Control method, device, electronic equipment and storage medium for argon blowing from bottom of converter ladle

Abstract

The present invention discloses a control method, device, electronic device and storage medium for bottom blowing argon in a converter ladle, wherein the control method comprises: obtaining the nitrogen content of molten steel in a converter; determining the type of molten steel in a converter according to the nitrogen content; obtaining the weight of molten steel in the converter ladle when the converter is tapping steel; determining the set flow rate of bottom blowing argon in the converter ladle according to the type and the weight of the molten steel, and performing closed-loop control based on the set flow rate of bottom blowing argon. The control method solves the problems of uncertain start timing and argon blowing amount in manual experience-based control of bottom blowing argon in a converter ladle, and is conducive to saving argon flow.

Description

Technical Field

[0001] The present application relates to the technical field of converter steelmaking, and in particular to a control method, device, electronic equipment and storage medium for argon blowing from the bottom of a converter ladle. Background Art

[0002] During the steel-making process of the converter, the converter ladle needs to stir the molten steel in real time by blowing argon from the bottom, so that the alloy material added to the converter ladle can be fully melted without agglomeration, slag and inclusions can be removed, the composition and temperature of the molten steel can be uniform, segregation can be reduced, and the yield of deoxidizer and alloy materials can be improved.

[0003] At present, the bottom blowing argon control process of the converter ladle requires the operator to manually start the bottom blowing argon, adjust the bottom blowing argon flow rate in real time according to the steel tapping conditions, and manually end the bottom blowing argon operation. This manual control method of bottom blowing argon based on experience has different people starting the bottom blowing argon at different times, switching the bottom blowing flow rate at different times, and ending the bottom blowing at different times. Even due to human negligence, the bottom blowing operation is forgotten to be ended, resulting in argon waste and lowering of the molten steel temperature in the converter ladle. Summary of the invention

[0004] The present invention provides a control method, device, electronic equipment and storage medium for argon blowing at the bottom of a converter ladle, so as to solve or partially solve the technical problem that argon blowing at the bottom of a converter ladle is currently operated by manual experience, different people are uncertain about the control process of the argon blowing, and argon is wasted.

[0005] In order to solve the above technical problems, in a first aspect, a method for controlling argon blowing at the bottom of a converter ladle is provided according to an embodiment of the present invention, comprising:

[0006] Obtain the nitrogen content of molten steel in converter smelting;

[0007] Determining the type of molten steel produced in the converter according to the nitrogen content;

[0008] When the converter is tapping steel, the weight of the molten steel in the converter ladle is obtained;

[0009] The bottom blowing argon set flow rate of the converter ladle is determined according to the type and the weight of the molten steel, and closed-loop control is performed based on the bottom blowing argon set flow rate.

[0010] Optionally, the type is ordinary steel; and determining the bottom blowing argon set flow rate of the converter ladle according to the type and the weight of the molten steel includes:

[0011] When the converter is tapping steel, if the weight of the molten steel is greater than or equal to 80 tons and less than 150 tons, the bottom blowing argon setting flow rate is determined to be 750-850m 3 / h;

[0012] When the converter is tapping steel, if the weight of the molten steel is greater than or equal to 150 tons and less than 200 tons, the bottom blowing argon setting flow rate is determined to be 1550-1650m 3 / h;

[0013] When the converter is tapping steel, if the weight of the molten steel is greater than or equal to 200 tons, the bottom blowing argon setting flow rate is determined to be 75-125m 3 / h.

[0014] Optionally, before the weight of the molten steel is greater than or equal to 80 tons and less than 150 tons, the control method further includes:

[0015] When the converter is tapping and the converter angle is detected to be less than -15°, the nitrogen shut-off valve and the argon shut-off valve are opened to determine the bottom blowing argon set flow rate to be 75-125m 3 / h.

[0016] Optionally, the control method further includes:

[0017] When the converter is tapping steel, if the weight of the molten steel is greater than or equal to 200 tons and the distance between the molten steel car and the molten steel car is less than 60,000 mm, the argon shut-off valve is closed and the bottom blowing argon set flow rate is reset to zero.

[0018] Optionally, the type is low nitrogen steel; and determining the bottom blowing argon set flow rate of the converter ladle according to the type and the weight of the molten steel includes:

[0019] When the converter is tapping steel, if the weight of the molten steel is greater than or equal to 80 tons and less than 200 tons, the bottom blowing argon setting flow rate is determined to be 950-1050m 3 / h.

[0020] Optionally, before the weight of the molten steel is greater than or equal to 80 tons and less than 200 tons, the control method further includes:

[0021] When the converter is tapping and the distance between the molten steel car and the converter is greater than 30000mm, open the argon cut-off valve and set the bottom blowing argon flow rate to 75-125m 3 / h.

[0022] Optionally, the control method further includes:

[0023] When the converter is tapping steel, if the weight of the molten steel is greater than or equal to 200 tons, the argon shut-off valve is closed and the bottom blowing argon set flow rate is reset to zero.

[0024] In a second aspect, based on the same inventive concept, a control device for argon blowing from the bottom of a converter ladle is provided according to an embodiment of the present invention, comprising:

[0025] An acquisition module is used to acquire the nitrogen content of the molten steel in the converter and the weight of the molten steel in the converter ladle when the converter is tapping steel;

[0026] A determination module, used to determine the type of the molten steel produced by the converter according to the nitrogen content;

[0027] A control module is used to determine the bottom blowing argon set flow rate of the converter ladle according to the type and the weight of the molten steel, and perform closed-loop control based on the bottom blowing argon set flow rate.

[0028] In the third aspect, based on the same inventive concept, an electronic device is provided according to an embodiment of the present invention, the electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of any one of the control methods provided in the first aspect are implemented.

[0029] In the fourth aspect, based on the same inventive concept, a computer-readable storage medium is provided according to an embodiment of the present invention, on which a computer program is stored, and when the computer program is executed by a processor, the steps of any one of the control methods provided in the first aspect are implemented.

[0030] Through one or more technical solutions of the present invention, the present invention has the following beneficial effects or advantages:

[0031] The invention provides a method for controlling argon blowing at the bottom of a converter ladle. The method determines the type of molten steel in the converter according to the nitrogen content of the molten steel smelted in the converter, and then quantitatively determines the set flow rate of the bottom argon blowing of the converter ladle according to the type of the molten steel and the weight of the molten steel in the converter ladle during steel tapping, and performs closed-loop control based on the set flow rate of the bottom argon blowing. In this way, the problems of uncertain start timing and argon blowing amount of the bottom argon blowing of the converter ladle, which exist in manual experience-based control of the bottom argon blowing of the converter ladle, are overcome, and the argon flow rate is saved, and the problem of low molten steel temperature in the converter ladle due to excessive argon blowing is avoided.

[0032] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limitations of the present invention. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings.

[0034] In the attached picture:

[0035] Figure 1 A schematic flow chart of a method for controlling argon blowing from the bottom of a converter ladle according to an embodiment of the present invention is shown;

[0036] Figure 2 A detailed logic control schematic diagram of a converter ladle bottom blowing argon control method according to an embodiment of the present invention is shown;

[0037] Figure 3 An example diagram of a human-machine interface of a bottom blowing argon control method according to an embodiment of the present invention is shown;

[0038] Figure 4 A schematic diagram of a converter ladle bottom blowing argon control device according to an embodiment of the present invention is shown;

[0039] Figure 5 A schematic diagram of an electronic device according to an embodiment of the present invention is shown;

[0040] Figure 6 A schematic diagram of a storage medium according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0041] In order to make the technical personnel in the technical field to which the present application belongs more clearly understand the present application, the technical solution of the present application is described in detail by specific embodiments in conjunction with the accompanying drawings. Throughout the specification, unless otherwise specified, the terms used herein should be understood as the meanings commonly used in the art. Therefore, unless otherwise defined, all technical and scientific terms used herein have the same meanings as the general understanding of the technical personnel in the field to which the present invention belongs. If there is a contradiction, this specification takes precedence. Unless otherwise specified, the various equipment used in the present invention, etc., can be purchased from the market or can be prepared by existing methods.

[0042] In order to solve the technical problem that the current bottom blowing of argon in the converter ladle is operated by manual experience, different people are uncertain about the control process of the bottom blowing of argon, and argon is wasted, firstly, in an optional embodiment, please refer to Figure 1 , provides a control method for argon blowing at the bottom of a converter ladle, which can be applied to a PLC control system for steelmaking, including steps S101 to S104, as follows:

[0043] S101: Obtaining the nitrogen content of molten steel produced in a converter.

[0044] Specifically, the nitrogen content of the converter molten steel before tapping can be obtained by taking a molten steel sample. The nitrogen content of the converter molten steel issued by the steelmaking production management system can also be received through the steelmaking PLC control system.

[0045] S102: Determine the type of the molten steel produced in the converter according to the nitrogen content.

[0046] In this embodiment, the converter smelting steel can be divided into ordinary steel and low nitrogen steel according to the nitrogen content. The nitrogen content limit of ordinary steel and low nitrogen steel can be determined at 50ppm (0.0005%), that is, if the nitrogen content in the converter steel is ≥50ppm, the steel is classified as ordinary steel; if the nitrogen content in the converter steel is <50ppm, the steel is classified as low nitrogen steel. During control, the Steel_style of ordinary steel can be assigned a value of 1, and the Steel_style of low nitrogen steel can be assigned a value of 2, so as to facilitate the PLC control system to control the flow rate of bottom blowing argon.

[0047] S103: when the converter is tapping steel, obtaining the weight of the molten steel in the converter ladle;

[0048] When the converter is tapping steel, the converter body is tilted, and the molten steel from the converter is poured into the converter ladle from the tapping port, and deoxidizer is added to deoxidize and adjust the composition. The converter ladle is set on the molten steel car, and the weight of the molten steel in the converter ladle can be measured in real time.

[0049] S104: determining a bottom blowing argon set flow rate of the converter ladle according to the type and the weight of the molten steel, and performing closed-loop control based on the bottom blowing argon set flow rate.

[0050] Specifically, the bottom blowing argon set flow rate of the converter ladle is determined comprehensively according to the type of molten steel smelted in the converter and the weight of the molten steel in the converter ladle, and closed-loop control is performed with the bottom blowing argon set flow rate as the target value, which can effectively reduce the labor intensity of manually controlling the bottom blowing of argon in the converter ladle, reduce the waste of argon caused by human control factors and the unqualified molten steel quality caused by improper argon blowing; on the other hand, the quantitative control function of the bottom blowing argon can standardize the bottom blowing time and improve the output of the production line.

[0051] Specifically, when the nitrogen content of the molten steel produced by the converter shows that it is ordinary steel (ie, Steel_style=1), the bottom blowing argon set flow rate of the converter ladle can be set according to the following scheme:

[0052] 1) When the converter is tapping and the converter angle is detected to be less than -15°, open the nitrogen shut-off valve and the argon shut-off valve FV_Ar, and determine that the bottom blowing argon set flow rate Ar_Flow is 75-125m 3 / h (cubic meters / hour), preferably 100m 3 / h. The converter angle here is the actual converter inclination Angle_Act, and the initial angle of the converter before steelmaking is 0°. After determining the bottom blowing argon set flow rate, the actual argon blowing amount of the argon regulating valve FV1 is automatically adjusted according to the bottom blowing argon set flow rate Ar_Flow.

[0053] 2) When the converter is tapping steel, the ladle is gaining weight; if the weight of the molten steel is greater than or equal to 80 tons and less than 150 tons, that is, the weight of the molten steel in the converter ladle is within the range of [80t, 150t), determine the bottom blowing argon set flow rate Ar_Flow to 750-850m 3 / h, preferably 800m 3 / h. In this stage, the argon regulating valve FV1 is automatically adjusted according to the bottom blowing argon set flow rate Ar_Flow.

[0054] 3) When the converter is tapping, if the weight of the molten steel is greater than or equal to 150 tons and less than 200 tons, that is, the weight of the molten steel in the converter ladle is within the range of [150t, 200t), the bottom blowing argon set flow rate Ar_Flow is determined to be 1550~1650m 3 / h, preferably 1600m 3 / h. In this stage, the argon regulating valve FV1 is automatically adjusted according to the bottom blowing argon set flow rate Ar_Flow.

[0055] 4) When the converter is tapping steel, if the weight of the molten steel is greater than or equal to 200 tons, the bottom blowing argon set flow rate Ar_Flow is determined to be 75-125m 3 / h, preferably 100m 3 / h.

[0056] 5) When the converter is tapping, if the weight of the molten steel is greater than or equal to 200 tons and the distance between the molten steel car and the converter is less than 60000mm, the argon cut-off valve FV_Ar is closed, the bottom blowing argon set flow Ar_Flow is reset to zero, the argon regulating valve FV1 is closed, and the bottom blowing of the converter ladle is automatically terminated. Among them, the distance between the molten steel car refers to the distance between the molten steel car carrying the converter ladle and the specified point. At the specified point, such as the opposite wall of the converter tapping position, a laser rangefinder is installed to detect the distance between the molten steel car and the converter, and the detection value of the distance between the molten steel car is sent to the PLC control system.

[0057] In general, when the molten steel is ordinary steel, the converter tilting angle is detected to be <-15° during the blowing process.

[0058] When the argon blowing is started, the bottom argon blowing of the converter ladle is started, and the argon blowing flow rate is automatically changed according to the weight of the molten steel in the converter ladle; and the bottom argon blowing is automatically stopped when the distance from the molten steel car is <60000mm.

[0059] If the nitrogen content of the molten steel produced in the converter shows that it is low-nitrogen steel (i.e. Steel_style=2), the bottom blowing argon set flow rate of the converter ladle can be set according to the following scheme:

[0060] 1) When the converter is tapping and the distance between the molten steel car and Ladle_car is greater than 30000mm, open the argon cut-off valve FV_Ar and determine the bottom blowing argon set flow rate Ar_Flow to 75~125m 3 / h, preferably 100m 3 / h. At this stage, the actual argon blowing amount of the argon regulating valve FV1 is automatically adjusted according to the bottom blowing argon set flow rate Ar_Flow.

[0061] 2) When the converter is tapping steel, the converter ladle continues to increase in weight. If the weight of the molten steel is greater than or equal to 80 tons and less than 200 tons, that is, the weight of the molten steel in the converter ladle is within the range of [80t, 200t), the bottom blowing argon set flow rate Ar_Flow is determined to be 950~1050m 3 / h, the preferred value is 1000m 3 / h. At this stage, the actual argon blowing amount of the argon regulating valve FV1 is automatically adjusted according to the bottom blowing argon set flow rate Ar_Flow.

[0062] 3) When the converter is tapping steel, if the weight of the molten steel is greater than or equal to 200 tons, the argon shut-off valve FV_Ar is closed, the bottom blowing argon set flow Ar_Flow is reset to zero, the argon regulating valve FV1 is closed, and the bottom blowing argon of this furnace is automatically adjusted to end automatically.

[0063] In general, when steel is tapped from the converter, the bottom argon blowing mode is automatically started for low-nitrogen steel according to the distance from the molten steel car. When the distance from the molten steel car is >30000mm, the bottom blowing is started and the argon blowing flow rate is automatically adjusted according to the weight of the molten steel in the converter ladle; the bottom argon blowing ends when the ladle weight is >200t or the converter slide is closed.

[0064] The detailed logic control diagram of the above scheme can be found in Figure 2 ,exist Figure 2 In the figure, Steel_style is the steel type mark (=1 for ordinary steel, =2 for low nitrogen steel), Ar_Flow is the bottom blowing argon set flow rate, Weight_steel is the weight of molten steel in the converter ladle, Ladle_car is the distance from the molten steel car, FV is the argon shut-off valve, and FV1 is the argon regulating valve.

[0065] In actual control, a human-machine interface can be developed on the host computer to visualize the above control process so as to view the automatic control status of bottom blowing argon in real time, such as Figure 3 shown.

[0066] The method for controlling argon blowing at the bottom of the converter ladle provided in the present embodiment determines the type of molten steel in the converter by detecting the nitrogen content of the molten steel in the converter, and then quantitatively determines the set flow rate of argon blowing at the bottom of the converter ladle according to the type of molten steel and the weight of the molten steel in the converter ladle during the steel tapping process, and performs closed-loop control based on the set flow rate of argon blowing at the bottom. This overcomes the problems of uncertain start timing and uncertain argon blowing amount of the bottom argon blowing in manual control of the bottom argon blowing of the converter ladle based on experience, is conducive to saving argon flow, and avoids the problem of low molten steel temperature in the converter ladle due to excessive argon blowing.

[0067] Furthermore, through the distance between the molten steel car and the tilting angle of the converter, combined with the type of molten steel issued, the bottom argon blowing is automatically started and stopped, and the bottom blowing argon flow rate is automatically set according to the weight of the molten steel and automatically adjusted according to the flow setting, thereby realizing the automatic stirring function of the molten steel in the converter ladle to make it more uniform, and being able to automatically stop the bottom blowing process, saving argon usage, without the need for manual intervention and manual operation, realizing unmanned operation of bottom argon blowing, achieving the goal of unmanned operation of the operating table behind the furnace, and providing support for intelligent steelmaking.

[0068] In order to verify the effect of automatic control of argon blowing at the bottom of the converter ladle, the total argon consumption in the first 100 heats of the present embodiment and when the bottom argon blowing was manually controlled was counted: 3850m 3 , and the total argon consumption of 100 heats after applying the scheme of this embodiment and using automatic control of bottom blowing argon: 2887m 3 It can be seen that after applying the solution provided in this embodiment, the argon consumption of the bottom blowing argon of the converter ladle is reduced by 25%, which effectively reduces the production cost of the bottom blowing argon.

[0069] In the second aspect, based on the same inventive concept, in another optional embodiment, please refer to Figure 4 , provides a control device for argon blowing at the bottom of a converter ladle, comprising:

[0070] The acquisition module 410 is used to acquire the nitrogen content of the molten steel in the converter and the weight of the molten steel in the converter ladle when the converter is tapping steel;

[0071] A determination module 420 is used to determine the type of the molten steel produced by the converter according to the nitrogen content;

[0072] The control module 430 is used to determine the bottom blowing argon set flow rate of the converter ladle according to the type and the weight of the molten steel, and perform closed-loop control based on the bottom blowing argon set flow rate.

[0073] Optionally, the type is ordinary steel; the control module 430 is used to:

[0074] When the converter is tapping steel, if the weight of the molten steel is greater than or equal to 80 tons and less than 150 tons, the bottom blowing argon setting flow rate is determined to be 750-850m 3 / h;

[0075] When the converter is tapping steel, if the weight of the molten steel is greater than or equal to 150 tons and less than 200 tons, the bottom blowing argon setting flow rate is determined to be 1550-1650m 3 / h;

[0076] When the converter is tapping steel, if the weight of the molten steel is greater than or equal to 200 tons, the bottom blowing argon setting flow rate is determined to be 75-125m 3 / h.

[0077] Optionally, the control module 430 is further configured to:

[0078] When the converter is tapping and the converter angle is detected to be less than -15°, the nitrogen shut-off valve and the argon shut-off valve are opened to determine the bottom blowing argon set flow rate to be 75-125m 3 / h.

[0079] Optionally, the control module 430 is further configured to:

[0080] When the converter is tapping steel, if the weight of the molten steel is greater than or equal to 200 tons and the distance between the molten steel car and the molten steel car is less than 60,000 mm, the argon shut-off valve is closed and the bottom blowing argon set flow rate is reset to zero.

[0081] Optionally, the type is low nitrogen steel; the control module 30 is used for:

[0082] When the converter is tapping steel, if the weight of the molten steel is greater than or equal to 80 tons and less than 200 tons, the bottom blowing argon setting flow rate is determined to be 950-1050m 3 / h.

[0083] Optionally, the control module 430 is further configured to:

[0084] When the converter is tapping and the distance between the molten steel car and the converter is greater than 30000mm, open the argon cut-off valve and set the bottom blowing argon flow rate to 75-125m 3 / h.

[0085] Optionally, the control module 430 is further configured to:

[0086] When the converter is tapping steel, if the weight of the molten steel is greater than or equal to 200 tons, the argon shut-off valve is closed and the bottom blowing argon set flow rate is reset to zero.

[0087] In a third aspect, based on the same inventive concept as the above-mentioned embodiment, in another optional embodiment, as Figure 5 As shown, an electronic device 500 is provided, including a processor 520 and a memory 510, wherein the memory 510 is coupled to the processor 520, and the memory 510 stores a computer program 511, and when the computer program 511 is executed by the processor 520, the electronic device 500 executes the steps of the control method described in the aforementioned embodiment.

[0088] The electronic device may be a programmable logic controller PLC.

[0089] Based on the same inventive concept as the above-mentioned embodiment, in another optional embodiment, as Figure 6As shown, a computer-readable storage medium 600 is provided, on which a computer program 611 is stored. When the program is executed by a processor, the steps of the control method in the aforementioned embodiment are performed.

[0090] Through one or more embodiments of the present invention, the present invention has the following beneficial effects or advantages:

[0091] The invention provides a method for controlling argon blowing at the bottom of a converter ladle. The method determines the type of molten steel in the converter according to the nitrogen content of the molten steel smelted in the converter, and then quantitatively determines the set flow rate of the bottom argon blowing of the converter ladle according to the type of the molten steel and the weight of the molten steel in the converter ladle during steel tapping, and performs closed-loop control based on the set flow rate of the bottom argon blowing. In this way, the problems of uncertain start timing and argon blowing amount of the bottom argon blowing of the converter ladle, which exist in manual experience-based control of the bottom argon blowing of the converter ladle, are overcome, and the argon flow rate is saved, and the problem of low molten steel temperature in the converter ladle due to excessive argon blowing is avoided.

[0092] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0093] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for controlling argon blowing at the bottom of a converter ladle, characterized in that: The control method comprises: Obtain the nitrogen content of molten steel in converter smelting; According to the nitrogen content, the type of the converter smelting molten steel is determined; if the nitrogen content in the converter molten steel is ≥50ppm, the molten steel is classified as ordinary steel; if the nitrogen content in the converter molten steel is <50ppm, the molten steel is classified as low-nitrogen steel; When the converter is tapping steel, the weight of the molten steel in the converter ladle is obtained; Determining a bottom blowing argon set flow rate of a converter ladle according to the type and the weight of the molten steel, and performing closed-loop control based on the bottom blowing argon set flow rate; When the type is ordinary steel; determining the bottom blowing argon setting flow rate of the converter ladle according to the type and the weight of the molten steel includes: 1) When the converter is tapping and the converter angle is detected to be less than -15°, open the nitrogen shut-off valve and the argon shut-off valve, and determine that the bottom blowing argon setting flow rate is 75~125m 3 / h; 2) When the converter is tapping steel, if the weight of the molten steel is greater than or equal to 80 tons and less than 150 tons, the bottom blowing argon setting flow rate is determined to be 750~850m 3 / h; 3) When the converter is tapping steel, if the weight of the molten steel is greater than or equal to 150 tons and less than 200 tons, the bottom blowing argon setting flow rate is determined to be 1550~1650m 3 / h; 4) When the converter is tapping steel, if the weight of the molten steel is greater than or equal to 200 tons, the bottom blowing argon setting flow rate is determined to be 75~125m 3 / h; 5) When the converter is tapping steel, if the weight of the molten steel is greater than or equal to 200 tons and the distance between the molten steel car and the molten steel car is less than 60,000 mm, the argon shut-off valve is closed and the bottom blowing argon set flow rate is reset to zero; When the type is low nitrogen steel; determining the bottom blowing argon setting flow rate of the converter ladle according to the type and the weight of the molten steel includes: 1) When the converter is tapping and the distance between the molten steel car and the converter is greater than 30000mm, open the argon shut-off valve and set the bottom blowing argon flow rate to 75~125m 3 / h; 2) When the converter is tapping steel, if the weight of the molten steel is greater than or equal to 80 tons and less than 200 tons, the bottom blowing argon setting flow rate is determined to be 950~1050m 3 / h; 3) When the converter is tapping steel, if the weight of the molten steel is greater than or equal to 200 tons, the argon shut-off valve is closed and the bottom blowing argon set flow rate is reset to zero.

2. A control device for argon blowing at the bottom of a converter ladle, the control device being used to implement the steps of the control method as claimed in claim 1, characterized in that: The control device comprises: An acquisition module is used to acquire the nitrogen content of the molten steel in the converter and the weight of the molten steel in the converter ladle when the converter is tapping steel; A determination module, used to determine the type of the molten steel produced by the converter according to the nitrogen content; A control module is used to determine the bottom blowing argon set flow rate of the converter ladle according to the type and the weight of the molten steel, and perform closed-loop control based on the bottom blowing argon set flow rate.

3. An electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the control method according to claim 1 are implemented.

4. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the control method according to claim 1 are implemented.

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