Converter dust screening and recycling device

Abstract

The utility model relates to the field of converter dust recycling equipment, and discloses a converter dust screening and recycling device which comprises an installation box, a smashing mechanism, a first screening mechanism, a magnetic attraction mechanism, a second screening mechanism and a driving mechanism. The crushing mechanism is arranged at the top of the mounting box and used for crushing dust; the first screening mechanism, the magnetic attraction mechanism and the second screening mechanism are sequentially arranged in the mounting box from top to bottom, the first screening mechanism is used for screening out blocky dust, and the driving mechanism is mounted on the mounting box and used for driving the first screening mechanism and the second screening mechanism to work; according to the scheme, dust is collected and cooled and then is subjected to dry-method centralized recovery treatment, a waterway system and a cooling device are not needed, and the cost can be effectively reduced; according to the scheme, the screening-adsorption-screening structure is adopted, large blocky dust can be screened out through the first screening mechanism, the situation that the large blocky dust affects the magnetic attraction mechanism so that the magnetic attraction mechanism can have good adsorption force can be avoided, and the recovery rate of iron powder particles can be effectively increased.

Description

Technical Field

[0001] The utility model relates to the field of converter dust recovery equipment, and more specifically, to a converter dust screening and recovery device. Background Art

[0002] In the converter steelmaking process, the converter flue gas contains a large amount of dust, with the highest concentration reaching 150g / Nm3. The main components of dust ash are iron oxide, calcium oxide and silicon dioxide, among which the iron oxide content is as high as 50% to 60%. The dust ash discharged into the air poses a threat to the environment, but if used as a converter metallurgical raw material, it is a precious resource. Therefore, the utilization of converter dust ash in the steelmaking field has always been a major issue facing the steelmaking industry.

[0003] The utility model patent with authorization announcement number CN219363689U discloses a device for recycling converter dust removal ash, which relates to the technical field of converter dust removal ash processing, including a main body, a water tank is arranged on one side of the main body, a high-pressure water pump is arranged on one side of the water tank, a dust reduction device is arranged on one side of the high-pressure water pump, a filtering device is arranged at the lower end of the dust reduction device, and a cooling device is arranged on one side of the filtering device; when the dust discharge pipe discharges the dust removal ash into the dust reduction box, the high-pressure water pump is started at the same time, so that the water in the water tank enters the inner cavity of the connecting pipe through the water delivery pipe, and then is evenly sprayed into the inner cavity of the dust reduction box through the high-pressure nozzle, and then the motor is driven, the output end of the motor drives the stirring shaft to rotate, the stirring shaft drives the stirring rod to rotate, and the converter dust removal ash and the dust reduction water sprayed by the high-pressure nozzle are evenly mixed into one through the rotation of the stirring rod, and the dust removal ash is driven to fall under the action of the gravity of the water, so as to facilitate the subsequent filtering, collection and treatment of the dust removal ash.

[0004] The electromagnet in the above scheme is fixed on the stirring shaft, and absorbs the iron powder particles in the smoke by stirring. The rotation of the electromagnet will generate centrifugal force, which will weaken its adsorption ability for the iron powder particles and reduce the recovery rate of the iron powder particles. Some larger agglomerates of ash in the dust will adhere to the electromagnet, which will weaken the adsorption ability of the electromagnet for the iron powder particles and reduce the recovery rate of the iron powder particles. Utility Model Content

[0005] The utility model aims to overcome at least one defect of the above-mentioned prior art and provide a converter dust screening and recovery device for solving the technical problem that some larger aggregated dust clumps adhere to the electromagnet, resulting in the weakening of the electromagnet's adsorption capacity for iron powder particles and a low recovery rate of the iron powder particles.

[0006] The technical solution adopted by the utility model is a converter dust screening and recovery device, comprising an installation box, a crushing mechanism, a first screening mechanism, a magnetic attraction mechanism, a second screening mechanism and a driving mechanism; the crushing mechanism is arranged on the top of the installation box, and is used to crush the dust; the first screening mechanism, the magnetic attraction mechanism, and the second screening mechanism are arranged in the installation box from top to bottom, the first screening mechanism is used to screen out the agglomerated dust, and the driving mechanism is installed on the installation box, and is used to drive the first screening mechanism and the second screening mechanism to work.

[0007] The collected converter smoke is first added to the pulverizing mechanism for pulverization, and then enters the installation box. The gathered agglomerated dust is first screened out through the first screening mechanism to prevent larger agglomerated dust from affecting the adsorption of iron powder particles by the magnetic suction mechanism. The screened dust falls through the magnetic suction mechanism, and the magnetic suction mechanism adsorbs the iron powder particles therein to achieve the recovery of the iron powder in the smoke. Then, it passes through the second screening mechanism and falls into the collection box below. The second screening mechanism is used to filter out some iron powder particles that are not adsorbed by the magnetic suction mechanism to further improve the recovery rate of the iron powder particles. The agglomerated dust can be collected again and added to the pulverizing mechanism to be pulverized again.

[0008] This solution is to collect and cool the dust and conduct dry centralized recycling treatment. It does not require a water system or cooling equipment, which can effectively reduce costs. This solution adopts a "screening-adsorption-screening" structure, and can screen out larger dust clumps through the first screening mechanism, which can prevent larger dust clumps from affecting the magnetic suction mechanism so that the magnetic suction mechanism has better adsorption force, and can effectively improve the recovery rate of iron powder particles.

[0009] Furthermore, the magnetic attraction mechanism includes a sliding frame, an electromagnet and an iron grid, the sliding frame is slidably connected to the installation box, a plurality of iron grids are arranged in parallel in the sliding frame, the electromagnet is installed in the sliding frame, and the magnetic poles of the electromagnet are fixedly connected to the plurality of iron grids. The sliding frame is slidably connected to the installation box, which is more convenient for disassembly and removal, and the operation is more convenient. The falling dust can only pass through between the iron grids, and the gaps between the iron grids are small, which has a strong adsorption capacity.

[0010] Furthermore, an S-shaped flow channel is formed between the iron bars. The S-shaped flow channel can slow down the speed of falling dust and make the falling dust touch the outer surface of the iron bars, which is more conducive to the iron bars to absorb the iron powder particles in the falling dust and can effectively improve the recovery rate of the iron powder particles.

[0011] Furthermore, the first screening mechanism includes a screen, which is laterally movable and arranged in the installation box. The screen is tilted, and the highest point of the screen is closest to the discharge port of the crushing mechanism. The driving mechanism drives the screen to move back and forth laterally, and the tilt direction of the screen is perpendicular to the moving direction of the screen. The highest point of the screen is closest to the discharge port of the crushing mechanism, which can avoid the dust caused by the large drop of the drop to the greatest extent. The tilted screen can play a guiding role and can guide the larger agglomerated dust screened out for output.

[0012] Furthermore, the screen is inclined to be provided with slide bars at both ends, the installation box is provided with slide holes corresponding to the slide bars, and the slide bars are slidably connected with the corresponding slide holes. The lateral movement is achieved by sliding, the friction between the slide bars and the slide holes is small, the use is smooth, and the service life is long.

[0013] Furthermore, the first screening mechanism also includes a collecting trough, which is fixed on the outside of the installation box, and the installation box is provided with a discharge port, through which the collecting trough is connected to the inside of the installation box, and the inner bottom surface of the collecting trough and the top surface of the screen are in the same horizontal plane. The collecting trough is used to collect the aggregated dust, and its inner bottom surface is flush with the top surface of the screen to prevent dust from gathering at the connection between the collecting trough and the screen.

[0014] Furthermore, the structure of the second screening mechanism is the same as that of the first screening mechanism, the screen of the first screening mechanism is parallel to the screen of the second screening mechanism, and the mesh number of the screen of the first screening mechanism is smaller than the mesh number of the screen of the second screening mechanism. The second screening mechanism is used to filter out some iron powder particles that are not adsorbed by the magnetic attraction mechanism. It has the same structure as the first screening mechanism, which is more convenient for subsequent maintenance and repair.

[0015] Furthermore, the driving mechanism includes a driving structure and a rebound structure respectively arranged on two opposite sides of the installation box, the driving structure is used to drive the screen of the first screening mechanism and the screen of the second screening mechanism to move toward the side of the rebound structure, and the rebound structure is used to drive the screen of the first screening mechanism and the screen of the second screening mechanism to move toward the side of the driving structure. The rapid reciprocating movement of the screen can be achieved through the driving structure and the rebound structure, which can effectively speed up the screening speed.

[0016] Furthermore, the driving structure includes a second motor, an eccentric block, a buffer block and a strike rod. The second motor is fixed on the mounting box, the output shaft of the second motor is fixedly connected with an eccentric block, and the eccentric block is provided with a buffer block; the strike rod is respectively fixedly connected with the slide bar of the first screening mechanism and the slide bar of the second screening mechanism, and the eccentric block and the strike rod are in rolling cooperation. The second motor drives the eccentric block to rotate, the rotation of the eccentric block drives the strike rod to move, and the strike rod drives the screen to move through the slide rod, so that the screen can screen the dust. The buffer block mainly plays a buffering role to prevent the eccentric block from having a violent collision with the strike rod after it rotates to the protruding position.

[0017] Furthermore, the rebound structure is respectively arranged at the sliding rod end of the first screening mechanism away from the driving structure and the sliding rod end of the second screening mechanism away from the driving structure; the rebound structure includes a stop plate, a spring, a fixed plate and a limit plate, the fixed plate is fixedly connected to the installation box, a socket is provided on the fixed plate, the sliding rod end away from the driving structure is plugged into the socket on the fixed plate, a stop plate and a limit plate are fixed on the sliding rod away from the driving structure, and the spring is sleeved on the sliding rod between the stop plate and the fixed plate. When the driving structure drives the screen of the first screening mechanism and the screen of the second screening mechanism to move toward the rebound structure, the spring is compressed, and when the eccentric block of the driving structure rotates to a protruding position passing through it, the spring rebounds the screen of the first screening mechanism and the screen of the second screening mechanism to one side of the driving structure, the limit plate is used to limit the sliding rod to prevent the sliding rod from sliding out of the socket, the stop plate is used to stop the spring, and the spring provides a rebound force to drive the screen to move.

[0018] Compared with the prior art, the beneficial effects of the utility model are as follows: the present scheme is a dry centralized recovery and treatment of dust after collection and cooling, which does not require a water system and a cooling device, and can effectively reduce costs; the present scheme adopts a "screening-adsorption-screening" structure, and larger dust clumps can be screened out through the first screening mechanism, which can prevent larger dust clumps from affecting the magnetic suction mechanism so that the magnetic suction mechanism has better adsorption force, and can effectively improve the recovery rate of iron powder particles; some iron powder particles that are not adsorbed by the magnetic suction mechanism are filtered out through the second screening mechanism to further improve the recovery rate of iron powder particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 It is a structural schematic diagram of the pulverizing mechanism of the utility model.

[0021] Figure 3 It is a structural schematic diagram of the driving mechanism of the utility model.

[0022] Figure 4 It is a half-section view of the installation box of the utility model.

[0023] Figure 5 It is a structural schematic diagram of the driving structure of the utility model.

[0024] Figure 6 It is a structural schematic diagram of the rebound structure of the utility model.

[0025] Figure 7 It is a structural schematic diagram of the magnetic attraction mechanism of the utility model.

[0026] Figure 8 It is a structural schematic diagram of the flow channel in the utility model.

[0027] In the figure: 1. installation box, 2. crushing mechanism, 3. first screening mechanism, 4. magnetic attraction mechanism, 5. second screening mechanism, 6. driving mechanism, 7. outer shell, 8. spiral impeller, 9. motor 1, 10. screen, 11. slide bar, 12. slide hole, 13. collecting trough, 14. discharge port, 15. driving structure, 16. rebound structure, 17. motor 2, 18. eccentric block, 19. buffer block, 20. impact rod, 21. stop plate, 22. spring, 23. fixed plate, 24. limit plate, 25. jack, 26. sliding frame, 27. electromagnet, 28. iron grid, 29. flow channel, 30. collecting box. DETAILED DESCRIPTION

[0028] The drawings of the present invention are only used for illustrative purposes and cannot be construed as limiting the present invention. In order to better illustrate the following embodiments, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0029] like Figure 1 and 3 As shown, the present solution discloses a converter dust screening and recovery device, comprising an installation box 1, a crushing mechanism 2, a first screening mechanism 3, a magnetic attraction mechanism 4, a second screening mechanism 5 and a driving mechanism 6.

[0030] The crushing mechanism 2 is arranged on the top of the installation box 1, and is used for crushing dust; the first screening mechanism 3, the magnetic attraction mechanism 4, and the second screening mechanism 5 are arranged in the installation box 1 from top to bottom, and the first screening mechanism 3 is used for screening out the agglomerated dust. The driving mechanism 6 is installed on the installation box 1, and is used to drive the first screening mechanism 3 and the second screening mechanism 5 to work.

[0031] like Figure 2As shown, the crushing mechanism 2 includes an outer shell 7, a spiral impeller 8 and a motor 9. The outer shell 7 is provided with a feed port and a discharge port 14. The discharge port 14 is connected to the top of the installation box 1. The spiral impeller 8 is rotatably installed in the outer shell 7. The motor 9 is installed on the installation box 1 to drive the spiral impeller 8 to rotate.

[0032] like Figure 3 As shown, the first screening mechanism 3 includes a screen 10, which is arranged in the installation box 1 so as to be laterally movable. The screen 10 is arranged tilted, and the highest point of the screen 10 is closest to the discharge port 14 on the outer shell 7. The driving mechanism 6 drives the screen 10 to move back and forth laterally. The tilting direction of the screen 10 is perpendicular to the moving direction of the screen 10; sliding rods 11 are respectively arranged at both ends of the screen 10, and sliding holes 12 corresponding to the sliding rods 11 are arranged on the installation box 1, and the sliding rods 11 are slidably connected to the corresponding sliding holes 12; specifically, multiple groups of sliding holes 12 are arranged relatively on both sides of the inside of the installation box 1, and one sliding rod 11 corresponds to a group of sliding holes 12, and is slidably connected to the corresponding group of sliding holes 12, such as Figure 4 As shown, the first screening mechanism 3 also includes a collecting trough 13, which is fixed on the outside of the installation box 1. A discharge port 14 is provided on the installation box 1. The collecting trough 13 is connected to the inside of the installation box 1 through the discharge port 14. The bottom surface of the collecting trough 13 and the top surface of the screen 10 are in the same horizontal plane.

[0033] The structure of the second screening mechanism 5 is the same as that of the first screening mechanism 3 , the screen 10 of the first screening mechanism 3 is parallel to the screen 10 of the second screening mechanism 5 , and the mesh number of the screen 10 of the first screening mechanism 3 is smaller than the mesh number of the screen 10 of the second screening mechanism 5 .

[0034] like Figure 3 As shown, the driving mechanism 6 includes a driving structure 15 and a rebound structure 16 respectively arranged on two opposite sides of the installation box 1 in the horizontal direction. The driving structure 15 is used to drive the screen 10 of the first screening mechanism 3 and the screen 10 of the second screening mechanism 5 to move toward the side of the rebound structure 16, and the rebound structure 16 is used to drive the screen 10 of the first screening mechanism 3 and the screen 10 of the second screening mechanism 5 to move toward the side of the driving structure 15.

[0035] like Figure 5 As shown, the driving structure 15 includes a motor 17, an eccentric block 18, a buffer block 19 and a strike rod 20. The motor 17 is fixedly mounted on the mounting box 1. The eccentric block 18 is fixedly connected to the output shaft of the motor 17. The buffer block 19 is arranged on the eccentric block 18. The strike rod 20 is fixedly connected to the sliding rod 11 of the first screening mechanism 3 and the sliding rod 11 of the second screening mechanism 5 respectively. The eccentric block 18 and the strike rod 20 are in rolling cooperation.

[0036] like Figure 3 and 6As shown, the rebound structure 16 is respectively arranged at the end of the slide rod 11 of the first screening mechanism 3 away from the driving mechanism 6 and the end of the slide rod 11 of the second screening mechanism 5 away from the driving mechanism 6; the rebound structure 16 includes a stop plate 21, a spring 22, a fixed plate 23 and a limit plate 24, the fixed plate 23 is fixedly connected to the installation box 1, the fixed plate 23 is provided with a socket 25, the slide rod 11 away from the driving mechanism 6 is plugged into the socket 25 on the fixed plate 23, the limit plate 24 is fixed to the end of the slide rod 11 away from the driving mechanism 6, a stop plate 21 is fixed on the slide rod 11 outside the installation box 1, the spring 22 is sleeved on the slide rod 11 between the stop plate 21 and the fixed plate 23, and the distance from the stop plate 21 to the installation box 1 is smaller than the distance from the fixed plate 23 to the installation box 1.

[0037] like Figure 4 and 7 As shown, the magnetic attraction mechanism 4 includes a sliding frame 26, an electromagnet 27 and an iron grid 28. The sliding frame 26 is slidably connected in the installation box 1. A plurality of iron grids 28 are arranged in parallel in the sliding frame 26. The electromagnet 27 is installed in the sliding frame 26. The magnetic poles of the electromagnet 27 are fixedly connected to the plurality of iron grids 28. An S-shaped flow channel 29 (such as Figure 8 As shown), specifically, two rows of electromagnets 27 are respectively arranged on both sides of the sliding frame 26, and an iron grid 28 with uniform intervals is formed between the two rows of electromagnets 27. The magnetic poles of the electromagnets 27 on both sides are respectively connected to the two ends of the iron grid 28, so as to provide a strong magnetic attraction; the top port of the flow channel 29 is set to an inverted cone funnel shape, which is more convenient for falling dust to enter and prevents some dust from accumulating on the top of the iron grid 28.

[0038] like Figure 4 As shown, it also includes a collection box 30, which is arranged at the bottom of the installation box 1. The bottom of the installation box 1 is also provided with an outlet for extracting the collection box 30.

[0039] Working process:

[0040] The collected converter smoke is first added to the pulverizing mechanism 2 for pulverization, and then enters the installation box 1. The gathered agglomerated dust is first screened out through the first screening mechanism 3 to prevent larger agglomerated dust from affecting the adsorption of iron powder particles by the magnetic suction mechanism 4. The screened dust falls through the magnetic suction mechanism 4 and passes through the S-shaped flow channel 29 between the grid plates, during which it contacts the inner wall of the flow channel 29. The flow channel 29 can adsorb the iron powder particles in the dust thereon to achieve the recovery of the iron powder in the smoke. When the iron powder is adsorbed more on the magnetic suction mechanism 4, it can be slid out of the installation box 1 for cleaning. After that, the screened dust continues to fall, passes through the second screening mechanism 5 and falls into the collection box 30 below. The second screening mechanism 5 is used to filter out some iron powder particles that are not adsorbed by the magnetic suction mechanism 4 to further improve the recovery rate of the iron powder particles. After that, it continues to fall into the collection box 30. The collection box 30 is used to collect dust for centralized treatment.

[0041] Obviously, the above embodiments of the utility model are only examples for clearly explaining the technical solution of the utility model, and are not intended to limit the specific implementation methods of the utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the claims of the utility model shall be included in the protection scope of the claims of the utility model.

Claims

1. A converter dust screening and recovery device, characterized in that: It comprises an installation box (1), a crushing mechanism (2), a first screening mechanism (3), a magnetic attraction mechanism (4), a second screening mechanism (5) and a driving mechanism (6); The crushing mechanism (2) is arranged on the top of the installation box (1) and is used to crush dust; the first screening mechanism (3), the magnetic attraction mechanism (4), and the second screening mechanism (5) are arranged in sequence from top to bottom in the installation box (1), the first screening mechanism (3) is used to screen out agglomerated dust, and the driving mechanism (6) is installed on the installation box (1) and is used to drive the first screening mechanism (3) and the second screening mechanism (5) to work.

2. The converter dust screening and recovery device according to claim 1, characterized in that: The magnetic attraction mechanism (4) comprises a sliding frame (26), an electromagnet (27) and an iron grid (28); the sliding frame (26) is slidably connected to the installation box (1); a plurality of iron grids (28) are arranged in parallel in the sliding frame (26); the electromagnet (27) is installed in the sliding frame (26); and the magnetic poles of the electromagnet (27) are fixedly connected to the plurality of iron grids (28).

3. The converter dust screening and recovery device according to claim 2, characterized in that: An S-shaped flow channel (29) is formed between the plurality of iron grids (28).

4. The converter dust screening and recovery device according to claim 1, characterized in that: The first screening mechanism (3) comprises a screen (10), the screen (10) being arranged in a transversely movable manner in the installation box (1), the screen (10) being arranged at an inclination, the highest point of the screen (10) being closest to the discharge port (14) of the pulverizing mechanism (2), the driving mechanism (6) driving the screen (10) to move transversely back and forth, and the inclination direction of the screen (10) being perpendicular to the moving direction of the screen (10).

5. The converter dust screening and recovery device according to claim 4, characterized in that: The screen (10) is provided with sliding rods (11) at both ends thereof, and the installation box (1) is provided with sliding holes (12) corresponding to the sliding rods (11), and the sliding rods (11) are slidably connected to the corresponding sliding holes (12).

6. The converter dust screening and recovery device according to claim 4, characterized in that: The first screening mechanism (3) further comprises a collecting trough (13), the collecting trough (13) being fixed on the outside of the installation box (1), the installation box (1) being provided with a discharge port (14), the collecting trough (13) being connected to the interior of the installation box (1) via the discharge port (14), and the inner bottom surface of the collecting trough (13) and the top surface of the screen (10) being in the same horizontal plane.

7. The converter dust screening and recovery device according to claim 6, characterized in that: The structure of the second screening mechanism (5) is the same as that of the first screening mechanism (3); the screen (10) of the first screening mechanism (3) is parallel to the screen (10) of the second screening mechanism (5); and the mesh number of the screen (10) of the first screening mechanism (3) is smaller than the mesh number of the screen (10) of the second screening mechanism (5).

8. The converter dust screening and recovery device according to claim 7, characterized in that: The driving mechanism (6) comprises a driving structure (15) and a rebound structure (16) respectively arranged on two opposite sides of the installation box (1) in the transverse direction; the driving structure (15) is used to drive the screen (10) of the first screening mechanism (3) and the screen (10) of the second screening mechanism (5) to move toward the side of the rebound structure (16); and the rebound structure (16) is used to drive the screen (10) of the first screening mechanism (3) and the screen (10) of the second screening mechanism (5) to move toward the side of the driving structure (15).

9. The converter dust screening and recovery device according to claim 8, characterized in that: The driving structure (15) comprises a second motor (17), an eccentric block (18), a buffer block (19) and a striking rod (20); the second motor (17) is fixed on the mounting box (1); an eccentric block (18) is fixedly connected to the output shaft of the second motor (17); a buffer block (19) is arranged on the eccentric block (18); the striking rod (20) is respectively fixedly connected to the sliding rod (11) of the first screening mechanism (3) and the sliding rod (11) of the second screening mechanism (5); the eccentric block (18) and the striking rod (20) are in rolling cooperation.

10. The converter dust screening and recovery device according to claim 9, characterized in that: The rebound structure (16) is respectively arranged at the end of the slide rod (11) of the first screening mechanism (3) away from the driving structure (15) and the end of the slide rod (11) of the second screening mechanism (5) away from the driving structure (15); the rebound structure (16) comprises a stop plate (21), a spring (22), a fixed plate (23) and a limit plate (24); the fixed plate (23) is fixedly connected to the installation box (1); a plug hole (25) is provided on the fixed plate (23); the slide rod (11) away from the driving structure (15) is plugged into the plug hole (25) on the fixed plate (23); the slide rod (11) away from the driving structure (15) is fixed with a stop plate (21) and a limit plate (24) is fixed at the end; the spring (22) is sleeved on the slide rod (11) between the stop plate (21) and the fixed plate (23).

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