Improved taphole stack

Abstract

The utility model discloses an improved iron notch flue device, it includes the straight flue of horizontal arrangement, one end fixed mounting of straight flue is in the position of the iron notch of the electric arc furnace, the other end of straight flue is provided with the inclined flue to the setting of inclining downward, the included angle of straight flue with the inclined flue is acute angle, is provided with the insertion slot to the top of inclined flue and downward, and the water cooling plate subassembly is inserted in the insertion slot, and the prolongation line of iron notch with water cooling plate subassembly intersects, the utility model has the beneficial effects: this utility model simple structure, design the straight flue and the inclined flue of acute angle arrangement, can effectively reduce the horizontal jet velocity of iron notch flue gas, thereby more thoroughly to the flue gas of ironing is sucked and collected, reduces the air pollution in workshop, and simultaneously in the position of the most greatest impact degree of heating degree, the detachable water cooling plate subassembly of inclined flue position design, improves the service life of flue, is worth widely using.

Description

Technical Field

[0001] This utility model relates to the field of ferroalloy smelting technology, and in particular to an improved iron outlet flue device. Background Technology

[0002] Submerged arc furnaces, also known as electric arc furnaces or resistance furnaces, are mainly used for reducing and smelting raw materials such as ores, carbonaceous reducing agents, and solvents. During the iron tapping process, submerged arc furnaces generate a large amount of dust-laden flue gas, especially when the furnace bore is opened or blocked, which can easily lead to gas splashing and the rapid generation of high-concentration dust-laden flue gas. If not collected and purified in time, this can cause significant environmental pollution. Furthermore, the flue gas at the tapping nozzle is characterized by its periodicity and large instantaneous volume; the flue gas jet velocity during tapping can reach 50 m / s. In existing technologies, fume hoods and exhaust ducts are commonly used above the tapping nozzle for flue gas exhaust. However, due to the high horizontal jet velocity of the flue gas during tapping, it is difficult to draw the flue gas upwards, resulting in a large amount of flue gas escaping and incomplete extraction. Therefore, this invention provides an improved tapping nozzle flue device. Utility Model Content

[0003] The purpose of this invention is to provide an improved iron tapping flue device to solve the technical problem of incomplete suction in existing iron tapping flues.

[0004] The utility model discloses an improved iron tapping flue device, comprising a horizontally arranged straight flue, one end of which is fixedly installed at the iron tapping location of an electric arc furnace, and the other end of which is inclined to a downward angle with an acute angle between the straight flue and the inclined flue. A slot is formed downward at the top of the inclined flue, and a water-cooled plate assembly is inserted into the slot. The extension line of the iron tapping location intersects with the water-cooled plate assembly. A suction duct is vertically connected to the top of the straight flue, and several suction through holes are formed on the top surface of the straight flue, allowing the straight flue and the suction duct to communicate with each other.

[0005] Furthermore, the angle between the straight flue and the inclined flue is 70°.

[0006] Furthermore, the water-cooled plate assembly includes a water-cooled plate that is slidably inserted into the slot. A water-cooling channel is provided inside the water-cooled plate. An inlet pipe and an outlet pipe are connected to the top of the water-cooled plate, and both the inlet pipe and the outlet pipe are connected to the water-cooling channel.

[0007] Furthermore, a water-cooling tank is formed inside the water-cooling plate, and several partitions are installed inside the water-cooling tank. Water passage holes are formed on the partitions, and a sealing cover is fixedly covered on the water-cooling tank. The water-cooling tank, the partitions, the water passage holes, and the sealing cover form the water-cooling flow channel.

[0008] Furthermore, the water-cooling channel is a zigzag shape.

[0009] Furthermore, the inner surface of the water-cooled plate is wavy, and the inner wall of the slot is slidably fitted with the water-cooled plate.

[0010] Furthermore, a notch is vertically downward at the top of the inclined flue, the notch is connected to the slot, and a positioning rod is connected to the sealing cover plate, the positioning rod is slidably connected to the notch.

[0011] The beneficial effects of this utility model are as follows: This utility model has a simple structure and is designed with straight and inclined flues arranged at acute angles, which can effectively reduce the horizontal jet velocity of the flue gas at the tapping iron, thereby more thoroughly extracting and collecting the flue gas during tapping iron, reducing air pollution in the workshop. At the same time, a detachable water-cooled plate assembly is designed at the inclined flue position where the heat and impact are greatest, which improves the service life of the flue. It is worth promoting and using on a large scale. Attached Figure Description

[0012] Figure 1 This is a perspective view of the present invention;

[0013] Figure 2 This is a top view of the present invention;

[0014] Figure 3 for Figure 2 Sectional view along AA;

[0015] Figure 4 This is a 3D view of the water-cooled plate assembly;

[0016] In the diagram, there are: 1. Straight flue; 2. Inclined flue; 3. Slot; 4. Water-cooled plate; 5. Water-cooled tank; 6. Partition; 7. Water-cooled flow channel; 8. Inlet pipe; 9. Outlet pipe; 10. Sealing cover; 11. Positioning rod; 12. Notch; 13. Suction through hole; 14. Suction flue; 15. Iron outlet; and 16. Water passage hole. Detailed Implementation

[0017] In existing technologies, the high-speed horizontal jet flue gas generated during the tapping process of electric arc furnaces is difficult to collect effectively using vertical suction methods. Existing flue gas devices suffer from severe flue gas escape due to structural limitations. Traditional fume hoods cannot adapt to the movement characteristics of instantaneous large-volume flue gas, especially when the furnace borehole is opened or blocked, high-concentration dust-laden flue gas spreads rapidly, causing environmental pollution.

[0018] Therefore, as Figures 1 to 3As shown, this application proposes an improved taphole flue device, which includes a horizontally arranged straight flue 1. One end of the straight flue 1 is fixedly installed at the taphole 15 of the submerged arc furnace. The other end of the straight flue 1 is inclined to a downward angle with a sloping flue 2. The angle between the straight flue 1 and the sloping flue 2 is an acute angle. A slot 3 is formed downward at the top of the sloping flue 2, and a water-cooled plate assembly is inserted into the slot 3. The extension line of the taphole 15 intersects with the water-cooled plate assembly. A vertical connection is made at the top of the straight flue 1. A smoke extraction duct 14 is connected to the straight flue 1, and an induced draft fan is installed on the smoke extraction duct 14. Several suction through holes 13 are opened on the top surface of the straight flue 1, and the suction through holes 13 connect the straight flue 1 and the smoke extraction duct 14. The angle between the straight flue 1 and the inclined flue 2 is 70°. Specifically, when high-speed flue gas is generated at the tap hole of the electric arc furnace, the flue gas moves horizontally in the straight flue and is gradually changed in flow direction by the constraint of the inclined wall of the inclined flue, reducing the horizontal momentum, so that the flue gas can smoothly enter the subsequent processing system.

[0019] like Figure 3 and Figure 4 As shown, the water-cooled plate assembly includes a water-cooled plate 4, which is slidably inserted into the slot 3. A water-cooling channel 7 is provided within the water-cooled plate 4. An inlet pipe 8 and an outlet pipe 9 are connected to the top of the water-cooled plate 4, and both the inlet pipe 8 and the outlet pipe 9 are connected to the water-cooling channel 7. Specifically, the water-cooled plate 4 is slidably inserted into the slot 3 of the inclined flue 2. Cooling water enters the water-cooling channel through the inlet pipe 8, flows along a zigzag path, and is discharged from the outlet pipe 9. During the tapping process of the submerged arc furnace, when the high-temperature flue gas comes into contact with the water-cooled plate, the heat is continuously carried away by the cooling water in the channel, preventing the water-cooled plate from deforming or burning due to high temperature. At the same time, the sliding fit structure between the water-cooled plate 4 and the slot 3 allows for quick disassembly and replacement during maintenance without interrupting the overall flue structure.

[0020] like Figure 4As shown, a water-cooling groove 5 is formed within the water-cooling plate 4, and several partitions 6 are installed within the water-cooling groove 5. Water passage holes 16 are formed on the partitions 6. A sealing cover 10 is fixedly placed over the water-cooling groove 5. To increase sealing, a sealing ring can be provided on the sealing cover 10. The water-cooling groove 5, the partitions 6, the water passage holes 16, and the sealing cover 10 form the water-cooling flow channel 7. The water-cooling flow channel 7 is a zigzag shape. Compared with existing technologies, traditional water-cooling plates mostly use a straight-through water pipe structure, resulting in uneven distribution of cooling water flow velocity and limited contact area. The design increases the turbulence of cooling water and enhances heat exchange efficiency through the zigzag flow channel formed by the partition and water passage. In addition, the combination structure of the sealing cover and the partition simplifies the processing technology of the water cooling channel and is easier to maintain compared with integral casting or complex welding structures. The inner side of the water cooling plate 4 is wavy, and the inner wall of the slot 3 slides and fits against the water cooling plate 4. Specifically, when the water cooling plate is inserted into the slot, its undulating structure extends the cooling water flow path and increases the heat dissipation area. At the same time, the inner wall of the slot and the outer surface of the water cooling plate form a gapless sliding fit, which improves the cooling efficiency.

[0021] like Figure 1 As shown, a notch 12 is vertically downward at the top of the inclined flue 2. The notch 12 is connected to the slot 3. A positioning rod 11 is connected to the sealing cover 10. The positioning rod 11 is slidably connected to the notch 12. Compared with the prior art, the water-cooled plate assembly of the traditional flue device lacks a positioning structure. When inserting or removing, uneven force can easily cause the sealing cover to tilt or misalign, which in turn affects the sealing performance of the water-cooled flow channel. This solution forms a mechanical limit in the vertical direction through the sliding cooperation of the notch and the positioning rod, which not only ensures the stability of the water-cooled plate assembly after installation, but also simplifies the disassembly and assembly process.

[0022] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An improved iron tapping flue device, characterized in that: It includes a horizontally arranged straight flue (1), one end of which is fixedly installed at the iron tapping port (15) of the electric arc furnace, and the other end of which is inclined to a downward angled flue (2). The angle between the straight flue (1) and the inclined flue (2) is an acute angle. A slot (3) is opened downward at the top of the inclined flue (2), and a water-cooled plate assembly is inserted into the slot (3). The extension line of the iron tapping port (15) intersects with the water-cooled plate assembly. A suction duct (14) is vertically connected to the top of the straight flue (1). Several suction through holes (13) are opened on the top surface of the straight flue (1), and the suction through holes (13) connect the straight flue (1) and the suction duct (14).

2. The improved iron tapping flue device according to claim 1, characterized in that: The angle between the straight flue (1) and the inclined flue (2) is 60° to 80°.

3. An improved iron tapping flue device according to claim 1, characterized in that: The water-cooled plate assembly includes a water-cooled plate (4), which is slidably inserted into the slot (3). A water-cooled flow channel (7) is provided in the water-cooled plate (4). An inlet pipe (8) and an outlet pipe (9) are connected to the top of the water-cooled plate (4). The inlet pipe (8) and the outlet pipe (9) are both connected to the water-cooled flow channel (7).

4. An improved iron tapping flue device according to claim 3, characterized in that: A water-cooling tank (5) is provided in the water-cooling plate (4), and several partitions (6) are installed in the water-cooling tank (5). Water passage holes (16) are provided on the partitions (6), and a sealing cover plate (10) is fixedly covered on the water-cooling tank (5). The water-cooling tank (5), the partitions (6), the water passage holes (16), and the sealing cover plate (10) form the water-cooling flow channel (7).

5. An improved iron tapping flue device according to claim 4, characterized in that: The water-cooled flow channel (7) is a broken line shape.

6. An improved iron tapping flue device according to claim 4, characterized in that: The inner side of the water-cooled plate (4) is wavy, and the inner wall of the slot (3) slides and fits against the water-cooled plate (4).

7. An improved iron tapping flue device according to claim 4, characterized in that: A notch (12) is vertically downward at the top of the inclined flue (2). The notch (12) is connected to the slot (3). A positioning rod (11) is connected to the sealing cover (10). The positioning rod (11) is slidably connected to the notch (12).

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