A side-blown device and a side-blown method for converter smelting

Abstract

This application discloses a side-blowing device and method for converter smelting. The side-blowing device includes a powder spray gun, a position adjustment mechanism, a powder supply unit, a vision sensing unit, and a control unit. The powder spray gun is used to spray metallurgical powder into the converter molten pool. The position adjustment mechanism is connected to the spray gun drive to regulate its spatial position. The powder supply unit is connected to the spray gun and is responsible for powder storage and transportation. The vision sensing unit is used to collect image information of the tapping area. The control unit is communicatively connected to the other three components, receives image information, identifies the spatial coordinates of the tapping area, generates positioning commands to drive the position adjustment mechanism to adjust the spray gun to the preset spraying position, and simultaneously regulates the mass flow rate of powder and carrier gas. Through the coordinated operation of multiple units, the device achieves accurate identification of the tapping area and automatic positioning of the spray gun, simplifying the equipment structure, improving the utilization rate of metallurgical powder, and possessing comprehensive advantages such as equipment durability, operational safety, resource recycling, and low-carbon environmental protection.

Description

Technical Field

[0001] This application relates to the field of metallurgical technology, specifically to a side-blowing device and smelting method for converter smelting. Background Technology

[0002] As a core link in modern steel production, converter smelting is driven by a focus on high efficiency, low cost, and green development. Various injection technologies are applied to the converter process to optimize smelting results. Existing technologies mainly develop along two paths: one is to open spray lance holes in the molten pool area on the converter sidewall, directly injecting CO2 or various powders into the molten pool through the sidewall, aiming to enhance the smelting process by utilizing the physicochemical effects of the gas or powder; the other is to adopt an independent injection system separate from the oxygen lance, injecting slagging agents, pulverized coal, or furnace filler material into the furnace through a liftable or extendable powder injection lance, in order to achieve functions such as slag optimization, increased gas production, or slag splashing for furnace protection.

[0003] However, existing side-blowing powder injection technology still has significant limitations in application. First, opening spray gun holes in the converter sidewall poses a challenge to the structural integrity of the furnace shell. Stress concentration easily forms in the hole edge area under periodic tilting and temperature fluctuations, accelerating furnace shell fatigue damage and affecting equipment lifespan. Second, the independently set powder injection system requires a dedicated lifting mechanism and cooling water protection, complicating the equipment around the furnace opening. This not only increases investment and maintenance costs but also places extremely high demands on mechanical reliability during the frequent tilting of the converter, requiring repeated advance and retreat alignment of the spray gun. More importantly, existing powder injection guns generally rely on circulating cooling water for thermal protection. Insufficient cooling efficiency or water leakage can lead to localized overheating and damage to the equipment, increasing production risks. Therefore, how to achieve precise powder injection while simplifying equipment structure, reducing reliance on cooling, and improving operational safety has become a pressing technical problem to be solved in this field. Summary of the Invention

[0004] The purpose of this application is to provide a side-blowing device and method for converter smelting, in order to solve the problems in existing converter side-blowing technology, such as mechanical erosion and thermal burn-off of furnace lining caused by insufficient positioning accuracy of spray gun, reduced furnace structural integrity and increased maintenance frequency due to furnace wall openings, and difficulty in spraying metallurgical powder into the target area according to the actual state of the molten pool during the blowing process, thereby affecting the stability of metallurgical effect.

[0005] To achieve the above objectives, this application adopts the following technical solution: The first aspect of this application provides a side-blowing device for converter smelting, comprising: Powder spray gun, used to spray metallurgical powder into the converter molten pool; The position adjustment mechanism is connected to the powder spray gun drive and is used to adjust the spatial position of the powder spray gun. The powder supply unit is connected to the powder spray gun and is used to store metallurgical powder and supply metallurgical powder to the powder spray gun. The visual sensing unit is used to acquire image information including the area of ​​the converter tapping opening; The control unit is communicatively connected to the position adjustment mechanism, the powder supply unit, and the vision sensing unit. The control unit receives image information acquired by the vision sensing unit, identifies the spatial coordinates of the steel outlet, generates positioning commands, controls the position adjustment mechanism to adjust the powder spray gun to the preset spraying position, and synchronously regulates the metallurgical powder flow rate and carrier gas mass flow rate output by the powder supply unit.

[0006] Furthermore, the powder supply unit includes a carrier gas supply unit and a powder storage unit; the carrier gas supply unit is used to provide a gas medium for conveying the metallurgical powder in the powder storage unit. The powder storage unit includes a powder storage tank, which is connected to a powder spray gun via a pipeline, and a powder mass flow rate control device is installed on the pipeline at the outlet of the powder storage tank. The carrier gas supply unit includes a carrier gas storage tank, which is connected to a powder storage tank via a pipeline. A gas mass flow rate control device is installed on the pipeline between the carrier gas storage tank and the powder storage tank. The control unit is communicatively connected to the powder mass flow rate control device and the gas mass flow rate control device.

[0007] Furthermore, multiple powder storage units are arranged in parallel, and each powder storage tank stores metallurgical powders of different types or particle sizes; each powder storage unit collects metallurgical powders into the powder spray gun through pipelines. The control unit is equipped with a module that can independently control the start-up, shutdown, and sequential switching of each powder storage unit.

[0008] Furthermore, the gas medium provided by the carrier gas supply unit includes one of the following: inert gas, carbon dioxide, or a mixture of industrial by-product coal gas and combustion exhaust gas after dust removal and purification treatment.

[0009] Furthermore, the end of the position adjustment mechanism connected to the powder spray gun is provided with a movable joint connector, which enables the powder spray gun to deflect at an angle in the vertical plane and the horizontal plane.

[0010] Furthermore, the visual sensing unit includes a dual-mode image acquisition unit capable of both infrared and visible light imaging. The control unit is equipped with an image recognition algorithm to analyze the acquired image information to identify the outline and spatial coordinates of the steel outlet.

[0011] Furthermore, a thermal shock resistant insulation layer is provided around the spraying end of the powder spray gun. The thermal shock resistant insulation layer includes one of the following: aluminum silicate fiber insulation sleeve, plasma sprayed high-temperature ceramic coating, or cast refractory material covering layer. The powder spray gun is 1.5 to 2.5 m long, and the nozzle at the spray end of the powder spray gun is a dispersion type nozzle with multiple discrete nozzles, each nozzle having a diameter of 5 to 20 mm.

[0012] Furthermore, the cumulative volumetric particle size distribution D50 of the metallurgical powder is between 0.5 and 3.0 mm, and the metallurgical powder includes at least one of coal-based carbon powder, biomass pyrolysis carbon powder, slag-forming agent, slag-forming agent, and furnace filler material.

[0013] A second aspect of this application provides a side-blowing method for converter smelting, employing the aforementioned side-blowing device for converter smelting, the side-blowing method comprising: During the process window when the converter is in the blowing or slag splashing stage, the vision sensing unit and position adjustment mechanism are activated. The vision sensing unit collects image information of the converter tapping area and transmits it to the control unit. The control unit identifies and analyzes the spatial coordinates of the converter tapping area and generates a positioning command. At the same time, according to the smelting target, the injection parameters are set by the control unit. The injection parameters include the type of metallurgical powder, the mass flow rate of the carrier gas, the injection rate, and the insertion depth and injection time of the powder spray gun. The position adjustment mechanism receives the positioning command from the control unit and adjusts the powder spray gun to the preset spraying position; at the same time, it starts the powder supply unit and sprays according to the preset spraying parameters. After the preset spraying time is reached, the control unit shuts down the powder supply unit and controls the position adjustment mechanism to reset the powder spray gun.

[0014] Furthermore, the mapping relationship between the smelting target and the injection parameters includes at least one of the following preset schemes: When the metallurgical objective is to promote slag formation, dephosphorization, and inhibit slag re-drying, a slag-forming agent is selected as the metallurgical powder, and the injection parameters are: carrier gas mass flow rate of 2.5~3.5 Nm³. 3 / (t·min), the blowing rate is 0.2~1.0 kg / (t·min), the insertion depth of the powder spray gun is 30~70 cm, and the blowing time is 2~5 min; When the metallurgical objective is to enhance the slag-gold interface reaction, a slag-forming agent is selected as the metallurgical powder, and the injection parameters are: carrier gas mass flow rate of 3.5~4.5 Nm³. 3 / (t·min), the blowing rate is 0.5~2.0 kg / (t·min), the insertion depth of the powder spray gun (1) is 30~70 cm, and the blowing time is 6~12 min; When the metallurgical objective is to increase the CO concentration and calorific value in converter gas, pulverized coal is selected as the metallurgical agent, and the injection parameters are: carrier gas mass flow rate of 1.5~2.0 Nm³. 3 / (t·min), the blowing rate is 0.1~0.5 kg / (t·min), the insertion depth of the powder spray gun (1) is 30~50 cm, and the blowing time is 5~8 min; When the metallurgical objective is to improve converter gas quality using biomass carbon resources, biomass char powder is selected as the metallurgical powder, and the injection parameters are: carrier gas mass flow rate of 1.5~2.0 Nm³. 3 / (t·min), the blowing rate is 0.5~1.0 kg / (t·min), the insertion depth of the powder spray gun (1) is 30~50 cm, and the blowing time is 5~8 min; When the furnace is in the slag splashing protection stage and the metallurgical goal is to repair the furnace lining, the furnace repair material is selected as the metallurgical powder, and the injection parameters are: carrier gas mass flow rate of 3.0~3.5 Nm³. 3 / (t·min), the blowing rate is 1.0~1.5 kg / (t·min), the insertion depth of the powder spray gun (1) is 40~60 cm, and the blowing time is 2~4 min.

[0015] Compared with the prior art, this application has the following beneficial effects: The side-blowing device for converter smelting provided by this invention achieves accurate identification of the converter tapping area and automatic positioning of the spray gun by setting a visual sensing unit above the tapping port and coordinating it with the control unit, position adjustment mechanism, and powder supply unit. First, this device eliminates the need for spray gun holes in the converter sidewall, avoiding furnace damage caused by openings and significantly improving the service life and operational safety of the converter. Second, through the combination of visual recognition and automatic control, the device can accurately and promptly deliver the powder spray gun to the preset blowing position according to the actual state of the molten pool, overcoming the problems of poor positioning accuracy and delayed response caused by traditional independent powder spraying systems that rely on manual observation and repeated forward and backward alignment. This device simplifies the equipment structure, reduces reliance on cooling water, and achieves efficient utilization of metallurgical powder, combining the advantages of durable equipment, safe operation, resource recycling, and low-carbon environmental protection.

[0016] Furthermore, the parallel powder storage unit design allows for the flexible injection of various materials such as pulverized coal, biochar, slag-forming agents, slag-forming agents, and furnace filler materials, and can be matched according to the objectives of different smelting stages.

[0017] Furthermore, the spray nozzle tip of the side-blowing spray gun is equipped with a thermal shock resistant and heat-insulating structure, eliminating the need for additional circulating water cooling and avoiding the risk of water leakage.

[0018] The side-blowing method for converter smelting provided by this invention, relying on the aforementioned device, ensures the accuracy and timeliness of the spray gun positioning during the blowing or slag splashing process window through a control unit and a visual sensing unit. Then, the required metallurgical powder is selected, and based on key parameters such as the carrier gas mass flow rate, blowing rate, insertion depth, and blowing time preset according to the smelting target, the control unit synchronously coordinates the position adjustment and powder supply, allowing the powder to enter the molten pool reaction zone. This significantly improves the calorific value of the converter gas and enhances the efficiency of achieving process objectives such as slag formation, dephosphorization, carbonization, or slag splashing for furnace protection. After blowing is completed, the system automatically resets, requiring no manual intervention throughout the process. This greatly reduces the labor intensity and risk of operator error, providing reliable technical support for the development of converter smelting towards high efficiency, automation, and green practices. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the side-blowing device for converter smelting provided in this application; In the diagram, 1 is the powder spray gun; 2 is the position adjustment mechanism; 3 is the powder storage tank; 4 is the carrier gas storage tank; 5 is the vision sensing unit; 6 is the control unit; 7 is the powder mass flow rate control device; and 8 is the carrier gas flow rate control device. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] In the converter smelting process, the periodic tilting process of "forward tilting charging - upright smelting - backward tilting tapping" is required. The independent powder spraying gun needs to repeatedly perform forward and backward positioning operations. During this process, the furnace body usually has a deviation of ±3°. It is difficult for the powder spraying gun to accurately enter the furnace body through the tapping port. Long-term repeated forward and backward operations can easily damage the furnace body.

[0023] Based on this, such as Figure 1 As shown, a specific embodiment of this application provides a side-blowing device for converter smelting, comprising: Powder spray gun 1, used to spray metallurgical powder into the converter molten pool; The position adjustment mechanism 2 is driven and connected to the powder spray gun 1, and is used to adjust the spatial position of the powder spray gun 1; The powder supply unit is connected to the powder spray gun 1 and is used to store metallurgical powder and supply metallurgical powder and carrier gas to the powder spray gun 1. The visual sensing unit 5 is used to acquire image information including the steel outlet area; The control unit 6 is communicatively connected to the position adjustment mechanism 2, the powder supply unit, and the vision sensing unit 5, respectively. The control unit 6 is used to receive image information acquired by the vision sensing unit 5, identify the spatial coordinates of the steel nozzle, generate positioning commands, control the position adjustment mechanism 2 to adjust the spatial posture of the powder spray gun 1 to the preset spraying position, and synchronously regulate the metallurgical powder flow rate and carrier gas mass flow rate output by the powder supply unit.

[0024] In some specific embodiments of this application, a thermal shock resistant insulation layer is provided around the spraying end of the powder spray gun 1. This thermal shock resistant insulation layer includes one of the following: an aluminum silicate fiber insulation sleeve, a plasma-sprayed high-temperature ceramic coating, or a cast-molded refractory material coating. This thermal shock resistant insulation layer eliminates the need for water cooling, thus avoiding the risk of leakage. The length of the powder spray gun 1 is 1.5~2.5 m, ensuring a reasonable insertion depth into the converter. The nozzle at the spraying end of the powder spray gun 1 is a dispersion nozzle with multiple discrete nozzle holes, each with a diameter of 5~20 mm. The dispersion nozzle ensures that the metallurgical powder is uniformly dispersed into the converter, improving the metallurgical reaction effect. In some embodiments, the powder spray gun 1 is made of high-temperature resistant alloy tubing, capable of withstanding the high temperatures and molten slag splashes in the converter tapping area.

[0025] In some specific embodiments of this application, the position adjustment mechanism 2 is installed on the load-bearing steel structure at the top of the converter's rear platform. The position adjustment mechanism 2 is internally equipped with a servo drive motor and a transmission screw. The control unit 6 is communicatively connected to the servo drive motor of the position adjustment mechanism 2 and issues positioning commands to the position adjustment mechanism 2. Upon receiving the positioning command, the servo drive motor inside the position adjustment mechanism 2 drives the transmission screw to move, transporting the powder spray gun 1 to the end of the position adjustment mechanism 2 near the furnace body. The end of the position adjustment mechanism 2 near the furnace body has a movable joint connector, enabling the powder spray gun 1 to deflect at an angle in both the vertical and horizontal planes. After smelting is completed, the control unit 6 controls the position adjustment mechanism 2 to reset the powder spray gun 1.

[0026] In some specific embodiments of this application, the powder supply unit includes a carrier gas supply unit and a powder storage unit. The carrier gas supply unit provides a gaseous medium for transporting metallurgical powder within the powder storage unit. The powder storage unit includes a powder storage tank 3, which is connected to the powder spray gun 1 via a pipeline. A powder mass flow rate control device 7 is installed on the pipeline at the outlet of the powder storage tank 3. The carrier gas supply unit includes a carrier gas storage tank 4, which is connected to the powder storage tank 3 via a pipeline. A gas mass flow rate control device 8 is installed on the pipeline between the carrier gas storage tank 4 and the powder storage tank 3. The control unit 6 is communicatively connected to the powder mass flow rate control device 7 and the gas mass flow rate control device 8, and controls the opening, closing, and adjustment of the powder mass flow rate control device 7 and the gas mass flow rate control device 8 according to the smelting target, thereby controlling the flow rate of the metallurgical powder and the carrier gas. The powder supply unit achieves quantitative control of the mass flow rate of the powder and the carrier gas, avoiding uneven spraying smelting problems caused by flow fluctuations.

[0027] The powder storage tank 3 is a pressurized fluidized bed sealed storage tank with an inlet. A pressure safety valve is installed on the inlet pipeline of the powder storage tank 3. After the carrier gas is introduced, the metallurgical powder inside the tank can be fluidized. The pipeline uses high-temperature and high-pressure resistant tubing. Both the powder mass flow control device 7 and the gas mass flow control device 8 employ high-precision closed-loop mass flow controllers. Specifically, the powder mass flow control device 7 uses a combination of a force-type powder mass flow meter and an electric regulating valve, while the gas mass flow control device 8 uses a thermal gas mass flow controller. The powder mass flow control device 7 and the gas mass flow control device 8 can achieve real-time, precise adjustment and closed-loop feedback control of the powder delivery flow rate and the powder carrier gas.

[0028] Multiple powder storage units are arranged in parallel, with each powder storage tank 3 storing metallurgical powders of different types or particle sizes. Each powder storage unit supplies metallurgical powders to the powder spray gun 1 via pipelines. The control unit 6 contains modules that can independently control the start-up, shutdown, and sequential switching of each powder storage unit. The cumulative particle size distribution D50 of the metallurgical powders stored in the powder storage tanks 3 is between 0.5 and 3.0 mm, which can adapt to the needs of side-blown pneumatic conveying and molten pool smelting, ensuring smooth powder delivery while guaranteeing the smelting reaction rate. The metallurgical powders include at least one of coal-based carbon powder, biomass pyrolysis carbon powder, slag-forming agent, slag-forming agent, and furnace filler material. The types of metallurgical powders can meet the smelting needs of improving the calorific value of converter gas, promoting slag formation, dephosphorization, carbonization, and furnace protection. The parallel design and individual control of multiple powder storage units enable the separate storage and on-demand injection of various metallurgical powders. Multiple side-blowing operations for different smelting objectives in converter smelting can be completed without manual powder replacement, significantly improving smelting efficiency.

[0029] The carrier gas supply unit provides a carrier gas medium including inert gas, carbon dioxide, or a mixture of industrial by-product coal gas and combustion exhaust gas after dust removal and purification treatment, thereby realizing the recycling of carrier gas resources and the in-plant consumption of CO2 and improving the economic efficiency of converter smelting.

[0030] In some specific embodiments of this application, the visual sensing unit 5 includes a dual-mode image acquisition device with infrared imaging and visible light imaging. Infrared imaging can clearly capture image information of the converter tapping opening, avoiding the influence of smoke and dust on image acquisition, while visible light imaging can assist in imaging and ensure the accuracy of the acquired image information. In a specific embodiment, the visual sensing unit 5 is installed on the load-bearing steel structure at the top of the converter rear platform, located diagonally above the tapping opening, and can acquire complete image information including the converter tapping opening area.

[0031] The control unit 6 is equipped with an image recognition algorithm to analyze the acquired image information to identify the outline and spatial coordinates of the steel outlet. Specifically, the acquired steel outlet image information is first preprocessed and outline segmented to extract the steel outlet feature points and calculate their pixel coordinates; then, through camera calibration and hand-eye calibration, the pixel coordinates are converted into three-dimensional spatial coordinates, and finally, the accurate spatial position information of the steel outlet is output, providing data support for the positioning of the spray gun.

[0032] This application also provides a side-blowing method for converter smelting using the above-mentioned side-blowing device, comprising the following steps: Before using the aforementioned side-blowing device for converter smelting, first determine the pressure sealing and functional integrity of all pipelines and connecting components of the side-blowing device; then confirm the type and quantity of metallurgical powder in powder storage tank 3; and ensure the safety and stability of the smelting process.

[0033] During the process window when the converter is in the blowing or slag splashing stage, the vision sensing unit 5 and the position adjustment mechanism 2 are activated. The vision sensing unit 5 collects image information of the converter tapping area and transmits it to the control unit 6. The control unit 6 identifies and analyzes the spatial coordinates of the converter tapping area and generates a positioning command. At the same time, according to the smelting target, the injection parameters are set by the control unit 6. The injection parameters include the type of metallurgical powder, the mass flow rate of the carrier gas, the injection rate, and the insertion depth and injection time of the powder spray gun 1. The position adjustment mechanism 2 receives the positioning command from the control unit 6 and adjusts the powder spray gun 1 to the preset spraying position; at the same time, it starts the powder supply unit and sprays according to the preset spraying parameters. After the preset spraying time is reached, the control unit 6 controls the powder supply unit to shut down and controls the position adjustment mechanism 2 to reset the powder spray gun 1.

[0034] In some specific embodiments of this application, the mapping relationship between the smelting target and the injection parameters includes at least one of the following preset schemes: When the metallurgical objective is to promote slag formation, dephosphorization, and inhibit slag re-drying, a slag-forming agent is selected as the metallurgical powder, and the injection parameters are: carrier gas mass flow rate of 2.5~3.5 Nm³. 3 / (t·min), the blowing rate is 0.2~1.0 kg / (t·min), the insertion depth of powder spray gun 1 is 30~70 cm, and the blowing time is 2~5 min; When the metallurgical objective is to enhance the slag-gold interface reaction, a slag-forming agent is selected as the metallurgical powder, and the injection parameters are: carrier gas mass flow rate of 3.5~4.5 Nm³. 3 / (t·min), the blowing rate is 0.5~2.0 kg / (t·min), the insertion depth of powder spray gun 1 is 30~70 cm, and the blowing time is 6~12 min; When the metallurgical objective is to increase the CO concentration and calorific value in converter gas, pulverized coal is selected as the metallurgical agent, and the injection parameters are: carrier gas mass flow rate of 1.5~2.0 Nm³. 3 / (t·min), the blowing rate is 0.1~0.5 kg / (t·min), the insertion depth of powder spray gun 1 is 30~50 cm, and the blowing time is 5~8 min; When the metallurgical objective is to improve converter gas quality using biomass carbon resources, biomass char powder is selected as the metallurgical powder, and the injection parameters are: carrier gas mass flow rate of 1.5~2.0 Nm³. 3 / (t·min), the blowing rate is 0.5~1.0 kg / (t·min), the insertion depth of powder spray gun 1 is 30~50 cm, and the blowing time is 5~8 min; When the furnace is in the slag splashing protection stage and the metallurgical goal is to repair the furnace lining, the furnace repair material is selected as the metallurgical powder, and the injection parameters are: carrier gas mass flow rate of 3.0~3.5 Nm³. 3 The spraying rate is 1.0~1.5 kg / (t·min), the insertion depth of the powder spray gun 1 is 40~60 cm, and the spraying time is 2~4 min.

[0035] Within a complete converter smelting cycle, the control unit 6 can dynamically schedule and sequentially execute multiple different preset schemes according to the real-time requirements of the metallurgical process, thereby realizing the sequential composite injection or rapid switching injection of multiple powders in a single smelting process.

[0036] Specific examples in this embodiment can be found in the examples described in the above embodiments and exemplary implementations, and will not be repeated here.

[0037] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0038] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0039] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0040] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, and the spatial relative descriptions used herein will be interpreted accordingly.

[0041] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0042] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A side-blowing device for converter smelting, characterized in that, include: Powder spray gun (1), used to spray metallurgical powder into the converter molten pool; The position adjustment mechanism (2) is driven and connected to the powder spray gun (1) to adjust the spatial position of the powder spray gun (1); The powder supply unit is connected to the powder spray gun (1) and is used to store metallurgical powder and supply metallurgical powder to the powder spray gun (1). The visual sensing unit (5) is used to acquire image information containing the area of ​​the converter tapping port; The control unit (6) is connected to the position adjustment mechanism (2), the powder supply unit and the vision sensing unit (5) respectively. The control unit (6) is used to receive the image information obtained by the vision sensing unit (5), identify the spatial coordinates of the steel outlet, and generate positioning instructions to control the position adjustment mechanism (2) to adjust the powder spray gun (1) to the preset spraying position. The metallurgical powder flow rate and carrier gas mass flow rate output by the powder supply unit are simultaneously regulated.

2. The side-blowing device for converter smelting according to claim 1, characterized in that, The powder supply unit includes a carrier gas supply unit and a powder storage unit; the carrier gas supply unit is used to provide a gas medium for conveying metallurgical powder in the powder storage unit; The powder storage unit includes a powder storage tank (3), which is connected to the powder spray gun (1) via a pipeline. A powder mass flow rate control device (7) is installed on the pipeline at the outlet of the powder storage tank (3). The carrier gas supply unit includes a carrier gas storage tank (4), which is connected to a powder storage tank (3) via a pipeline. A gas mass flow rate control device (8) is installed on the pipeline between the carrier gas storage tank (4) and the powder storage tank (3). The control unit (6) is communicatively connected to the powder mass flow rate control device (7) and the gas mass flow rate control device (8).

3. The side-blowing device for converter smelting according to claim 2, characterized in that, Multiple powder storage units are arranged in parallel, and each powder storage tank (3) stores metallurgical powders of different types or particle sizes; each powder storage unit collects metallurgical powders into the powder spray gun (1) through pipelines. The control unit (6) is equipped with a module that can independently control the start-up, shutdown and sequential switching of each powder storage unit.

4. The side-blowing device for converter smelting according to claim 2, characterized in that, The gas medium provided by the carrier gas supply unit includes one of the following: inert gas, carbon dioxide, or a mixture of industrial by-product coal gas and combustion exhaust gas after dust removal and purification treatment.

5. The side-blowing device for converter smelting according to claim 1, characterized in that, The position adjustment mechanism (2) is connected to the powder spray gun (1) at the end with a movable joint connector, which enables the powder spray gun (1) to deflect at an angle in the vertical plane and the horizontal plane.

6. The side-blowing device for converter smelting according to claim 1, characterized in that, The visual sensing unit (5) includes a dual-mode image acquisition unit for infrared imaging and visible light imaging. The control unit (6) deploys an image recognition algorithm to parse the acquired image information to identify the outline and spatial coordinates of the steel outlet.

7. The side-blowing device for converter smelting according to claim 1, characterized in that, The powder spray gun (1) is provided with a thermal shock resistant insulation layer around the spray end. The thermal shock resistant insulation layer includes one of the following: aluminum silicate fiber insulation sleeve, plasma sprayed high-temperature ceramic coating, or cast refractory material covering layer. The length of the powder spray gun (1) is 1.5~2.5 m. The nozzle at the spray end of the powder spray gun (1) is a dispersion type nozzle with multiple discrete nozzles, and the diameter of each nozzle is 5~20 mm.

8. The side-blowing device for converter smelting according to claim 1, characterized in that, The cumulative volumetric particle size distribution D50 of the metallurgical powder is between 0.5 and 3.0 mm, and the metallurgical powder includes at least one of coal-based carbon powder, biomass pyrolysis carbon powder, slag-forming agent, slag-forming agent, and furnace filler material.

9. A side-blowing method for converter smelting, characterized in that, The side-blowing device for converter smelting according to any one of claims 1-8, wherein the side-blowing method comprises: During the process window period when the converter is in the blowing or slag splashing stage, the visual sensing unit (5) and the position adjustment mechanism (2) are activated. The visual sensing unit (5) collects image information of the converter tapping area and transmits it to the control unit (6). The control unit (6) identifies and analyzes the spatial coordinates of the converter tapping area and generates a positioning command. At the same time, according to the smelting target, the injection parameters are set by the control unit (6). The injection parameters include the type of metallurgical powder, the mass flow rate of the carrier gas, the injection rate, and the insertion depth and injection time of the powder spray gun (1). The position adjustment mechanism (2) receives the positioning command from the control unit (6) and adjusts the powder spray gun (1) to the preset spray position; at the same time, it starts the powder supply unit and sprays according to the preset spray parameters. After the preset spraying time is reached, the control unit (6) controls the powder supply unit to shut down and controls the position adjustment mechanism (2) to reset the powder spray gun (1).

10. The side-blowing method for converter smelting according to claim 9, characterized in that, The mapping relationship between the smelting target and the injection parameters includes at least one of the following preset schemes: When the metallurgical objective is to promote slag formation, dephosphorization, and inhibit slag re-drying, a slag-forming agent is selected as the metallurgical powder, and the injection parameters are: carrier gas mass flow rate of 2.5~3.5 Nm³. 3 / (t·min), the blowing rate is 0.2~1.0 kg / (t·min), the insertion depth of the powder spray gun (1) is 30~70 cm, and the blowing time is 2~5 min; When the metallurgical objective is to enhance the slag-gold interface reaction, a slag-forming agent is selected as the metallurgical powder, and the injection parameters are: carrier gas mass flow rate of 3.5~4.5 Nm³. 3 / (t·min), the blowing rate is 0.5~2.0 kg / (t·min), the insertion depth of the powder spray gun (1) is 30~70 cm, and the blowing time is 6~12 min; When the metallurgical objective is to increase the CO concentration and calorific value in converter gas, pulverized coal is selected as the metallurgical agent, and the injection parameters are: carrier gas mass flow rate of 1.5~2.0 Nm³. 3 / (t·min), the blowing rate is 0.1~0.5 kg / (t·min), the insertion depth of the powder spray gun (1) is 30~50 cm, and the blowing time is 5~8 min; When the metallurgical objective is to improve converter gas quality using biomass carbon resources, biomass char powder is selected as the metallurgical powder, and the injection parameters are: carrier gas mass flow rate of 1.5~2.0 Nm³. 3 / (t·min), the blowing rate is 0.5~1.0 kg / (t·min), the insertion depth of the powder spray gun (1) is 30~50 cm, and the blowing time is 5~8 min; When the furnace is in the slag splashing protection stage and the metallurgical goal is to repair the furnace lining, the furnace repair material is selected as the metallurgical powder, and the injection parameters are: carrier gas mass flow rate of 3.0~3.5 Nm³. 3 / (t·min), the blowing rate is 1.0~1.5 kg / (t·min), the insertion depth of the powder spray gun (1) is 40~60 cm, and the blowing time is 2~4 min.

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