Blast furnace forehearth iron scrap charging device

Abstract

This utility model discloses a blast furnace front scrap iron feeding device, including a forklift and a baffle. The forklift has two forks, and the baffle includes a main plate and a base plate. The base plate is inclined towards the back of the main plate. Two tubular arms are provided on the back of the main plate, each corresponding to one of the forklift's two forks. The forklift's forks are inserted into the corresponding tubular arms. Side plates are fixed to both sides of the baffle, and the two side plates and the baffle form a U-shaped body with an opening. The opening and the tubular arms are located on opposite sides of the baffle. This utility model blast furnace front scrap iron feeding device, by setting the baffle and using the forklift to feed scrap iron, saves time and labor, has high feeding efficiency, saves labor costs, and avoids the safety hazards caused by manual operation in high-temperature environments. Furthermore, the forklift is easy to use, eliminating the need for a separate, accurate, and dedicated feeding device, greatly saving equipment costs.

Description

Technical Field

[0001] This utility model relates to the technical field of blast furnace charging equipment, and in particular to a blast furnace front iron crushing charging device. Background Technology

[0002] Currently, steel companies must continuously optimize their production processes, reduce production costs, and improve production efficiency to maintain competitiveness. Among these efforts, cost control and efficiency improvement are particularly important in blast furnace ironmaking, which is the core link in steel production.

[0003] In traditional blast furnace ironmaking, production costs are high, especially in terms of energy consumption and raw material costs. In recent years, with market changes, the price of scrap iron has gradually fallen below the production cost of blast furnace iron. This provides steel companies with a new approach and opportunity to increase output and reduce fuel consumption by purchasing scrap iron and adding it to the blast furnace. Adding scrap iron to the furnace along with raw materials via charging cars or conveyor belts can improve blast furnace efficiency to some extent and bring considerable economic benefits. However, adding scrap iron to the furnace consumes additional heat. To maintain thermal balance within the blast furnace, coke is typically added at a ratio of approximately 3:1, meaning 30 kg of coke is needed for every 100 kg of scrap iron added. While this coke-addition method ensures the normal operation of the blast furnace, it also increases coke consumption, thereby raising production costs and offsetting some of the economic benefits brought by scrap iron.

[0004] To further optimize this process, it is proposed to add scrap iron directly into the blast furnace trench. The trench serves as a flow channel for molten iron to enter the ladle. When the scrap iron is added, the heat of the molten iron directly melts it, mixing it with the iron and flowing into the ladle together, thus completing the addition of the scrap iron. Compared to the traditional method of adding coke, this direct addition method is more energy-efficient and reduces consumption, further lowering production costs and improving the economic and environmental benefits of blast furnace ironmaking.

[0005] Although adding scrap iron directly into the blast furnace trenches offers significant energy-saving and consumption-reducing advantages, in practice, the traditional method relies mainly on manual shoveling. This manual method is not only time-saving and labor-intensive, but also slow and inefficient, failing to quickly complete the scrap iron addition process and easily affecting the blast furnace's production rhythm and efficiency. Furthermore, the complex environment in front of the furnace, with its high temperatures and dust hazards, makes manual operation prone to safety accidents, posing a threat to the health and safety of workers. Utility Model Content

[0006] The purpose of this utility model is to provide a blast furnace front iron crushing and feeding device.

[0007] The technical solution to achieve the purpose of this utility model is: a blast furnace front iron crushing and charging device, including a forklift and a baffle. The forklift has two forks. The baffle includes a main plate and a bottom plate. The main plate is upright, and the bottom plate is located at the bottom of the main plate. The upper end of the bottom plate is connected to the lower end of the main plate. The bottom plate is inclined towards the back of the main plate. The back of the main plate is provided with two tube arms, which are arranged horizontally at intervals. The first end of each tube arm is fixedly connected to the back of the main plate. The second end of each tube arm is fixedly connected to the back of the main plate. Both ends are open, and the two tube arms correspond one-to-one with the two forks of the forklift. The forklift forks are inserted into the corresponding tube arms. Each tube arm also has a threaded hole, and a screw is inserted into the threaded hole. The screw is threaded into the threaded hole and fixed to the forklift forks inside the tube arm. Side plates are fixed on both sides of the baffle. The two side plates and the baffle form a U-shaped body with an opening. The opening and the tube arm are located on the two sides of the baffle, respectively.

[0008] Furthermore, the included angle α between the main board and the base plate is any value between 105° and 155°. When the included angle α between the main board and the base plate is too large, the positive components of the reverse thrust of the scrap iron and the frictional force between the scrap iron and the ground in the direction perpendicular to the base plate are relatively large. Under this large positive force, the base plate is relatively more prone to bending and deformation. When the included angle α between the main board and the base plate is too small, rolling friction easily forms between the base plate and the scrap iron, resulting in the scrap iron not being pushed away cleanly. When the included angle α between the main board and the base plate is any value between 105° and 155°, it can ensure that the positive force on the base plate is smaller and less prone to deformation, while at the same time, the scrap iron at the bottom can be pushed away more cleanly.

[0009] Furthermore, the two side plates are arranged in a V-shape with flared openings. With this arrangement, the two side plates and the baffle can not only form a U-shaped body to prevent the broken iron from spilling out from both sides when pushing it, but more importantly, the V-shaped flared structure increases the total lateral width of the two side plates and the baffle, resulting in a larger pushing surface and a larger single pushing volume when pushing broken iron.

[0010] Furthermore, the included angle β between the side plate and the baffle is any value between 115° and 145°. When the included angle β between the side plate and the baffle is too large, the side plate has a weaker restraining effect on the broken iron; conversely, the broken iron is more likely to spill out from the side. When the included angle β between the side plate and the baffle is too small, the total lateral width of the side plate and the baffle is also relatively smaller, which has a smaller effect on increasing the pushing surface and the amount of pushing in a single push. When the included angle β between the side plate and the baffle is any value between 115° and 145°, it can ensure good restraint and anti-spillage effect on the broken iron, while also allowing for a relatively large pushing surface and a relatively large amount of pushing in a single push.

[0011] Furthermore, the baffle is provided with reinforcing ribs on its front side. The addition of these reinforcing ribs enhances the structural strength of the baffle.

[0012] Furthermore, the reinforcing ribs are in a mesh shape. Besides increasing the structural strength of the baffle, the mesh-shaped reinforcing ribs, more importantly, form a protective layer when the broken iron is trapped within them during the pushing process. When the baffle pushes the broken iron, the impact is felt on the trapped iron within the mesh, rather than on the baffle itself. The trapped iron protects the baffle and reduces wear.

[0013] Furthermore, the tubular arm is a square tube adapted to the forks.

[0014] This utility model relates to a blast furnace front scrap iron feeding device. By setting up a baffle, two tubular arms are installed on the back of the baffle. These tubular arms are then fitted onto the forks of a forklift. The screws on the tubular arms secure the forklift's forks. Using the power of the forklift, the baffle acts as a pusher, simultaneously propelling the scrap iron into the groove in front of the blast furnace. Forklifts are common in steel plants. This utility model, with its baffle, allows for the use of forklifts to feed scrap iron. Using a forklift for scrap iron feeding offers several advantages. Firstly, compared to manual shoveling, it saves time and labor, increases feeding efficiency, reduces labor costs, and avoids the safety hazards associated with manual operation in high-temperature environments. Secondly, the forklift is convenient to use, eliminating the need for a separate, precise, and dedicated feeding device, significantly reducing equipment costs.

[0015] This utility model relates to a blast furnace front iron crushing and charging device. The tube arm is installed on the back of the baffle. The installation of the tube arm and the fixing of the screw allow for the connection between the baffle and the forks of the forklift. In this installation structure, the tube arm limits the forks circumferentially, and the screw limits the forks lengthwise. With the tube arm and screw combined, the screw only needs simple tightening to achieve a secure and reliable installation between the baffle and the forklift forks. The installation operation is convenient and labor-saving. Furthermore, depending on the usage, the screw can be rotated at any time to flexibly detach and reassemble the baffle from the forklift.

[0016] During the process of pushing crushed iron, the upper part of the baffle is mainly subjected to the reverse force of the crushed iron, while the lower part of the baffle, in addition to the reverse force of the crushed iron, is also subjected to the frictional force of the ground where the crushed iron is piled up. The lower part of the baffle experiences relatively greater force. In view of this situation, the blast furnace front crushed iron charging device of this utility model, by having the baffle, including the main plate and the bottom plate, and the bottom plate being inclined to one side of the back of the main plate, decomposes the originally large force acting on the bottom plate, reducing the positive force in the vertical direction on the bottom plate. The bottom plate at the bottom of the baffle is less likely to deform due to excessive force, resulting in better structural stability.

[0017] The present invention relates to a blast furnace front iron crushing and feeding device, wherein side plates are fixed on both sides of the baffle. After the two side plates and the baffle form a U-shaped body, a relatively stable accommodating cavity is formed within the U-shaped body. When pushing iron crushing and adding iron crushing into the trough in front of the blast furnace, the amount of iron crushing added each time is more stable and reliable, which facilitates the control of the amount and speed of addition. Attached Figure Description

[0018] Figure 1 This is a top view schematic diagram of the blast furnace front iron crushing and charging device of this utility model;

[0019] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure along line AA;

[0020] Figure 3 This is a schematic diagram of the back structure of the baffle of the blast furnace front iron crushing and charging device of this utility model;

[0021] Figure 4 This is a schematic diagram of the front structure of the baffle of the blast furnace front iron crushing and charging device of this utility model. Detailed Implementation

[0022] The preferred embodiment of the blast furnace front iron crushing and charging device of this utility model will be described in detail below with reference to the accompanying drawings:

[0023] like Figures 1 to 4As shown, a blast furnace front iron crushing and charging device includes a forklift 1 and a baffle 2. The forklift 1 has two forks 11. The baffle 2 includes a main plate 21 and a base plate 22. The main plate 21 is upright, and the base plate 22 is located at the bottom of the main plate 21. The upper end of the base plate 22 is connected to the lower end of the main plate 21. The base plate 22 is inclined towards the back of the main plate 21. The back of the main plate 21 is provided with two tube arms 20, which are arranged horizontally at intervals. The first end 201 of each tube arm 20 is fixedly connected to the back of the main plate 21, and the second end 202 of each tube arm 20 is open. The two tube arms 20 correspond one-to-one with the two forks 11 of the forklift 1. The forks 11 of the forklift 1 are inserted into the corresponding tube arms 20. Each tube arm 20 is also provided with a threaded hole 203. A screw 204 passes through the threaded hole 203 and is threaded into the threaded hole 203. The screw 204 is fixed to the forks 11 of the forklift 1 inside the tube arm 20. Side plates 3 are fixed on both sides of the baffle 2. The two side plates 3 and the baffle 2 form a U-shaped body. The U-shaped body has an opening 31. The opening 31 and the tube arm 20 are respectively located on both sides of the baffle 2.

[0024] This utility model relates to a blast furnace front iron crushing and charging device. The forklift 1 has two forks 11. When the forklift 1 transports items, the forks 11 extend under the items to lift them up, and then the forklift 1 moves to complete the transport. The forklift 1 is an existing structure, and this utility model will not elaborate further on it.

[0025] In this utility model, a blast furnace front iron crushing and charging device is described. In the baffle 2, the two tube arms 20 on the back of the main plate 21 correspond one-to-one with the two forks 11 of the forklift 1. The forks 11 of the forklift 1 are inserted into the corresponding tube arms 20. At the same time, the screw 204 rotates to fix the forks 11 in the tube arms 20. The baffle 2 is then connected to the forks 11 of the forklift 1 and fixed to the forks 11 of the forklift 1.

[0026] This utility model relates to a blast furnace front crushed iron charging device, used in the process of adding crushed iron to the blast furnace front trench. When adding crushed iron to the blast furnace front trench, the trench cover is opened and the crushed iron is poured onto the trench cover; then, the forklift 1 is driven, and the baffle 2 is used to push the crushed iron on the trench cover into the blast furnace front trench. When the baffle 2 pushes the broken iron, the main plate 21 provides the main pushing surface. The main plate 21 is located above the base plate 22. The main plate 21 is mainly subjected to the reverse force of the broken iron. When the base plate 22, located below the main plate 21, is in use, it contacts the ground where the broken iron is piled (the surface of the cover plate). In addition to the reverse force of the broken iron, the base plate 22 is also subjected to the frictional force of the ground where the broken iron is piled. The force on the base plate 22 is relatively large. In this case, the base plate 22 is tilted. After the base plate 22 is tilted, the force on the base plate 22 (the reverse force of the broken iron and the frictional force of the ground where the broken iron is piled) forms a component in the direction perpendicular to the base plate 22. After the component is reduced, the positive force on the base plate 22 in the vertical direction is reduced. After the positive force is reduced, the base plate 22 is less prone to deformation and the structural stability is better.

[0027] This utility model relates to a blast furnace front scrap iron feeding device. By setting up a baffle 2, two tubular arms 20 are installed on the back of the baffle 2. The two tubular arms 20 are fitted onto the forks 11 of a forklift 1, and the screws 204 on the tubular arms 20 secure them to the forks 11. Using the power of the forklift 1, the baffle 2 acts as a pusher, simultaneously pushing the scrap iron into the groove in front of the blast furnace. Forklifts 1 are common in steel plants. This utility model's blast furnace front scrap iron feeding device, with the baffle 2, allows for the use of these common steel plant forklifts to feed scrap iron. When using the forklift 1 to feed scrap iron, on the one hand, compared with manual shoveling and feeding, it saves time and labor, has high feeding efficiency, saves labor costs, and avoids the safety hazards caused by manual operation in high-temperature environments; on the other hand, the forklift 1 is easy to use, which not only improves the utilization rate of the forklift 1, but also eliminates the need for a separate accurate and dedicated feeding device during the scrap iron feeding process, greatly saving equipment costs.

[0028] This utility model relates to a blast furnace front iron crushing and charging device. A tube arm 20 is installed on the back of the baffle 2. The installation of the tube arm 20 and the fixing of the screw 204 achieves the connection between the baffle 2 and the forks 11 of the forklift 1. In this installation structure, the tube arm 20 limits the forks 11 circumferentially, and the screw 204 limits the forks 11 lengthwise. With the tube arm 20 and the screw 204 combined, the screw 204 only needs simple tightening to achieve a secure and reliable installation between the baffle 2 and the forks 11 of the forklift 1. The installation operation is convenient and labor-saving. Furthermore, depending on the usage, the screw 204 can be rotated at any time to flexibly detach and reassemble the baffle 2 from the forklift 1.

[0029] During the process of pushing crushed iron, the upper part of the baffle 2 is mainly subjected to the reverse force of the crushed iron, while the lower part of the baffle 2 is subjected to the reverse force of the crushed iron and the friction force of the ground where the crushed iron is piled up. The lower part of the baffle 2 is subjected to relatively greater force. In view of this situation, the blast furnace front crushed iron charging device of this utility model, by making the baffle 2 include the main plate 21 and the bottom plate 22, and the bottom plate 22 is inclined to one side of the back of the main plate 21, the originally large force acting on the bottom plate 22 is decomposed, the positive force on the bottom plate 22 in the vertical direction is reduced, the bottom plate 22 at the bottom of the baffle 2 is not easy to deform due to excessive force, and the structural stability is better.

[0030] This utility model relates to a blast furnace front iron crushing and charging device. Both sides of the baffle 2 are fixed with side plates 3. When the two side plates 3 and the baffle 2 form a U-shaped body, a relatively stable accommodating cavity is created within this U-shaped body. When pushing iron crushing materials into the groove in front of the blast furnace, the amount of iron crushing materials added each time is more stable and reliable, facilitating the control of the addition amount and speed. The U-shaped body is a structure similar to a U-shape.

[0031] In this utility model of a blast furnace front-end iron crushing and charging device, preferably, the included angle α between the main plate 21 and the bottom plate 22 is any value between 105° and 155°. When the included angle α between the main plate 21 and the bottom plate 22 is too large, the positive components of the reverse thrust of the iron crushing and the frictional force between the iron crushing and the ground in the direction perpendicular to the bottom plate 22 are relatively large. Under this large positive force, the bottom plate 22 is relatively more prone to bending and deformation. When the included angle α between the main plate 21 and the bottom plate 22 is too small, rolling friction easily forms between the bottom plate 22 and the iron crushing, resulting in the iron crushing not being pushed cleanly. When the included angle α between the main plate 21 and the bottom plate 22 is any value between 105° and 155°, it can ensure that the positive force on the bottom plate 22 is smaller and less prone to deformation, while at the same time, the iron crushing at the bottom can be pushed more cleanly.

[0032] In this utility model of a blast furnace front iron crushing and charging device, preferably, the two side plates 3 are arranged in a V-shape with flared openings. With this arrangement, the two side plates 3 and the baffle 2 not only form a U-shaped structure, preventing iron crushing from overflowing from both sides when pushing the iron, but more importantly, the V-shaped flared structure increases the total lateral width of the two side plates 3 and the baffle 2, resulting in a larger pushing surface and a larger single pushing volume when pushing the iron.

[0033] In this utility model of a blast furnace front-end iron crushing and charging device, preferably, the included angle β between the side plate 3 and the baffle 2 is any value between 115° and 145°. When the included angle β between the side plate 3 and the baffle 2 is too large, the side plate 3 has a weaker restraining effect on the iron crushing and charging; conversely, the iron crushing and charging is more likely to overflow from the side. When the included angle β between the side plate 3 and the baffle 2 is too small, the total lateral width of the side plate 3 and the baffle 2 is also relatively smaller, which has a smaller effect on increasing the pushing surface and the amount of iron pushed at one time. When the included angle β between the side plate 3 and the baffle 2 is any value between 115° and 145°, it can ensure good restraint and anti-overflow effect on the iron crushing and charging, while also allowing for a relatively large pushing surface and a relatively large amount of iron pushed at one time.

[0034] In this utility model of a blast furnace front iron crushing and charging device, preferably, the front side of the baffle 2 is provided with reinforcing ribs 23. The reinforcing ribs 23 can enhance the structural strength of the baffle 2.

[0035] In this utility model of a blast furnace front iron crushing and charging device, preferably, the reinforcing ribs 23 are mesh-shaped. Iron crushings are trapped within the mesh of the reinforcing ribs 23, forming a protective layer. Besides increasing the structural strength of the baffle 2, the mesh-shaped reinforcing ribs 23, more importantly, during the pushing of iron crushings, the iron crushings, after being trapped within the mesh-shaped reinforcing ribs 23, also form a protective layer. When the baffle 2 pushes the iron crushings and interacts with them, the iron crushings act on the iron crushings trapped within the mesh, rather than on the baffle 2 itself. The iron crushings trapped within the mesh protect the baffle 2, reducing wear on the baffle 2.

[0036] In this utility model, the blast furnace front iron crushing and feeding device preferably has a tube arm 20 that is adapted to the fork 11.

[0037] For those skilled in the art to which this utility model pertains, several simple deductions or substitutions can be made without departing from the concept of this utility model, and all such deductions or substitutions should be considered to fall within the protection scope of this utility model.

Claims

1. A blast furnace front-end iron crushing and charging device, characterized in that: The system includes a forklift and a baffle. The forklift has two forks. The baffle includes a main plate and a base plate. The main plate is upright, and the base plate is located at the bottom of the main plate. The upper end of the base plate is connected to the lower end of the main plate. The base plate is inclined towards the back of the main plate. The back of the main plate has two tubular arms arranged horizontally at intervals. The first end of each tubular arm is fixedly connected to the back of the main plate, and the second end of each tubular arm is open. The two tubular arms correspond one-to-one with the two forks of the forklift. The forks of the forklift are inserted into the corresponding tubular arms. Each tubular arm also has a threaded hole, and a screw is inserted into the threaded hole. The screw is threaded into the threaded hole and fixed to the forklift forks inside the tubular arm. Side plates are fixed on both sides of the baffle. The two side plates and the baffle form a U-shaped body with an opening. The opening and the tubular arms are located on opposite sides of the baffle.

2. The blast furnace front iron crushing and charging device according to claim 1, characterized in that: The included angle α between the motherboard and the base plate is any value between 105° and 155°.

3. The blast furnace front iron crushing and charging device according to claim 1, characterized in that: Both side panels are designed with a V-shaped flare.

4. The blast furnace front iron crushing and charging device according to claim 3, characterized in that: The included angle β between the side plate and the baffle is any value between 115° and 145°.

5. The blast furnace front iron crushing and charging device according to claim 1, characterized in that: The front side of the baffle is provided with reinforcing ribs.

6. The blast furnace front iron crushing and charging device according to claim 5, characterized in that: The reinforcing ribs are in the form of a mesh.

7. The blast furnace front iron crushing and charging device according to claim 1, characterized in that: The tubular arm is a square tube adapted to the forks.

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