An automatic raw material feeding device for a magnesium smelting vertical reduction furnace

Abstract

The present invention relates to the technical field of vertical reduction furnaces, and more particularly to an automatic raw material feeding device for a vertical reduction furnace for magnesium smelting. The device comprises a feeding group, a feeding displacement mechanism, a valve core, a valve lifting mechanism, and a telescopic hose. The feeding group comprises several feeding hoppers. The feeding displacement mechanism is used to move the feeding group to the feeding hoppers, which are located above a reduction tank to be fed. The bottom ends of the feeding hoppers are connected to one end of a telescopic hose, the other end of which is provided with a positioning flange. The valve lifting mechanism is connected to the valve core and is used to drive the valve core to rise and fall axially along the telescopic hose. The valve core is tapered with the large end facing downward. The maximum diameter of the valve core is larger than the diameter of the center tube and smaller than the inner diameter of the reduction tank. The inner diameter of the positioning flange is smaller than the maximum diameter of the valve core, and the outer diameter of the positioning flange is larger than the inner diameter of the reduction tank. This device mechanizes and automates the feeding operation of the reduction tank, improves the on-site environment, reduces the need for human operators, and improves production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of vertical reduction furnaces, and in particular to an automatic raw material feeding device for a magnesium smelting vertical reduction furnace. Background Art

[0002] At present, magnesium smelting is mainly based on the Pidgeon process, in which calcined dolomite is added to the reduction tank of the reduction furnace and reduced to metallic magnesium by a reducing agent. With the continuous development of magnesium smelting technology, the layout of the reduction tank has gradually changed from horizontal to vertical. The vertical reduction tank has higher reduction efficiency and energy utilization rate, which is more advantageous than the horizontal reduction tank. The reduction furnace equipped with a vertical reduction tank is called a vertical reduction furnace.

[0003] However, due to process and component structure limitations, the vertical reduction tank's raw material loading process requires a series of operations: opening the lid, inserting the center tube cover, adding materials, removing the center tube cover, and closing the lid. Currently, raw material loading is manually performed, and each loading requires 4-5 workers to transport the loading hopper via an overhead crane to the reduction tank inlet to dump the raw materials. During the loading process, the air in the reduction tank is squeezed out, bringing with it a large amount of dust, resulting in extremely serious dust pollution. In addition, the reduction furnace continues to heat during the loading process, and the radiant temperature near the reduction tank inlet is high, resulting in a very harsh working environment for workers. As the market demand for magnesium metal continues to increase, the specifications of the reduction furnace are also increasing. Traditional manual operation will gradually become unable to meet production capacity requirements. Therefore, the mechanization and automation of the charging operation of magnesium smelting vertical reduction furnaces are more urgent. Summary of the Invention

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides an automatic raw material feeding device for a magnesium smelting vertical reduction furnace. By providing a feeding device including a feeding group and a valve core, etc., the mechanization and automation of the feeding operation of the reduction tank are realized, thereby improving the on-site environment, reducing the operation requirements of workers, and improving production efficiency.

[0005] In order to achieve the above objectives, the main technical solutions adopted by the present invention include:

[0006] An automatic raw material feeding device for a magnesium smelting vertical reduction furnace, comprising a feeding group, a feeding displacement mechanism, a valve core, a valve lifting mechanism and a telescopic hose;

[0007] The feeding group includes several feeding hoppers, the feeding displacement mechanism is used to move the feeding group to the feeding hopper and is located above the reduction tank to be fed, the bottom end of the feeding hopper is connected to one end of the telescopic hose, and the other end of the telescopic hose is provided with a positioning flange, the valve lifting mechanism is connected to the valve core, and the valve lifting mechanism is used to drive the valve core to rise and fall along the axial direction of the telescopic hose, the valve core is a cone with the large end downward, the maximum diameter of the valve core is larger than the diameter of the central tube and smaller than the inner diameter of the reduction tank, the inner diameter of the positioning flange is smaller than the maximum diameter of the valve core, and the outer diameter of the positioning flange is larger than the inner diameter of the reduction tank;

[0008] When adding material, the valve lifting mechanism drives the valve core to descend, and the telescopic hose expands as the valve core descends to connect with the positioning flange and the reduction tank port. The valve core descends to cover the center pipe port. When the feeding is stopped, the valve lifting mechanism drives the valve core to rise, and the valve core lifts the positioning flange until the telescopic hose contracts.

[0009] By installing a charging device, including a charging group and valve core, the reduction tank charging operation is mechanized and automated. This reduces the need for manual operation during the reduction furnace operation and shortens workers' working time in high-temperature environments. Continuous automation significantly improves production efficiency to meet the needs of large-scale magnesium smelting production. Furthermore, during the charging process, a telescopic hose connects to the reduction tank opening, significantly reducing dust emissions and improving the on-site environment.

[0010] Furthermore, the feeding displacement mechanism includes a main beam frame, which is connected to both ends of the reduction furnace in the width direction. The main beam frame is provided with a first driving device, which is used to drive the main beam frame to move along the length direction of the reduction furnace. The feeding group is slidingly connected to the main beam frame, and the feeding group is provided with a second driving device, which is used to drive the feeding group to move along the width direction of the reduction furnace.

[0011] By setting up the feeding displacement mechanism, the feeding group is given freedom in two directions, which is suitable for the feeding scenario of reduction tanks arranged in multiple rows and columns, and improves the unloading efficiency.

[0012] Furthermore, a first track is provided at the top of the side wall of the reduction furnace along the width direction, and a first wheel group is provided at the lower end of the main beam frame, and the first wheel group matches the first track; a second track is provided at the top of the main beam frame, and a second wheel group is provided on the side of the feeding group, and the second wheel group matches the second track.

[0013] By setting up matching wheel sets and tracks, the feeding group can move stably.

[0014] Furthermore, a material taking area is provided at one end of the reduction furnace along the length direction. When the charging group needs to replenish raw materials or the charging of the reduction furnace is completed, the charging group moves to the material taking area.

[0015] Furthermore, the reduction tank mouth is provided with a docking flange, the docking flange is provided with a groove, and the bottom edge of the positioning flange is provided with a protrusion, and the docking flange and the positioning flange are engaged during blanking.

[0016] By setting the docking flange and positioning flange that are engaged during unloading, the telescopic hose is limited during unloading, avoiding the problem of slight displacement of the telescopic hose caused by vibration during unloading. The engagement makes the docking tighter, reducing dust emission during feeding.

[0017] Furthermore, the charging displacement mechanism and the valve lifting mechanism are connected to the reduction furnace control system.

[0018] By connecting the charging displacement mechanism and the valve lifting mechanism to the reduction furnace control system, the automation level of the charging device is improved, and more efficient automatic charging is achieved.

[0019] Furthermore, a cover plate is provided on the top of the feeding hopper, thereby reducing the dust emission from the top of the feeding hopper.

[0020] Furthermore, the telescopic hose is made of a high-temperature resistant flexible material.

[0021] Furthermore, the valve lifting mechanism is arranged at the inner center of the feeding hopper.

[0022] Furthermore, the charging group has three charging hoppers arranged in a row along the width of the reduction furnace. By setting up three charging hoppers in a row, it is suitable for an existing reduction furnace with six reduction tanks in a row, and one movement can complete the charging of a row of reduction tanks.

[0023] The beneficial effects of the present invention are:

[0024] The present invention provides an automatic raw material feeding device for a magnesium smelting vertical reduction furnace. By providing a feeding device including a feeding group and a valve core, the feeding operation of the reduction tank is mechanized and automated. This reduces the need for workers to operate the reduction furnace during production and shortens the working time of workers in high-temperature environments. Continuous automated operation can greatly improve production efficiency to meet the needs of large-scale magnesium smelting production. During the feeding process, a telescopic hose is connected to the reduction tank mouth, significantly reducing dust emission during the feeding process and improving the on-site environment. The feeding displacement mechanism enables the feeding group to have two degrees of freedom in different directions, making it suitable for feeding reduction tanks arranged in multiple rows and columns, thereby improving the unloading efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of an automatic raw material feeding device for a magnesium smelting shaft reduction furnace according to the present invention;

[0026] Figure 2This is a front view of an automatic raw material feeding device for a magnesium smelting shaft reduction furnace according to the present invention;

[0027] Figure 3 This is a cross-sectional view of an automatic raw material feeding device for a magnesium smelting shaft reduction furnace according to the present invention;

[0028] Figure 4 This is a schematic diagram of the bottom of the hopper before charging of the present invention;

[0029] Figure 5 This is a schematic diagram of the connection between the charging hopper and the reduction tank during charging of the present invention;

[0030] Figure 6 This is a schematic diagram of the position of the present invention in a reduction furnace workshop.

[0031] In the figure: 1. Main beam; 2. Feeding group; 3. Cover plate; 4. Valve lifting mechanism; 5. Telescopic hose; 6. Positioning flange; 7. Valve core; 8. First drive device; 9. Second drive device; 10. First track; 11. Second track; 12. First wheel group; 13. Second wheel group; 14. Feeding hopper; 15. Center pipe; 16. Reduction tank; 17. Docking flange; 18. Removal area; 19. Reduction furnace. DETAILED DESCRIPTION

[0032] In order to better explain the present invention and facilitate understanding, the present invention will be described in detail below with reference to the accompanying drawings and through specific embodiments. Figure 2 The orientation is referenced.

[0033] Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0034] like Figures 1-6 As shown, an automatic raw material feeding device for a magnesium smelting vertical reduction furnace includes a feeding group 2, a feeding displacement mechanism, a valve core 7, a valve lifting mechanism 4 and a telescopic hose 5;

[0035] The feeding group 2 includes several feeding hoppers 14. The feeding displacement mechanism is used to move the feeding group 2 to the feeding hopper 14 above the reduction tank 16 to be fed. The bottom end of the feeding hopper 14 is connected to one end of the telescopic hose 5. The other end of the telescopic hose 5 is provided with a positioning flange 6. The valve lifting mechanism 4 is connected to the valve core 7. The valve lifting mechanism 4 is used to drive the valve core 7 to rise and fall axially along the telescopic hose 5. The valve core 7 is a cone with the large end facing downward. The maximum diameter of the valve core 7 is larger than the diameter of the center tube 15 and smaller than the inner diameter of the reduction tank 16. The inner diameter of the positioning flange 6 is smaller than the maximum diameter of the valve core 7, and the outer diameter of the positioning flange 6 is larger than the inner diameter of the reduction tank 16.

[0036] When adding material, the valve lifting mechanism 4 drives the valve core 7 to descend, and the telescopic hose 5 is expanded as the valve core 7 descends to connect the positioning flange 6 with the tank mouth of the reduction tank 16. The valve core 7 descends to cover the pipe mouth of the central tube 15. When the feeding is stopped, the valve lifting mechanism 4 drives the valve core 7 to rise, and the valve core 7 lifts the positioning flange 6 until the telescopic hose 5 contracts.

[0037] The provision of a charging device, including charging assembly 2 and valve core 7, allows for mechanized and automated charging of reduction tank 16. This reduces the need for human operators during operation of reduction furnace 19 and shortens their working hours in high-temperature environments. This continuous automation significantly improves production efficiency, meeting the demands of large-scale magnesium smelting production. Furthermore, during the charging process, the flexible hose 5 connects to the opening of reduction tank 16, significantly reducing dust emissions and improving the on-site environment.

[0038] Specifically, the feeding displacement mechanism includes a main beam frame 1, which is connected to both ends of the reduction furnace 19 in the width direction. The main beam frame 1 is provided with a first driving device 8, which is used to drive the main beam frame 1 to move along the length direction of the reduction furnace 19. The feeding group 2 is slidingly connected to the main beam frame 1, and the feeding group 2 is provided with a second driving device 9, which is used to drive the feeding group 2 to move along the width direction of the reduction furnace 19.

[0039] By setting up the feeding displacement mechanism, the feeding group 2 is provided with two degrees of freedom in two directions, which is suitable for the feeding scenario of the reduction tanks 16 arranged in multiple rows and columns, thereby improving the feeding efficiency.

[0040] Specifically, a first track 10 is provided at the top of the side wall of the reduction furnace 19 along the width direction, and a first wheel group 12 is provided at the lower end of the main beam frame 1, and the first wheel group 12 matches the first track 10; a second track 11 is provided at the top of the main beam frame 1, and a second wheel group 13 is provided on the side of the feeding group 2, and the second wheel group 13 matches the second track 11.

[0041] By setting up matching wheel sets and tracks, the feeding group 2 can be stably displaced.

[0042] The first track 10 and the second track 11 can be directional movable tracks such as steel rails and slide rails.

[0043] Specifically, a material taking area 18 is provided at one end of the reduction furnace 19 along the length direction. When the charging group 2 needs to replenish raw materials or the charging of the reduction furnace 19 is completed, the charging group 2 moves to the material taking area 18.

[0044] Specifically, the reduction tank 16 is provided with a docking flange 17 at its mouth. The docking flange 17 is provided with a groove. The bottom edge of the positioning flange 6 is provided with a protrusion. When cutting, the docking flange 17 is engaged with the positioning flange 6.

[0045] By providing the docking flange 17 and the positioning flange 6 that engage during unloading, the telescopic hose 5 is limited during unloading, avoiding the problem of slight displacement of the telescopic hose 5 caused by vibration during unloading, and the engagement makes the docking tighter, reducing dust emission during feeding.

[0046] Specifically, the charging displacement mechanism and the valve lifting mechanism 4 are connected to the reduction furnace 19 control system.

[0047] By connecting the charging displacement mechanism and the valve lifting mechanism 4 to the control system of the reduction furnace 19, the automation level of the charging device is improved, and more efficient automatic charging is achieved.

[0048] The specific method of connecting the charging displacement mechanism and the valve lifting mechanism 4 to the control system of the reduction furnace 19 is a conventional method that can be implemented by those skilled in the art based on the demand and in combination with the existing technology, and will not be repeated here.

[0049] Specifically, a cover plate 3 is provided on the top of the feeding hopper 14. By providing the cover plate 3 on the feeding hopper 14, dust emission from the top of the feeding hopper 14 is reduced.

[0050] Specifically, the telescopic hose 5 is made of a high-temperature resistant flexible material.

[0051] The telescopic hose 5 is a telescopic type, including but not limited to canvas hose, corrugated hose and telescopic sleeve.

[0052] Specifically, the valve lifting mechanism 4 is arranged at the inner center of the feeding hopper 14 .

[0053] The valve lifting mechanism 4 includes but is not limited to a worm gear mechanism, a rack and pinion mechanism, a cylinder and a hydraulic cylinder mechanism, and other mechanisms that can realize the lifting function.

[0054] Specifically, the charging group 2 has three charging hoppers 14 arranged in a row along the width of the reduction furnace 19. By providing a row of three charging hoppers 14, it is adapted to the existing reduction furnace 19 with a row of six reduction tanks 16, and a row of reduction tanks 16 can be charged with one movement.

[0055] The working process of the present invention is:

[0056] The feeding group 2 obtains enough raw materials in the material taking area 18, closes the cover plate 3, and the feeding displacement mechanism moves the feeding group 2 to above the reduction tank 16 to be fed. The valve lifting mechanism 4 drives the valve core 7 to descend. Due to the gravity of the raw materials in the feeding hopper 14, the telescopic hose 5 descends and unfolds with the valve core 7 until the positioning flange 6 docks with the tank mouth of the reduction tank 16, and the valve core 7 descends to cover the pipe mouth of the central tube 15. At this time, there is a gap between the conical surface of the valve core 7 and the inner wall of the reduction tank 16, and the raw materials flow downward along the conical surface through the gap into the reduction tank 16.

[0057] After the feeding is completed, the valve lifting mechanism 4 drives the valve core 7 to rise, and the valve core 7 lifts the positioning flange 6. At this time, the valve core 7 plays a role in sealing the telescopic hose 5. The valve core 7 rises until the telescopic hose 5 contracts, and the feeding displacement mechanism moves the feeding group 2 to above the next part of the reduction tank 16 to be fed.

[0058] The operation continues until the raw materials in the feeding hopper 14 are exhausted or the reduction furnace 19 is fully charged, and the feeding displacement mechanism moves the feeding group 2 to the material taking area 18 to replenish the raw materials and wait for the next round of feeding.

[0059] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An automatic raw material feeding device for a magnesium smelting shaft reduction furnace, characterized in that: It comprises a feeding group (2), a feeding displacement mechanism, a valve core (7), a valve lifting mechanism (4) and a telescopic hose (5); The feeding group (2) includes a plurality of feeding hoppers (14). The feeding displacement mechanism is used to move the feeding group (2) to the feeding hopper (14) so ​​that the feeding hopper (14) is located above the reduction tank (16) to be fed. The bottom end of the feeding hopper (14) is connected to one end of the telescopic hose (5). The other end of the telescopic hose (5) is provided with a positioning flange (6). The valve lifting mechanism (4) is connected to the valve core (7). The valve lifting mechanism (4) is used to drive the valve core (7) to rise and fall along the axial direction of the telescopic hose (5). The valve core (7) is a cone with the large end facing downward. The maximum diameter of the valve core (7) is larger than the diameter of the central tube (15) and smaller than the inner diameter of the reduction tank (16). The inner diameter of the positioning flange (6) is smaller than the maximum diameter of the valve core (7). The outer diameter of the positioning flange (6) is larger than the inner diameter of the reduction tank (16). When adding materials, the valve lifting mechanism (4) drives the valve core (7) to descend, and the telescopic hose (5) expands as the valve core (7) descends until the positioning flange (6) is connected to the tank opening of the reduction tank (16), and the valve core (7) descends to cover the pipe opening of the central tube (15). When the feeding is stopped, the valve lifting mechanism (4) drives the valve core (7) to ascend, and the valve core (7) lifts the positioning flange (6) until the telescopic hose (5) contracts. The feeding displacement mechanism comprises a main beam frame (1), the main beam frame (1) is connected to both ends of the reduction furnace (19) in the width direction, the main beam frame (1) is provided with a first driving device (8), the first driving device (8) is used to drive the main beam frame (1) to move along the length direction of the reduction furnace (19), the feeding group (2) is slidably connected to the main beam frame (1), the feeding group (2) is provided with a second driving device (9), the second driving device (9) is used to drive the feeding group (2) to move along the width direction of the reduction furnace (19).

2. The automatic raw material feeding device for a magnesium smelting shaft reduction furnace according to claim 1, characterized in that: A first track (10) is provided at the top end of the side wall of the reduction furnace (19) in the width direction, a first wheel group (12) is provided at the lower end of the main beam frame (1), and the first wheel group (12) matches the first track (10); a second track (11) is provided at the top end of the main beam frame (1), and a second wheel group (13) is provided on the side of the feeding group (2), and the second wheel group (13) matches the second track (11).

3. The automatic raw material feeding device for a magnesium smelting shaft reduction furnace according to claim 1, characterized in that: The reduction furnace (19) is provided with a material taking area (18) at one end along the length direction. When the feeding group (2) needs to replenish raw materials or the feeding of the reduction furnace (19) is completed, the feeding group (2) moves to the material taking area (18).

4. The automatic raw material feeding device for a magnesium smelting shaft reduction furnace according to claim 1, characterized in that: The reduction tank (16) is provided with a docking flange (17) at its mouth. The docking flange (17) is provided with a groove. The bottom edge of the positioning flange (6) is provided with a protrusion. When blanking, the docking flange (17) is engaged with the positioning flange (6).

5. The automatic raw material feeding device for a magnesium smelting shaft reduction furnace according to claim 1, characterized in that: The feeding displacement mechanism and the valve lifting mechanism (4) are connected to the reduction furnace (19) control system.

6. The automatic raw material feeding device for a magnesium smelting shaft reduction furnace according to claim 1, characterized in that: A cover plate (3) is provided on the top of the feeding hopper (14).

7. The automatic raw material feeding device for a magnesium smelting shaft reduction furnace according to claim 1, characterized in that: The telescopic hose (5) is made of a high-temperature-resistant flexible material.

8. The automatic raw material feeding device for a magnesium smelting shaft reduction furnace according to claim 1, characterized in that: The valve lifting mechanism (4) is arranged at the inner center of the feeding hopper (14).

9. The automatic raw material feeding device for a magnesium smelting shaft reduction furnace according to claim 1, characterized in that: The charging group (2) has three charging hoppers (14), and the three charging hoppers (14) are arranged in a row along the width direction of the reduction furnace (19).

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