Feeding device of refining furnace

Abstract

The feeding device of the refining furnace comprises a supporting frame, a storage bin and a blowing tank, the storage bin and the blowing tank are connected to the supporting frame, the bottom of the storage bin is connected with a fluidization device, the discharging end of the storage bin is communicated with the feeding end of the blowing tank, the blowing tank is connected with a weighing device used for weighing the blowing tank, and the weighing device is connected with a control 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. The device can realize full-closed and full-automatic accurate feeding, accelerates the slag changing speed, improves the slag foaming rate, is safe and reliable to use, avoids the problems of personnel scald, smoke overflow and the like, reduces the number of field operators, reduces the working intensity of the operators, and improves the production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of charging technology for refining furnaces, and specifically provides a charging device for a refining furnace. Background Art

[0002] A refining furnace is a smelting device in the hot processing industry, and is mostly used for the final deoxidation and alloying processes of molten steel in ferrous metallurgy. According to different smelting purposes, there are different classifications, and common ones include argon blowing refining furnaces, LF refining furnaces, etc. The refining furnace is mainly responsible for multiple production tasks such as high-purity molten steel smelting, new product development, control of molten steel chemical composition, temperature adjustment, vacuum degassing, etc., provides high-quality qualified molten steel for continuous casting, is the link between the electric furnace and continuous casting production, and is the core link for controlling the quality of steelmaking products.

[0003] During the steelmaking process, it is usually necessary to add appropriate amounts of silicon carbide and carbon powder to increase the strength and hardness of the steel, improve its dimensional stability and wear resistance. Currently, manual feeding is usually used for operation. First, the bagged silicon carbide and carbon powder are transported to the feeding port, and then the bags are cut open for manual feeding, resulting in uneven distribution of the materials on the surface of the slag, which is not conducive to rapid slag change. The feeding accuracy is difficult to control, the operation is time-consuming and laborious, the efficiency is low, and there are certain safety hazards, which are prone to cause dust to rise, causing harm to the body and pollution to the surrounding environment. Summary of the Invention

[0004] The purpose of the present invention is to provide a charging device for a refining furnace, which can achieve fully enclosed and fully automatic precise feeding, accelerate the slag change speed, and improve the slag foaming rate; on the other hand, it is safe and reliable to use, avoiding problems such as personnel scalding and smoke spillage, reducing the number of on-site operators, reducing the labor intensity of personnel, and improving production efficiency, thus solving the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A charging device for a refining furnace, including a support frame and connected to a storage bin and a spray tank. The bottom of the storage bin is connected with a fluidization device, and the discharge end of the storage bin is communicated with the feed end of the spray tank. The spray tank is connected with a weighing device for weighing the spray tank. The discharge end of the spray tank is connected with a rotary feeder valve. The rotary feeder valve is connected with a powder conveying pipeline. The end of the powder conveying pipeline is connected with a powder spraying gun, and the powder conveying pipeline, the spray tank, and the fluidization device are connected with a gas supply unit.

[0006] Preferably, the fluidization device includes an annular pipe, a fluidization interface, a plurality of support plates, a plurality of arc pipes, and a plurality of jet interfaces. The fluidization interface is connected to the annular pipe. The two ends of the arc pipe are communicated with the annular pipe and the jet interface. The jet interface is connected to the storage bin. The support plate is used for supporting the annular pipe. The fluidization interface is connected to the gas supply unit.

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

[0008] Preferably, a connecting pipe is connected to the bottom of the storage bin. The connecting pipe is sequentially connected with a maintenance valve, a pneumatic butterfly valve I, and a pneumatic butterfly valve II from top to bottom, and the end of the connecting pipe is connected to the feeding end of the injection tank.

[0009] Preferably, the injection tank is connected with a pressure relief pipeline and a pressurizing interface. The pressure relief pipeline is connected with a one-way valve, and the end of the pressure relief pipeline is connected to the storage bin. The pressurizing interface is connected to the air supply unit.

[0010] Preferably, the weighing device includes three weighing sensors, and the distance between adjacent weighing sensors is equal.

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

[0012] Preferably, a pneumatic butterfly valve III is connected to the bottom of the injection tank. The pneumatic butterfly valve III and the rotary feeder are connected through a connecting pipeline. The connecting pipeline is connected with a cleaning interface, and the cleaning interface is connected to the air supply unit.

[0013] Preferably, the discharging end of the rotary feeder is connected with a discharging pipe. One end of the discharging pipe is communicated with the powder conveying pipeline, and a debugging pipeline is connected. The end of the debugging pipeline is connected to the storage bin.

[0014] Preferably, bellows are connected between the injection tank and each connecting device.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention can achieve fully enclosed and fully automatic precise feeding, accelerate the slag change speed, improve the slag foaming rate. On the other hand, it is safe and reliable in use, avoiding problems such as scalding of personnel and overflow of soot, reducing the number of on-site operators, reducing the labor intensity of personnel, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a perspective view of the present invention;

[0017] Figure 2 is a schematic connection structure diagram of the storage bin and the injection tank of the present invention;

[0018] Figure 3 is a schematic connection structure diagram of the fluidization device and the storage bin of the present invention;

[0019] Figure 4 is a schematic structure diagram of the injection tank of the present invention;

[0020] Figure 5 Schematic diagram of the connection structure between the rotary feeder valve and the powder conveying pipeline of the present invention;

[0021] Figure 6 Schematic diagram of the feeding process of the storage bin of the present invention;

[0022] Figure 7 Principle block diagram of the present invention.

[0023] In the figure: 1, support frame; 2, first support plate; 3, second support plate; 4, dust collector; 5, feeding pipeline; 6, fluidization device; 7, pressure relief pipeline; 8, debugging pipeline; 9, storage bin; 10, injection tank; 11, annular pipe; 12, fluidization interface; 13, support plate; 14, arc pipe; 15, jet interface; 16, check valve; 17, maintenance valve; 18, connecting pipe; 20, first pneumatic butterfly valve; 21, second pneumatic butterfly valve; 22, pressurization interface; 23, weighing device; 24, powder conveying pipeline; 25, third pneumatic butterfly valve; 26, cleaning interface; 27, rotary feeder valve; 28, discharge pipe. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figures 1 to 7 , the present invention provides a feeding device for a refining furnace, including a support frame 1 and connected to a storage bin 9 and an injection tank 10. A fluidization device 6 is connected to the bottom of the storage bin 9, and the discharge end of the storage bin 9 is communicated with the feed end of the injection tank 10. The injection tank 10 is connected with a weighing device 23 for weighing the injection tank 10. The discharge end of the injection tank 10 is connected with a rotary feeder valve 27. The rotary feeder valve 27 is connected with a powder conveying pipeline 24. The end of the powder conveying pipeline 24 is connected with a powder injection gun, and a gas supply unit is connected to the powder conveying pipeline 24, the injection tank 10, and the fluidization device 6.

[0026] The storage bin 9 is connected with a feeding pipeline 5. The feeding pipeline 5 is connected with a tank truck. By pressurizing the tank truck through the gas supply unit, the material is conveyed along the feeding pipeline 5 into the storage bin 9 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, a plurality of support plates 13, a plurality of arc pipes 14, and a plurality of jet interfaces 15. The fluidization interface 12 is connected to the annular pipe 11. Both ends of the arc pipe 14 are communicated with the annular pipe 11 and the jet interface 15. The jet interface 15 is connected to the storage bin 9. The support plate 13 is used to support the annular pipe 11. The fluidization interface 12 is connected to the air supply unit. The air supply unit transports gas into the annular pipe 11, and then enters the jet interface 15 through the arc pipe 14. The jet interface 15 blows air into the storage bin 9, making the material in a fluffy flowing state, facilitating the transportation of the material into the injection tank 10, avoiding blockage of the connecting pipe 18, and also realizing the drying of the material.

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

[0029] A connecting pipe 18 is connected to the bottom of the storage bin 9. The connecting pipe 18 is sequentially connected with a maintenance valve 17, a pneumatic butterfly valve one 20, and a pneumatic butterfly valve two 21 from top to bottom, and the end of the connecting pipe 18 is connected to the feeding end of the injection tank 10. When maintaining the equipment below the maintenance valve 17, the maintenance valve 17 can be closed. During the process of transporting the material into the injection tank 10, first open the pneumatic butterfly valve two 21, and then open the pneumatic butterfly valve one 20, facilitating the transportation of the material into the injection tank 10.

[0030] The opening sequence of the pneumatic butterfly valve one 20 and the pneumatic butterfly valve two 21 cannot be disordered. If the pneumatic butterfly valve one 20 is opened first, the material will quickly enter the pipeline between the pneumatic butterfly valve one 20 and the pneumatic butterfly valve two 21, easily causing blockage.

[0031] The injection tank 10 is connected with a pressure relief pipeline 7 and a pressurization interface 22. The pressure relief pipeline 7 is connected with a check valve 16, and the end of the pressure relief pipeline 7 is connected to the storage bin 9. The pressurization interface 22 is connected to the air supply unit. The air supply unit pressurizes the injection tank 10, enabling the material to be smoothly discharged from the discharge end of the injection tank 10. And the internal pressure of the injection tank 10 is in a relatively constant state. If the internal pressure of the injection tank 10 is too high, the gas with the material will be transported into the storage bin 9 through the pressure relief pipeline 7, without directly discharging to the atmosphere, achieving the purpose of 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, which can weigh the injection tank 10. When it reaches a certain value, discharging operation is carried out, and the feeding is accurate.

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

[0034] A pneumatic butterfly valve three 25 is connected to the bottom of the injection tank 10. The pneumatic butterfly valve three 25 is connected to the rotary feeder valve 27 through a connecting pipe. The connecting pipe is connected with a cleaning interface 26, and the cleaning interface 26 is connected to the air supply unit. When the pneumatic butterfly valve three 25 is opened and the valve connected to the cleaning interface 26 is in the closed state, the material is immediately transported into the rotary feeder valve 27, realizing uniform and continuous discharging downstream to ensure the uniform supply of the material. Then the material enters the powder conveying pipe 24 through the discharge pipe 28, and the air supply unit blows air into the powder conveying pipe 24, so that the material is ejected from the powder injection gun at the end of the powder conveying pipe 24 and fed into the molten steel.

[0035] When the feeding stops, the pneumatic butterfly valve three 25 is closed, and the valve connected to the cleaning interface 26 is opened. The air supply unit blows air into the cleaning interface 26 to clean the material in the rotary feeder valve 27 and blow the material into the powder conveying pipe 24, which is convenient for making full use of the material and avoiding waste.

[0036] The discharge end of the rotary feeder valve 27 is connected with a discharge pipe 28. One end of the discharge pipe 28 is communicated with the powder conveying pipe 24, and a debugging pipe 8 is connected. The end of the debugging pipe 8 is connected with the storage bin 9. During normal operation, the valve on the debugging pipe 8 is in the closed state; during debugging, the valve on the powder conveying pipe 24 is closed and the valve on the debugging pipe 8 is opened, so that the material enters the storage bin 9 along the debugging pipe 8, which is convenient for debugging each device.

[0037] Bellows are connected between the injection tank 10 and each connecting device to prevent interference from the outside world to the weighing of the injection tank 10 during weighing and affect the weighing accuracy.

[0038] A dust collector 4 is connected to the top of the storage bin 9 to facilitate filtering and purifying the discharged gas and avoid polluting the atmosphere.

[0039] Working principle: The fluidization device 6 blows air into the storage bin 9 to make the material in a dry and fluffy state. Open the pneumatic butterfly valve two 21, and then open the pneumatic butterfly valve one 20 to facilitate transporting the material into the injection tank 10. When the injection tank 10 reaches a certain weight, the air supply unit pressurizes the injection tank 10, so that the material is discharged from the discharge end of the injection tank 10, and the rotary feeder valve 27 realizes uniform and continuous discharging downstream to ensure the uniform supply of the material. The material enters the powder conveying pipe 24 through the discharge pipe 28, and the air supply unit blows air into the powder conveying pipe 24, so that the material is ejected from the powder injection gun at the end of the powder conveying pipe 24 and fed into the molten steel. The whole process realizes fully enclosed and fully automatic precise feeding, is safe and reliable to use, avoids problems such as personnel scalding and smoke spillage, reduces the number of on-site operators, reduces the labor intensity of personnel, and improves production efficiency.

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

Claims

1. A feeding device for a refining furnace, characterized in that, It includes a support frame (1) and is connected to a storage bin (9) and a blowing tank (10). A fluidization device (6) is connected to the bottom of the storage bin (9), and the discharging end of the storage bin (9) is communicated with the feeding end of the blowing tank (10). The blowing tank (10) is connected with a weighing device (23) for weighing the blowing tank (10). The discharging end of the blowing tank (10) is connected with a rotary feeder valve (27). The rotary feeder valve (27) is connected with a powder conveying pipeline (24). The end of the powder conveying pipeline (24) is connected with a powder spraying gun, and the powder conveying pipeline (24), the blowing tank (10), and the fluidization device (6) are connected with a gas supply unit.

2. The feeding device of a refining furnace according to claim 1, characterized in that, The fluidization device (6) includes an annular pipe (11), a fluidization interface (12), a plurality of support plates (13), a plurality of arc pipes (14), and a plurality of jet interfaces (15). The fluidization interface (12) is connected to the annular pipe (11). The two ends of the arc pipe (14) are communicated with the annular pipe (11) and the jet interface (15). The jet interface (15) is connected to the storage bin (9). The support plate (13) is used for supporting the annular pipe (11). The fluidization interface (12) is connected to the gas supply unit.

3. The feeding device of a refining furnace according to claim 2, characterized in that, One end of the support plate (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 of a refining furnace according to claim 1, wherein A connecting pipe (18) is connected to the bottom of the storage bin (9). The connecting pipe (18) is sequentially connected with a maintenance valve (17), a pneumatic butterfly valve one (20), and a pneumatic butterfly valve two (21) from top to bottom. The end of the connecting pipe (18) is connected to the feeding end of the blowing tank (10).

5. The feeding device of a refining furnace according to claim 1, characterized in that, The blowing tank (10) is connected with a pressure relief pipeline (7) and a pressurizing interface (22). The pressure relief pipeline (7) is connected with a check valve (16). The end of the pressure relief pipeline (7) is connected to the storage bin (9). The pressurizing interface (22) is connected to the gas supply unit.

6. The feeding device of a refining furnace according to claim 1, characterized in that, The weighing device (23) includes three load cells, and the distance between adjacent load cells is equal.

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

8. The feeding device of a refining furnace according to claim 1, characterized in that, The bottom of the blowing tank (10) is connected with a pneumatic butterfly valve three (25). The pneumatic butterfly valve three (25) and the rotary feeder valve (27) are connected through a connecting pipeline. The connecting pipeline is connected with a cleaning interface (26). The cleaning interface (26) is connected to the gas supply unit.

9. The feeding device of a refining furnace according to claim 1, characterized in that, The discharging end of the rotary feeder valve (27) is connected with a discharging pipe (28). One end of the discharging pipe (28) is communicated with the powder conveying pipeline (24). A debugging pipeline (8) is connected, and the end of the debugging pipeline (8) is connected to the storage bin (9).

10. The feeding device of a refining furnace according to claim 1, characterized in that, Bellows are connected between the blowing tank (10) and each connecting device.

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