A device for removing iron from aluminum oxide powder

Abstract

The utility model relates to the technical field of aluminium oxide powder removes iron, in particular to a kind of iron removal device for aluminium oxide powder;It can further improve the dispersion degree of aluminium oxide powder, prolong the contact duration between iron powder and magnetic attraction piece, improve iron powder removal effect;Including rack, magnetic attraction piece and fixed installation on the hydrocyclone of rack, the hydrocyclone includes cylinder, air inlet pipe into the cylinder along the tangential direction of cylinder, hollow flow guide pipe from the top center of cylinder and be set at the conical discharge cylinder of cylinder bottom, hollow interlayer is equipped in the hollow flow guide pipe, the magnetic attraction piece is evenly distributed in hollow interlayer;The outer wall of hollow flow guide pipe is equipped with the first annular scraper that can slide up and down, the inner wall of hollow flow guide pipe is equipped with the second annular scraper that can slide up and down, further include the lifting drive part for driving the first annular scraper and the second annular scraper slide up and down.

Description

Technical Field

[0001] This utility model relates to the technical field of iron removal from alumina powder, and in particular to an iron removal device for alumina powder. Background Technology

[0002] During the production of alumina powder, some iron powder may be mixed in. In order to improve the purity of alumina powder, magnetic iron removal equipment is often used to remove the iron powder from the alumina powder.

[0003] For example, the utility model patent application with publication number CN211538190U discloses an iron removal device for zirconia powder, including a box, a vibrating spreading device, and an iron removal device. The bottom of the box is provided with a discharge hopper, and the inside of the box is provided with detachable iron removal devices distributed vertically. The iron removal device includes a magnet frame, which is a frame structure with equally spaced magnet rods on one side of the mounting plate. It can effectively remove iron impurities from zirconia powder and has high iron removal efficiency. The detachable iron removal device makes it easy to clean the iron impurities adsorbed on the plastic shell.

[0004] However, the following defects were found: the contact time between the magnetic rod and the alumina powder was short, and the adsorption and removal effect of iron powder needs to be further improved. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides an iron removal device for alumina powder that further improves the dispersion of alumina powder, prolongs the contact time between iron powder and the magnetic suction element, and enhances the iron powder removal effect.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an iron removal device for alumina powder, comprising a frame, magnetic suction components, and a hydrocyclone fixedly installed on the frame. The hydrocyclone includes a cylinder, an air inlet pipe tangentially entering the cylinder, a hollow guide pipe extending from the center of the top of the cylinder into the upper middle part of the cylinder, and a conical discharge cylinder disposed at the bottom of the cylinder. The hollow guide pipe has a hollow interlayer, and the magnetic suction components are circumferentially distributed within the hollow interlayer.

[0007] Furthermore, the force exerted by the air pressure inside the cylinder on the powder should be greater than the weight of the powder and the resistance it experiences. The magnetic attraction force of the magnetic component on the iron powder particles is much greater than the forces exerted by the air pressure and gravity on the iron powder particles. The magnetic component can be a samarium cobalt magnet, neodymium iron boron magnet (strong magnet), ferrite magnet, AlNiCo magnet, iron-chromium-cobalt magnet, etc. The powder discharged through the bottom of the conical discharge cylinder during the operation (this part of the powder mainly consists of alumina particles and contains a small amount of iron powder particles) can be collected or subjected to secondary iron removal treatment.

[0008] Preferably, the outer wall of the hollow guide tube is provided with a first annular scraper that can slide up and down, and the inner wall of the hollow guide tube is provided with a second annular scraper that can slide up and down. It also includes a lifting drive for driving the first and second annular scrapers to slide up and down. Further, the lifting drive can be a telescopic cylinder, or other equivalent components that drive the first and second annular scrapers to slide up and down. The inner wall of the first annular scraper fits into the outer wall of the hollow guide tube, and the outer wall of the second annular scraper fits into the inner wall of the hollow guide tube.

[0009] Preferably, the lifting drive component includes multiple first tension springs, multiple second tension springs, a first pull rope, and a second pull rope. The top of the cylinder is provided with multiple mounting cylinders corresponding to the first and second annular scrapers. The multiple first tension springs and multiple second tension springs are all located inside the corresponding mounting cylinders. One end of the multiple first tension springs is fixedly connected to the first annular scraper, and the other end of the multiple first tension springs is fixedly connected to the inner wall of the corresponding mounting cylinder. One end of the multiple second tension springs is connected to the second annular scraper, and the other end of the multiple second tension springs is connected to the inner wall of the corresponding mounting cylinder. One end of the first pull rope is connected to the bottom of the first annular scraper, and the other end of the first pull rope extends from the bottom port of the conical discharge cylinder. One end of the second pull rope is connected to the bottom of the second annular scraper, and the other end of the second pull rope extends from the bottom port of the conical discharge cylinder.

[0010] Furthermore, a guide tube fixedly connected to the first and second annular scrapers can be installed inside the mounting cylinder. The guide tube is slidably installed inside the mounting cylinder to ensure that the first and second annular scrapers move up and down in the vertical direction. There are at least two sets of the first and second pull ropes. The two sets of first pull ropes are evenly distributed around the circumference of the first annular scraper, and the two sets of second pull ropes are evenly distributed around the circumference of the second annular scraper. The first and second pull ropes are staggered.

[0011] Preferably, it also includes a lifting flange, and the frame is provided with a placement plate. The lifting flange is sleeved on the outer wall of the conical discharge cylinder. The bottom ends of the first pull rope and the second pull rope pass through the placement plate and are fixedly connected to the bottom of the lifting flange. Furthermore, the placement plate is provided with a through hole that allows the first pull rope and the second pull rope to pass through, and the lifting flange is provided with a lifting handle so that the operator can lift the lifting flange upward.

[0012] Preferably, the magnetic attractor is an arc-shaped plate, and multiple magnetic attractors are arranged to form a cylindrical shape. The magnetic attractor is an electromagnet.

[0013] Preferably, there is a gap of at least 20cm between the bottom of the magnetic suction component and the bottom of the hollow guide tube.

[0014] Preferably, it also includes a suction fan, the output end of which is connected to the input end of the air inlet pipe, and a feeding hopper is installed at the input end of the suction fan; furthermore, the motor on the suction fan is a speed-regulating motor to adjust the speed of the suction fan, thereby adjusting the air pressure inside the cylinder.

[0015] Preferably, it also includes a dust collector for capturing alumina powder, wherein the output end of the hollow guide tube is connected to the input end of the dust collector; further, the dust collector is preferably a bag filter dust collector, but other equivalent dust collection equipment with dust capture effect can also be used; an open receiving box is provided at the bottom of the conical discharge cylinder and at the bottom discharge port of the dust collector.

[0016] Compared with the prior art, this utility model provides an iron removal device for alumina powder, which has the following beneficial effects: In this iron removal device for alumina powder, the powder is pressurized by air and enters the cylinder tangentially along the inner wall of the cylinder through the air inlet pipe. The powder undergoes swirling motion in the cylinder. Under the action of swirling, the powder gathers towards the middle of the cylinder and moves downward in a swirling state along the outer wall of the hollow guide tube. Under the attraction of the magnetic attraction element, the iron powder particles in the powder are adsorbed to the outer wall of the hollow guide tube, while most of the alumina particles in the powder enter the hollow guide tube. The remaining iron powder is adsorbed to the inner wall of the hollow guide tube under the action of the magnetic attraction element. The powder is further dispersed by air pressure and the iron powder particles are adsorbed by the inner and outer walls of the hollow guide tube, which prolongs the contact time between the iron powder and the magnetic attraction element and improves the iron powder removal effect. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a top view schematic diagram of the structure of this utility model.

[0019] Figure 3 This is the utility model Figure 2 Schematic diagram of the cross-sectional structure at point AA.

[0020] Figure 4 This is the utility model Figure 2 Schematic diagram of the cross-sectional structure at point BB.

[0021] Figure 5 This is the utility model Figure 4 Schematic diagram of the cross-sectional structure at point CC.

[0022] Figure 6 This is the utility model Figure 4 A magnified schematic diagram of the structure at point D in the middle.

[0023] The following components are labeled in the attached diagram: 1. Frame; 2. Magnetic suction component; 3. Cylinder; 4. Air inlet pipe; 5. Hollow guide pipe; 6. Conical discharge cylinder; 7. First annular scraper; 8. Second annular scraper; 9. First tension spring; 10. Second tension spring; 11. First pull rope; 12. Second pull rope; 13. Mounting cylinder; 14. Lifting flange; 15. Placement plate; 16. Suction fan; 17. Feed hopper; 18. Dust collector. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0025] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] Example 1 Please refer to Figure 1-4 A device for removing iron from alumina powder includes a frame 1, magnetic suction components 2, and a hydrocyclone fixedly mounted on the frame 1. The hydrocyclone includes a cylinder 3, an air inlet pipe 4 tangentially entering the cylinder 3, a hollow guide pipe 5 extending from the top center of the cylinder 3 into the upper middle part of the cylinder 3, and a conical discharge cylinder 6 disposed at the bottom of the cylinder 3. The hollow guide pipe 5 has a hollow interlayer, and the magnetic suction components 2 are evenly distributed circumferentially within the hollow interlayer. Furthermore, the air pressure inside the cylinder 3... The force exerted on the powder should be greater than the powder's weight and the resistance it experiences. The magnetic suction force of the magnetic component 2 on the iron powder particles is much greater than the force exerted on the iron powder particles by wind pressure and gravity. The magnetic component 2 can be made of samarium cobalt magnets, neodymium iron boron magnets, ferrite magnets, AlNiCo magnets, iron-chromium-cobalt magnets, etc. The powder discharged through the bottom of the conical discharge cylinder 6 during the operation (this part of the powder mainly consists of alumina particles and contains a small amount of iron powder particles) can be collected or subjected to secondary iron removal treatment.

[0028] Specifically, it also includes a suction fan 16, the output end of which is connected to the input end of the air inlet pipe 4, and a feeding hopper 17 is installed at the input end of the suction fan 16; furthermore, the motor on the suction fan 16 is a speed-regulating motor, so as to adjust the speed of the suction fan 16, thereby adjusting the air pressure inside the cylinder 3.

[0029] Specifically, it also includes a dust collector 18 for capturing alumina powder, with the output end of the hollow guide pipe 5 connected to the input end of the dust collector 18; furthermore, the dust collector 18 is preferably a bag dust collector 18, but other equivalent dust collection equipment with dust capture effect can also be used; an open receiving box is provided at the bottom of the conical discharge cylinder 6 and at the bottom discharge port of the dust collector 18.

[0030] The powder can be dispersed into the feeding hopper 17. By starting the suction fan 16, the suction fan 16 pressurizes the powder in the feeding hopper 17 and sends it into the hydrocyclone, realizing automatic feeding of the powder. The dust collector 18 can capture the iron-removed alumina powder and collect the alumina powder through the discharge port at the bottom of the dust collector 18 to obtain pure alumina powder after iron removal.

[0031] For details, please refer to Figure 3-4 as well as Figure 6 The hollow guide tube 5 has a first annular scraper 7 that can slide up and down on its outer wall, and a second annular scraper 8 that can slide up and down on its inner wall. It also includes a lifting drive for driving the first annular scraper 7 and the second annular scraper 8 to slide up and down. Further, the lifting drive can be a telescopic cylinder or other equivalent components that can drive the first annular scraper 7 and the second annular scraper 8 to slide up and down. The inner wall of the first annular scraper 7 fits with the outer wall of the hollow guide tube 5, and the outer wall of the second annular scraper 8 fits with the inner wall of the hollow guide tube 5.

[0032] For details, please refer to Figure 5 The magnetic attractor 2 is an arc-shaped plate, and multiple magnetic attractors 2 are arranged to form a cylindrical shape. The magnetic attractor 2 is an electromagnet.

[0033] For details, please refer to Figures 3-4 There is a gap of at least 20cm between the bottom of the magnetic suction component 2 and the bottom of the hollow guide tube 5.

[0034] For details, please refer to Figures 4-6The lifting drive component includes multiple first tension springs 9, multiple second tension springs 10, a first pull rope 11, and a second pull rope 12. The top of the cylinder 3 is provided with multiple mounting cylinders 13 corresponding to the first annular scraper 7 and the second annular scraper 8. The multiple first tension springs 9 and multiple second tension springs 10 are all located within their respective mounting cylinders 13. One end of each first tension spring 9 is fixedly connected to the first annular scraper 7, and the other end is fixedly connected to the inner wall of the corresponding mounting cylinder 13. One end of each second tension spring 10 is connected to the second annular scraper 8, and the other end is connected to the inner wall of the corresponding mounting cylinder 13. One end of each first pull rope 11 is connected to the bottom of the first annular scraper 7. The other end extends from the bottom port of the conical discharge cylinder 6. One end of the second pull rope 12 is connected to the bottom of the second annular scraper 8, and the other end of the second pull rope 12 extends from the bottom port of the conical discharge cylinder 6. Furthermore, a guide tube fixedly connected to the first annular scraper 7 and the second annular scraper 8 can be installed in the mounting cylinder 13. The guide tube can be slidably installed in the mounting cylinder 13 to ensure that the first annular scraper 7 and the second annular scraper 8 move up and down in the vertical direction. There are at least two sets of the first pull rope 11 and the second pull rope 12. The two sets of first pull rope 11 are evenly distributed around the first annular scraper 7, and the two sets of second pull rope 12 are evenly distributed around the second annular scraper 8. The first pull rope 11 and the second pull rope 12 are staggered.

[0035] For details, please refer to Figure 1 and Figures 3-4 It also includes a lifting flange 14, a placement plate 15 on the frame 1, the lifting flange 14 is fitted onto the outer wall of the conical discharge cylinder 6, and the bottom ends of the first pull rope 11 and the second pull rope 12 pass through the placement plate 15 and are fixedly connected to the bottom of the lifting flange 14; furthermore, the placement plate 15 is provided with a through hole that allows the first pull rope 11 and the second pull rope 12 to pass through, and the lifting flange 14 is provided with a lifting handle so that the operator can lift the lifting flange 14 upward.

[0036] After a certain amount of alumina powder has been processed or the processing is complete, the suction fan 16 stops running. The lifting drive drives the first annular scraper 7 and the second annular scraper 8 to move down along the outer and inner walls of the hollow guide tube 5. The first annular scraper 7 and the second annular scraper 8 scrape off the iron powder particles adsorbed on the outer and inner walls of the hollow guide tube 5. The scraped iron powder particles are discharged from the bottom of the conical discharge cylinder 6. The operator collects these iron powder particles through other collectors to avoid mixing with the powder after iron removal. The magnetic suction component 2 is an arc-shaped plate to fit the outer wall of the hollow guide tube 5, which can increase the adsorption area of ​​iron powder particles at the hollow guide tube 5.

[0037] When unloading iron powder, the electromagnet is de-energized, and the magnetic force at the magnetic suction component 2 disappears, allowing the iron powder to be scraped off from the inner and outer walls of the hollow guide tube 5. When the magnetic suction component 2 is a permanent magnet, the distance between the bottom of the magnetic suction component 2 and the bottom of the hollow guide tube 5 can be adjusted as the first annular scraper 7 and the second annular scraper 8 move downwards, causing the iron powder particles to move away from the magnetic suction component 2, thus allowing the iron powder particles to be scraped off smoothly. It should be noted that the hollow guide tube 5, the first annular scraper 7, and the second annular scraper 8 are all made of non-magnetic materials such as plastic. When unloading iron powder, the first annular scraper 7 and the second annular scraper 8 can also be pulled downwards by pulling the lifting flange 14 upwards, which, after being driven by the first pull rope 11 and the second pull rope 12, achieves synchronous drive of the first annular scraper 7 and the second annular scraper 8, making the structure more scientific and reasonable.

[0038] In another embodiment, the lifting flange 14 can be driven upward by an external telescopic cylinder, etc.; when the first pull rope 11 and the second pull rope 12 are released from the force, the first annular scraper 7 and the second annular scraper 8 can be automatically reset under the action of the first tension spring 9 and the second tension spring 10.

[0039] The iron removal device for alumina powder provided by this utility model is used as follows: The powder is dispersed and fed into the upper hopper 17. The suction fan 16 is started, which pressurizes the powder and blows it into the air inlet pipe 4. The powder enters the cylinder 3 tangentially along the inner wall of the cylinder 3 through the air inlet pipe 4. The powder undergoes a swirling motion inside the cylinder 3. Under the action of the swirling motion, the powder gathers towards the middle of the cylinder 3 and moves downward in a swirling state along the outer wall of the hollow guide pipe 5. Under the attraction of the magnetic suction element 2, the powder is further attracted to the cylinder. In this process, iron powder particles in the powder are adsorbed to the outer wall of the hollow guide tube 5, while most alumina particles in the powder enter the hollow guide tube 5. The remaining iron powder is adsorbed to the inner wall of the hollow guide tube 5 by the magnetic suction element 2. Some alumina powder is collected and utilized through the bottom of the conical discharge cylinder 6, or the above steps are repeated for secondary iron removal. The alumina captured in the dust collector 18 is discharged from the dust collector 18 and then collected and utilized.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. An iron removal device for alumina powder, characterized in that, The device includes a frame (1), a magnetic suction component (2), and a hydrocyclone fixedly installed on the frame (1). The hydrocyclone includes a cylinder (3), an air inlet pipe (4) that enters the cylinder (3) tangentially, a hollow guide pipe (5) that extends from the top center of the cylinder (3) into the upper middle part of the cylinder (3), and a conical discharge cylinder (6) set at the bottom of the cylinder (3). The hollow guide pipe (5) is provided with a hollow interlayer, and the magnetic suction component (2) is evenly distributed in the hollow interlayer.

2. The iron removal device for alumina powder according to claim 1, characterized in that, The hollow guide tube (5) has a first annular scraper (7) that can slide up and down on its outer wall, and a second annular scraper (8) that can slide up and down on its inner wall. It also includes a lifting drive for driving the first annular scraper (7) and the second annular scraper (8) to slide up and down.

3. The iron removal device for alumina powder according to claim 2, characterized in that, The lifting drive component includes multiple first tension springs (9), multiple second tension springs (10), a first pull rope (11), and a second pull rope (12). The top of the cylinder (3) is provided with multiple mounting cylinders (13) corresponding to the first annular scraper (7) and the second annular scraper (8). The multiple first tension springs (9) and the multiple second tension springs (10) are all located in the corresponding mounting cylinders (13). One end of the multiple first tension springs (9) is fixedly connected to the first annular scraper (7), and the other end of the multiple first tension springs (9) is connected to the corresponding mounting cylinder (13). The wall is fixedly connected, one end of multiple second tension springs (10) is connected to the second annular scraper (8), and the other end of multiple second tension springs (10) is connected to the inner wall of the corresponding mounting cylinder (13). One end of the first pull rope (11) is connected to the bottom of the first annular scraper (7), and the other end of the first pull rope (11) extends from the bottom port of the conical discharge cylinder (6). One end of the second pull rope (12) is connected to the bottom of the second annular scraper (8), and the other end of the second pull rope (12) extends from the bottom port of the conical discharge cylinder (6).

4. The iron removal device for alumina powder according to claim 3, characterized in that, It also includes a lifting flange (14), and a placement plate (15) is provided on the frame (1). The lifting flange (14) is sleeved on the outer wall of the conical discharge cylinder (6). The bottom ends of the first pull rope (11) and the second pull rope (12) pass through the placement plate (15) and are fixedly connected to the bottom of the lifting flange (14).

5. The iron removal device for alumina powder according to claim 1 or 4, characterized in that, The magnetic attractor (2) is an arc-shaped plate, and multiple magnetic attractors (2) are arranged to form a cylindrical body. The magnetic attractor (2) is an electromagnet.

6. The iron removal device for aluminum oxide powder according to claim 1 or 4, characterized by There is a gap of at least 20cm between the bottom of the magnetic suction component (2) and the bottom of the hollow guide tube (5).

7. The iron removal device for aluminum oxide powder according to claim 1, characterized by It also includes a suction fan (16), the output end of which is connected to the input end of the air inlet pipe (4), and a feeding hopper (17) is installed at the input end of the suction fan (16).

8. The iron removal device for alumina powder according to claim 7, characterized in that, It also includes a dust collector (18) for capturing alumina powder, wherein the output end of the hollow guide tube (5) is connected to the input end of the dust collector (18).

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