Gas atomization pulverization device and pulverization method for Fe-Si-Al magnetic powder alloy

Abstract

The invention relates to the technical field of metal pulverization, in particular to a gas atomization pulverization device and pulverization method for Fe-Si-Al magnetic powder alloy.The gas atomization pulverization device comprises a horizontal rack, supporting frames which are symmetrical in the length direction of the horizontal rack are installed on the horizontal rack, and a pulverization box which is of a funnel-shaped structure and provided with an opening facing the horizontal rack is jointly installed between the two supporting frames; a spraying pipe for spraying out liquid metal is rotationally installed at the top of the powder manufacturing box through a bearing, a collecting mechanism is arranged on the powder manufacturing box, and in the collecting mechanism, a plurality of annular baffles are matched with the powder manufacturing box to divide the powder manufacturing box into a plurality of powder manufacturing spaces. The displacement distances of the metal solution droplets in the powder making spaces are different, then the droplets form metal powder of different particle sizes, the metal powder of different particle sizes can fall into the collecting frame under the guide of the annular baffle, and therefore the metal powder of different particle sizes can be prepared and collected at the same time.

Description

Technical Field

[0001] This application relates to the technical field of metal powder making, and particularly relates to an air atomization powder making device and method for an iron-silicon-aluminum magnetic powder alloy. Background Art

[0002] The air atomization powder making of iron-silicon-aluminum magnetic powder alloy is an advanced powder metallurgy technology, which is widely used in fields such as electrical steel, mechanical parts, and electronic components. Traditional powder making methods such as ball milling and electrolysis produce powders with a wide particle size distribution and a single morphology, which cannot meet the strict requirements of modern industry for fine, uniform, and high-performance powders. In contrast, the air atomization powder making technology atomizes liquid metal into tiny droplets through a high-speed air flow and solidifies them into powders after cooling, having the advantages of fine powder particle size, uniform distribution, and high production efficiency. Especially when preparing an iron-silicon-aluminum magnetic powder alloy, the air atomization technology can effectively control the accuracy of alloy composition and microstructure, thereby improving the mechanical properties and electromagnetic properties of the final product.

[0003] For example, the patent application with the publication number CN212350372U discloses a metal magnetic powder core air atomization powder making device. Metal raw materials are added through the feed port at the upper end of the machine body. The melting hopper is limited by the chute and pulley structure and the semi-circular chute to ensure the stability of the melting hopper during the melting process. The heating ring and temperature control panel in the melting hopper precisely control the temperature and automatically monitor the melting process to ensure uniform melting of the metal. The storage hopper supplies materials to the atomizer transformer through the feeding hopper, and the transformer sprays the metal at high pressure to form fine metal particles, realizing high-precision air atomization powder making.

[0004] However, when using the above existing technology to atomize liquid metal into metal powder, there are still the following problems: In the existing powder making process, the particle size distribution of metal particles is significantly affected by the spraying path. That is, the moving path of metal particles with larger mass is farther, that is, the particle size of particles in the area closer to the feeding hopper is much smaller than that in the distal area.

[0005] Since this existing technology does not classify and collect metal powders, metal powders with different particle sizes are mixed and stacked during the recycling process, resulting in different particle sizes of the final product. The specific surface area of powders with different particle sizes increases, and it is easy to form an explosive mixture after contacting with air, and the powder is prone to spontaneous combustion or even explosion, increasing the risk coefficient. Summary of the Invention

[0006] In order to solve the above technical problems, this application provides an air atomization powder making device and method for an iron-silicon-aluminum magnetic powder alloy, and adopts the following technical solutions: In a first aspect, an air atomization powder making device for an iron-silicon-aluminum magnetic powder alloy includes a horizontal frame. On the horizontal frame, there are symmetrically installed support frames along its length direction. Between the two support frames, there is jointly installed a powder making box with an opening facing the horizontal frame and having a funnel-shaped structure. The top of the powder making box is rotatably installed with a spray pipe for spraying liquid metal through a bearing. A collection mechanism is arranged on the powder making box, including: A plurality of annular baffles are arranged in a multi-layer concentric ring structure with decreasing diameters, concentric with the powder making box and slidably penetrating along the depth direction of the powder making box at the bottom of the powder making box.

[0007] Preferably, the collection mechanism further includes: A plurality of lifting cylinders are provided, corresponding to the annular baffles one by one. Each group of lifting cylinders is symmetrically distributed along the length direction of the horizontal frame to change the height of the annular baffle.

[0008] Support rods are installed on the horizontal frame and correspond to the lifting cylinders one by one. One end of the support rod away from the horizontal frame is installed at the bottom of the powder making box to support the part of the bottom of the powder making box separated by the annular baffle.

[0009] Preferably, a cleaning member for scraping off the metal powder adhered to the annular baffle is further installed on the powder making box, including: A moving block is arranged on the top of the powder making box, moving along the length direction of the horizontal frame and at the same time moving along the height direction of the powder making box.

[0010] A through groove is opened on the top of the powder making box and is matched with the moving block.

[0011] A cleaning roller is rotatably penetrated on the moving block. One end of the cleaning roller away from the moving block passes through the through groove and is arranged inside the powder making box.

[0012] Preferably, guiding plates matched with the moving block are installed on both sides of the through groove at the top of the powder making box to lift the height of the moving block.

[0013] Preferably, a first pulley and a second pulley are respectively installed on the spray pipe and the cleaning roller shaft head. A belt is jointly installed on the first pulley and the second pulley. A compensation part for adjusting the real-time tightness of the belt is further installed on the powder making box.

[0014] Preferably, the compensation part includes: A first limiting sleeve is slidably limited on the spray pipe and slides along the height direction of the spray pipe, and a first gear is installed on the first limiting sleeve.

[0015] A linkage block is slidably arranged on the top of the powder making box. There is a fixed protrusion on the top of the powder making box. A telescopic spring rod for resetting the linkage block is jointly installed between the fixed protrusion and the linkage block. The top of the linkage block is rotatably installed with a linkage rod through a bearing.

[0016] The second limiting sleeve is slidably arranged on the linkage rod in a limiting manner, and a third pulley is installed on the second limiting sleeve, and the belt is installed on the third pulley.

[0017] Preferably, a telescopic plate is installed on the moving block, the telescopic end of the telescopic plate is installed on the first limiting sleeve, a telescopic rod is installed on the first limiting sleeve through a bearing, and the end of the telescopic rod away from the first limiting sleeve is installed on the second limiting sleeve through a bearing.

[0018] Preferably, a collection box for collecting metal powder is arranged in the middle of the horizontal frame, a plurality of annular tracks corresponding to each group of lifting cylinders are opened on the horizontal frame, sliding blocks are arranged inside the annular tracks, and each group of lifting cylinders is installed on the sliding blocks inside the corresponding annular tracks.

[0019] Preferably, an annular groove is opened inside the annular baffle, and two circular holes communicating with the annular groove are opened at the bottom of the annular baffle.

[0020] In a second aspect, a gas atomization powder making method for an iron-silicon-aluminum magnetic powder alloy includes the following steps: S1: Pretreatment, determine the diameter of the required metal powder, and push the corresponding annular baffle upward, and the annular baffle and the powder making box form a powder making space.

[0021] S2: Feeding treatment, pour the molten metal solution into the spray pipe, and at this time rotate the spray pipe, and the spray pipe sprays the metal solution in the form of a spray into the powder making space through inert gas.

[0022] S3: Powder making treatment, the metal solution sprayed into the powder making space is cooled to form metal powder.

[0023] S4: Collection treatment, the cooled metal powder falls into the collection box through the opening at the bottom of the powder making box.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. In the collection mechanism designed by the present invention, a plurality of annular baffles cooperate with the powder making box to divide the powder making box into a plurality of powder making spaces. When the spray pipe sprays the metal solution, the displacement distances of the metal solution droplets in each powder making space are different, and then the droplets form metal powders with different particle sizes. These metal powders with different particle sizes can fall into the collection box under the guidance of the annular baffle, so as to realize the simultaneous preparation and collection of metal powders with different particle sizes.

[0025] 2. In the present invention, the rotating cleaning roller can effectively clean the metal powder adhering to the annular baffle during rotation, preventing the surface of the annular baffle from thickening due to long-term accumulation of this metal powder, thus affecting the subsequent cooling effect, and at the same time reducing the unnecessary loss of metal powder; the cleaning roller applies a circumferential force to the metal powder adhering to the annular baffle through its own rotation, enhancing the cleaning effect and ensuring that the annular baffle always maintains a good cleaning state and cooling performance.

[0026] 3. During the rotation of the spray pipe designed in the present invention, it can cooperate with the compensation part through a belt drive method to drive the cleaning roller to rotate synchronously, reducing the use of existing drives. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic three-dimensional structure diagram of the present invention.

[0028] Figure 2 is a schematic three-dimensional installation structure diagram among the powder making box, spray pipe, annular baffle, etc. of the present invention.

[0029] Figure 3 is of the present invention Figure 2 partial enlarged view of A.

[0030] Figure 4 is a schematic internal structure diagram of the annular baffle of the present invention.

[0031] Figure 5 is of the present invention Figure 4 partial enlarged view of B.

[0032] Figure 6 is a schematic three-dimensional installation structure diagram among the guide plate, compensation part, cleaning roller, etc. of the present invention.

[0033] Figure 7 is of the present invention Figure 6 partial enlarged view of C.

[0034] Figure 8 is of the present invention Figure 6 partial enlarged view of D.

[0035] Figure 9 is a flow chart of the gas atomization powder making method of the Fe-Si-Al magnetic powder alloy of the present invention.

[0036] Description of reference numerals: 1. Horizontal frame; 11. Collection box; 12. Sliding block; 2. Support frame; 3. Powder making box; 31. Cleaning member; 311. Moving block; 312. Through groove; 313. Cleaning roller; 314. Telescopic plate; 32. Guide plate; 4. Spray pipe; 41. Pulley 1; 42. Pulley 2; 43. Belt; 44. Compensation part; 441. Limit sleeve 1; 442. Linking block; 443. Telescopic spring rod; 444. Linking rod; 445. Limit sleeve 2; 446. Pulley 3; 447. Telescopic rod; 5. Collection mechanism; 51. Annular baffle; 511. Annular groove; 512. Round hole; 52. Lifting cylinder; 53. Support rod. Detailed implementation manners

[0037] The following further elaborates on this application Figures 1 to 9 in conjunction with the attached drawings.

[0038] The embodiment of this application discloses an air atomization powder making device and a powder making method for an iron-silicon-aluminum magnetic powder alloy, which can produce metal powders with different particle sizes and can simultaneously collect and process metal powders with different particle sizes.

[0039] Embodiment 1: Referring to Figure 1 and Figure 2 , an air atomization powder making device for an iron-silicon-aluminum magnetic powder alloy includes a horizontal frame 1, symmetrically arranged support frames 2 along the length direction of the horizontal frame 1, a powder making box 3 with an opening facing the horizontal frame 1 and having a funnel-shaped structure is commonly installed between the two support frames 2, a spray pipe 4 for spraying liquid metal is rotatably installed at the top of the powder making box 3 through a bearing, and a collection mechanism 5 is arranged on the powder making box 3, including: Annular baffles 51, which are provided in multiple layers and have a multi-layer concentric ring structure with diameters decreasing, are concentric with the powder making box 3 and are slidably arranged through the powder making box 3 along the depth direction of the powder making box 3 at the bottom.

[0040] The multiple annular baffles 51 cooperate with the powder making box 3 to divide the powder making box 3 into multiple powder making spaces. When the spray pipe 4 sprays the metal solution, the displacement distances of the metal solution droplets in each powder making space are different, and thus the droplets form metal powders with different particle sizes. These metal powders with different particle sizes can fall into the collection box 11 under the guidance of the annular baffles 51, thereby realizing the simultaneous preparation and collection of metal powders with different particle sizes.

[0041] Referring to Figure 2 and Figure 3 , the collection mechanism 5 further includes: Lifting cylinders 52, which are provided in multiple groups corresponding to the annular baffles 51 one by one. Each group of lifting cylinders 52 is symmetrically distributed along the length direction of the horizontal frame 1 and is used to change the height of the annular baffles 51.

[0042] The support rod 53 is installed on the horizontal frame 1 and corresponds to the lifting cylinder 52 one by one. One end of the support rod 53 away from the horizontal frame 1 is installed at the bottom of the powder making tank 3, and is used to support the bottom part of the powder making tank 3 separated by the annular baffle 51.

[0043] During specific operation, according to the diameter of the required metal powder, the lifting cylinder 52 is started. During the movement of the telescopic end of the lifting cylinder 52, the corresponding annular baffle 51 is driven to move upward. When the top of the annular baffle 51 reaches the top of the powder making tank 3, the lifting cylinder 52 is closed. At this time, a powder making space is formed between the corresponding annular baffle 51 and the powder making tank 3. Then, the molten metal solution is poured into the internal part of the spray pipe 4. At this time, the spray pipe 4 rotates, and by introducing an inert gas into the internal part of the spray pipe 4, the molten metal solution can be discharged into the powder making space in a granular form. The metal liquid collides with the annular baffle 51 in the powder making space and then generates smaller droplets. After the droplets are cooled, metal powder is obtained immediately.

[0044] Therefore, according to the centrifugal force calculation formula (common knowledge in the art, not shown), it can be obtained that the impact force of the droplets falling on the annular baffle 51 closer to the spray pipe 4 is greater. The impact kinetic energy of the metal droplets increases, the metal droplets are broken more fully, and the particle size of the metal powder is significantly reduced. Therefore, the particle size of the metal powder shows a gradually decreasing gradient distribution from the side wall of the powder making tank 3 towards its center direction. Thus, metal powders with different particle sizes can be prepared through the mutual cooperation of the spray pipe 4 and the annular baffle 51.

[0045] The prepared metal powder fills the internal part of the powder making space, and finally the metal powder is deposited and falls outwards through the outlet of the powder making tank 3.

[0046] Since the annular baffle 51 is arranged through the bottom of the powder making tank 3, the support rod 53 supports the part of the bottom of the powder making tank 3 separated by the annular baffle 51 during the use of the device.

[0047] Refer to Figure 3 and Figure 4 In order to ensure that the metal liquid does not adhere to the annular baffle 51, the annular baffle 51 designed in the present invention can also play a cooling role. Specifically, a collection frame 11 for collecting metal powder is arranged in the middle of the horizontal frame 1. A plurality of annular tracks corresponding to each group of lifting cylinders 52 are opened on the horizontal frame 1. A sliding block 12 is arranged inside the annular track, and each group of lifting cylinders 52 is installed on the sliding block 12 inside the corresponding annular track.

[0048] Refer to Figure 5 An annular groove 511 is opened inside the annular baffle 51, and two circular holes 512 communicating with the annular groove 511 are opened at the bottom of the annular baffle 51.

[0049] During specific operation, any circular hole 512 corresponding to the annular baffle 51 is selected, and the water outlet of an existing water pump (not shown in the figure) is connected to the circular hole 512. Then, any circular hole 512 corresponding to the annular baffle 51 is connected to an existing waste water collection cylinder (not shown in the figure). Further, the existing water pump pumps water into the annular groove 511 through the circular hole 512. The water flows through the annular groove 511 and flows out from another circular hole 512. The flowing water inside the annular groove 511 can drive the temperature on the surface of the corresponding annular baffle 51, so that when the subsequent metal droplets impact on the surface of the annular baffle 51, cooling treatment can be carried out.

[0050] It should be noted that the rotation direction of the spray pipe 4 is opposite to that of the annular baffle 51, that is, the linear velocity direction of the molten metal is opposite to the rotation direction of the annular baffle 51. During the powder making process, an existing electric slider (not shown in the figure) drives the corresponding sliding block 12 of the annular baffle 51 to move inside the annular track. During the circumferential movement of the sliding block 12, the corresponding annular baffle 51 is driven to rotate circumferentially by the lifting cylinder 52. During the circumferential rotation of the annular baffle 51, a reverse impact force can be provided to the molten metal, and then this reverse impact force can cause violent turbulence of the metal droplets at the baffle.

[0051] Thus, an additional shear force can be given to the metal droplets. At the same time, the rotation direction of the molten metal is opposite to that of the annular baffle 51, so that a vortex recirculation zone is formed inside the powder making space, which can extend the flight path of the metal droplets. Therefore, during the flight of the metal droplets, uniform heat dissipation and cooling can be promoted, providing thermodynamic conditions for the formation of the oxide film of the metal powder and the refinement of the particle size of the metal powder, avoiding the defect of hollow powder caused by premature solidification of the metal droplets, and ensuring the density of the metal powder.

[0052] Refer to Figure 6 and Figure 7 In order to avoid the possibility that the cooling effect of the annular baffle 51 is poor due to the relatively thick side wall on the side where the annular baffle 51 contacts the metal droplets, the cleaning member 31 provided by the present invention can solve the above problems. Specifically, a cleaning member 31 for scraping the metal powder adhered to the annular baffle 51 is further installed on the powder making box 3, including: A moving block 311 is arranged on the top of the powder making box 3 and moves along the length direction of the horizontal frame 1 and at the same time moves along the height direction of the powder making box 3.

[0053] A through groove 312 is opened on the top of the powder making box 3 and is matched with the moving block 311.

[0054] A cleaning roller 313 is rotatably penetrated through the moving block 311. One end of the cleaning roller 313 away from the moving block 311 passes through the through groove 312 and is arranged inside the powder making box 3.

[0055] During specific operation, when the corresponding annular baffle 51 moves to the designated position, an external driving force (such as a cylinder) is used to push the moving block 311 to move. During the movement of the moving block 311, the cleaning roller 313 is driven to move to the side where the corresponding annular baffle 51 contacts the metal droplet. At this time, the circumference of the cleaning roller 313 abuts against the annular baffle. During the rotation of the annular baffle 51, it cooperates with the self-rotating cleaning roller 313. The self-rotating cleaning roller 313 can effectively clean the metal powder adhered to the annular baffle 51 during rotation, preventing the surface of the annular baffle 51 from thickening due to long-term accumulation of this metal powder, thus affecting the subsequent cooling effect and reducing the unnecessary loss of metal powder at the same time; the cleaning roller 313 applies a circumferential force to the metal powder adhered to the annular baffle 51 through its own rotation, enhancing the cleaning effect and ensuring that the annular baffle 51 always maintains a good cleaning state and cooling performance.

[0056] The prepared metal powder leaks out from the bottom of the powder-making box 3 and falls into the collection box 11.

[0057] Refer to Figure 7 As shown in [reference number], since the bottom of the powder-making box 3 is of a conical structure, in order to ensure that the cleaning roller 313 fully fits with the annular baffle 51 without colliding with the inner bottom of the powder-making box 3, guiding plates 32 that cooperate with the moving block 311 are installed on both sides of the through groove 312 at the top of the powder-making box 3 designed in the present invention, for lifting the height of the moving block 311.

[0058] The side of the guiding plate 32 close to the moving block 311 is set as an inclined structure, and the inclination of the inclined structure of the guiding plate 32 is the same as the inclination of the conical structure at the bottom of the powder-making box 3. During specific operation, the moving block 311 is limited to slide on the inclined surface of the guiding plate 32. During the movement of the moving block 311, it contacts the inclined surface of the guiding plate 32 and is lifted upward. Thus, during the movement of the moving block 311, the cleaning roller 313 can be driven to move upward synchronously, ensuring that the cleaning roller 313 fully fits with the annular baffle 51 without colliding with the inner bottom of the powder-making box 3.

[0059] Refer to Figures 6 to 8 As shown in [reference number], in order to reduce the use of existing drives, the pulley one 41 provided in the present invention can drive the cleaning roller 313 to rotate synchronously during the rotation of the spray pipe 4 through the cooperation of the pulley one 41 and the pulley two 42 via the belt 43. Specifically, a pulley one 41 and a pulley two 42 are respectively installed on the shaft heads of the spray pipe 4 and the cleaning roller 313, and a belt 43 is commonly installed on the pulley one 41 and the pulley two 42. A compensation part 44 for adjusting the real-time tightness of the belt 43 is also installed on the powder-making box 3.

[0060] The compensation part 44 includes: A limiting sleeve one 441, which is limited to slide on the spray pipe 4 and slide along the height direction of the spray pipe 4, and the pulley one 41 is installed on the limiting sleeve one 441.

[0061] The linkage block 442 is slidably arranged on the top of the powder making box 3. There are fixed protrusions arranged on the top of the powder making box 3. A telescopic spring rod 443 for resetting the linkage block 442 is jointly installed between the fixed protrusions and the linkage block 442. A linkage rod 444 is rotatably installed on the top of the linkage block 442 through a bearing.

[0062] The second limiting sleeve 445 is limited and slidably arranged on the linkage rod 444, and a third pulley 446 is installed on the second limiting sleeve 445, and the belt 43 is installed on the third pulley 446.

[0063] A telescopic plate 314 is installed on the moving block 311. The telescopic end of the telescopic plate 314 is installed on the first limiting sleeve 441. A telescopic rod 447 is installed on the first limiting sleeve 441 through a bearing. One end of the telescopic rod 447 away from the first limiting sleeve 441 is installed on the second limiting sleeve 445 through a bearing.

[0064] During specific operation, when the spray pipe 4 rotates, it drives the first pulley 41 to rotate through the first limiting sleeve 441. The first pulley 41 drives the cleaning roller 313 to rotate through the cooperation of the belt 43 and the second pulley 42. During this process, the moving block 311 drives the cleaning roller 313 to move synchronously towards the corresponding annular baffle 51. When the moving block 311 slides along the inclined surface of the guiding plate 32, it moves upward synchronously. During the upward movement of the moving block 311, it drives the first limiting sleeve 441 to move upward synchronously through the telescopic plate 314. Furthermore, the telescopic plate 314 and the first limiting sleeve 441 cooperate with each other to ensure that the first pulley 41 and the second pulley 42 are always on the same horizontal plane.

[0065] During the above process, the length of the belt 43 between the first pulley 41 and the second pulley 42 is always in a changing state. When the moving block 311 moves, it drives the first pulley 41 to move through the cleaning roller 313. When the first pulley 41 moves, it drives the third pulley 446 to move synchronously through the belt 43. When the third pulley 446 moves, it drives the linkage block 442 to move synchronously through the cooperation of the linkage rod 444 and the second limiting sleeve 445. At this time, the telescopic spring rod 443 is stretched.

[0066] Furthermore, the linkage block 442 can adjust the tightness of the belt 43 in real time through the linkage rod 444, the telescopic spring rod 443 and the third pulley 446, ensuring that the belt 43 can smoothly drive the first pulley 41, the second pulley 42 and the third pulley 446 to transmit power. Among them, the telescopic spring rod 443 can perform real-time tension compensation on the belt 43, and the telescopic rod 447 can ensure that when the first limiting sleeve 441 moves in the vertical direction, it drives the second limiting sleeve 445 to move synchronously, thereby ensuring that the first pulley 41, the second pulley 42 and the third pulley 446 are always on the same vertical plane, ensuring the transmission effect between the belt 43, the first pulley 41, the second pulley 42 and the third pulley 446.

[0067] Therefore, during the displacement of the moving block 311, the linkage block 442 and the telescopic spring rod 443 cooperate with each other to perform dynamic position compensation on the moving block 311. The axial distance between the first pulley 41 and the second pulley 42 changes, thereby adjusting the wrap angle and the contact arc length of the belt 43 between the two pulleys.

[0068] Embodiment 2: Based on Embodiment 1, the flow rate of the inert gas corresponding to each annular baffle 51 is different. Therefore, when the corresponding annular baffle 51 moves to a specified position, the flow rate of the inert gas needs to correspond to the annular baffle 51. That is, the faster the flow rate of the inert gas, the smaller and lighter the particles splashed by the molten metal; conversely, the larger.

[0069] Therefore, when ensuring that the rotation speed of the spray pipe 4 and the centrifugal radius of the molten metal droplets are the same, the greater the mass of the molten metal droplets, the greater the centrifugal force, and thus the greater the impact force when colliding with the annular baffle 51. The impact kinetic energy of the molten metal droplets increases, the molten metal droplets are broken more fully, and the particle size of the metal powder is significantly reduced.

[0070] Furthermore, metal powders with different particle sizes can be obtained by changing the weight of the molten metal droplets.

[0071] Embodiment 3: Based on Embodiment 1, when ensuring that the centrifugal radius of the molten metal droplets and the molten metal droplets are the same, the greater the rotation speed of the spray pipe 4, that is, the linear velocity of the molten metal droplets, the greater the centrifugal force, and thus the greater the impact force when colliding with the annular baffle 51. The impact kinetic energy of the molten metal droplets increases, the molten metal droplets are broken more fully, and the particle size of the metal powder is significantly reduced.

[0072] Furthermore, metal powders with different particle sizes can also be obtained by changing the linear velocity of the molten metal droplets.

[0073] Finally, referring to Figure 9 , the present invention also provides a gas atomization powder making method for an iron-silicon-aluminum magnetic powder alloy, including the following steps: S1: Pretreatment, determine the diameter of the required metal powder, and push the corresponding annular baffle 51 upward. The annular baffle 51 and the powder making box 3 form a powder making space.

[0074] S2: Feeding treatment, pour the molten metal solution into the interior of the spray pipe 4. The spray pipe 4 rotates at this time, and then inert gas is introduced into the interior of the spray pipe 4.

[0075] S3: Powder making process. The spray pipe 4 rotates to discharge the molten metal solution in granular form into the powder making space. The metal liquid collides with the annular baffle 51 in the powder making space to generate smaller droplets, and the metal powder is obtained after the droplets are cooled. During the powder making process, the moving block 311 is pushed to move. When the moving block 311 moves, it drives the cleaning roller 313 to move to the side where the corresponding annular baffle 51 contacts the metal droplets. At this time, the circumference of the cleaning roller 313 abuts against the annular baffle. During the rotation of the annular baffle 51, it cooperates with the self-rotating cleaning roller 313. The self-rotating cleaning roller 313 can effectively clean the metal powder adhered to the annular baffle 51 during the rotation process.

[0076] S4: Collection process. The cooled metal powder falls through the bottom opening of the powder making box 3 into the inside of the collection frame 11.

[0077] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed invention.

[0078] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An air atomization powder making device for an iron-silicon-aluminum magnetic powder alloy, comprising a horizontal frame, characterized in that: On the horizontal frame, there are symmetrically arranged support frames along its length direction. Between the two support frames, there is jointly installed a powder-making box with an opening facing the horizontal frame and having a funnel-shaped structure. At the top of the powder-making box, there is a spray pipe for spraying liquid metal rotatably installed through a bearing. On the powder-making box, there is a collection mechanism, including: A plurality of annular baffles, which are arranged in a multi-layer concentric ring structure with decreasing diameters, are co-centered with the powder-making box and are slidably arranged through the powder-making box bottom along the depth direction of the powder-making box.

2. The gas atomization powder making device for an iron-silicon-aluminum magnetic powder alloy according to claim 1, wherein: The collection mechanism further includes: A plurality of lifting cylinders, which are arranged in one-to-one correspondence with the annular baffles. Each group of lifting cylinders is symmetrically distributed along the length direction of the horizontal frame and is used to change the height of the annular baffle; Support rods, which are installed on the horizontal frame and are in one-to-one correspondence with the lifting cylinders. One end of the support rod far from the horizontal frame is installed at the bottom of the powder-making box and is used to support the bottom part of the powder-making box separated by the annular baffle.

3. The gas atomization powder making device for an iron-silicon-aluminum magnetic powder alloy according to claim 1, wherein: On the powder-making box, there is also installed a cleaning member for scraping the metal powder adhered to the annular baffle, including: A moving block, which is arranged on the top of the powder-making box and moves along the length direction of the horizontal frame while moving along the height direction of the powder-making box; A through groove, which is opened on the top of the powder-making box and is matched with the moving block; A cleaning roller, which is rotatably arranged through the moving block. One end of the cleaning roller far from the moving block passes through the through groove and is arranged inside the powder-making box.

4. The gas atomization powder making device for an iron-silicon-aluminum magnetic powder alloy according to claim 3, characterized in that: On both sides of the through groove at the top of the powder-making box, there are installed guiding plates matched with the moving block for lifting the height of the moving block.

5. The gas atomization powder making device for an iron-silicon-aluminum magnetic powder alloy according to claim 3, characterized in that: A pulley one and a pulley two are respectively installed on the shaft heads of the spray pipe and the cleaning roller. A belt is jointly installed on the pulley one and the pulley two. On the powder-making box, there is also installed a compensation part for adjusting the real-time tightness of the belt.

6. The gas atomization powder making device for an iron-silicon-aluminum magnetic powder alloy according to claim 5, wherein: The compensation part includes: A limiting sleeve one, which is arranged on the spray pipe in a limiting and sliding manner and slides along the height direction of the spray pipe, and the pulley one is installed on the limiting sleeve one; A linkage block, which is slidably arranged on the top of the powder-making box. There is a fixed protrusion on the top of the powder-making box. Between the fixed protrusion and the linkage block, there is jointly installed a telescopic spring rod for resetting the linkage block. The top of the linkage block is rotatably installed with a linkage rod through a bearing; A limiting sleeve two, which is arranged on the linkage rod in a limiting and sliding manner, and a pulley three is installed on the limiting sleeve two, and the belt is installed on the pulley three.

7. The gas atomization powder making device for an iron-silicon-aluminum magnetic powder alloy according to claim 6, characterized in that: A telescopic plate is installed on the moving block. The telescopic end of the telescopic plate is installed on the limiting sleeve one. One end of the telescopic rod far from the limiting sleeve one is installed on the limiting sleeve two through a bearing.

8. The gas atomization powder making device for an iron-silicon-aluminum magnetic powder alloy according to claim 2, characterized in that: In the middle of the horizontal frame, there is a collection frame for collecting metal powder. On the horizontal frame, there are a plurality of annular tracks corresponding to each group of lifting cylinders. Inside the annular track, there is a sliding block, and each group of lifting cylinders is installed on the sliding block inside the corresponding annular track.

9. The gas atomization powder making device for an iron-silicon-aluminum magnetic powder alloy according to claim 1, characterized in that: An annular groove is opened inside the annular baffle, and two circular holes communicating with the annular groove are opened at the bottom of the annular baffle.

10. A gas atomization powder making method for an iron-silicon-aluminum magnetic powder alloy, comprising a gas atomization powder making device for an iron-silicon-aluminum magnetic powder alloy according to any one of claims 1-9, characterized in that, Its usage method includes the following steps: S1: Pretreatment, determine the diameter of the required metal powder, and push up the corresponding annular baffle. The annular baffle and the powder-making box form a powder-making space; S2: Feeding treatment, pour the molten metal solution into the spray pipe. At this time, rotate the spray pipe, and the spray pipe sprays the metal solution in the form of a spray into the powder-making space through inert gas; S3: Powder making process, the metal solution sprayed into the powder making space is cooled to form metal powder; S4: Collection process, the cooled metal powder falls into the interior of the collection frame through the opening at the bottom of the powder making box.

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