A method for controlling argon blowing of threaded steel

Abstract

The application provides a threaded steel argon blowing control method, and relates to the technical field of molten steel preparation, and comprises the following steps: S1, preliminary preparation: before the molten steel enters an argon station, a worker needs to check the equipment state of the argon station in advance. The application provides a threaded steel argon blowing control method, which abandons the traditional fixed 4-minute argon blowing mode, dynamically adjusts the argon blowing strength and time length according to the alloy addition amount, controls the main argon blowing within 1-2 minutes, greatly shortens the treatment time of the molten steel in the argon station, avoids the problem that the outgoing composition needs to be determined before the molten steel is poured on the platform, guarantees the smooth production rhythm of continuous casting, solves the defects of the traditional process treatment rhythm tension and insufficient soft blowing time, effectively avoids the problem of intensified molten steel temperature drop caused by long-time argon blowing through dynamic and on-demand argon blowing, and does not need to improve the converter tapping temperature, thereby reducing the converter energy consumption, bottom argon blowing cost, furnace protection cost, ladle refractory loss and alloy consumption, and realizing low-consumption and high-efficiency operation of the steelmaking process.

Description

Technical Field

[0001] This application relates to the field of steel preparation technology, and in particular to a method for controlling argon blowing in rebar. Background Technology

[0002] In traditional rebar production processes, regardless of the amount of alloy added to the converter, molten steel must be purged with argon for 4 minutes after entering the argon station before sampling and temperature measurement can be performed. If subsequent composition adjustments are required, the processing time becomes tight, and the soft-blowing time is difficult to guarantee. Often, the steel must be poured before the composition at the outlet is fully determined, otherwise the continuous casting rhythm will be affected. This process is not conducive to improving steel quality, easily leads to secondary oxidation of the steel, and restricts the efficiency of continuous casting production.

[0003] Meanwhile, excessively long argon blowing time leads to a significant drop in molten steel temperature, requiring higher converter tapping temperatures and increasing converter energy consumption, bottom-blowing argon costs, furnace protection costs, ladle refractory material consumption, and alloy consumption. Therefore, it is urgent to scientifically regulate argon blowing time to meet the requirements of modern, efficient, and low-consumption steelmaking processes. Traditional argon blowing processes have fixed times, resulting in high energy consumption, large temperature drops, and tight production schedules, which affect steel quality and cost control. Summary of the Invention

[0004] This application is made in view of the above-mentioned problems, and its purpose is to provide a method for controlling argon blowing in rebar to solve the problems mentioned in the background art. To achieve the above objectives, the present invention provides the following technical solution: a method for controlling argon blowing in rebar, comprising the following steps: S1. Preliminary preparation: Before the molten steel enters the argon station, the staff needs to check the status of the argon station equipment in advance, including the sealing of the argon pipeline, the integrity of the argon blowing gun, and the detection accuracy of the temperature measurement and sampling device, to ensure that the equipment is operating normally without leaks or malfunctions. S2. Information Acquisition: After the molten steel has been stabilized, the alloy addition data for the current heat is retrieved through the production control system, including the actual addition of various alloys such as ferromanganese, ferrosilicon, and ferrovanadium, and then the accuracy of the data is verified. S3. Argon blowing intensity judgment: Compare the actual total amount of alloy added with the preset threshold to determine the required argon blowing intensity; S4. Dynamic Argon Blowing Execution: After the molten steel enters the argon station, the argon blowing time is determined according to the current alloy addition amount (it needs to be controlled within 1 to 2 minutes), and the argon blowing intensity is adjusted according to the comparison between the alloy addition amount and the preset threshold. S5. Real-time detection: After the argon blowing operation is completed, stop the argon blowing immediately, then quickly adjust the temperature measurement and sampling device to measure the temperature in different areas of the ladle (at least 3 points), and record the actual temperature of the molten steel. Compare it with the preset temperature standard for rebar production (generally 1500-1550℃, adjusted according to the steel grade). S6. Result Judgment: Based on the temperature measurement and composition analysis results, a dual judgment is made. If the molten steel temperature is within the preset range and all components meet the standards, it is considered qualified and proceeds to the next process. If the molten steel temperature is abnormal (too high or too low) or any component fails to meet the standard, it is considered unqualified and the closed-loop fine-tuning process is initiated. S7. Closed-loop fine-tuning: Determine whether to perform component fine-tuning based on the sampling results. After fine-tuning, a short soft blow (about 1 minute) can be performed as needed. S71. Component Fine-tuning: Based on the component analysis report issued by the laboratory, accurately calculate the amount of alloy to be added for elements that do not meet the standards, and add the corresponding alloy quickly and evenly to avoid excessive addition that may lead to excessive component levels. S72. Short-time soft blowing: After the alloy is added, start the argon blowing system, adjust it to the low-flow soft blowing mode, and perform a short-time soft blowing operation. The duration should be significantly shorter than the main argon blowing time (1-2 minutes recommended) to ensure that the added alloy is fully dissolved, while avoiding excessive loss of molten steel temperature and uneven composition again. S73. Secondary inspection: After the soft blowing is completed, the temperature of the molten steel is measured and sampled for analysis again to confirm that the temperature and composition meet the rebar production standards. If the secondary inspection is still unqualified, the above fine-tuning and soft blowing steps are repeated until the standard is met. If the standard cannot be met after multiple fine-tunings, the production manager must be notified in time and the abnormal handling process must be initiated. S8. Molten Steel Delivery: After confirming that the composition is qualified, promptly proceed with casting to ensure the continuous casting rhythm.

[0005] Furthermore, in step S1, after the molten steel is transferred to the argon station, the ladle needs to be placed stably and its position adjusted so that the argon blowing gun is aimed at the center area of ​​the ladle, ensuring that the argon blowing evenly covers the surface of the molten steel and avoiding inadequate local stirring.

[0006] Furthermore, in step S1, it is also necessary to retrieve the production plan and steel grade standard (compatible with rebar grade, such as HRB400E, etc.) of the current furnace batch in advance, confirm the preset threshold for alloy addition (first preset threshold, second preset threshold), and clarify the core requirements of rebar production for molten steel composition and temperature.

[0007] Furthermore, the specific judgment criteria in step S3 are as follows: if the amount of alloy added is less than the first preset threshold, it indicates that the composition of the molten steel is relatively simple, the requirement for composition homogenization and inclusion removal is low, and it is determined to perform low-intensity argon blowing operation; if the amount of alloy added is greater than or equal to the first preset threshold, it indicates that the composition of the molten steel is more complex, and it is necessary to achieve composition homogenization and remove harmful inclusions through thorough stirring, and it is determined to perform high-intensity argon blowing operation.

[0008] Furthermore, in step S4, the low-intensity argon blowing operation (i.e., alloy addition amount < first preset threshold) involves: first, starting the argon blowing system and adjusting the argon flow rate to the preset low-intensity flow rate (to meet the stirring requirements of molten rebar and avoid excessive flow rate leading to molten steel splashing); then, performing the first duration argon blowing operation, which is set shorter than the traditional fixed argon blowing duration (3-4 minutes is recommended, but can be fine-tuned according to the ladle capacity and molten steel temperature to ensure basic homogenization requirements are met); finally, during the argon blowing process, the molten steel surface status is observed in real time to avoid splashing or slag entrapment. If any abnormality occurs, the argon flow rate is fine-tuned in a timely manner.

[0009] Furthermore, in step S4, the high-intensity argon blowing operation (i.e., the amount of alloy added is ≥ the first preset threshold) involves: first, starting the argon blowing system and adjusting the argon flow rate to the preset high-intensity flow rate (ensuring sufficient stirring intensity to promote full dissolution of the alloy and the floating of inclusions). Then, the second-duration argon blowing operation is performed, which is maintained or close to the traditional fixed argon blowing duration (4-5 minutes is recommended, with slight adjustments based on the complexity of the molten steel composition to ensure uniform composition and adequate removal of inclusions). Finally, during the argon blowing process, the temperature change of the molten steel is monitored in real time to avoid excessive temperature loss due to over-stirring. If the temperature drop exceeds the allowable range, the argon blowing flow rate or duration can be adjusted appropriately.

[0010] Furthermore, in step S4, during the argon blowing process, the operator must be on duty throughout the entire process, closely observe the equipment operating status and changes in the molten steel level, and promptly handle any abnormal situations (such as argon leakage, molten steel splashing, etc.).

[0011] Furthermore, in step S5, while measuring the temperature, molten steel is sampled simultaneously. The sample is then quickly sent to the laboratory for composition analysis, with a focus on detecting the content of key elements such as C, Si, Mn, V, P, and S. The composition is then checked to see if it meets the corresponding rebar grade's composition standard.

[0012] Furthermore, in step S8, after confirming that the temperature and composition of the molten steel are all qualified, the relevant equipment of the argon station is shut down in a timely manner, the position of the ladle is adjusted, and preparations are made for transfer. Then, the qualified molten steel is transferred smoothly to the continuous casting process. During the transfer process, heat preservation measures are taken to reduce heat loss and to avoid excessive slag entrapment caused by excessive sloshing of the molten steel.

[0013] Furthermore, in step S8, after the qualified steel is transferred, key data such as the argon blowing time, argon flow rate, alloy addition amount, and test results of the current furnace are recorded to form a production record, which facilitates subsequent process optimization and traceability.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This method abandons the traditional fixed 4-minute argon blowing mode and dynamically adjusts the argon blowing intensity and duration according to the amount of alloy added. The main argon blowing is controlled within 1-2 minutes, which greatly shortens the processing time of molten steel in the argon station. It avoids the problem of having to start casting before the composition of the steel is determined, ensuring a smooth continuous casting production rhythm. It solves the defects of the traditional process, such as tight processing rhythm and insufficient soft blowing time. Furthermore, by dynamically and on demand blowing argon, it effectively avoids the problem of aggravated temperature drop of molten steel caused by long-term argon blowing. It does not require increasing the converter tapping temperature, thereby reducing converter energy consumption, bottom blowing argon cost, furnace protection cost, ladle refractory material loss and alloy consumption, and achieving low-consumption and high-efficiency operation of the steelmaking process. Furthermore, this method precisely matches the argon blowing intensity with the amount of alloy added. Low-intensity argon blowing is used for low alloy additions, while high-intensity argon blowing is used for high alloy additions. This ensures compositional homogenization, thorough removal of harmful inclusions, and reduces secondary oxidation caused by prolonged exposure of molten steel, thereby improving the purity and compositional stability of the rebar. Moreover, the method involves immediate temperature measurement and sampling after argon blowing, dual judgment, and a closed-loop process of compositional fine-tuning, short-term soft blowing, and secondary testing when the steel fails to meet the standards. This effectively ensures that the temperature and key elemental composition of the molten steel fully comply with the rebar production standards, thus preventing unqualified molten steel from entering the continuous casting process. For every minute the argon blowing time is reduced, the temperature of the molten steel can be saved by about 4°C, reducing the risk of secondary oxidation. Reducing the tapping temperature by 8℃ saves approximately 0.6 kg / t of scrap steel; optimizes the continuous casting rhythm, improves endpoint control, and enhances molten steel quality; resulting in significant annual cost savings (see economic benefit calculation for details). Economic benefit calculation: Direct benefits: Reducing the tapping temperature by 8℃ is equivalent to saving 0.6 kg / t of scrap steel; based on an annual production of 1.9 million tons of rebar, the annual cost savings are: Scrap steel cost: 1,900,000 × 0.6 × 0.8 = 912,000 yuan; Argon cost: 600L / 1000 × 2.6 / 100 × 1,900,000 = 29,640 yuan; Converter oxygen consumption: 30 Nm³ × 0.6 / 100 × 1,900,000 = 342,000 yuan; Total direct economic benefits: 1,283,640 yuan / year (excluding alloy and refractory material costs); Indirect benefits: Optimizing argon blowing time facilitates continuous casting rhythm control. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this drawing 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 only some embodiments of this drawing. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1This is a schematic diagram of the operation process of the present invention.

[0017] The purpose, features, and advantages of this accompanying drawing will be further explained in conjunction with the embodiments and with reference to the accompanying drawing. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the following description and illustration are provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0019] Obviously, the following description is merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios without any inventive effort. Furthermore, it is understood that although the effort involved in such development may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0020] Unless otherwise specified, the terms "comprising" and "including" as used in this application can be open-ended or closed-ended. For example, "comprising" and "including" can mean that other components not listed may also be included, or that only the listed components may be included.

[0021] Unless otherwise specified, the term "or" is inclusive in this application. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, the condition "A or B" is satisfied by any of the following conditions: A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); or both A and B are true (or exist).

[0022] Terminology explanation: such as Figure 1 As shown, a method for controlling argon blowing in rebar includes the following steps: S1. Preliminary Preparations: Before the molten steel enters the argon station, staff must check the status of the argon station equipment, including the sealing of the argon pipeline, the integrity of the argon blowing gun, and the detection accuracy of the temperature sampling device, to ensure that the equipment is operating normally without leaks or malfunctions. After the molten steel is transferred to the argon station, the ladle is placed smoothly at the argon station workstation using a crane. Sudden stops and drops are prohibited to avoid violent shaking and slag entrapment of the molten steel. The positioning device is used to align the argon blowing gun with the center area of ​​the ladle to ensure that the argon blowing flow evenly covers the surface of the molten steel and avoids inadequate local stirring. It is also necessary to retrieve the production plan and steel grade standard (compatible with rebar grades, such as HRB400E, etc.) of the current heat in advance, confirm the preset threshold for alloy addition (first preset threshold, second preset threshold), and clarify the core requirements for steel composition and temperature in rebar production. S2. Information Acquisition: After the molten steel is stabilized, the alloy addition data for the current furnace batch is retrieved through the production control system, including the actual addition of various alloys such as ferromanganese, ferrosilicon, and ferrovanadium. Then, the accuracy of the data is checked. If any abnormality is found, the furnace operator is immediately contacted for confirmation to ensure that the total alloy amount is calculated accurately, providing a reliable basis for subsequent argon blowing intensity judgment. S3. Argon blowing intensity judgment: Compare the actual total amount of alloy added with the preset threshold to determine the required argon blowing intensity. The specific judgment criteria are as follows: If the amount of alloy added is less than the first preset threshold, it indicates that the composition of the molten steel is relatively simple, the requirement for composition homogenization and inclusion removal is low, and low-intensity argon blowing operation is determined. If the amount of alloy added is greater than or equal to the first preset threshold, it indicates that the composition of the molten steel is more complex, and it is necessary to achieve composition homogenization and remove harmful inclusions through thorough stirring, and high-intensity argon blowing operation is determined. S4. Dynamic Argon Blowing Execution: After molten steel enters the argon station, the argon blowing time is determined based on the current alloy addition amount (it needs to be controlled within 1-2 minutes). The argon blowing intensity is adjusted based on the comparison between the alloy addition amount and a preset threshold (the preset threshold needs to be calibrated regularly based on the rebar grade, ladle capacity, and production process parameters to ensure the accuracy of the judgment standard). Low-intensity argon blowing operation (i.e., alloy addition amount < first preset threshold) steps: First, start the argon blowing system and adjust the argon flow rate to the preset low-intensity flow rate (adapting to the rebar molten steel stirring requirements and avoiding excessive flow causing molten steel splashing). Then, execute the first duration argon blowing operation, which is set shorter than the traditional fixed argon blowing time (3-4 minutes is recommended, but can be fine-tuned according to ladle capacity and molten steel temperature to ensure basic homogenization is met). (For homogenization purposes only), during the argon blowing process, observe the molten steel surface in real time to avoid splashing or slag entrapment. If any abnormalities occur, fine-tune the argon flow rate. High-intensity argon blowing operation (i.e., alloy addition ≥ first preset threshold) steps: First, start the argon blowing system and adjust the argon flow rate to the preset high-intensity flow rate (to ensure sufficient stirring intensity, promote full dissolution of the alloy, and allow inclusions to float). Then, perform the second-duration argon blowing operation, which should be maintained or close to the traditional fixed argon blowing duration (4-5 minutes is recommended, fine-tuned according to the complexity of the molten steel composition to ensure uniform composition and adequate removal of inclusions). Finally, during the argon blowing process, monitor the molten steel temperature changes in real time to avoid excessive temperature loss due to over-stirring. If the temperature drops beyond the allowable range, adjust the argon blowing flow rate or duration accordingly. S5. Immediate Detection: After the argon blowing operation is completed, stop the argon blowing immediately. Then, quickly adjust the temperature measurement and sampling device to measure the temperature in different areas of the ladle (at least 3 points) and record the actual temperature of the molten steel. Compare this temperature with the preset temperature standard for rebar production (generally 1500-1550℃, adjusted according to the steel grade). Simultaneously, take samples of the molten steel while measuring the temperature. Then, quickly send the samples to the laboratory for composition analysis, focusing on the content of key elements such as C, Si, Mn, V, P, and S. Then, check whether it meets the composition standard of the corresponding rebar grade. It is necessary to ensure that the temperature measurement and sampling are carried out quickly and in a standardized manner to avoid temperature drop and composition deviation due to operation delays, which would affect the test results. S6. Result Judgment: Based on the temperature measurement and composition analysis results, a dual judgment is made. If the molten steel temperature is within the preset range and all components meet the standards, it is considered qualified and proceeds to the next process. If the molten steel temperature is abnormal (too high or too low) or any component fails to meet the standard, it is considered unqualified and the closed-loop fine-tuning process is initiated. S7. Closed-loop fine-tuning: Determine whether to perform composition fine-tuning based on the sampling results. After fine-tuning, a short soft blowing (about 1 minute) can be performed as needed. During the closed-loop fine-tuning process, the amount of alloy added must be precisely controlled. The soft blowing time and flow rate must strictly follow the specifications to prevent problems such as excessive composition or abnormal temperature. S71. Component Fine-tuning: Based on the component analysis report issued by the laboratory, accurately calculate the amount of alloy to be added for elements that do not meet the standards, and add the corresponding alloy quickly and evenly to avoid excessive addition that may lead to excessive component levels. S72. Short-time soft blowing: After the alloy is added, start the argon blowing system, adjust it to the low-flow soft blowing mode, and perform a short-time soft blowing operation. The duration should be significantly shorter than the main argon blowing time (1-2 minutes recommended) to ensure that the added alloy is fully dissolved, while avoiding excessive loss of molten steel temperature and uneven composition again. S73. Secondary inspection: After the soft blowing is completed, the temperature of the molten steel is measured and sampled for analysis again to confirm that the temperature and composition meet the rebar production standards. If the secondary inspection is still unqualified, the above fine-tuning and soft blowing steps are repeated until the standard is met. If the standard cannot be met after multiple fine-tunings, the production manager must be notified in time and the abnormal handling process must be initiated. S8. Molten Steel Transportation: After confirming that the composition is qualified, pour the steel onto the platform in a timely manner to ensure the continuous casting rhythm. Once the temperature and composition of the molten steel are confirmed to be qualified, shut down the relevant equipment of the argon station in a timely manner, adjust the position of the ladle, and prepare for transfer. Then, transfer the qualified molten steel smoothly to the continuous casting process. During the transfer, take good insulation measures to reduce temperature loss and avoid excessive sloshing of the molten steel, which may cause slag entrapment. After the qualified steel is transferred, record key data such as the argon blowing time, argon flow rate, alloy addition amount, and test results of the current heat to form a production record, which will facilitate subsequent process optimization and traceability.

[0023] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.

Claims

1. A method for controlling argon blowing in rebar, characterized in that: The argon blowing method includes the following steps: S1. Preliminary preparation: Before the molten steel enters the argon station, the staff needs to check the status of the argon station equipment in advance, including the sealing of the argon pipeline, the integrity of the argon blowing gun, and the detection accuracy of the temperature measurement and sampling device, to ensure that the equipment is operating normally without leaks or malfunctions. S2. Information Acquisition: After the molten steel has been stabilized, the alloy addition data for the current heat is retrieved through the production control system, including the actual addition of various alloys such as ferromanganese, ferrosilicon, and ferrovanadium, and then the accuracy of the data is verified. S3. Argon blowing intensity judgment: Compare the actual total amount of alloy added with the preset threshold to determine the required argon blowing intensity; S4. Dynamic Argon Blowing Execution: After the molten steel enters the argon station, the argon blowing time is determined according to the current alloy addition amount, and the argon blowing intensity is adjusted according to the comparison between the alloy addition amount and the preset threshold. S5. Real-time detection: After the argon blowing operation is completed, stop the argon blowing immediately, then quickly adjust the temperature measurement and sampling device to measure the temperature in different areas of the ladle and record the actual temperature of the molten steel, and compare it with the preset temperature standard for rebar production. S6. Result Judgment: Based on the temperature measurement and composition analysis results, a dual judgment is made. If the molten steel temperature is within the preset range and all components meet the standards, it is considered qualified and proceeds to the next process. If the molten steel temperature is abnormal or any component fails to meet the standards, it is considered unqualified and the closed-loop fine-tuning process is initiated. S7. Closed-loop fine-tuning: Determine whether to perform component fine-tuning based on the sampling results. After fine-tuning, a short-term soft blowing can be performed as needed. S71. Component Fine-tuning: Based on the component analysis report issued by the laboratory, accurately calculate the amount of alloy to be added for elements that do not meet the standards, and add the corresponding alloy quickly and evenly to avoid excessive addition that may lead to excessive component levels. S72. Short-time soft blowing: After the alloy is added, start the argon blowing system, adjust it to the low-flow soft blowing mode, and perform short-time soft blowing operation. The duration should be significantly shorter than the main argon blowing time to ensure that the added alloy is fully dissolved, while avoiding excessive loss of molten steel temperature and uneven composition again. S73. Secondary inspection: After the soft blowing is completed, the temperature of the molten steel is measured and sampled for analysis again to confirm that the temperature and composition meet the rebar production standards. If the secondary inspection is still unqualified, the above fine-tuning and soft blowing steps are repeated until the standard is met. If the standard cannot be met after multiple fine-tunings, the production manager must be notified in time and the abnormal handling process must be initiated. S8. Molten Steel Delivery: After confirming that the composition is qualified, promptly proceed with casting to ensure the continuous casting rhythm.

2. The method for controlling argon blowing in rebar according to claim 1, characterized in that, In step S1, after the molten steel is transferred to the argon station, the ladle needs to be placed stably and its position adjusted so that the argon blowing gun is aimed at the center area of ​​the ladle, ensuring that the argon blowing evenly covers the surface of the molten steel and avoiding inadequate local stirring.

3. The method for controlling argon blowing in rebar according to claim 2, characterized in that, In step S1, it is also necessary to retrieve the production plan and steel grade standards for the current furnace batch in advance, confirm the preset threshold for alloy addition for the furnace batch, and clarify the core requirements for steel composition and temperature in rebar production.

4. The method for controlling argon blowing in rebar according to claim 1, characterized in that, The specific judgment criteria in step S3 are as follows: if the amount of alloy added is less than the first preset threshold, it indicates that the composition of the molten steel is relatively simple, the requirement for composition homogenization and inclusion removal is low, and low-intensity argon blowing operation is determined to be performed. If the amount of alloy added is greater than or equal to the first preset threshold, it indicates that the composition of the molten steel is more complex, and it is necessary to achieve composition homogenization and remove harmful inclusions through thorough stirring, and high-intensity argon blowing operation is determined to be performed.

5. The method for controlling argon blowing in rebar according to claim 1, characterized in that, The low-intensity argon blowing operation steps in step S4 are as follows: First, start the argon blowing system and adjust the argon flow rate to the preset low-intensity flow rate. Then, perform the first duration of argon blowing operation, which is set to be shorter than the traditional fixed argon blowing duration. Finally, during the argon blowing process, observe the state of the molten steel surface in real time to avoid splashing or slag entrapment. If any abnormality occurs, adjust the argon flow rate in a timely manner.

6. The method for controlling argon blowing in rebar according to claim 5, characterized in that, The high-intensity argon blowing operation steps in step S4 are as follows: First, start the argon blowing system and adjust the argon flow rate to the preset high-intensity flow rate. Then, perform the second-duration argon blowing operation, which is maintained or close to the traditional fixed argon blowing duration. Finally, during the argon blowing process, monitor the temperature change of the molten steel in real time to avoid excessive temperature loss due to excessive stirring. If the temperature drops beyond the allowable range, the argon blowing flow rate or duration can be adjusted appropriately.

7. The method for controlling argon blowing in rebar according to claim 1, characterized in that, In step S4, during the argon blowing process, the operator must be on duty throughout the entire process, closely observe the equipment operating status and changes in the molten steel level, and promptly handle any abnormal situations.

8. The method for controlling argon blowing in rebar according to claim 1, characterized in that, In step S5, molten steel is sampled simultaneously with temperature measurement. The sample is then quickly sent to the laboratory for composition analysis, with a focus on detecting the content of key elements such as C, Si, Mn, V, P, and S. The composition standard of the corresponding rebar grade is then checked.

9. A method for controlling argon blowing in rebar according to claim 1, characterized in that, In step S8, after confirming that the temperature and composition of the molten steel are all qualified, the relevant equipment of the argon station is shut down in a timely manner, the position of the ladle is adjusted, and preparations are made for transfer. Then, the qualified molten steel is transferred smoothly to the continuous casting process. During the transfer process, heat preservation measures are taken to reduce heat loss and to avoid excessive slag entrapment caused by excessive sloshing of the molten steel.

10. A method for controlling argon blowing in rebar according to claim 9, characterized in that, In step S8, after the qualified steel is transferred, key data such as the argon blowing time, argon flow rate, alloy addition amount, and test results of the current furnace are recorded to form a production record, which facilitates subsequent process optimization and traceability.

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