Feeding device of refining furnace

Abstract

The utility model discloses a feeding device of a refining furnace, which comprises a support frame, a storage bin and a blowing tank, the storage bin and the blowing tank are connected, the bottom of the storage bin is connected with a fluidization device, the discharge end of the storage bin is communicated with the feed end of the blowing tank, the blowing tank is connected with a weighing device for weighing the blowing tank, and the blowing tank is connected with the weighing device. The discharge end of the injection tank is connected with a rotary feeding valve, the rotary feeding valve is connected with a powder conveying pipeline, the end part of the powder conveying pipeline is connected with a powder spraying gun, and the powder conveying pipeline, the injection tank and the fluidization device are connected with an air supply unit. According to the utility model, full-closed and full-automatic accurate feeding can be realized, the slag changing speed is accelerated, the slag foaming rate is improved, on the other hand, the use is safe and reliable, the problems of personnel scald, smoke overflow and the like are avoided, the number of field operators is reduced, the working intensity of the operators is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of refining furnace charging technology, specifically a charging device for a refining furnace. Background Technology

[0002] A refining furnace is a type of smelting equipment used in the hot processing industry, primarily in ferrous metallurgy for the final deoxidation and alloying processes of molten steel. It is classified differently depending on the smelting purpose, with common types including argon-blown refining furnaces and LF refining furnaces. The refining furnace is mainly responsible for multiple production tasks such as high-purity steel smelting, new product development, steel chemical composition control, temperature adjustment, and vacuum degassing. It provides high-quality, qualified molten steel for continuous casting, serving as a link between electric arc furnace and continuous casting production, and is a core component of steel product quality control.

[0003] In the steelmaking process, appropriate amounts of silicon carbide and carbon powder are usually added to increase the strength and hardness of the steel, and improve its dimensional stability and wear resistance. Currently, manual feeding is commonly used. First, bagged silicon carbide and carbon powder are transported to the feeding port, then the bags are cut open and manually added. This results in the material not being evenly distributed on the slag surface, which is not conducive to rapid slag formation. The accuracy of feeding is difficult to control, the operation is time-consuming and labor-intensive, inefficient, and poses certain safety hazards, easily causing smoke and dust to rise, causing harm to health and polluting the surrounding environment. Utility Model Content

[0004] The purpose of this utility model is to provide a feeding device for a refining furnace, which can achieve fully enclosed, fully automatic and precise feeding, accelerate the slag transformation speed and improve the slag foaming rate; on the other hand, it is safe and reliable to use, avoids problems such as burns to personnel and smoke overflow, reduces the number of on-site operators, reduces the intensity of personnel work, and improves production efficiency, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a feeding device for a refining furnace, comprising a support frame and a feeding tank connected to a storage silo and a spraying tank. The bottom of the storage silo is connected to a fluidization device, and the discharge end of the storage silo is connected to the inlet end of the spraying tank. The spraying tank is connected to a weighing device for weighing the spraying tank. The discharge end of the spraying tank is connected to a rotary feed valve, the rotary feed valve is connected to a powder conveying pipe, the end of the powder conveying pipe is connected to a powder spraying gun, and the powder conveying pipe, the spraying tank, and the fluidization device are connected to an air supply unit.

[0006] Preferably, the fluidization device includes an annular pipe, a fluidization interface, multiple support plates, multiple arc-shaped pipes, and multiple air jet interfaces. The fluidization interface is connected to the annular pipe, and the two ends of the arc-shaped pipes are connected to the annular pipe and the air jet interfaces. The air jet interfaces are connected to the storage bin, the support plates are used to support the annular pipe, and the fluidization interface is connected to the air supply unit.

[0007] Preferably, one end of the pallet is fixed to the outside of the storage silo, and the other end is fixedly connected to the annular pipe.

[0008] Preferably, the bottom of the storage silo is connected to a connecting pipe, and the connecting pipe is connected in sequence from top to bottom to an inspection valve, a pneumatic butterfly valve one, and a pneumatic butterfly valve two, and the end of the connecting pipe is connected to the feed end of the spray tank.

[0009] Preferably, the injection tank is connected to a pressure relief pipe and a pressurization port. The pressure relief pipe is connected to a one-way valve, and the end of the pressure relief pipe is connected to a storage silo. The pressurization port is connected to an air supply unit.

[0010] Preferably, the weighing device includes three weighing sensors with equal spacing between adjacent weighing sensors.

[0011] Preferably, the support frame is connected from top to bottom with support plate one and support plate two, the storage bin is connected to support plate one, the weighing sensor is connected to support plate two, and the top of the weighing sensor is connected to the injection tank.

[0012] Preferably, the bottom of the spray tank is connected to a pneumatic butterfly valve three, which is connected to the rotary feed valve via a connecting pipe. The connecting pipe is connected to a cleaning interface, which is connected to an air supply unit.

[0013] Preferably, the discharge end of the rotary feeder valve is connected to a discharge pipe, one end of which is connected to a powder conveying pipeline, and an adjustment pipeline is connected thereto, the end of which is connected to a storage silo.

[0014] Preferably, a corrugated pipe is connected between the spray can and each connecting device.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model can realize fully enclosed, fully automatic and precise feeding, accelerate the slag transformation speed, and improve the slag foaming rate. On the other hand, it is safe and reliable to use, avoids problems such as personnel burns and smoke overflow, reduces the number of on-site operators, reduces the intensity of personnel work, and improves production efficiency. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present utility model;

[0017] Figure 2 This is a schematic diagram of the connection structure between the storage silo and the injection tank of this utility model;

[0018] Figure 3 This is a schematic diagram of the connection structure between the fluidization device and the storage silo of this utility model;

[0019] Figure 4This is a schematic diagram of the spray can structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the connection structure between the rotary feeder valve and the powder conveying pipeline of this utility model;

[0021] Figure 6 This is a schematic diagram of the material loading process of the storage bin of this utility model;

[0022] Figure 7 This is a schematic diagram of the principle of this utility model.

[0023] In the diagram: 1. Support frame; 2. Support plate one; 3. Support plate two; 4. Dust collector; 5. Feeding pipe; 6. Fluidization device; 7. Pressure relief pipe; 8. Debugging pipe; 9. Storage silo; 10. Pulse jet can; 11. Ring pipe; 12. Fluidization interface; 13. Pallet; 14. Arc pipe; 15. Air jet interface; 16. Check valve; 17. Inspection valve; 18. Connecting pipe; 20. Pneumatic butterfly valve one; 21. Pneumatic butterfly valve two; 22. Pressurization interface; 23. Weighing device; 24. Powder conveying pipe; 25. Pneumatic butterfly valve three; 26. Cleaning interface; 27. Rotary feeder valve; 28. Discharge pipe. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1 to 7 This utility model provides a feeding device for a refining furnace, including a support frame 1 and a feeding can 10 connected to a storage silo 9 and a spray can 10. The bottom of the storage silo 9 is connected to a fluidization device 6, and the discharge end of the storage silo 9 is connected to the feed end of the spray can 10. The spray can 10 is connected to a weighing device 23 for weighing the spray can 10. The discharge end of the spray can 10 is connected to a rotary feed valve 27, and the rotary feed valve 27 is connected to a powder conveying pipe 24. The end of the powder conveying pipe 24 is connected to a powder spraying gun, and the powder conveying pipe 24, the spray can 10, and the fluidization device 6 are connected to an air supply unit.

[0026] The storage silo 9 is connected to the feeding pipe 5, which is connected to the tank truck. The tank truck is pressurized by the air supply unit, so that the material is transported to the storage silo 9 along the feeding pipe 5 to store a certain amount of silicon carbide or carbon powder.

[0027] The fluidization device 6 includes an annular pipe 11, a fluidization interface 12, multiple support plates 13, multiple arc-shaped pipes 14, and multiple jet inlets 15. The fluidization interface 12 is connected to the annular pipe 11. The two ends of the arc-shaped pipes 14 are connected to the annular pipe 11 and the jet inlets 15. The jet inlets 15 are connected to the storage silo 9. The support plates 13 support the annular pipe 11. The fluidization interface 12 is connected to the air supply unit. The air supply unit delivers gas into the annular pipe 11, which then enters the jet inlets 15 through the arc-shaped pipes 14. The jet inlets 15 blow air into the storage silo 9, making the material loose and fluid, facilitating the delivery of the material to the spray tank 10, preventing blockage of the connecting pipe 18, and also achieving material drying.

[0028] One end of the support plate 13 is fixed to the outside of the storage silo 9, and the other end is fixedly connected to the annular pipe 11. The support plate 13 provides support for the annular pipe 11 and improves the stability of the annular pipe 11.

[0029] The bottom of the storage silo 9 is connected to a connecting pipe 18, which connects, from top to bottom, a maintenance valve 17, a pneumatic butterfly valve 20, and a pneumatic butterfly valve 21. The end of the connecting pipe 18 is connected to the feed end of the spray tank 10. When performing maintenance on the equipment below the maintenance valve 17, the maintenance valve 17 can be closed. During the material conveying process into the spray tank 10, the pneumatic butterfly valve 21 is opened first, followed by the pneumatic butterfly valve 20, to facilitate the material conveying into the spray tank 10.

[0030] The opening sequence of pneumatic butterfly valve 20 and pneumatic butterfly valve 21 must not be reversed. If pneumatic butterfly valve 20 is opened first, the material will quickly enter the pipeline between pneumatic butterfly valve 20 and pneumatic butterfly valve 21, which can easily cause blockage.

[0031] The purging tank 10 is connected to a pressure relief pipe 7 and a pressurization port 22. The pressure relief pipe 7 is connected to a one-way valve 16, and its end is connected to the storage silo 9. The pressurization port 22 is connected to the air supply unit. The air supply unit pressurizes the purging tank 10, allowing the material to be discharged smoothly from the outlet end of the purging tank 10. Furthermore, the internal air pressure of the purging tank 10 remains relatively constant. If the internal pressure of the purging tank 10 becomes too high, the gas carrying the material will be transported to the storage silo 9 through the pressure relief pipe 7, without directly venting to the atmosphere, thus achieving pressure relief and preventing pollution to the surrounding environment.

[0032] The weighing device 23 includes three weighing sensors with equal spacing between adjacent weighing sensors. It can weigh the spray tank 10 and unload it when it reaches a certain value, ensuring accurate feeding.

[0033] The support frame 1 is connected from top to bottom to support plate 2 and support plate 3. The storage bin 9 is connected to support plate 2, and the weighing sensor is connected to support plate 3. The top of the weighing sensor is connected to the blowing tank 10.

[0034] A pneumatic butterfly valve 25 is connected to the bottom of the injection tank 10. The pneumatic butterfly valve 25 is connected to the rotary feed valve 27 via a connecting pipe, which is connected to a cleaning port 26, which is connected to an air supply unit. When the pneumatic butterfly valve 25 is opened, the valve connected to the cleaning port 26 is closed, and the material is immediately conveyed to the rotary feed valve 27, achieving uniform and continuous downstream discharge and ensuring a uniform material supply. The material then enters the powder conveying pipe 24 through the discharge pipe 28. The air supply unit blows air into the powder conveying pipe 24, causing the material to be ejected from the powder injection gun at the end of the powder conveying pipe 24 and fed into the molten steel.

[0035] When feeding stops, close the pneumatic butterfly valve 25, open the valve connected to the cleaning port 26, and the air supply unit blows air into the cleaning port 26 to clean the material in the rotary feed valve 27 and blow the material into the powder conveying pipe 24 to make full use of the material and avoid waste.

[0036] The discharge end of the rotary feeder valve 27 is connected to a discharge pipe 28. One end of the discharge pipe 28 is connected to the powder conveying pipe 24 and is connected to a test pipe 8. The end of the test pipe 8 is connected to the storage silo 9. During normal operation, the valve on the test pipe 8 is closed. During testing, the valve on the powder conveying pipe 24 is closed, and the valve on the test pipe 8 is opened, allowing the material to enter the storage silo 9 along the test pipe 8, facilitating the testing and adjustment of various equipment.

[0037] Corrugated pipes are connected to each of the connecting devices to prevent external interference with the weighing of the spray tank 10 during weighing, thus avoiding affecting the weighing accuracy.

[0038] The top of the storage silo 9 is connected to a dust collector 4, which facilitates the filtration and purification of the exhaust gas and avoids pollution to the atmosphere.

[0039] Working Principle: The fluidization device 6 blows air into the storage silo 9 to dry and loosen the material. Opening pneumatic butterfly valve 21 and then pneumatic butterfly valve 20 facilitates material delivery to the spray tank 10. Once the spray tank 10 reaches a certain weight, the air supply unit pressurizes it, causing the material to discharge from the outlet. Rotating the feed valve 27 ensures uniform and continuous downstream unloading, guaranteeing a consistent material supply. The material enters the powder conveying pipe 24 through the discharge pipe 28. The air supply unit blows air into the powder conveying pipe 24, causing the material to be sprayed from the powder spraying gun at the end of the pipe 24 and fed into the molten steel. The entire process is fully enclosed, fully automatic, and precise, ensuring safe and reliable operation, preventing burns and dust spillage, reducing the number of on-site operators, lowering workload, and improving production efficiency.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A feeding device for a refining furnace, characterized in that, Includes a support frame (1) and a material storage silo (9) and a spray can (10). The bottom of the material storage silo (9) is connected to a fluidization device (6), and the discharge end of the material storage silo (9) is connected to the inlet end of the spray can (10). The spray can (10) is connected to a weighing device (23) for weighing the spray can (10). The discharge end of the spray can (10) is connected to a rotary feed valve (27), and the rotary feed valve (27) is connected to a powder conveying pipe (24). The end of the powder conveying pipe (24) is connected to a powder spraying gun, and the powder conveying pipe (24), the spray can (10), and the fluidization device (6) are connected to an air supply unit.

2. The feeding device for a refining furnace according to claim 1, characterized in that, The fluidization device (6) includes an annular pipe (11), a fluidization interface (12), multiple trays (13), multiple arc-shaped pipes (14), and multiple jet inlets (15). The fluidization interface (12) is connected to the annular pipe (11). The two ends of the arc-shaped pipes (14) are connected to the annular pipe (11) and the jet inlets (15). The jet inlets (15) are connected to the storage bin (9). The trays (13) are used to support the annular pipe (11). The fluidization interface (12) is connected to the air supply unit.

3. The feeding device for a refining furnace according to claim 2, characterized in that, One end of the pallet (13) is fixed to the outside of the storage bin (9), and the other end is fixedly connected to the annular pipe (11).

4. The feeding device for a refining furnace according to claim 1, characterized in that, The bottom of the storage silo (9) is connected to a connecting pipe (18), which is connected from top to bottom to a maintenance valve (17), a pneumatic butterfly valve one (20), and a pneumatic butterfly valve two (21), and the end of the connecting pipe (18) is connected to the feed end of the spray tank (10).

5. The feeding device for a refining furnace according to claim 1, characterized in that, The spray tank (10) is connected to a pressure relief pipe (7) and a pressurization port (22). The pressure relief pipe (7) is connected to a one-way valve (16), and the end of the pressure relief pipe (7) is connected to the storage bin (9). The pressurization port (22) is connected to the air supply unit.

6. The feeding device for a refining furnace according to claim 1, characterized in that, The weighing device (23) includes three weighing sensors with equal spacing between adjacent weighing sensors.

7. The feeding device for a refining furnace according to claim 6, characterized in that, The support frame (1) is connected from top to bottom to support plate one (2) and support plate two (3). The storage bin (9) is connected to support plate one (2). The weighing sensor is connected to support plate two (3), and the top of the weighing sensor is connected to the blowing tank (10).

8. The feeding device for a refining furnace according to claim 1, characterized in that, The bottom of the spray tank (10) is connected to a pneumatic butterfly valve (25), which is connected to the rotary feed valve (27) via a connecting pipe. The connecting pipe is connected to a cleaning port (26), which is connected to the air supply unit.

9. The feeding device for a refining furnace according to claim 1, characterized in that, The discharge end of the rotary feed valve (27) is connected to a discharge pipe (28), one end of which is connected to the powder conveying pipe (24). The discharge pipe (28) is connected to an adjustment pipe (8), and the end of the adjustment pipe (8) is connected to the storage bin (9).

10. The feeding device for a refining furnace according to claim 1, characterized in that, The spray tank (10) is connected to each connecting device by a corrugated pipe.

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