Converter stokehole dust removal equipment and control method thereof
By installing a furnace-front dust removal device during the converter steelmaking process, and using a dust collection unit and compensator to quickly capture high-temperature flue dust, the problems of equipment corrosion and environmental pollution caused by flue dust diffusion are solved, achieving efficient dust removal and improved equipment flexibility.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHONGQING IRON & STEEL CO LTD
- Filing Date
- 2026-02-05
- Publication Date
- 2026-04-24
AI Technical Summary
During the converter steelmaking process, high-temperature dust causes corrosion and wear to the crane equipment as it spreads over long distances. Failure to capture it in a timely manner leads to environmental pollution and safety hazards.
Design a converter furnace front dust removal device. The dust collection unit is connected to the gap between the molten iron ladle and the converter. High-temperature smoke and dust are captured through the dust collection hood, dust collection pipe and dust collector. The device is quickly installed and disassembled using compensators and cylinders. The dust is cleaned up in time by combining with ash storage tank and ash transport vehicle.
It improves the efficiency of smoke and dust collection, protects the driving equipment, reduces environmental pollution, reduces worker health risks, enhances the versatility and automation level of the equipment, and ensures continuous and efficient operation.
Smart Images
Figure CN121915216A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of iron and steel metallurgy technology, and relates to a converter furnace front dust removal device and its control method. Background Technology
[0002] The pouring of molten iron into the converter by the converter crane is a crucial initial step in converter steelmaking. However, this operation currently faces numerous challenging technical problems, seriously affecting production stability, equipment safety, and the quality of the surrounding environment.
[0003] When the converter crane pours molten iron into the converter, it instantly generates a large amount of high-temperature dust. This dust is extremely hot, contains enormous heat energy, and has a complex composition, including various metal oxides and harmful gases. To combat this dust, primary and secondary dust collection systems are currently installed around the converter body. Primary dust collection mainly targets the high-concentration dust generated in the early stages of converter smelting. Highly efficient ventilation devices and dust collection equipment quickly draw in most of the dust for preliminary treatment. Secondary dust collection further supplements the collection of dust remaining after primary dust collection, thereby improving dust collection efficiency.
[0004] Although primary and secondary dust removal systems have alleviated the dust problem to some extent, a portion of excess dust still cannot be effectively captured. Therefore, a tertiary dust removal (environmental dust removal) system was installed in front of the converter to comprehensively capture this remaining dust. However, the tertiary dust removal system has revealed numerous problems in actual operation.
[0005] The tertiary dust collector is located a considerable distance from the point of origin of the high-temperature flue gas. Due to the layout and process limitations of the steel plant, the tertiary dust collector cannot be installed close to the source of the flue gas. This allows the high-temperature flue gas ample time and space to disperse as it travels from the point of origin to the tertiary dust collector. Moreover, during this long-distance diffusion, the temperature of the flue gas gradually decreases, but its volume continuously expands, further increasing the difficulty of collection.
[0006] As the smoke and dust diffuse, they inevitably pass through the crane's operating area. The crane, as a crucial transport device in the converter steelmaking process, has highly demanding requirements for its operating environment. High-temperature smoke and dust contain a large amount of corrosive substances and particles. When this smoke and dust directly impacts the crane's electromechanical equipment, it causes corrosion and wear on the equipment's surface, shortening its service life. Simultaneously, the high-temperature smoke and dust also raises the equipment's temperature, affecting its normal operating accuracy and potentially leading to equipment malfunctions and safety accidents.
[0007] Furthermore, the long distance between the three dust removal systems and the point of smoke generation leads to untimely smoke collection. If the smoke is not quickly captured the moment it is generated, it will rapidly spread into the surrounding environment. This not only reduces visibility within the workshop, affecting operators' vision and work efficiency, but also pollutes the surrounding atmosphere, endangering the health of operators. Moreover, the spilled smoke can corrode and pollute other equipment and buildings within the factory area, increasing the company's maintenance costs.
[0008] In summary, the control of flue gas during the hot metal transfer process in a converter faces numerous technical challenges, including long distances, impact on the converter equipment, and untimely dust collection, which urgently require effective measures to address. Summary of the Invention
[0009] In view of this, the purpose of the present invention is to provide a converter furnace front dust removal device and its control method, which aims to solve the problem of untimely dust collection and high-temperature dust overflow during the converter molten iron charging process.
[0010] To achieve the above objectives, the present invention provides the following technical solution: A converter furnace front dust removal device is installed above the gap between the molten iron ladle and the converter furnace opening. The molten iron ladle is suspended upside down on a traveling beam, and the furnace front dust removal device is installed on the traveling beam. The furnace front dust removal device includes a dust collection unit installed on the traveling beam and a dust collection pipe detachably connected to the dust collection unit. One end of the dust collection pipe connected to the dust collection unit is provided with a compensator and a cylinder. The compensator extends and retracts under the push of the cylinder to realize the connection and separation of the dust collection pipe and the dust collection unit. A dust collector is provided at the end of the dust collection pipe away from the dust collection unit.
[0011] Optionally, the dust collection unit includes a hanger, a dust collection hood, and a dust collection pipe, wherein the dust collection pipe is detachably connected to the dust removal pipe; the dust collection hood is mounted on the traveling beam via the hanger, and the dust collection pipe is installed on the traveling beam; the outlet of the dust collection hood is connected to the dust collection pipe, and the inlet of the dust collection hood faces the gap between the molten iron ladle and the converter furnace opening.
[0012] Optionally, the maximum diameter of the compensator is greater than the inner diameter of the suction pipe.
[0013] Optionally, the dust collector is provided with an exhaust pipe at its outlet end, and a fan and a silencer are provided on the exhaust pipe.
[0014] Optionally, the dust removal duct is equipped with an electric valve to turn the dust removal state on or off.
[0015] Optionally, the bottom outlet of the dust collector is connected to several ash storage tanks through a dust discharge pipe. The bottom of each ash storage tank is provided with an ash discharge port, and an ash transport vehicle runs below the ash discharge port to unload ash.
[0016] A control method, employing any of the aforementioned converter pre-furnace dust removal equipment, includes the following steps: before the converter starts operation after the overhead crane enters the molten iron pouring position, the compensator is connected to the dust collection unit under the push of the cylinder. After the connection is completed, the electric valve is opened to enter the dust removal state; then the overhead crane starts pouring molten iron from the ladle into the converter. During the pouring process, high-temperature flue gas is captured by the dust collection hood and enters the dust removal pipe through the dust collection pipe arranged above the overhead crane beam, and then enters the dust collector for dust removal treatment. The treated gas is discharged through the exhaust pipe; after the molten iron is poured in, the compensator is retracted under the push of the cylinder, disconnecting from the dust collection pipe, and at the same time, the electric valve is closed to stop dust removal, and the overhead crane moves to proceed to the next process.
[0017] The beneficial effects of this invention are as follows: The dust collection unit and molten iron ladle of this invention are both mounted on the overhead crane beam, allowing them to move simultaneously to the converter position. This not only improves the flexibility and response speed of the dust collection equipment but also prevents dust collection leakage caused by asynchronous equipment movement, thereby further enhancing dust collection efficiency. Furthermore, the dust collection hood opening faces the gap between the molten iron ladle and the converter, rapidly and effectively capturing the overflowing high-temperature dust during the converter's molten iron mixing process. This reduces dust diffusion within the workshop, protects the overhead crane equipment in front of the furnace from damage, reduces environmental pollution, and minimizes the health hazards of dust to workers. It solves the problems of long distances between dust collection devices, untimely dust collection, and high-temperature dust overflow during converter molten iron mixing. The dust collection unit and dust collection pipes are connected via compensators and cylinders, enabling rapid installation and disassembly. This simplifies the installation and disassembly process, improves work efficiency, and allows the equipment to adapt to converters and molten iron ladles of different sizes and models, enhancing its versatility and adaptability, and facilitating multiple, continuous dust collection processes. In addition, the ash storage tank and ash transport vehicle at the bottom of the dust collector work together to achieve timely cleaning and transfer of dust, avoid the accumulation of dust in the equipment and secondary dust generation, ensure the continuous and efficient operation of the dust removal equipment, and at the same time reduce the labor intensity and safety risks of workers.
[0018] In summary, the converter furnace front dust removal equipment and its control method of the present invention not only solve the problem of dust collection, but also bring multiple technical benefits such as improving equipment flexibility, improving the working environment, enhancing equipment versatility, improving automation level, and ensuring continuous and efficient operation.
[0019] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description
[0020] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the overall dust removal equipment of the present invention; Figure 2 This is a basic flowchart of the control method of the present invention.
[0021] Figure label: 1. Converter, 2. Ladle of molten iron, 3. Dust hood, 4. Hanger, 5. Compensator, 6. Cylinder, 7. Electric valve, 8. Dust suction pipe, 9. Dust removal pipe, 10. Dust collector, 11. Exhaust pipe, 12. Fan, 13. Silencer, 14. Chimney. Detailed Implementation
[0022] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0023] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.
[0024] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and 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. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0025] Example 1 Please see Figures 1-2 This is a dust removal device for converter furnace front, which is set above the gap between the molten iron ladle 2 and the furnace mouth of converter 1, so as to capture high-temperature dust in time when molten iron is poured from the molten iron ladle 2 to converter 1, and prevent the high-temperature dust from overflowing; it solves many technical problems in dust control during the process of pouring molten iron from converter 1, such as long distance, impact on the traveling equipment, and untimely collection.
[0026] The molten iron ladle 2 is hung upside down on the traveling beam, and the furnace front dust removal equipment is installed on the traveling beam; the furnace front dust removal equipment includes a dust collection unit installed on the traveling beam, and a dust collection pipe 9 that is detachably connected to the dust collection unit; Furthermore, the dust collection unit includes a hanger 4, a dust collection hood 3, and a dust collection pipe 8. The dust collection pipe 8 is detachably connected to the dust removal pipe 9. The dust collection hood 3 is mounted on the traveling beam via the hanger 4, and the dust collection pipe 8 is mounted on the traveling beam. The outlet of the dust collection hood 3 is connected to the dust collection pipe 8, and the inlet of the dust collection hood 3 faces the gap between the molten iron ladle 2 and the furnace mouth of the converter 1.
[0027] Furthermore, a compensator 5 and a cylinder 6 are provided at the end of the dust removal pipe 9 that connects to the dust collection unit. The compensator 5 extends and retracts under the push of the cylinder 6 to realize the connection and separation of the dust removal pipe 9 and the dust collection pipe 8. A dust collector 10 is provided at the end of the dust removal pipe 9 that is away from the dust collection pipe 8. The maximum diameter of the compensator 5 is larger than the inner diameter of the dust collection pipe 8, which facilitates the elimination of docking errors and ensures docking stability.
[0028] An electric valve 7 is installed on the dust removal duct 9. The electric valve 7 is opened or closed according to the connection or separation status between the dust removal duct 9 and the dust collection duct 8, so as to turn the dust removal status on or off.
[0029] In some embodiments of the present invention, the dust collector 10 is provided with an exhaust pipe 11 at its outlet end, and a fan 12 and a silencer 13 are provided on the exhaust pipe 11. The fan 12 serves as a power control device, converting mechanical energy into airflow pressure energy to drive the gas to flow directionally in the exhaust pipe 11. The silencer 13 is used to control noise, attenuating airflow noise through physical means to prevent noise pollution from harming personnel health and equipment operation.
[0030] In some embodiments of the present invention, the bottom outlet of the dust collector 10 is connected to several ash storage tanks through a dust discharge pipe. The bottom of the ash storage tank is provided with an ash discharge port. The ash transport vehicle runs below the ash discharge port to perform ash discharge work, so as to ensure the continuous operation of the entire dust removal equipment.
[0031] Example 2 This embodiment is a dust control method for converter front dust removal equipment based on the above embodiment 1, including the following steps: When the crane enters the molten iron pouring position and before the converter 1 starts working, the compensator 5 is driven by the cylinder 6 to connect with the dust collection unit. After the connection is completed, the electric valve 7 is opened to enter the dust removal state; then the converter 1 front crane pours the molten iron ladle 2 into the converter 1 through the cooperation of the main hook and the auxiliary hook. During the process of pouring the molten iron into the converter 1, the high temperature flue gas is captured by the dust collection hood 3 and enters the dust removal pipe 9 through the dust collection pipe 8 arranged above the crane beam, and then enters the dust collector 10 for dust removal treatment. The qualified gas is discharged to the chimney 14 through the exhaust pipe 11; after the molten iron is poured in, the compensator 5 is retracted under the push of the cylinder 6, disconnecting from the dust collection pipe 8, and at the same time the electric valve 7 is closed to stop the dust removal. The crane can then move laterally to enter the next process.
[0032] The dust collection unit and the molten iron ladle 2 of this invention are both mounted on the traveling beam, allowing them to move simultaneously with the traveling beam to the converter 1. This not only improves the flexibility and response speed of the dust collection equipment but also avoids dust collection leakage caused by asynchronous equipment movement, thereby further enhancing dust collection efficiency. Furthermore, the dust collection hood 3 opens towards the gap between the molten iron ladle 2 and the converter 1, rapidly and effectively capturing the overflowing high-temperature dust during the molten iron mixing process in the converter 1. This reduces the spread of dust within the workshop, protects the traveling beam equipment in front of the furnace from damage, reduces environmental pollution, and minimizes the health hazards of dust to workers. It solves the problems of long distances between dust collection devices and untimely dust collection, leading to the overflow of high-temperature dust during the molten iron mixing process in the converter 1. The dust collection unit and dust collection pipe 9 of the dust removal equipment are connected by compensators 5 and cylinders 6, enabling rapid installation and disassembly. This not only simplifies the installation and disassembly process and improves work efficiency, but also allows the equipment to adapt to converters 1 and molten iron ladles 2 of different sizes and models, enhancing its versatility and adaptability, and facilitating multiple dust removal processes in a continuous manner. Furthermore, the ash storage tank and ash transport vehicle at the bottom of the dust collector 10 work together to ensure timely cleaning and transfer of dust, preventing the accumulation of dust within the equipment and secondary dust generation, ensuring the continuous and efficient operation of the dust removal equipment, and reducing the labor intensity and safety risks for workers.
[0033] In summary, the converter furnace front dust removal equipment and its control method of the present invention not only solve the problem of dust collection, but also bring multiple technical benefits such as improving equipment flexibility, improving the working environment, enhancing equipment versatility, improving automation level, and ensuring continuous and efficient operation.
[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.
Claims
1. A converter furnace front dust removal device, characterized in that: The molten iron ladle (2) is positioned above the gap between the furnace mouth of the converter (1). The molten iron ladle (2) is inverted on the traveling beam. The dust removal equipment in front of the furnace is set on the traveling beam. The dust removal equipment in front of the furnace includes a dust collection unit set on the traveling beam and a dust removal pipe (9) detachably connected to the dust collection unit. One end of the dust removal pipe (9) connected to the dust collection unit is provided with a compensator (5) and a cylinder (6). The compensator (5) extends and retracts under the push of the cylinder (6) to realize the connection and separation of the dust removal pipe (9) and the dust collection unit. A dust collector (10) is provided at the end of the dust removal pipe (9) away from the dust collection unit.
2. The converter furnace front dust removal equipment according to claim 1, characterized in that: The dust collection unit includes a hanger (4), a dust collection hood (3), and a dust collection pipe (8). The dust collection pipe (8) is detachably connected to the dust removal pipe (9). The dust collection hood (3) is mounted on the traveling beam via the hanger (4), and the dust collection pipe (8) is mounted on the traveling beam. The outlet of the dust collection hood (3) is connected to the dust collection pipe (8), and the inlet of the dust collection hood (3) faces the gap between the molten iron ladle (2) and the furnace mouth of the converter (1).
3. The converter furnace front dust removal equipment according to claim 2, characterized in that: The maximum diameter of the compensator (5) is greater than the inner diameter of the dust suction pipe (8).
4. The converter furnace front dust removal equipment according to claim 2, characterized in that: The dust collector (10) has an exhaust pipe (11) at its outlet end, and a fan (12) and a silencer (13) are provided on the exhaust pipe (11).
5. The converter furnace front dust removal equipment according to claim 2, characterized in that: The dust removal pipe (9) is equipped with an electric valve (7) to open or close the dust removal state.
6. The converter furnace front dust removal equipment according to claim 2, characterized in that: The bottom outlet of the dust collector (10) is connected to several ash storage tanks through a dust discharge pipe. The bottom of the ash storage tank is provided with an ash discharge port, and the ash transport vehicle runs below the ash discharge port to perform ash discharge work.
7. A control method, characterized in that: The converter furnace dust removal equipment according to any one of claims 2 to 6 includes the following steps: when the crane enters the molten iron pouring position and before the converter (1) starts working, the compensator (5) is connected to the dust collection unit under the push of the cylinder (6). After the connection is completed, the electric valve (7) is opened to enter the dust removal state; then the crane starts to pour the molten iron from the molten iron ladle (2) into the converter (1). During the process of pouring the molten iron into the converter (1), the high temperature flue gas is captured by the dust collection hood (3) and enters the dust removal pipe (9) through the dust collection pipe (8) arranged above the crane beam, and then enters the dust collector (10) for dust removal treatment. The qualified gas is discharged through the exhaust pipe (11); after the molten iron is poured in, the compensator (5) is retracted under the push of the cylinder (6), disconnected from the dust collection pipe (8), and at the same time the electric valve (7) is closed to stop the dust removal. The crane moves to enter the next process.