Ingredient mixing device for rare earth permanent magnet material processing
By using multi -directional airflow and specially designed structures in the mixed device of rare earth permanent magnet materials, the problem of oxidation and agglomeration in the preparation process is solved, and more efficient mixed effects and material quality are achieved.
Patent Information
- Application Number
- CN202411912701.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-01-24
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Rare earth permanent magnet materials are prone to oxidation and agglomeration during the preparation process, resulting in poor mixing effect and difficult to meet the high requirements of material performance.
The mixed device for machining the machining of rare earth permanent magnet materials is designed. By setting up a collisioner, air duct, feeder, and multi -directional jet pipe in the mixture, the use of air flow can make powder -shaped materials suspended in the air flow and float in the airflow and float in the airflow and float in the airflow and float in the airflow and Pass the collision to achieve uniform mixing, and prevent oxidation by filtering and purifying gas.
It effectively avoids the agglomeration of rare earth permanent magnet materials during the preparation process, improves the mixing effect and material quality, and ensures that the performance of the final rare earth permanent magnet material reaches the standard.
Smart Images
Figure CN119345958A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of airflow mixing, in particular to a batching and mixing device for processing rare earth permanent magnetic materials. Background Art
[0002] Rare earth permanent magnet materials, especially neodymium iron boron (NdFeB) alloys, occupy an important position in the electronics, automotive, medical and other industries due to their excellent magnetic properties. However, this type of material is very prone to oxidation and agglomeration during the preparation process, which puts higher requirements on mixing technology. Airflow mixing technology is a powder material mixing method based on the principle of airflow kinetic energy and momentum. This technology achieves uniform mixing by suspending powdered materials in the airflow and colliding with each other. This technology has shown a wide range of application value in many fields such as materials science, chemical engineering, and pharmaceuticals. During the mixing process, the components must be mixed strictly in a specific proportion and order to ensure that the performance of the final material meets the standard. At present, the mainstream airflow mixing method is usually to place the materials to be mixed in a container, and then directly start the air nozzle to jet the materials. This method works well when processing ordinary materials, but it is incapable of dealing with materials with special properties such as rare earth permanent magnet materials. The particularity of rare earth permanent magnet materials requires higher mixing accuracy and more detailed mixing process control, and traditional airflow mixing methods are difficult to meet these requirements in terms of mixing effect. Therefore, the airflow mixing technology for rare earth permanent magnet materials needs to be further optimized and improved. Summary of the invention
[0003] In view of the problem of poor mixing effect in the process of preparing rare earth permanent magnetic materials in the prior art, the present invention proposes a batching and mixing device for processing rare earth permanent magnetic materials.
[0004] The technical solution of the present invention is to disclose a batching and mixing device for rare earth permanent magnet material processing, including a mixing barrel, a bumper is arranged in the mixing barrel, a plurality of dischargers are arranged on the top of the bumper, an air duct is arranged on the bumper, the discharger is connected with the air duct through a connecting pipe, and air inlets for supplying air to the air duct are arranged on both sides of the bumper; a conical barrel connected with the air duct is arranged at the bottom of the bumper, a blanking plate is also arranged in the mixing barrel, a conical convex block is arranged at the center of the blanking plate, the convex block is embedded in the bottom outlet of the conical barrel, and a plurality of air outlets are also arranged on the blanking plate that spread from the center to the surrounding areas A feeding trough, all of which are connected to the gap between the protrusion and the conical barrel; a mixing chamber is also provided in the mixing barrel, and the mixing chamber is located below the lower plate; a movable plate is provided at one end of each of the feeding troughs away from the protrusion, and the movable plate is movably connected to the bottom of the lower plate through a first spring; a plurality of first air jet tubes for blowing the movable plate are provided around the side wall of the mixing barrel; the feeding troughs are connected to or isolated from the mixing chamber as the movable plate moves; a plurality of second air jet tubes connected to the mixing chamber are provided around the bottom side of the mixing barrel; and a discharge port is provided at the bottom of the mixing barrel.
[0005] Furthermore, an exhaust column is arranged on the top of the conical cylinder, a detachable filter box is arranged on the impactor, an opening for accommodating the exhaust column is arranged at the bottom of the filter box, multiple layers of filter nets are arranged around the exhaust column in the filter box, and a sealing cover is also arranged on the top of the filter box.
[0006] Furthermore, the impactor is also provided with an air pump, which is connected to the filter box through an air pump pipe, and the mixing barrel is provided with an air outlet connected to the air pump.
[0007] Furthermore, a baffle is provided inside the exhaust column, and the baffle is movably mounted on the inner wall of the exhaust column through a plurality of second springs. A plurality of convex plates are provided on the top of the baffle, and a stop block matching with the convex plates is provided at the bottom of the filter box.
[0008] Furthermore, an exhaust pipe for exhausting the gas in the mixing chamber is provided on a side of the impactor facing the blanking plate, and the exhaust pipe is connected to the exhaust pipe.
[0009] Furthermore, a plurality of filters are arranged on the unloading plate, and one filter is arranged between every two adjacent feeding troughs.
[0010] Furthermore, the connecting pipe is located at the bottom of the feeder, an electronic scale is arranged above the connecting pipe, the electronic scale is movably installed in the feeder through a rotating shaft, a telescopic cylinder is arranged at the bottom of the electronic scale, and the electronic scale rotates around the rotating shaft as the telescopic cylinder moves.
[0011] Furthermore, a slide groove is provided at the bottom of the electronic scale, and the piston rod of the telescopic cylinder is located in the slide groove and can move along the slide groove.
[0012] Furthermore, a material blocking cover is provided in the mixing barrel, and the second air injection pipe sprays toward the space between the material blocking cover and the inner wall of the mixing barrel. The material blocking cover is provided with a plurality of through holes, and a rubber sheet is provided in each of the through holes, and the rubber sheet is provided with small holes.
[0013] Furthermore, the first air injection pipe and the second air injection pipe inject air into the mixing barrel in a clockwise direction or a counterclockwise direction, and the first air injection pipe and the second air injection pipe have different injection directions.
[0014] Compared with the prior art, the present invention can avoid the agglomeration of rare earth permanent magnet materials during the preparation process, which leads to poor mixing effect. The materials are mixed by multi-directional airflow to improve the mixing effect, while avoiding oxidation caused by the entry of external gas, thereby ensuring the quality of the final rare earth permanent magnet material. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.
[0017] Figure 2 It is a schematic diagram of the structure of the feeder of the present invention.
[0018] Figure 3 It is a schematic diagram of the internal structure of the feeder of the present invention.
[0019] Figure 4 It is a schematic diagram of the structure of the impactor of the present invention.
[0020] Figure 5 It is a schematic diagram of the internal structure of the impactor of the present invention.
[0021] Figure 6 It is a schematic diagram of the exhaust column structure of the present invention.
[0022] Figure 7 It is a schematic diagram of the internal structure of the mixing barrel of the present invention.
[0023] Figure 8 It is a schematic diagram of the blanking plate structure of the present invention.
[0024] Fig. 9 It is a schematic diagram of the structure of the material blocking cover of the present invention.
[0025] Among them, the mixing barrel 1; the mixing chamber 11; the first jet pipe 12; the second jet pipe 13; the material discharge port 14; the air outlet 15; the material blocking cover 16; the through hole 161; the feeder 2; the connecting pipe 21; the electronic scale 22; the rotating shaft 23; the telescopic cylinder 24; the impactor 3; the air duct 31; the air inlet 32; the conical barrel 33; the exhaust column 34; the baffle 341; the second spring 342; the vacuum pump 35; the exhaust pipe 351; the exhaust pipe 36; the unloading plate 4; the bump 41; the feeding trough 42; the filter 43; the movable plate 44; the first spring 45; the filter box 5; the filter net 51. DETAILED DESCRIPTION
[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0027] Thus, a feature indicated in this specification will be used to illustrate one of the features of an embodiment of the present invention, rather than implying that each embodiment of the present invention must have the described feature. In addition, it should be noted that this specification describes many features. Although some features can be combined together to illustrate possible system designs, these features can also be used in other combinations that are not explicitly described. Thus, unless otherwise stated, the described combinations are not intended to be limiting.
[0028] In the description of the present application, the terms “first” and “second” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.
[0029] In the description of the present application, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0030] The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments.
[0031] A batching and mixing device for processing rare earth permanent magnetic materials, comprising a mixing barrel 1, a bumper 3 is arranged in the mixing barrel 1, a plurality of feeders 2 are arranged on the top of the bumper 3, an air duct 31 is arranged on the bumper 3, the feeder 2 is connected with the air duct 31 through a connecting pipe 21, and air inlets 32 for supplying air to the air duct 31 are arranged on both sides of the bumper 3; a conical barrel 33 connected with the air duct 31 is arranged at the bottom of the bumper 3, a blanking plate 4 is also arranged in the mixing barrel 1, a conical convex block 41 is arranged at the center of the blanking plate 4, the convex block 41 is embedded in the bottom outlet of the conical barrel 33, and a plurality of feeding slots 42 are also arranged on the blanking plate 4, which spread from the center to the surroundings, All feeding grooves 42 are connected with the gap between the protrusion 41 and the conical cylinder 33; a mixing chamber 11 is also provided in the mixing barrel 1, and the mixing chamber 11 is located below the unloading plate 4, and a movable plate 44 is provided at one end of each feeding groove 42 away from the protrusion 41, and the movable plate 44 is movably connected to the bottom of the unloading plate 4 through a first spring 45. A plurality of first air injection pipes 12 for blowing the movable plate 44 are arranged around the side wall of the mixing barrel 1, and the feeding grooves 42 are connected with or isolated from the mixing chamber 11 as the movable plate 44 moves, and a plurality of second air injection pipes 13 connected with the mixing chamber 11 are arranged around the bottom side of the mixing barrel 1, and a discharge port 14 is arranged at the bottom of the mixing barrel 1.
[0032] Furthermore, an exhaust column 34 is arranged on the top of the conical cylinder 33, a detachable filter box 5 is arranged on the impactor 3, an opening for accommodating the exhaust column 34 is arranged at the bottom of the filter box 5, the filter box 5 has multiple layers of filter nets 51 arranged around the exhaust column 34, and a sealing cover is also arranged on the top of the filter box 5.
[0033] Furthermore, the impactor 3 is also provided with an air pump 35 , which is connected to the filter box 5 via an air pumping pipe 351 , and the mixing barrel 1 is provided with an air outlet 15 connected to the air pump 35 .
[0034] Furthermore, a baffle plate 341 is provided inside the exhaust column 34, and the baffle plate 341 is movably installed on the inner wall of the exhaust column 34 through multiple second springs 342. Multiple convex plates are provided on the top of the baffle plate 341, and a stop block matching the convex plates is provided at the bottom of the filter box 5.
[0035] Furthermore, an exhaust pipe 36 for exhausting the gas in the mixing chamber 11 is provided on one side of the impactor 3 facing the blanking plate 4 , and the exhaust pipe 36 is communicated with the exhaust pipe 351 .
[0036] Furthermore, a plurality of filters 43 are provided on the blanking plate 4 , and a filter 43 is provided between every two adjacent feeding troughs 42 .
[0037] Furthermore, the connecting pipe 21 is located at the bottom of the feeder 2, and an electronic scale 22 is arranged above the connecting pipe 21. The electronic scale 22 is movably installed in the feeder 2 through a rotating shaft 23. A telescopic cylinder 24 is arranged at the bottom of the electronic scale 22. The electronic scale 22 rotates around the rotating shaft 23 as the telescopic cylinder 24 moves.
[0038] Furthermore, a slide groove is provided at the bottom of the electronic scale 22, and the piston rod of the telescopic cylinder 24 is located in the slide groove and can move along the slide groove.
[0039] Furthermore, a material blocking cover 16 is provided in the mixing barrel 1, and the second jetting pipe 13 jets toward the space between the material blocking cover 16 and the inner wall of the mixing barrel 1. The material blocking cover 16 is provided with a plurality of through holes 161, and a rubber sheet is provided in each through hole 161, and a small hole is opened on the rubber sheet.
[0040] Furthermore, the first air jet pipe 12 and the second air jet pipe 13 jet toward the mixing barrel 1 in a clockwise direction or a counterclockwise direction, and the jet directions of the first air jet pipe 12 and the second air jet pipe 13 are different.
[0041] In a specific embodiment, Figures 1 to 9 As shown, the main body of a batching and mixing device for processing rare earth permanent magnetic materials proposed in the present application is a mixing barrel 1, inside which a bumper 3 is installed, and three independent feeders 2 are arranged on the top of the bumper 3, which are respectively used to feed different powdered materials to be mixed. A groove is embedded in the side wall of the bumper 3, and the groove of the side wall of the bumper 3 cooperates with the inner wall of the mixing barrel 1 to form an air duct 31. The three feeders 2 are all located above the air duct 31, and the bottom is equipped with a connecting pipe 21 connected to the air duct 31 to achieve effective communication with the inside of the air duct 31.
[0042] Here, one of the feeders 2 is arranged directly above the middle section of the air duct 31, while the other two feeders 2 are respectively placed above the two ends of the air duct 31. The mixing barrel 1 is provided with two air inlets 32 at the height where the impactor 3 is located, respectively located at the two ends of the air duct 31, for injecting gas into the air duct 31. It is worth noting that the air duct 31 is designed to be higher than the middle section at both ends. When the gas enters the air duct 31 through the air inlets 32 at both ends, an airflow field in a specific direction will be formed. At this time, the powdered materials in the three feeders 2 will be sucked into the air duct 31 through their respective connecting pipes 21. The materials released by the feeders 2 located above the two ends of the air duct 31 will move with the air flow to the middle section of the air duct 31, and collide and mix with the materials released from the feeders 2 located above the middle section of the air duct 31 in this area.
[0043] This design enables the powder materials to be mixed to achieve preliminary collision and mixing in the middle section of the air duct 31 during the discharge process of the three feeders 2. Specifically, when the gas enters the air duct 31 through the air inlets 32 arranged at both ends of the air duct 31, a directional airflow will be formed due to the shape of the air duct 31. This airflow will drive the powder materials entering from the bottom connecting pipe 21 of the feeder 2 to move along the air duct 31. The materials released by the feeders 2 located above the two ends of the air duct 31 will be carried to the middle section of the air duct 31 by the airflow, while the materials released by the feeders 2 located above the middle section of the air duct 31 will fall directly into this area. In this process, the powder materials from different feeders 2 will collide with each other in the middle section of the air duct 31, thereby achieving preliminary mixing.
[0044] The present application proposes a batching and mixing device for processing rare earth permanent magnetic materials, which is used for processing rare earth permanent magnetic materials, such as neodymium iron boron alloy, and is widely used in the electronics, automobile, medical and other industries due to its excellent magnetic properties. However, rare earth permanent magnetic materials are prone to agglomeration and oxidation problems during the preparation process. The present application uses the kinetic energy of the airflow to suspend the powdered materials in the airflow and collide with each other, thereby achieving uniform mixing. Specifically, the powdered materials begin to collide and mix in the process of entering the air duct 31 from the discharger 2. Compared with the traditional method of simply piling up the materials to be mixed and then mixing them, the design of the present invention enables the powdered materials to be gradually mixed during the feeding stage. This feature helps to more effectively break the original agglomeration state of the materials and promote mutual penetration and dispersion between different materials. Through this step-by-step and continuous mixing method, the powdered materials can complete preliminary uniform mixing in the middle section of the air duct 31, laying a solid foundation for the subsequent mixing process, thereby improving the mixing uniformity of the rare earth permanent magnetic materials during the preparation process.
[0045] Since rare earth permanent magnet materials are mainly composed of neodymium (Nd), iron (Fe) and boron (B), they also contain a series of auxiliary components, such as dysprosium (Dy), praseodymium (Pr), cobalt (Co), aluminum (Al), copper (Cu) and titanium (Ti), as well as some other additives, such as zirconium (Zr), niobium (Nb) and silicon (Si). During the mixing process, these components need to be mixed in a specific proportion and order to ensure that the performance of the final material meets the requirements. To this end, a plate-shaped electronic scale 22 is movably set inside each feeder 2. The electronic scale 22 is movably mounted on the inner wall of the feeder 2 through a rotating shaft 23 and is located above the connecting pipe 21. A telescopic cylinder 24 is provided at the bottom of the electronic scale 22, and the telescopic cylinder 24 drives the electronic scale 22 to rotate around the rotating shaft 23. To ensure the smoothness of movement, a slide groove is also designed at the bottom of the electronic scale 22, in which the piston rod of the telescopic cylinder 24 is embedded and can move smoothly along the slide groove to prevent the telescopic cylinder 24 from causing the electronic scale 22 to move. In actual use, the powdered material entering from the top of the feeder 2 falls on the electronic scale 22. Once the preset quality requirements are met, the telescopic cylinder 24 is started to drive the electronic scale 22 to flip around the rotating shaft 23, so that the powdered material on the surface of the electronic scale 22 falls into the connecting pipe 21 at the bottom of the feeder 2, and then enters the air duct 31 for subsequent mixing. This design ensures the accuracy of the component ratio.
[0046] Here, a conical cylinder 33 is arranged at the bottom of the impactor 3, and a channel connected to the conical cylinder 33 is arranged in the middle section of the air duct 31 toward the inside of the impactor 3. The materials that have been preliminarily mixed in the air duct 31 enter the conical cylinder 33 through this channel along with the air flow for further mixing. A blanking plate 4 is also arranged in the mixing cylinder 1, and a conical convex block 41 is arranged at the center of the blanking plate 4. The convex block 41 is embedded in the bottom outlet of the conical cylinder 33. The blanking plate 4 is also provided with a plurality of feeding grooves 42 that radiate from the center to the surroundings, and all the feeding grooves 42 are connected to the gap between the convex block 41 and the conical cylinder 33. When the preliminarily mixed material falls into the conical barrel 33, it first rotates and collides in the conical barrel 33 under the action of the airflow to further mix, and then falls to the bottom outlet of the conical barrel 33. Since the top of the protrusion 41 is designed to be conical, this shape can not only effectively break up the material clumps and significantly reduce the agglomeration phenomenon, but also ensure that the broken material can smoothly and evenly enter each feeding trough 42 from the gap between the protrusion 41 and the bottom outlet of the conical barrel 33, providing a more uniform material distribution for the subsequent mixing process, enhancing the mixing effect, and thus improving production efficiency.
[0047] In addition, a mixing chamber 11 is also provided in the mixing barrel 1, and the mixing chamber 11 is located below the unloading plate 4. The upper surface of the unloading plate 4 is designed to be high in the middle and low around, so as to facilitate the guidance and dispersion of the powdered material. The upper surface of the unloading plate 4 has a plurality of feeding grooves 42 that radiate from the center to the surroundings, ensuring that the material falling from the conical barrel 33 can move toward the outside of the unloading plate 4 along the feeding grooves 42 under the action of gravity. A movable plate 44 is provided at one end of each feeding groove 42 away from the protrusion 41, and each movable plate 44 is movably connected to the bottom of the unloading plate 4 through a first spring 45. Specifically, when the first jet pipe 12 sprays gas toward the mixing barrel 1, it can blow the movable plate 44 so that the movable plate 44 no longer blocks the feeding groove 42, allowing the feeding groove 42 and the mixing chamber 11 to communicate. When the first jet tube 12 stops jetting, the movable plate 44 blocks the feed trough 42 again under the action of the rebound force of the first spring 45, so that the feed trough 42 and the mixing chamber 11 are isolated. All the first jet tubes 12 are arranged in the same direction to generate a clockwise rotating airflow. A guide structure is also arranged on the movable plate 44. When the first jet tube 12 blows open the movable plate 44, the airflow forms a stronger clockwise rotation under the guiding action, further promoting the mixing of the materials. It is particularly critical that the flow rate of the airflow ejected by each first jet tube 12 is different. This design makes the material on the feed trough 42 fall into the mixing chamber 11. This difference in flow rate, one fast and one slow, causes relative movement between the materials. The material behind is attached to the material in front under the drive of the airflow, thereby achieving full mixing of the materials, improving the mixing efficiency, and ensuring the uniformity of the mixing.
[0048] Here, the second jet pipe 13 sprays toward the space between the blocking cover 16 and the inner wall of the mixing barrel 1. The blocking cover 16 is provided with a plurality of through holes 161, and all through holes 161 are tilted in the same direction to generate an airflow that rotates counterclockwise, thereby forming a contrast with the clockwise airflow generated by the first jet pipe 12. The rubber sheet provided in each through hole 161 allows the airflow in the space between the blocking cover 16 and the inner wall of the mixing barrel 1 to enter the mixing chamber 11 through the small holes on the rubber sheet, while the powdered material in the mixing chamber 11 cannot overflow through the small holes on the rubber sheet. This design ensures the unidirectional circulation of the airflow and the integrity of the materials in the mixing chamber 11. In actual operation, if the mixing effect of the materials after the clockwise airflow is not good, the first jet pipe 12 can be closed to isolate the feed trough 42 from the mixing chamber 11. Then the second jet pipe 13 is started to spray into the mixing chamber 11 to form a counterclockwise rotating airflow. This counterclockwise airflow will promote remixing of the materials in the mixing chamber 11, and its direction is opposite to the clockwise airflow generated by the first air injection pipe 12, which helps to break up the agglomeration structure that may be formed, further improving the uniformity and effect of mixing until an ideal mixing state is achieved.
[0049] In other embodiments, the setting positions of the first jet pipe 12 and the second jet pipe 13 may also be adjusted so that the first jet pipe 12 generates a counterclockwise airflow and the second jet pipe 13 generates a clockwise airflow, as long as the airflows generated by the first jet pipe 12 and the second jet pipe 13 are in opposite directions.
[0050] It should be noted that an exhaust column 34 is provided at the top of the conical cylinder 33, and the exhaust column 34 plays the role of air pressure regulation. A detachable filter box 5 is provided on the impactor 3, and an opening for accommodating the exhaust column 34 is provided at the bottom of the filter box 5, and the filter box 5 is sleeved on the exhaust column 34. In addition, a baffle plate 341 is provided inside the exhaust column 34, and a plurality of second springs 342 are provided at the bottom of the baffle plate 341. The baffle plate 341 is movably installed on the inner wall of the exhaust column 34 through the second springs 342, thereby realizing a flexible opening and closing function. A plurality of stop blocks are provided at the bottom of the filter box 5, and a plurality of convex plates cooperating with the stop blocks are provided at the top of the baffle plate 341. When the filter box 5 is installed on the exhaust column 34, the stop block abuts against the convex plate, the second spring 342 is compressed, and the baffle plate 341 moves downward to the bottom of the inner wall of the exhaust column 34, so that the exhaust column 34 can be exhausted. In the situation where the filter box 5 needs to be replaced, the operation process will be different. When the filter box 5 is disassembled or moved, the abutment between the stop block and the convex plate will be released, that is, the two will separate. At this time, the shielding plate 341 will move upward under the rebound force of the second spring 342 until the shielding plate 341 blocks the exhaust column 34. This prevents external gas from entering the mixing barrel 1 during the replacement of the filter box 5, ensuring the purity of the gas in the mixing barrel 1.
[0051] The filter box 5 has multiple layers of filter screens 51 arranged around the exhaust column 34, and a sealing cover is also arranged on the top of the filter box 5. In actual operation, the airflow entering the interior of the conical cylinder 33 from the air duct 31 will first enter the filter box 5 through the exhaust column 34 at the top. In the process of passing through the multiple layers of filter screens 51, the powdered materials in the airflow will be filtered layer by layer and remain in the filter box 5. This part of the material can be recovered by disassembling the filter box 5. An exhaust fan 35 is also arranged on the impactor 3, and the exhaust fan 35 is connected to the filter box 5 through an exhaust pipe 351. An outlet 15 connected to the exhaust fan 35 is arranged on the mixing cylinder 1. The filtered gas in the filter box 5 is extracted through the exhaust fan 35 to prevent the air pressure in the conical cylinder 33 from being too high.
[0052] In addition, after the gas in the mixing chamber 11 is purified by the filter 43, it enters the exhaust pipe 351 through the exhaust pipe 36 and is discharged from the air outlet 15 under the action of the exhaust fan 35. It ensures that the air pressure in the mixing chamber 11 can be maintained in a relatively stable range, providing a strong guarantee for the normal operation of the whole. In addition, on the surface of the mixing barrel 1, a sealing ring is also movably arranged at the height of the unloading plate 4, and the unloading plate 4 can be installed in the mixing barrel 1 or removed by opening or closing the sealing ring. After the unloading plate 4 is removed, a part of the powdered material filtered by the filter 43 can be recovered. A discharge port 14 connected to the mixing chamber 11 is also arranged at the bottom of the mixing barrel 1, and a baffle is arranged on the discharge port 14, which remains closed during the material mixing process. When all the powdered materials are mixed in the mixing barrel 1, the baffle can be opened to discharge the processed rare earth permanent magnet material from the discharge port 14.
[0053] It should be noted that in the present application, the gases entering from the air inlet 32, the first jet pipe 12 and the second jet pipe 13 are all argon. The reason for choosing argon is mainly based on the following considerations: First, in the mixing process of rare earth permanent magnet materials, argon, as an inert gas, can effectively isolate the oxygen in the air, thereby preventing the material from undergoing oxidation reaction. Secondly, the introduction of inert gas can also significantly reduce the agglomeration phenomenon between material particles, thereby improving the uniformity of mixing. Furthermore, argon has good thermal conductivity, and it can play a certain cooling role in the mixing process, effectively preventing the material from deteriorating due to temperature increase. It is particularly important that in the process of mixing rare earth permanent magnet materials, there will be a phenomenon of trace heat generation. If other gases such as nitrogen are used for mixing, these trace heat generation may cause the rare earth-rich phase on the material to react with nitrogen, resulting in nitridation of the grain boundary phase, thereby causing the reduction of the liquid phase, and ultimately reducing the squareness of the magnet. Therefore, the use of argon as the mixing gas can avoid these problems to the greatest extent and ensure the high-quality completion of the mixing process. In other embodiments, a gas analyzer may be installed in the mixing barrel 1 to monitor the gas composition inside the mixing barrel 1 in real time. If the mixing of other gases is detected, an alarm may be immediately sounded to remind the operator to take corresponding measures. And before starting the present application to propose a batching and mixing device for rare earth permanent magnetic material processing, argon gas may be first delivered into the mixing barrel 1 through the air inlet 32, the first jet pipe 12 and the second jet pipe 13 to exclude air or other gases that may exist inside, so as to ensure that the mixing barrel 1 is filled with pure argon gas. A one-way valve is installed at the air outlet 15, which only allows gas to be discharged from the inside of the mixing barrel 1 to the outside, preventing external gas from entering the mixing barrel 1.
[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A mixing device for processing rare earth permanent magnet materials, comprising a mixing drum (1), characterized in that: A material bumper (3) is provided in the mixing barrel (1), a plurality of material dischargers (2) are provided on the top of the material bumper (3), an air duct (31) is provided on the material bumper (3), the material dischargers (2) are connected to the air duct (31) via a connecting pipe (21), and air inlets (32) for supplying air to the air duct (31) are provided on both sides of the material bumper (3); A conical cylinder (33) communicating with the air duct (31) is arranged at the bottom of the impactor (3); a blanking plate (4) is also arranged in the mixing cylinder (1); a conical convex block (41) is arranged at the center of the blanking plate (4); the convex block (41) is embedded in the bottom outlet of the conical cylinder (33); a plurality of feeding grooves (42) are also arranged on the blanking plate (4) and spread out from the center to the surroundings; all the feeding grooves (42) are communicated with the gap between the convex block (41) and the conical cylinder (33); A mixing chamber (11) is further provided in the mixing barrel (1), and the mixing chamber (11) is located below the lower plate (4). A movable plate (44) is provided at one end of each feeding trough (42) away from the protrusion (41), and the movable plate (44) is movably connected to the bottom of the lower plate (4) via a first spring (45). A plurality of first air jet tubes (12) for blowing the movable plate (44) are provided around the side wall of the mixing barrel (1). The feeding trough (42) is connected to or isolated from the mixing chamber (11) as the movable plate (44) moves. A plurality of second air jet tubes (13) connected to the mixing chamber (11) are provided around the bottom side of the mixing barrel (1), and a discharge port (14) is provided at the bottom of the mixing barrel (1).
2. The rare earth permanent magnet material processing batching and mixing device according to claim 1, characterized in that: An exhaust column (34) is arranged at the top of the conical cylinder (33), a detachable filter box (5) is arranged on the impactor (3), an opening for accommodating the exhaust column (34) is arranged at the bottom of the filter box (5), multiple layers of filter screens (51) are arranged around the exhaust column (34), and a sealing cover is also arranged at the top of the filter box (5).
3. The rare earth permanent magnet material processing batching and mixing device according to claim 2, characterized in that: The impactor (3) is also provided with an air pump (35), the air pump (35) being connected to the filter box (5) via an air pump pipe (351), and the mixing cylinder (1) is provided with an air outlet (15) connected to the air pump (35).
4. The rare earth permanent magnet material processing batching and mixing device according to claim 3, characterized in that: A shielding plate (341) is provided inside the exhaust column (34); the shielding plate (341) is movably mounted on the inner wall of the exhaust column (34) via a plurality of second springs (342); a plurality of convex plates are provided on the top of the shielding plate (341); and a stop block cooperating with the convex plates is provided at the bottom of the filter box (5).
5. The rare earth permanent magnet material processing batching and mixing device according to claim 3, characterized in that: An exhaust pipe (36) for exhausting gas in the mixing chamber (11) is provided on one side of the impactor (3) facing the blanking plate (4), and the exhaust pipe (36) is communicated with the exhaust pipe (351).
6. The rare earth permanent magnet material processing batching and mixing device according to claim 5, characterized in that: A plurality of filters (43) are provided on the unloading plate (4), and one filter (43) is provided between every two adjacent feeding troughs (42).
7. The device for mixing ingredients for processing rare earth permanent magnet materials according to claim 1, characterized in that: The connecting pipe (21) is located at the bottom of the feeder (2); an electronic scale (22) is arranged above the connecting pipe (21); the electronic scale (22) is movably installed in the feeder (2) via a rotating shaft (23); a telescopic cylinder (24) is arranged at the bottom of the electronic scale (22); the electronic scale (22) rotates around the rotating shaft (23) as the telescopic cylinder (24) moves.
8. The rare earth permanent magnet material processing batching and mixing device according to claim 7, characterized in that: A slide groove is provided at the bottom of the electronic scale (22), and the piston rod of the telescopic cylinder (24) is located in the slide groove and can move along the slide groove.
9. The device for mixing ingredients for processing rare earth permanent magnet materials according to claim 1, characterized in that: A material blocking cover (16) is also provided in the mixing barrel (1), and the second air injection pipe (13) injects air toward the material blocking cover (16) and the space between the inner wall of the mixing barrel (1). The material blocking cover (16) is provided with a plurality of through holes (161), and a rubber sheet is provided in each of the through holes (161), and the rubber sheet is provided with small holes.
10. The device for mixing ingredients for processing rare earth permanent magnet materials according to claim 9, characterized in that: The first jet pipe (12) and the second jet pipe (13) jet into the mixing barrel (1) in a clockwise direction or a counterclockwise direction, and the jet directions of the first jet pipe (12) and the second jet pipe (13) are different.