting acceleration, so that the actual casting speed and the set target casting speed are consistent; and a method for handling slab stagnation in continuous casting (CN2015106) Method 35362.2 addresses the abnormal handling of continuously cast slabs stuck in the runner by manually adjusting parameters such as secondary cooling water volume, different sector lifting, casting pressure, and casting speed on the L1 continuous casting basic automation system after a slab stagnation anomaly occurs in the continuous casting machine. Another method (CN200710093907.7) for predicting and controlling slab leakage in continuous casting only controls the casting speed by reducing it to 0.4 m / min or stopping the casting machine when the leakage prediction system issues an alarm; there is no subsequent control of the casting speed or handling of the anomaly. Therefore, a new solution is urgently needed to address the aforementioned technical problems. Summary of the Invention

[0005] This invention addresses the problems existing in the prior art by providing a continuous casting machine billet speed control and secondary processing system. This technical solution receives the target billet speed value from the L3 steelmaking production planning control system, combines it with operational data and abnormal events during the continuous casting process, calculates the optimal billet speed, and sends it to the L1 continuous casting basic automation system for speed control. Simultaneously, abnormal events during the automatic control of the billet speed are sent to the billet length cutting optimization module in the L2 continuous casting process control system for billet length optimization. The optimized billet length is then sent to the billet quality judgment module for quality assessment, and the quality judgment result is sent to the L1 continuous casting billet finishing module for secondary processing. This achieves fully automatic control of the continuous casting machine billet speed, eliminates human factors, improves billet yield and quality, and enhances the level of automatic control of the continuous casting machine.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: a continuous casting machine billet speed control and secondary processing system, characterized in that the system includes a steelmaking production planning control system (L3), a continuous casting machine process control system (continuous casting L2), a continuous casting machine basic automation system, and a continuous casting slab finishing control system, wherein the steelmaking production planning control system (L3) is connected to the continuous casting machine basic automation system and the continuous casting slab finishing control system through the continuous casting machine process control system (continuous casting L2). The steelmaking production planning control system calculates the target billet pulling speed of the continuous casting production plan based on the production status of the entire steelmaking process and sends it to the continuous casting machine process control system (continuous casting L2). This invention relates to the L3 steelmaking production planning control system sending the target billet pulling speed of continuous casting production, and the L2 continuous casting machine process control system reading the target billet pulling speed. It comprehensively considers operations such as furnace change, tundish change, billet width adjustment, steel grade mixing casting, and submerged entry nozzle change during continuous casting production, as well as abnormal events such as steel superheat, submerged entry nozzle, and continuous casting machine shutdown, and controls the continuous casting billet pulling speed. At the same time, it sends the abnormal events that occur during the change of the continuous casting machine billet pulling speed to the continuous casting length cutting optimization module and the continuous casting billet quality judgment module in the L2 continuous casting machine process control to perform continuous casting billet length optimization cutting and billet quality judgment. The continuous casting billet quality judgment results are then sent to the L1 continuous casting machine billet finishing control system for secondary processing of continuous casting billets with quality defects.

[0007] As an improvement of the present invention, the continuous casting machine process control system includes a continuous casting plan receiving module, a continuous casting billet pulling speed calculation module, a billet cutting length optimization module, and a billet quality judgment module.

[0008] The continuous casting plan receiving module is used to receive the target billet pulling speed for continuous casting production.

[0009] The continuous casting billet speed calculation module calculates the optimal billet pulling speed for the continuous casting machine based on various operations and abnormal events during the continuous casting production process, and sends the calculation results to the continuous casting machine basic automation system (continuous casting L1) to control the continuous casting machine equipment for speed increase and decrease. The billet cutting length optimization module optimizes the billet cutting length for abnormal situations that occur during the continuous casting machine billet pulling control process, improves the continuous casting billet yield, and sends the calculation results to the continuous casting billet quality judgment module. The billet quality judgment module judges the quality of the produced continuous casting billets and sends the results to the continuous casting billet finishing control system (finishing L1). The continuous casting finishing L1 accurately locates the defect area based on the defect level of the abnormal event and the corresponding billet length, and quickly processes it to reduce the impact on the surface quality of good billets. At the same time, it reduces the labor intensity of operators in the continuous casting billet finishing area.

[0010] As an improvement of the present invention, the system processing method includes the following steps: Step 1: The target casting speed of the continuous casting machine is issued.

[0011] The steelmaking production planning and control system (steelmaking L3) calculates the target billet pulling speed V of the continuous casting machine based on the steelmaking production status. AIM And it was issued to the continuous casting process control system (continuous casting L2).

[0012] Step 2: Receive the target billet casting speed of the continuous casting machine.

[0013] The continuous casting machine process control system (continuous casting L2) receives the target billet casting speed from the steelmaking production planning control system (steelmaking L3).

[0014] Step 3: Periodically read the production performance data of the continuous casting machine, and calculate the optimal billet pulling speed V based on the production performance data:

[0015] 1) Is there a heat change? If there is no heat change, proceed to the next step; if there is a heat change, calculate the superheat of the molten steel for the next heat based on the exit temperature of the previous process. Calculate the first continuous casting time Tsh based on the temperature drop rate of the molten steel in the continuous casting process. Calculate the second continuous casting time Tt based on the molten steel flow rate in the continuous casting process and the molten steel flow rate for the next heat. Calculate the minimum billet pulling speed Vmin based on max[Tsh,Tt], compare it with the current actual pulling speed Vcurr, min[Vmin,Vcurr], to obtain the pulling speed V1 for this step, and proceed to the next step.

[0016] 2) Width adjustment: If there is no width adjustment, proceed to the next step; if there is a width adjustment, calculate the billet width adjustment value W, calculate the width adjustment time Twid based on the working speed of the hydraulic cylinder of the width adjustment equipment Vequ, and then calculate the billet pulling speed Vwid based on the continuous casting width adjustment range Ladjust. Compare it with the current actual pulling speed Vcurr, min[Vwid, Vcurr], and obtain the pulling speed V2 for this step, then proceed to the next step.

[0017] 3) Whether mixed casting is used: If there is no mixed casting, proceed to the next step; if there is mixed casting, convert the allowable length Lmix of mixed casting into the steel volume WEIGHT, and then calculate the billet pulling speed Vmix based on the current actual steel volume WEIGHTtr. Compare it with the current actual pulling speed Vcurr, min[Vmix, Vcurr], and obtain the pulling speed V3 of this step, then proceed to the next step.

[0018] 4) Based on the target billet speed received by the continuous casting machine process control system (continuous casting L2), the calculated billet speed is greater than the target billet speed V. AIM Using the calculated casting speed V1 as the optimal casting speed V for the continuous casting machine is both economical and efficient, as well as safe and reliable. However, if the calculated casting speed is less than the target casting speed V... AIM Then the target drawing speed V is adopted. AIM The optimal billet pulling speed V for continuous casting machines;

[0019] Step 4: Issue the throwing speed.

[0020] The optimal billet pulling speed V of the continuous casting machine is sent to the continuous casting basic automation system (continuous casting L1) to control the continuous casting equipment to perform speed control during lifting and lowering; and abnormal data of billet pulling speed changes during lifting and lowering are sent to the continuous casting billet cutting length optimization module (continuous casting L2).

[0021] Step 5: Optimize the cutting length of the continuously cast billet.

[0022] Abnormal changes in the billet drawing speed during the lifting and lowering process of the continuous casting machine can affect the quality of the continuously cast billet. Subsequent processes will cut off this part of the billet. Therefore, based on the casting length corresponding to the abnormal billet drawing speed event, we should first consider the adjacent abnormal events to be in the same area. When cutting the continuously cast billet in this area where quality defects may exist, we should consider cutting at the head, tail, or joint of two continuously cast billets, and avoid cutting in the middle part of the continuously cast billet as much as possible. This will avoid the loss of good billets produced by multiple manual cuttings on the continuous casting line, improve the yield of the continuous casting machine, and reduce the number of continuously cast billets with quality defects.

[0023] Step 6: Quality assessment of continuously cast billets.

[0024] Based on the actual performance data of the continuously cast billets and the production performance data of the continuous casting machine, the quality of the produced continuously cast billets is judged, and the quality data of the continuously cast billets is sent to the continuous casting billet secondary finishing system (finishing L1). The continuous casting finishing L1 accurately locates the defect area according to the defect level of the abnormal event and the billet length corresponding to the abnormal event, and quickly processes it, reducing the impact on the surface quality of good billets. At the same time, it reduces the labor intensity of the operators in the continuous casting billet finishing area.

[0025] Compared to existing technologies, this invention has the following advantages: The L3 steelmaking production planning control system issues the target billet pulling speed for continuous casting production; the L2 continuous casting machine process control system reads the target billet pulling speed; and, considering operations such as furnace changes, tundish changes, billet width adjustments, steel grade mixing casting, and submerged entry nozzle changes during continuous casting production, as well as abnormal events such as steel superheat, submerged entry nozzles, and continuous casting machine shutdowns, the optimal continuous casting billet pulling speed is calculated and issued to the continuous casting L1 system to control the continuous casting billet pulling speed. This achieves fully automatic control of the continuous casting billet pulling speed, improves the level of automatic control of the continuous casting machine, and eliminates the need for manual intervention. To improve the yield of continuously cast billets, the system sends abnormal event data related to changes in the billet pulling speed of the continuous casting machine to the continuous casting length cutting optimization module and the continuous casting billet quality judgment module in the L2 continuous casting machine process control. This allows for optimized cutting of the continuous casting billet length and judgment of the billet quality. The judgment results are then sent to the L1 continuous casting machine billet finishing control system. This enables rapid and accurate positioning of continuously cast billets with quality defects, allowing for secondary processing. This reduces the labor intensity of operators in the billet finishing area and prevents defective continuously cast billets from entering subsequent production processes. Attached Figure Description

[0026] Figure 1 This is a system flowchart of the present invention;

[0027] Figure 2 This is a schematic diagram of the system structure. Detailed implementation method:

[0028] To enhance understanding of the present invention, the embodiments will be described in detail below with reference to the accompanying drawings.

[0029] Example 1: See Figure 1A continuous casting machine billet speed control and secondary processing system is disclosed. The system includes a steelmaking production planning control system (L3), a continuous casting machine process control system (continuous casting L2), a continuous casting machine basic automation system, and a continuous casting slab finishing control system. The steelmaking production planning control system (L3) is connected to the continuous casting machine basic automation system and the continuous casting slab finishing control system through the continuous casting machine process control system (continuous casting L2). The steelmaking production planning control system calculates the target billet speed for the continuous casting production plan based on the production status of the entire steelmaking process and sends it to the continuous casting machine process control system (continuous casting L2). The continuous casting machine process control system includes a continuous casting plan receiving module, a continuous casting billet speed calculation module, a billet cutting length optimization module, and a billet quality judgment module. The continuous casting plan receiving module receives the target billet speed for continuous casting production; the continuous casting billet speed calculation module calculates the optimal continuous casting machine billet speed based on various operations and abnormal events during the continuous casting production process. The calculation results are sent to the continuous casting machine basic automation system (continuous casting L1) to control the continuous casting machine equipment for speed control. The billet cutting length optimization module optimizes the billet cutting length for abnormal situations that occur during the billet pulling control of the continuous casting machine, improves the billet yield, and sends the calculation results to the billet quality judgment module. The billet quality judgment module judges the quality of the produced continuous casting billets and sends the results to the continuous casting billet finishing control system (finishing L1) for secondary processing of the continuous casting billets to reduce quality defects.

[0030] The system processing method includes the following steps: Step 1: The target casting speed of the continuous casting machine is issued.

[0031] The steelmaking production planning and control system (steelmaking L3) calculates the target billet pulling speed V of the continuous casting machine based on the steelmaking production status. AIM And it was issued to the continuous casting process control system (continuous casting L2).

[0032] Step 2: Receive the target billet casting speed of the continuous casting machine.

[0033] The continuous casting machine process control system (continuous casting L2) receives the target billet casting speed from the steelmaking production planning control system (steelmaking L3).

[0034] Step 3: Periodically read the production performance data of the continuous casting machine, and calculate the optimal billet pulling speed V based on the production performance data:

[0035] 1) Is there a heat change? If there is no heat change, proceed to the next step; if there is a heat change, calculate the superheat of the molten steel for the next heat based on the exit temperature of the previous process. Calculate the first continuous casting time Tsh based on the temperature drop rate of the molten steel in the continuous casting process. Calculate the second continuous casting time Tt based on the molten steel flow rate in the continuous casting process and the molten steel flow rate for the next heat. Calculate the minimum billet pulling speed Vmin based on max[Tsh,Tt], compare it with the current actual pulling speed Vcurr, min[Vmin,Vcurr], to obtain the pulling speed V1 for this step, and proceed to the next step.

[0036] 2) Width adjustment: If there is no width adjustment, proceed to the next step; if there is a width adjustment, calculate the billet width adjustment value W, calculate the width adjustment time Twid based on the working speed of the hydraulic cylinder of the width adjustment equipment Vequ, and then calculate the billet pulling speed Vwid based on the continuous casting width adjustment range Ladjust. Compare it with the current actual pulling speed Vcurr, min[Vwid, Vcurr], and obtain the pulling speed V2 for this step, then proceed to the next step.

[0037] 3) Whether mixed casting is used: If there is no mixed casting, proceed to the next step; if there is mixed casting, convert the allowable length Lmix of mixed casting into the steel volume WEIGHT, and then calculate the billet pulling speed Vmix based on the current actual steel volume WEIGHTtr. Compare it with the current actual pulling speed Vcurr, min[Vmix, Vcurr], and obtain the pulling speed V3 of this step, then proceed to the next step.

[0038] 4) Based on the target billet speed received by the continuous casting machine process control system (continuous casting L2), the calculated billet speed is greater than the target billet speed V. AIM Using the calculated casting speed V1 as the optimal casting speed V for the continuous casting machine is both economical and efficient, as well as safe and reliable. However, if the calculated casting speed is less than the target casting speed V... AIM Then the target drawing speed V is adopted. AIM The optimal billet pulling speed V for continuous casting machines;

[0039] Step 4: Issue the throwing speed.

[0040] The optimal billet pulling speed V of the continuous casting machine is sent to the continuous casting basic automation system (continuous casting L1) to control the continuous casting equipment to perform speed control during lifting and lowering; and abnormal data of billet pulling speed changes during lifting and lowering are sent to the continuous casting billet cutting length optimization module (continuous casting L2).

[0041] Step 5: Optimize the cutting length of the continuously cast billet.

[0042] Abnormal changes in the billet drawing speed during the lifting and lowering process of the continuous casting machine can affect the quality of the continuously cast billet. Subsequent processes will cut off this part of the billet. Therefore, based on the casting length corresponding to the abnormal billet drawing speed event, we should first consider the adjacent abnormal events to be in the same area. When cutting the continuously cast billet in this area where quality defects may exist, we should consider cutting at the head, tail, or joint of two continuously cast billets, and avoid cutting in the middle part of the continuously cast billet as much as possible. This will avoid the loss of good billets produced by multiple manual cuttings on the continuous casting line, improve the yield of the continuous casting machine, and reduce the number of continuously cast billets with quality defects.

[0043] Step 6: Quality assessment of continuously cast billets.

[0044] Based on the actual performance data of the continuously cast billets and the production performance data of the continuous casting machine, the quality of the produced continuously cast billets is judged, and the quality data of the continuously cast billets is sent to the continuous casting billet secondary finishing system (finishing L1). The continuous casting finishing L1 accurately locates the defect area according to the defect level of the abnormal event and the billet length corresponding to the abnormal event, and quickly processes it, reducing the impact on the surface quality of good billets. At the same time, it reduces the labor intensity of the operators in the continuous casting billet finishing area.

[0045] Installation and operation process: Refer to Figure 1 — Figure 2With the continuous improvement of continuous casting production technology and requirements, the requirements for matching and controlling molten steel production between steelmaking converters and continuous casting are also increasing. Therefore, the control of billet casting speed in the continuous casting production process is becoming increasingly important. During continuous casting, various operations and abnormal situations, such as molten steel superheating, billet width adjustment, heat change, steel grade mixing, submerged entry nozzle replacement, and nozzle blockage, all require speed control of the billet casting machine. Currently, on-site control of the billet casting speed is mainly achieved by operators manually adjusting the speed based on process cards, heat results, and on-site production conditions. However, due to differences in individual operation and understanding, this manual control of the billet casting speed can be unstable and untimely, affecting the continuous casting production rhythm, causing fluctuations in the molten steel level in the crystallizer, and ultimately impacting the quality of the continuously cast billet. This invention provides a method for controlling and secondary processing the billet casting speed of a continuous casting machine. The L3 steelmaking production planning control system issues the target billet casting speed, and the L2 continuous casting machine process control system reads this target speed. Taking into account operations such as furnace changes, tundish changes, billet width adjustments, steel grade mixing, and submerged entry nozzle changes during continuous casting, as well as abnormal events such as steel superheat, submerged entry nozzle issues, and continuous casting machine shutdowns, the method controls the billet casting speed. Simultaneously, abnormal events occurring during the billet casting speed changes are sent to the continuous casting length cutting optimization module and the continuous casting billet quality judgment module in the L2 continuous casting machine process control system for optimized billet length cutting and billet quality judgment. The billet quality judgment results are then sent to the L1 continuous casting machine billet finishing control system for secondary processing of billets with quality defects. This achieves fully automated control of the continuous casting machine's billet casting speed, eliminates human factors, improves billet yield and quality, and enhances the level of automation in the continuous casting machine.

[0046] It should be noted that the above embodiments are not intended to limit the scope of protection of the present invention. Equivalent transformations or substitutions made based on the above technical solutions all fall within the scope of protection of the claims of the present invention.

Claims

1. A continuous casting machine billet pulling speed control and secondary processing system, characterized in that, The system includes a steelmaking production planning control system L3, a continuous casting machine process control system L2, a continuous casting machine basic automation system, and a continuous casting slab finishing control system. The steelmaking production planning control system L3 is connected to the continuous casting machine basic automation system and the continuous casting slab finishing control system through the continuous casting machine process control system L2. The continuous casting machine process control system includes a continuous casting plan receiving module, a continuous casting billet pulling speed calculation module, a billet cutting length optimization module, and a billet quality judgment module. The continuous casting plan receiving module is used to receive the target billet pulling speed for continuous casting production. The continuous casting billet speed calculation module calculates the optimal continuous casting machine billet based on various operations and abnormal events during the continuous casting production process, and sends the calculation results to the continuous casting machine basic automation system L1 to control the continuous casting machine equipment to perform speed increase and decrease control. The billet cutting length optimization module optimizes the billet cutting length in response to abnormal situations that occur during the billet pulling control of the continuous casting machine, thereby improving the billet yield and sending the calculation results to the billet quality judgment module. The billet quality judgment module judges the quality of the produced continuous casting billets and sends the results to the continuous casting billet finishing control system, namely finishing L1, to perform secondary processing on the continuous casting billets and reduce quality defects.

2. The continuous casting machine billet pulling speed control and secondary processing system according to claim 1, characterized in that, The system processing method includes the following steps: Step 1: The target casting speed for the continuous casting machine is issued. The steelmaking production planning and control system L3 calculates the target billet pulling speed V of the continuous casting machine based on the steelmaking production status. AIM And it was issued to the continuous casting process control system L2. Step 2: Receive the target billet casting speed of the continuous casting machine. The continuous casting process control system L2 receives the target casting speed from the steelmaking production planning control system L3. Step 3: Periodically read the production performance data of the continuous casting machine, and calculate the optimal billet pulling speed V based on the production performance data: 1) Is there a heat change? If there is no heat change, proceed to the next step. If there is a heat change, calculate the superheat of the molten steel for the next heat based on the temperature of the previous process exiting the station. Calculate the first continuous casting time Tsh based on the temperature drop rate of the molten steel in the continuous casting process. Calculate the second continuous casting time Tt based on the molten steel flow rate in the continuous casting process and the molten steel flow rate for the next heat. Calculate the minimum billet pulling speed Vmin based on max [Tsh, Tt], compare it with the current actual pulling speed Vcurr, min[Vmin, Vcurr], to obtain the pulling speed V1 for this step, and proceed to the next step. 2) Width adjustment: If there is no width adjustment, proceed to the next step; if there is a width adjustment, calculate the billet width adjustment value W, calculate the width adjustment time Twid based on the working speed of the hydraulic cylinder of the width adjustment equipment Vequ, and then calculate the billet pulling speed Vwid based on the continuous casting width adjustment range Ladjust. Compare it with the current actual pulling speed Vcurr, min [Vwid, Vcurr], and obtain the pulling speed V2 for this step, then proceed to the next step. 3) Whether mixed casting is used: If there is no mixed casting, proceed to the next step; if there is mixed casting, convert the allowable length Lmix of mixed casting into the steel volume WEIGHT, and then calculate the billet pulling speed Vmix based on the current actual steel volume WEIGHTtr. Compare it with the current actual pulling speed Vcurr, min [Vmix, Vcurr], and obtain the pulling speed V3 for this step, then proceed to the next step. 4) Based on the target billet speed received by the continuous casting machine L2 in the continuous casting process control system, the calculated billet speed is greater than the target billet speed V. AIM Using the calculated casting speed V1 as the optimal casting speed V for the continuous casting machine is both economical and efficient, as well as safe and reliable. However, if the calculated casting speed is less than the target casting speed V... AIM Then the target drawing speed V is adopted. AIM The optimal billet pulling speed V for continuous casting machines; Step 4: Issue the throwing speed. The optimal continuous casting machine billet pulling speed V is sent to the continuous casting basic automation system L1 to control the continuous casting equipment to perform speed control during lifting and lowering; and abnormal data of billet pulling speed changes during lifting and lowering are sent to the continuous casting billet cutting length optimization module L2. Step 5: Optimize the cutting length of the continuously cast billet. Abnormal data on the billet speed changes during the lifting and lowering process of the continuous casting machine can affect the quality of the continuously cast billet. Subsequent processes will cut off this part of the billet. Therefore, based on the casting length corresponding to the abnormal billet speed change event, we should first consider the adjacent abnormal events to be in the same area. When cutting the continuously cast billet in the area that may have quality defects, we should consider cutting at the head, tail, or joint of two continuously cast billets, and avoid cutting in the middle part of the continuously cast billet as much as possible. This will avoid the loss of good billets produced by multiple manual cuttings on the continuous casting line, improve the yield of the continuous casting machine, and reduce the number of continuously cast billets with quality defects. Step 6: Quality assessment of continuously cast billets. Based on the actual performance data of the continuously cast billets and the production performance data of the continuous casting machine, the quality of the produced continuously cast billets is judged, and the quality data of the continuously cast billets is sent to the secondary finishing system of the continuously cast billets, namely finishing L1. The continuous casting finishing L1 accurately locates the defect area according to the defect level of the abnormal event and the billet length corresponding to the abnormal event, and quickly processes it, reducing the impact on the surface quality of good billets. At the same time, it reduces the labor intensity of the operators in the finishing area of ​​the continuously cast billets.

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