Efficient grading device for rare earth polishing powder

Abstract

The invention provides a rare earth polishing powder efficient grading device which comprises a box body, a screening mechanism, an iron removal mechanism, a guide mechanism, an airflow crushing mechanism and a separator, and the screening mechanism is used for screening rare earth polishing powder fed into a screen frame; the iron removal mechanism comprises a plurality of electromagnetic iron rods which are arranged at intervals, and the electromagnetic iron rods are used for adsorbing iron-containing impurities in the rare earth polishing powder; the guide mechanism comprises guide frames which are arranged at intervals, the guide frames are arranged over the electromagnetic iron rods, and the guide frames are used for receiving the rare earth polishing powder discharged by the net frame and guiding the rare earth polishing powder to fall onto the electromagnetic iron rods; the airflow crushing mechanism is used for carrying out airflow crushing on the deironed rare earth polishing powder; and the separator is used for grading the crushed rare earth polishing powder according to the volume size. Rare earth polishing powder discharged after screening can be accurately controlled to smoothly fall onto an electromagnet rod, so that the screened rare earth polishing powder is in full contact with the electromagnet rod, and iron-containing impurities in the rare earth polishing powder are fully removed.

Description

Technical Field

[0001] This invention relates to the field of rare earth polishing powder grading technology, specifically to a high-efficiency rare earth polishing powder grading device. Background Technology

[0002] Rare earth polishing powder is a mixed light rare earth oxide powder with cerium oxide as the main component, used to improve the surface finish of products. Raw materials include bastnaesite concentrate or soluble rare earth salts, produced through chemical treatment, calcination, and pulverization processes. Based on cerium oxide content, it can be divided into three categories: low-cerium, cerium-rich, and high-cerium. In China, it is classified into oxalate, sulfate, and fluorocarbonate systems based on production processes.

[0003] In existing technologies, rare earth polishing powder needs to be screened into different grades of polishing powder particles and powders according to its application to meet diverse needs. Currently, multi-stage screening devices are commonly used, which allow rare earth polishing powder to pass through sieve plates with different pore sizes in sequence. However, this method suffers from low classification efficiency.

[0004] Furthermore, rare earth polishing raw materials often contain metallic impurities such as iron filings during mining and processing. The presence of these impurities not only severely affects the quality of the final product but also causes additional wear and tear on production equipment. However, existing grading devices often struggle to adequately separate and remove these iron-containing impurities from the rare earth polishing powder during the screening process, thus impacting the overall quality of the product. Summary of the Invention

[0005] The purpose of this invention is to improve and innovate upon the shortcomings and problems existing in the prior art, and to provide a high-efficiency classification device for rare earth polishing powder.

[0006] A high-efficiency classification device for rare earth polishing powder includes: Box; A screening mechanism is provided in a box. The screening mechanism includes a screen frame and is used to screen rare earth polishing powder fed into the screen frame. The iron removal mechanism includes a plurality of electromagnets spaced apart, which are used to adsorb iron-containing impurities in rare earth polishing powder. The guiding mechanism includes spaced guide frames positioned directly above the electromagnet rod. The guide frames are used to receive rare earth polishing powder discharged from the mesh frame and guide the rare earth polishing powder to fall onto the electromagnet rod. An airflow pulverizing mechanism is used to spray high-pressure gas to pulverize rare earth polishing powder after iron removal. A separator for classifying pulverized rare earth polishing powder by volume.

[0007] A further embodiment is that the electromagnet rod is mounted on a rotating rod, the two ends of which rotate on the inner wall of the box. A gear is mounted on the outer surface of one end of the rotating rod, and all the electromagnet rods are connected to a rack by the corresponding gears. One end of the rack is connected to the inner wall of the box through a second spring, and the end of the rack away from the second spring abuts against a second cam. The second cam is driven to rotate by a drive mechanism.

[0008] A further embodiment is that one side of the mesh frame abuts against the first cam, which is driven to rotate by a drive mechanism; a support rod is fixedly connected to the outer surface of the mesh frame, the end of the support rod away from the mesh frame is slidably engaged with the first fixed sleeve, and the support rod is connected to the bottom wall of the inner cavity of the first fixed sleeve through a first spring.

[0009] A further embodiment includes a vibration mechanism, which includes a striking head for vibrating the guide mechanism; the vibration mechanism also includes a first movable rod, which is used to drive the striking head closer to or away from the guide mechanism. The first movable rod is slidably fitted onto a first fixed sleeve, and a support rod passes through the middle of the first movable rod. The middle of the support rod is provided with a notch, and one side of the notch is provided as a first inclined surface; the middle of the first movable rod is provided with a second inclined surface for cooperating with the first inclined surface; a third spring is sleeved on the outer surface of the first movable rod for realizing its reset.

[0010] A further embodiment includes a second fixed sleeve on which a second movable rod is slidably fitted. The second movable rod is connected to the bottom wall of the inner cavity of the second fixed sleeve via a fourth spring. A third fixed sleeve is provided on the second movable rod, and a wedge block is slidably fitted on the third fixed sleeve. The wedge block is connected to the bottom wall of the inner cavity of the third fixed sleeve via a fifth spring. A protrusion that mates with the wedge block is provided at the bottom of the first movable rod. A limit block is provided between the second movable rod and the first movable rod, and the bottom end of the limit block is configured as an inclined surface that matches the upper surface of the wedge block.

[0011] A further option is that the cross-section of the guide frame is V-shaped.

[0012] A further embodiment is that the airflow pulverizing mechanism includes air inlet branch pipes spaced apart on the inner walls around the housing, with the two ends of the air inlet branch pipes connected to an air outlet nozzle and an air inlet main pipe, respectively.

[0013] A further embodiment includes a partition plate installed on the inner wall of the housing, which separates the iron removal mechanism from the airflow pulverizing mechanism. The partition plate has several first through slots, each corresponding to a gap between two electromagnet rods. The partition plate also has a movable plate that slides along a limiting slot. The movable plate has several second through slots, one end of which is connected to a first electric telescopic rod. The first electric telescopic rod drives the movable plate to slide relative to the limiting slots, allowing the first and second through slots to overlap or offset from each other.

[0014] A further embodiment is that a first connecting channel is provided in the middle of the partition plate corresponding to the first through groove. The first connecting channel is connected to the separator through a second connecting pipe. A second connecting channel is provided in the middle of the movable plate. The second connecting channel is open at both ends, and one end of the second connecting channel extends to the center near the movable plate. When the first electric telescopic rod drives the movable plate to slide relative to the limiting groove, the first connecting channel and the second connecting channel will be connected to each other or separated.

[0015] A further embodiment is that the screening mechanism also includes a feed pipe, the upper end of which is rotatably connected to the first connecting pipe, the bottom end of which is conical, and a conical block is fixedly connected to the inner wall of the bottom end of the feed pipe. The conical block is located directly above the middle of the mesh frame, and the feed pipe is driven to rotate by a drive mechanism.

[0016] Compared with the prior art, the beneficial effects of the present invention are: (1) The present invention sets a guide frame corresponding to the top of each electromagnet rod, and the guide frames are connected to each other, so that the rare earth polishing powder discharged by the screening mechanism can be accurately controlled to fall smoothly onto the electromagnet rod, so that the screened rare earth polishing powder can fully contact the electromagnet rod, thereby fully removing iron impurities in the rare earth polishing powder. (2) The present invention enables the electromagnet rod to rotate back and forth within a certain angle range through the cooperation of the drive mechanism, rack, gear and second spring, so that the rare earth polishing powder falling on the electromagnet rod can continue to fall smoothly, while the iron filings and other impurities in the rare earth polishing powder will remain on the electromagnet rod. (3) Through the cooperation of the first movable rod, the protrusion, the third spring, the second fixed sleeve, the second movable rod, the fourth spring, the third fixed sleeve, the fifth spring, the wedge block, the limiting block and the striking head, the present invention will simultaneously drive the striking head at the bottom of the second movable rod to move rapidly downward during the reciprocating motion of the mesh frame driven by the driving mechanism, thereby striking the fixed plate, which is beneficial to improving the vibration effect of the striking head, so that the rare earth polishing powder can smoothly slide down along the guide frame; (4) The present invention provides that by opening several first through slots at intervals on the partition, the gap between the first through slots corresponds to the gap between the two electromagnet rods, so that when the electromagnet rods rotate back and forth within a certain angle range, the rare earth polishing powder will fall into the first through slots and thus enter the airflow pulverizing mechanism. (5) The present invention opens a first connecting channel and a second connecting channel on the partition plate and the movable plate respectively, and the first connecting channel is connected to the separator through the second connecting pipe, so that the feed end of the separator can extend to the center of the box, which is close to the equidistant intersection of the air jets on the inner wall. In this way, on the one hand, the rare earth polishing powder can be crushed by the impact of the high-pressure air jets from multiple sets of air nozzles, resulting in a good crushing effect; on the other hand, it is beneficial for the crushed powder to move upward with the air jets and enter the second connecting channel, so that the crushed ultrafine particles can be discharged into the separator through the second connecting channel, the first connecting channel and the second connecting pipe. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural schematic diagram of a high-efficiency classification device for rare earth polishing powder provided in an embodiment of the present invention. Figure 2 This is a cross-sectional three-dimensional structural diagram of a high-efficiency classification device for rare earth polishing powder provided in an embodiment of the present invention. Figure 3 This is a cross-sectional front view of a high-efficiency classification device for rare earth polishing powder provided in an embodiment of the present invention; Figure 4 Provided by the embodiments of the present invention Figure 2 A magnified view of the structure at point A in the middle; Figure 5 This is a cross-sectional structural schematic diagram of the vibration mechanism provided in an embodiment of the present invention; Figure 6 This is a three-dimensional structural diagram of the partition and movable plate provided in an embodiment of the present invention; Figure 7 This is a three-dimensional structural diagram of the movable plate provided in an embodiment of the present invention.

[0019] Reference numerals: 1. Box body; 2. Base plate; 3. Cover plate; 4. Feeding mechanism; 401. First motor; 402. Screw conveyor roller; 403. Conveyor cylinder; 404. Feed port; 5. Screening mechanism; 501. First connecting pipe; 502. Feed pipe; 503. Conical block; 504. Mesh frame; 6. Drive mechanism; 601. First fixed sleeve; 602. First spring; 603. Support rod; 6031. First inclined plane; 604. Second motor; 605. Third motor; 606. First rotating shaft; 607. Second rotating shaft; 608. First cam; 609. Second cam; 610. Drive wheel; 611. Belt; 612. Driven wheel; 7. Guide mechanism; 701. Fixed plate; 702. Guide frame; 8. Iron removal mechanism; 801. Electromagnetic rod; 802. Gear; 803. Rack; 8 04. Second spring; 9. Vibration mechanism; 901. First movable rod; 9011. Protrusion; 9012. Second inclined plane; 902. Third spring; 903. Second fixed sleeve; 904. Second movable rod; 905. Fourth spring; 906. Third fixed sleeve; 907. Fifth spring; 908. Wedge block; 909. Limiting block; 910. Striking head; 10. Airflow pulverizing mechanism; 1001. Partition plate; 1002. Limiting groove; 1003. Movable plate; 1004. First through groove; 1005. Second through groove; 1006. First connecting channel; 1007. Second connecting channel; 1008. First electric telescopic rod; 1009. Main air intake pipe; 1010. Branch air intake pipe; 1011. Air outlet nozzle; 1012. Second connecting pipe; 11. Separator; 12. Second electric telescopic rod. Detailed Implementation

[0020] To make the objectives, features, and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] Please see Figures 2-3This invention provides a high-efficiency classification device for rare earth polishing powder, comprising a housing 1, a bottom plate 2, and a cover plate 3. The cover plate 3 covers the top of the housing 1, and the bottom plate 2 abuts against the bottom of the housing 1. A feeding mechanism 4 is provided on the cover plate 3, which includes a conveying cylinder 403. A feeding port 404 is provided at one end of the upper surface of the conveying cylinder 403 for feeding the rare earth polishing powder to be classified into the conveying cylinder 403. A spiral conveying roller 402 is provided inside the conveying cylinder 403, and a first motor 401 is installed on the outer wall of the conveying cylinder 403. The output end of the first motor 401 is connected to one end of the spiral conveying roller 402. In addition, a first connecting pipe 501 is provided on the bottom wall of the spiral conveying roller 402 away from the feeding port 404. Therefore, after the first motor 401 is started, the first motor 401 will drive the spiral conveying roller 402 to rotate, and the spiral conveying roller 402 will forward convey the rare earth polishing powder put into the conveying cylinder 403 and discharge it into the first connecting pipe 501.

[0023] Please continue reading Figures 2-3 The housing 1 is equipped with a screening mechanism 5, which includes a screen frame 504. The screening mechanism 5 is used to screen rare earth polishing powder fed into the screen frame 504. The screening mechanism 5 also includes a feed pipe 502, the upper end of which is rotatably connected to a first connecting pipe 501. Specifically, the outer surface of the bottom end of the first connecting pipe 501 is interference-fitted with the inner ring of the bearing, and the upper end of the feed pipe 502 is interference-fitted with the outer ring of the bearing. The bottom end of the feed pipe 502 is tapered, and a tapered block 503 is fixedly connected to the inner wall of the bottom end of the feed pipe 502 via a connecting rod. Preferably, the tapered block 503 is located directly above the center of the screen frame 504. In addition, the feed pipe 502 is driven to rotate by a drive mechanism 6. Therefore, when the rare earth polishing powder enters the feed pipe 502 through the first connecting pipe 501, it will fall onto the conical block 503 and be dispersed by the conical block 503. When the drive mechanism 6 drives the feed pipe 502 to rotate, the rare earth polishing powder will be evenly sprinkled in the mesh frame 504 under the centrifugal action of the conical block 503.

[0024] To improve the screening efficiency of the screen frame 504, one side of the screen frame 504 abuts against the first cam 608, which is driven to rotate by the drive mechanism 6. Furthermore, a support rod 603 is fixedly connected to the outer surface of the screen frame 504. The end of the support rod 603 away from the screen frame 504 is slidably engaged with the first fixing sleeve 601, and the support rod 603 is connected to the bottom wall of the inner cavity of the first fixing sleeve 601 via a first spring 602. The first fixing sleeve 601 is installed on the inner wall of the housing 1. Preferably, the support rods 603 are arranged in pairs on the left and right sides of the screen frame 504. When the drive mechanism 6 drives the first cam 608 to rotate, the first cam 608 will intermittently squeeze the screen frame 504. With the cooperation of the support rod 603, the first spring 602 and the first fixed sleeve 601, the screen frame 504 will reciprocate, which is beneficial to improving the screening efficiency of the screen frame 504. The rare earth polishing powder passes through the mesh on the bottom wall of the screen frame 504, while the impurities in the rare earth polishing powder are retained in the screen frame 504.

[0025] Furthermore, a guiding mechanism 7 is provided directly below the screening mechanism 5, and an iron removal mechanism 8 is provided directly below the guiding mechanism 7. The iron removal mechanism 8 includes an electromagnet rod 801. The guiding mechanism 7 includes spaced-apart guide frames 702, positioned directly above the electromagnet rod 801. The number of guide frames 702 corresponds one-to-one with the number of electromagnet rods 801, and the guide frames 702 are fixedly connected together. The guide frames 702 at both ends are connected to the inner wall of the housing 1 via fixing plates 701. Preferably, the guide frame 702 has a V-shaped cross-section and an open bottom. The guide frame 702 is used to receive the rare earth polishing powder discharged from the mesh frame 504 and guide the rare earth polishing powder to fall onto the electromagnet rod 801.

[0026] Please see Figures 2-5To ensure the guide frame 702 smoothly guides the rare earth polishing powder onto the electromagnet rod 801, a vibration mechanism 9 is provided above the fixing plate 701. The vibration mechanism 9 includes a striking head 910 for vibrating the guide mechanism 7. The vibration mechanism 9 also includes a first movable rod 901, which drives the striking head 910 closer to or further away from the guide mechanism 7. Specifically, the first movable rod 901 is slidably fitted onto the first fixing sleeve 601, and a support rod 603 passes through the middle of the first movable rod 901. A notch is provided in the middle of the support rod 603, and one side of the notch is configured as a first inclined surface 6031. A second inclined surface 9012 is provided in the middle of the first movable rod 901 for engaging with the first inclined surface 6031; a third spring 902 is sleeved on the outer surface of the first movable rod 901, with both ends of the third spring 902 connected to the outer surface of the first fixing sleeve 601 and the top end of the first movable rod 901, respectively. Understandably, during the intermittent pressing of the screen frame 504 by the first cam 608, the first inclined surface 6031 on the support rod 603 will synchronously engage with the second inclined surface 9012, thereby driving the first movable rod 901 to move up and down, which in turn drives the striking head 910 to move up and down, vibrating the fixed plate 701. This facilitates the rare earth polishing powder falling into the guide frame 702 to slide down along the inner wall of the guide frame 702. Therefore, during the rotation of the first cam 608 driven by the drive mechanism 6, on the one hand, it can drive the screen frame 504 to reciprocate, improving the screening efficiency of the screen frame 504; on the other hand, it can synchronously drive the striking head 910 to move up and down, continuously striking the fixed plate 701, helping the rare earth polishing powder in the guide frame 702 to fall smoothly.

[0027] In some preferred embodiments, please refer to Figure 4 and Figure 5The vibration mechanism 9 further includes a second fixed sleeve 903, which is mounted on the outer surface of the first fixed sleeve 601. A second movable rod 904 is slidably fitted on the second fixed sleeve 903, and the second movable rod 904 is connected to the bottom wall of the inner cavity of the second fixed sleeve 903 via a fourth spring 905. Furthermore, a third fixed sleeve 906 is provided in the middle of the second movable rod 904, and a wedge block 908 is slidably fitted on the third fixed sleeve 906. The wedge block 908 is connected to the bottom wall of the inner cavity of the third fixed sleeve 906 via a fifth spring 907, and the upper surface of the wedge block 908 is set as an inclined surface. Additionally, a protrusion 9011 is provided at the bottom of the first movable rod 901 to cooperate with the wedge block 908, and a limiting block 909 is provided between the second movable rod 904 and the first movable rod 901. The bottom end of the limiting block 909 is set as an inclined surface adapted to the upper surface of the wedge block 908. Understandably, during the downward movement of the first movable rod 901, the protrusion 9011 on it comes into contact with the upper surface of the wedge block 908, and the protrusion 9011 will squeeze the wedge block 908, causing part of the wedge block 908 to retract into the third fixed sleeve 906; in this way, it will not prevent the protrusion 9011 from continuing to move downward to below the wedge block 908. Subsequently, the first movable rod 901 moves upward, at which point the protrusion 9011 contacts the lower surface of the wedge block 908, which will drive the wedge block 908, the third fixed sleeve 906, and the second movable rod 904 to move upward as a whole, and compress the third spring 902 until the upper surface of the wedge block 908 engages with the bottom end of the limiting block 909, so that the wedge block 908 retracts into the third fixed sleeve 906, and the protrusion 9011 no longer abuts against the wedge block 908; under the reset action of the third spring 902, the second movable rod 904 moves downward quickly, thereby driving the striking head 910 at the bottom end of the second movable rod 904 to strike the fixed plate 701, which helps to improve the vibration effect of the striking head 910.

[0028] Please continue reading Figure 2 and Figure 3The iron removal mechanism 8 includes several electromagnet rods 801 spaced apart, which are used to adsorb iron-containing impurities in rare earth polishing powder. The electromagnet rods 801 are mounted on a rotating rod, the two ends of which rotate on the inner wall of the housing 1. Additionally, a gear 802 is mounted on the outer surface of one end of the rotating rod, and all the gears 802 corresponding to the electromagnet rods 801 are meshed with a rack 803. The rack 803 is slidably disposed on the inner wall of the housing 1, one end of which is connected to the inner wall of the housing 1 via a second spring 804, and the end of the rack 803 away from the second spring 804 abuts against a second cam 609, which is also driven to rotate by the drive mechanism 6. Therefore, after the drive mechanism 6 drives the second cam 609 to rotate, the second cam 609 will intermittently squeeze the rack 803. Since the end of the rack 803 away from the second cam 609 is connected to the second spring 804, it will drive the rack 803 to move back and forth in the horizontal direction. The gear 802 that meshes with the rack 803 will rotate back and forth within a certain angle range as the rack 803 moves back and forth, which will cause the electromagnet rod 801 to rotate back and forth within a certain angle range. In this way, the rare earth polishing powder will continue to fall smoothly downwards, and impurities such as iron filings in the rare earth polishing powder will remain on the electromagnet rod 801.

[0029] It should be noted that the drive mechanism 6 includes a second motor 604 and a third motor 605. The output end of the second motor 604 is fixedly connected to a first rotating shaft 606, and the output end of the second motor 604 is fixedly connected to a second rotating shaft 607. A first cam 608 is mounted on the first rotating shaft 606, and a second cam 609 is mounted on the second rotating shaft 607. Furthermore, a drive wheel 610 is mounted on the first rotating shaft 606, and the drive wheel 610 is connected to a driven wheel 612 via a belt 611. The driven wheel 612 is mounted on the feed pipe 502. Therefore, as the second motor 604 drives the first cam 608 to rotate, it synchronously drives the feed pipe 502 to rotate. It is understandable that in practical applications, the second motor 604 is fully capable of driving the second rotating shaft 607 to rotate via a transmission mechanism, thus eliminating the cost of arranging the third motor 605.

[0030] Preferably, a support plate can be provided on the inner wall of the housing 1, and the support plate is provided with a bearing that rotates with the first rotating shaft 606 or the second rotating shaft 607, so that the first rotating shaft 606 and the second rotating shaft 607 rotate more smoothly.

[0031] Please continue reading Figure 2 and Figure 3To further refine the rare earth polishing powder and achieve a more ideal particle size, this application also includes an airflow pulverizing mechanism 10. This airflow pulverizing mechanism 10 utilizes the powerful impact and shearing forces generated by the high-speed airflow through the injection of high-pressure gas to efficiently pulverize the iron-removed rare earth polishing powder. The airflow pulverizing mechanism 10 includes air inlet branch pipes 1010 spaced along the inner walls of the housing 1, with both ends connected to an air outlet nozzle 1011 and an air inlet main pipe 1009, respectively. The airflow pulverizing mechanism 10 also includes a partition 1001 installed on the inner wall of the housing 1, which separates the iron removal mechanism 8 from the airflow pulverizing mechanism 10. The partition 1001 has several first through slots 1004, which correspond to the gaps between the two electromagnet rods 801. Therefore, when the electromagnet rod 801 reciprocates within a certain angle range, the rare earth polishing powder on it will fall into the first through groove 1004. The partition 1001 is also slidably fitted with a movable plate 1003 via a limiting groove 1002; the movable plate 1003 has several second through grooves 1005, and one end of the movable plate 1003 is connected to a first electric telescopic rod 1008, which is installed on the outer wall of the housing 1. When the first electric telescopic rod 1008 drives the movable plate 1003 to slide within the limiting groove 1002, the first through groove 1004 and the second through grooves 1005 will overlap or misalign. When the first through groove 1004 and the second through groove 1005 overlap, the rare earth polishing powder will enter the airflow pulverizing mechanism 10. Once a certain amount of rare earth polishing powder has entered the airflow pulverizing mechanism 10, the movable plate 1003 is driven to slide within the limiting groove 1002, causing the first through groove 1004 and the second through groove 1005 to be offset from each other. At this time, the air outlet nozzles 1011 around the control box 1 spray high-pressure airflow, and multiple supersonic airflows converge together. The rare earth polishing powder is accelerated and in a fluidized state. The rare earth polishing powder particles undergo violent collisions, friction, and shearing, thus being repeatedly crushed and ground into ultrafine particles, thereby achieving ultrafine pulverization of rare earth polishing powder.

[0032] In some preferred embodiments, please refer to Figure 1 , Figure 6 and Figure 7A first connecting channel 1006 is provided at the middle of the partition 1001, corresponding to the first through groove 1004. The first connecting channel 1006 is connected to the separator 11 through a second connecting pipe 1012. It should be noted that the separator 11 is a device for particle size classification of powder. Its core function is to classify the pulverized raw materials according to their volume and transport polishing powders of different sizes to different processes or collection points through pipelines. In this embodiment, the separator 11 can be a cyclone separator, or other separators 11 capable of achieving ultrafine particle classification. This application does not improve the specific structure of the separator 11; any separator 11 capable of achieving ultrafine particle classification is within the scope of protection of this application.

[0033] It should be noted that a second connecting channel 1007 is provided in the middle of the movable plate 1003. The second connecting channel 1007 is open at both ends, and one end of the second connecting channel 1007 extends to a position close to the center of the movable plate 1003. When the first electric telescopic rod 1008 drives the movable plate 1003 to slide relative to the limiting groove 1002, causing the first through groove 1004 and the second through groove 1005 to be misaligned, the first connecting channel 1006 and the second connecting channel 1007 will be connected to each other. Since the second connecting channel 1007 is provided on the movable plate 1003, the second connecting channel 1007 can extend to the center position inside the housing 1, which is exactly close to the equidistant convergence point of the jet airflow from the surrounding inner walls. Therefore, on the one hand, the rare earth polishing powder can be crushed by the impact of the high-pressure airflow ejected from multiple sets of air nozzles 1011, resulting in a good crushing effect; on the other hand, it is beneficial for the crushed powder to move upward with the airflow and enter the second connecting channel 1007, so that the crushed ultrafine particles can be discharged into the separator 11 through the second connecting channel 1007, the first connecting channel 1006 and the second connecting pipe 1012.

[0034] Preferably, the depth of the first through groove 1004 can be appropriately increased so that when the first through groove 1004 and the second through groove 1005 are staggered, the rare earth polishing powder can still fall into the first through groove 1004.

[0035] For preferred options, please refer to [link / reference]. Figure 2 and Figure 3The bottom of the housing 1 is provided with a bottom plate 2, and a sealing gasket is provided between the bottom plate 2 and the bottom of the housing 1. Second electric telescopic rods 12 are installed on the outer walls of both sides of the housing 1, and the telescopic ends of the second electric telescopic rods 12 are connected to the two sides of the bottom plate 2. By extending and retracting the second electric telescopic rods 12, the bottom plate 2 can be moved away from or closer to the bottom of the housing 1, achieving sealing and opening of the bottom of the housing 1. When the bottom of the housing 1 is sealed, the airflow pulverizing mechanism 10 can easily perform airflow pulverization on the powder; when the bottom of the housing 1 is open, the electromagnet rod 801 is de-energized, allowing the iron filings adsorbed on the electromagnet rod 801 to be discharged through the bottom of the housing 1. Preferably, the cover plate 3 can also be configured to move relative to the housing 1; specifically, the cover plate 3 is driven closer to or away from the housing 1 by the electric telescopic rod. Simultaneously, the first rotating shaft 606 and the second rotating shaft 607 are designed with their upper and lower ends keyed together, allowing the upper end to both drive the lower end to rotate and slide vertically relative to the lower end.

[0036] The working process of this invention is as follows: In specific use, the rare earth polishing powder is conveyed forward by the feeding mechanism 4 and discharged into the first connecting pipe 501. Then, the rare earth polishing powder enters the feeding pipe 502 through the first connecting pipe 501 and falls onto the conical block 503, where it is dispersed. Under the centrifugal force of the conical block 503, the rare earth polishing powder is evenly sprinkled into the screen frame 504. At this time, the first cam 608 intermittently squeezes the screen frame 504, thereby driving the screen frame 504 to reciprocate, which helps to improve the screening efficiency of the screen frame 504. During the screening process, impurities in the rare earth polishing powder are retained in the screen frame 504, while the rare earth polishing powder falls onto the electromagnet rod 801 under the guidance of the guiding mechanism 7. The electromagnet rod 801 adsorbs the iron-containing impurities in the rare earth polishing powder, and at the same time, the electromagnet rod 801 is driven by the driving mechanism 6. The rare earth polishing powder continues to fall smoothly downwards within a certain angle range, while impurities such as iron filings in the rare earth polishing powder remain on the electromagnet rod 801. The rare earth polishing powder continues to be discharged into the airflow pulverizing mechanism 10 through the first channel 1004 on the partition 1001. After a certain amount of rare earth polishing powder enters the airflow pulverizing mechanism 10, the air outlet nozzles 1011 around the control box 1 spray high-pressure airflow. Multiple supersonic airflows converge, and the rare earth polishing powder is accelerated and fluidized. The rare earth polishing powder particles undergo violent collisions, friction, and shearing, thus being repeatedly crushed and ground into ultrafine particles, thereby achieving ultrafine pulverization of rare earth polishing powder. Finally, the separator 11 classifies the pulverized raw materials according to their volume and transports rare earth polishing powder of different sizes to different processes or collection points through pipelines.

[0037] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0038] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0039] Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The reference to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily indicate the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0040] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A high-efficiency classification device for rare earth polishing powder, characterized in that, include: Box (1); Screening mechanism (5) is set in box (1). The screening mechanism (5) includes a screen frame (504). The screening mechanism (5) is used to screen rare earth polishing powder fed into the screen frame (504). Iron removal mechanism (8), the iron removal mechanism (8) includes a plurality of electromagnet rods (801) arranged at intervals, the electromagnet rods (801) are used to adsorb iron-containing impurities in rare earth polishing powder; The guiding mechanism (7) includes a guide frame (702) spaced apart. The guide frame (702) is located directly above the electromagnet rod (801). The guide frame (702) is used to receive the rare earth polishing powder discharged from the mesh frame (504) and guide the rare earth polishing powder to fall onto the electromagnet rod (801). Airflow pulverizing mechanism (10), the airflow pulverizing mechanism (10) is used to spray high-pressure gas to pulverize rare earth polishing powder after iron removal; Separator (11), the separator (11) is used to classify the crushed rare earth polishing powder according to its volume.

2. The high-efficiency classification device for rare earth polishing powder according to claim 1, characterized in that: The electromagnet rod (801) is mounted on the rotating rod. The two ends of the rotating rod rotate on the inner wall of the box (1). A gear (802) is mounted on the outer surface of one end of the rotating rod. All the electromagnet rods (801) are connected to a rack (803) by the corresponding gear (802). One end of the rack (803) is connected to the inner wall of the box (1) through the second spring (804). The end of the rack (803) away from the second spring (804) abuts against the second cam (609). The second cam (609) is driven to rotate by the drive mechanism (6).

3. The high-efficiency classification device for rare earth polishing powder according to claim 1, characterized in that: The mesh frame (504) abuts against the first cam (608) on one side. The first cam (608) is driven to rotate by the drive mechanism (6). A support rod (603) is fixedly connected to the outer surface of the mesh frame (504). The end of the support rod (603) away from the mesh frame (504) is slidably engaged with the first fixed sleeve (601). The support rod (603) is connected to the bottom wall of the inner cavity of the first fixed sleeve (601) through the first spring (602).

4. The high-efficiency classification device for rare earth polishing powder according to claim 3, characterized in that: It also includes a vibration mechanism (9), which includes a striking head (910) for vibrating the guide mechanism (7); the vibration mechanism (9) also includes a first movable rod (901), which is used to drive the striking head (910) to move closer to or away from the guide mechanism (7). The first movable rod (901) is slidably fitted on the first fixed sleeve (601), and a support rod (603) passes through the middle of the first movable rod (901). The support rod (603) has a notch in the middle, and one side of the notch is a first inclined surface (6031). The first movable rod (901) has a second inclined surface (9012) in the middle for cooperating with the first inclined surface (6031). The outer surface of the first movable rod (901) is fitted with a third spring (902) for resetting its position.

5. The high-efficiency classification device for rare earth polishing powder according to claim 4, characterized in that: The vibration mechanism (9) further includes a second fixed sleeve (903), on which a second movable rod (904) is slidably fitted. The second movable rod (904) is connected to the bottom wall of the inner cavity of the second fixed sleeve (903) by a fourth spring (905). A third fixed sleeve (906) is provided on the second movable rod (904), on which a wedge block (908) is slidably fitted. The wedge block (908) is connected to the bottom wall of the inner cavity of the third fixed sleeve (906) by a fifth spring (907). A protrusion (9011) is provided at the bottom of the first movable rod (901) to cooperate with the wedge block (908). A limit block (909) is provided between the second movable rod (904) and the first movable rod (901), and the bottom end of the limit block (909) is set as an inclined surface adapted to the upper surface of the wedge block (908).

6. The high-efficiency classification device for rare earth polishing powder according to claim 1, characterized in that: The guide frame (702) has a V-shaped cross-section.

7. The high-efficiency classification device for rare earth polishing powder according to claim 1, characterized in that: The airflow pulverizing mechanism (10) includes an air inlet branch pipe (1010) spaced on the inner walls of the box (1), with the two ends of the air inlet branch pipe (1010) connected to the air outlet nozzle (1011) and the air inlet main pipe (1009) respectively.

8. The high-efficiency classification device for rare earth polishing powder according to claim 7, characterized in that: The airflow pulverizing mechanism (10) includes a partition (1001) installed on the inner wall of the housing (1). The partition (1001) is used to separate the iron removal mechanism (8) and the airflow pulverizing mechanism (10). The partition (1001) is provided with a plurality of first through slots (1004). The first through slots (1004) correspond to the gap between the two electromagnet rods (801). The partition (1001) is also slidably fitted with a movable plate (1003) through a limiting slot (1002). The movable plate (1003) is provided with a plurality of second through slots (1005). One end of the movable plate (1003) is connected to a first electric telescopic rod (1008). The first electric telescopic rod (1008) is used to drive the movable plate (1003) to slide relative to the limiting slot (1002) so that the first through slots (1004) and the second through slots (1005) overlap or stagger each other.

9. The high-efficiency classification device for rare earth polishing powder according to claim 8, characterized in that: A first connecting channel (1006) is provided in the middle of the partition (1001) corresponding to the first through groove (1004). The first connecting channel (1006) is connected to the separator (11) through the second connecting pipe (1012). A second connecting channel (1007) is provided in the middle of the movable plate (1003). The second connecting channel (1007) is open at both ends, and one end of the second connecting channel (1007) extends to the center near the movable plate (1003). When the first electric telescopic rod (1008) drives the movable plate (1003) to slide relative to the limiting groove (1002), the first connecting channel (1006) and the second connecting channel (1007) will be connected to each other or separated.

10. The high-efficiency classification device for rare earth polishing powder according to claim 1, characterized in that: The screening mechanism (5) also includes a feed pipe (502), the upper end of which is rotatably connected to the first connecting pipe (501). The bottom end of the feed pipe (502) is conical, and a conical block (503) is fixedly connected to the inner wall of the bottom end of the feed pipe (502). The conical block (503) is located directly above the center of the mesh frame (504). The feed pipe (502) is driven to rotate by the drive mechanism (6).

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