CN213287634U - A screening plant for sintering neodymium iron boron magnetic - Google Patents
A screening plant for sintering neodymium iron boron magnetic Download PDFInfo
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- CN213287634U CN213287634U CN202022093466.4U CN202022093466U CN213287634U CN 213287634 U CN213287634 U CN 213287634U CN 202022093466 U CN202022093466 U CN 202022093466U CN 213287634 U CN213287634 U CN 213287634U
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Abstract
The utility model discloses a screening plant for sintering neodymium iron boron magnetic powder, which relates to the field of powder screening equipment and comprises a feeding chamber and a screening machine body; the screening machine is characterized in that a screen is arranged in the screening machine body, the screen divides the interior of the screening machine body into a primary screening chamber and a secondary screening chamber which are arranged left and right, and the feeding chamber is positioned above the primary screening chamber; a first air blower for blowing air to the screen is further installed on the screening machine body, and a permanent magnet is further installed on one side, far away from the screen, of the inner wall of the secondary screening chamber; and the screening machine body is also provided with a vibrating device for shaking the screen. The utility model discloses when having promoted screening speed, reduced by the recovery degree of difficulty of oxidation neodymium iron boron magnetic, increased the automation and the intellectuality of system, reduced the cost of labor.
Description
Technical Field
The utility model relates to a powder screening installation field particularly, relates to a screening plant for sintering neodymium iron boron magnetic.
Background
At present, the sintered nd-fe-b permanent magnet material is manufactured by a powder metallurgy process, the sintered nd-fe-b after smelting is made into powder through a series of processes, the powder is pressed into a pressed blank in a magnetic field, the pressed blank is sintered in inert gas or vacuum after isostatic pressing to achieve densification, in order to improve the coercive force of the magnet, aging heat treatment is usually required, and the sintered nd-fe-b blank body after preparation needs to be subjected to machining, electroplating and other steps at the later stage.
The sintered Nd-Fe-B powder is prepared by crushing a large alloy ingot into powder with a certain size, and the latest powder preparation process is to prepare the Nd-Fe-B melt-spun sheet into powder through hydrogen crushing and airflow milling. In order to obtain a well-oriented magnet, it is required that the powder particles have a small size (3 to 4 μm) and a concentrated size distribution, and the powder particles are spherical or nearly spherical.
At present, the most common method is to use a screen to screen out some powder with too large particle size and part of the powder which has spontaneous combustion, thereby ensuring that the particle size distribution of the powder is relatively uniform. However, the existing screening machine body is used for screening the sintered neodymium iron boron magnetic powder mostly in modes of vibration, airflow impact and the like, so that not only is the screened powder particles difficult to recover, but also people are required to watch in real time during screening operation, and the filter screen is replaced regularly, so that the labor cost of the step is greatly increased.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a screening plant for sintering neodymium iron boron magnetic has when having promoted screening speed, has reduced by the recovery degree of difficulty of oxidation neodymium iron boron magnetic, has increased the automation and the intellectuality of system, has reduced the cost of labor.
For realizing the purpose of the utility model, the technical proposal adopted is that: a screening device for sintering neodymium iron boron magnetic powder comprises a feeding chamber and a screening machine body; the screening machine is characterized in that a screen is arranged in the screening machine body, the screen divides the interior of the screening machine body into a primary screening chamber and a secondary screening chamber which are arranged left and right, and the feeding chamber is positioned above the primary screening chamber; a first air blower for blowing air to the screen is further installed on the screening machine body, and a permanent magnet is further installed on one side, far away from the screen, of the inner wall of the secondary screening chamber; and the screening machine body is also provided with a vibrating device for shaking the screen.
Further, the screening machine body is internally provided with a fixed frame, the number of the screen meshes is two, and the two screen meshes are respectively arranged on the upper side and the lower side of the fixed frame.
Furthermore, the number of the vibrating devices is two, and the two vibrating devices are both arranged on the fixed frame.
Furthermore, a second air blower for vertically blowing air into the secondary screening chamber is also arranged on the screening machine body.
Further, the first blower and the second blower are both centrifugal blowers.
Further, the first air blower is a plurality of, and a plurality of first air blowers are evenly arranged on one side of the primary screening chamber far away from the screen cloth.
Furthermore, a stirring device is further installed in the feeding chamber and is positioned right above an outlet of the feeding chamber.
Further, the stirring device is an open turbine type stirrer.
Furthermore, the permanent magnets are multiple and are uniformly arranged on one surface, far away from the screen, of the secondary screening chamber.
Furthermore, the bottoms of the primary screening chamber and the secondary screening chamber are provided with material collecting hoppers.
Furthermore, the device also comprises a vacuum system for vacuumizing the feeding chamber and the screening machine body.
The utility model has the advantages that,
the utility model discloses when screening sintered neodymium iron boron magnetic, the indoor sintered neodymium iron boron magnetic of pan feeding drops perpendicularly in one-level screening, effect through first air-blower, the sintered neodymium iron boron magnetic that the volume is greater than screen hole or because of the oxidation produces the cluster then can not enter into the second grade screening through the screen cloth in the screen cloth, and the sintered neodymium iron boron magnetic or magnetism that the volume is less than screen hole are greater than and pass the screen cloth through the absorption of permanent magnet then and enter into the second grade screening indoor, with this screening to the sintered neodymium iron boron magnetic of realization.
The utility model discloses the cluster takes place for the powder after make full use of oxidation makes its volume be greater than not the characteristics of the sintering neodymium iron boron magnetic powder of oxidation and the sintering neodymium iron boron magnetic powder magnetism that is oxidized be less than not the sintering neodymium iron boron magnetic powder magnetism of oxidation to utilize air-blower, permanent magnet and vibrating device, effectively promoted screening speed, reduced the recovery degree of difficulty by the oxidation neodymium iron boron magnetic powder, increased the automation of system, reduced the cost of labor.
Drawings
Fig. 1 is a structural diagram of a screening device for sintering neodymium iron boron magnetic powder provided by the present invention;
fig. 2 is a diagram of a vacuum system in the present invention;
fig. 3 is a diagram of the control system of the present invention.
Reference numbers and corresponding part names in the drawings:
1. a feeding chamber 11, a charging bucket 12 and a stirring device;
2. the screening machine comprises a screening machine body 21, a screen, 22, a first air blower, 23, a second air blower, 24, a permanent magnet, 25, a vibration device, 26, a fixing frame, 27, a primary screening chamber, 28, a secondary screening chamber, 29 and a collecting hopper;
3. a collection tank;
4. a vacuum system;
5. and (5) controlling the system.
Detailed Description
The present invention will be described in further detail below with reference to specific embodiments and with reference to the accompanying drawings.
As shown in fig. 1, fig. 2, fig. 3, the utility model provides a pair of a screening plant for sintering neodymium iron boron magnetic, including feeding chamber 1 and screening organism 2, feeding chamber 1 is used for sending into sintering neodymium iron boron magnetic and sieves the organism 2 in, is used for sieving sintering neodymium iron boron magnetic in the screening organism 2. The screening machine body 2 is internally provided with a screen 21, the screen 21 is used for screening the sintered neodymium iron boron magnetic powder fed into the screening machine body 2, the screen 21 divides the inside of the screening machine body 2 into a primary screening chamber 27 and a secondary screening chamber 28 which are arranged left and right, the primary screening chamber 27 and the secondary screening chamber 28 are equal in size, and the feeding chamber 1 is positioned above the primary screening chamber 27, so that the sintered neodymium iron boron magnetic powder in the feeding chamber 1 vertically enters the primary screening chamber 27 through self weight after being discharged and vertically moves downwards along the primary screening chamber 27; still install the first air-blower 22 to the screen cloth 21 air-blast on the screening organism 2, the perpendicular screen cloth 21 of wind direction that first air-blower 22 bloied promptly and the sintering neodymium iron boron magnetic powder that enters into in the primary sifting chamber 27, make the wind that first air-blower 22 blew out directly use sintering neodymium iron boron magnetic powder, and blow sintering neodymium iron boron magnetic powder to screen cloth 21, make sintering neodymium iron boron magnetic powder enter into and sieve on the screen cloth 21, at this moment, the volume is greater than the sintering neodymium iron boron magnetic powder in screen cloth 21 hole or because of the sintering neodymium iron boron magnetic powder that the oxidation produced the cluster then can not enter into secondary sifting chamber 28 through screen cloth 21, and the sintering neodymium iron boron magnetic powder that the volume is less than screen cloth 21 hole or magnetism is greater than the sintering neodymium iron boron magnetic powder that is oxidized then enters into secondary sifting chamber 28 through screen cloth 21.
The one side that screen cloth 21 was kept away from to second grade screening room 28 inner wall still installs permanent magnet 24, because sintering neodymium iron boron magnetic that does not oxidize is greater than the sintering neodymium iron boron magnetic that is oxidized magnetism, through permanent magnet adsorption, makes the smooth screen cloth that sees through of sintering neodymium iron boron magnetic that does not oxidize to give the smooth screen cloth that passes of sintering neodymium iron boron magnetic that will not oxidize, make the screening effect of sintering neodymium iron boron magnetic better.
The vibrating device 25 of shaking screen cloth 21 is still installed to screening organism 2, vibrating device 25 not only can drive screen cloth 21 vibrations, and can effectively drive screening organism 2 vibrations, make the sintering neodymium iron boron magnetic powder that adsorbs on 2 inner walls of screening organism not oxidized or adsorb on screen cloth 21 and produce the cluster by the oxidation back can drop downwards through the shake, not only make screen cloth 21 realize automatic clearance, and make the convenience be less than the sintering neodymium iron boron magnetic powder in screen cloth hole or magnetism and be greater than the sintering neodymium iron boron magnetic powder that is oxidized and can drop downwards through vibrating device's shake and carry out the automatic collection to the volume that sieves out.
When the sintered neodymium iron boron magnetic powder needs to be sieved, the sintered neodymium iron boron magnetic powder is sent into the material inlet chamber 1 and sent into the primary sieving chamber 27 through the material inlet chamber 1, the sintered neodymium iron boron magnetic powder entering the primary sieving chamber 27 moves towards the screen 21 under the action of the first air blower 22, at the moment, the sintered neodymium iron boron magnetic powder with the volume larger than the pores of the screen 21 or the sintered neodymium iron boron magnetic powder with clusters generated by oxidation cannot enter the secondary sieving chamber 28 through the screen 21, the sintered neodymium iron boron magnetic powder with the volume smaller than the pores of the screen 21 or the sintered neodymium iron boron magnetic powder with the magnetism larger than the oxidized state enters the secondary sieving chamber 28 through the screen 21, and the sieved sintered neodymium iron boron magnetic powder with the volume smaller than the pores of the screen 21 or the sintered neodymium iron boron magnetic powder with the magnetism larger than the oxidized state is sent out from the secondary sieving chamber 28 through the shaking of the vibrating device, and because of the cluster make the volume be greater than the sintering neodymium iron boron magnetic powder in screen cloth 21 hole and the sintering neodymium iron boron magnetic powder that is oxidized then send out in the first order screening room 27 through the dead weight is automatic, and because of the oxidation produces cluster or magnetic sintering neodymium iron boron magnetic powder and adsorbs on screen cloth 21 or 2 inner walls of screening organism, through the vibration of vibrating device 25, make the cluster or magnetic sintering neodymium iron boron magnetic powder that adsorbs on screen cloth 21 or 2 inner walls of screening organism then automatic drop downwards and send out in the first order screening room 27.
A fixing frame 26 is installed in the screening machine body 2, the fixing frame 26 is welded and fixed on the inner wall of the screening machine body 2, and the fixing frame 26 extends along the width direction of the screening machine body 2; the screen cloth 21 is two, and two screen cloth 21 size equals, and two screen cloth 21 install respectively in the upper and lower both sides of mount 26, makes screen cloth 21's installation convenient more, firm.
Vibrating device 25 is two, and two vibrating device 25 are all installed on mount 26, make vibrating device 25 and two screen cloth 21 distances closer, make vibrating device 25 use the vibrational force on screen cloth 21 bigger to can make the sintering neodymium iron boron magnetic that adsorbs on screen cloth 21 can fall down through screen cloth 21's vibration is whole, thereby realize the clearance to screen cloth 21, effectively prevent to cause the jam to screen cloth 21, make the screening effect of sintering neodymium iron boron magnetic obtain guaranteeing. The screen 21 is a metal screen 21, and the aperture of the screen 21 should be 5 μm to 10 μm, and the corresponding mesh number should be 160 to 3200.
The vibration device 25 is directly used by the existing vibration motor, the vibration motor is directly fixed on the fixing frame 26 through a screw, the minimum frequency of the vibration device 25 is less than 10Hz, the maximum frequency of the vibration device 25 is greater than 100Hz, the minimum displacement of the vibration of the air vibration device 25 along the Z-axis direction is smaller than 1mm, and the maximum displacement is greater than 5 mm.
The second air-blower 23 to the vertical blast air in the second grade screening room 28 is still installed on screening organism 2, the wind direction that second air-blower 23 blew out extends along the vertical direction of second screening room, make the volume that sieves out through screen cloth 21 be less than the sintered neodymium iron boron magnetic powder in screen cloth 21 hole or magnetism be greater than the sintered neodymium iron boron magnetic powder who is oxidized and enter into back in the second grade screening room 28 again, effect through second air-blower 23, make the volume that sieves out be less than the sintered neodymium iron boron magnetic powder in screen cloth 21 hole or magnetism be greater than the sintered neodymium iron boron magnetic powder that is oxidized and can remove to the bottom of second grade screening room 28 through sweeping, thereby the convenient sintered neodymium iron boron magnetic powder that is less than in screen cloth 21 hole or magnetism is greater than the oxidized neodymium iron boron magnetic powder that is sieved to the.
The first blower 22 and the second blower 23 are both centrifugal blowers. First air-blower 22 is a plurality of, and a plurality of first air-blowers 22 evenly arrange one side of keeping away from screen cloth 21 in one-level screening room 27, make the cross section homoenergetic of one-level screening room 27 receive the wind of first air-blower 22 effect, make the sintered neodymium iron boron magnetic homoenergetic that enters into in one-level screening room 27 blow screen cloth 21 on, make the sintered neodymium iron boron magnetic homoenergetic that enters into in one-level screening room 27 sieve through screen cloth 21, make the screening effect of sintered neodymium iron boron magnetic better.
Still install agitating unit 12 in the income material room 1, and agitating unit 12 is located the export of income material room 1 directly over, agitating unit 12 can not only stir the sintering neodymium iron boron magnetic of sending into in the income material room 1, can not only effectively break up the sintering neodymium iron boron magnetic of caking, can also make sintering neodymium iron boron magnetic dispersion even, make sintering neodymium iron boron magnetic can divide the form to enter into one-level screening room 27 in, make first air-blower 22 can blow sintering neodymium iron boron magnetic whole when the effect and sieve on screen cloth 21, the screening effect that makes sintering neodymium iron boron magnetic is better. Agitating unit 12 makes the stirring power bigger for opening turbine formula agitator, makes sintered neodymium iron boron magnetic stirring more even.
The permanent magnets 24 are uniformly arranged on one surface of the secondary screening chamber 28 far away from the screen 21, so that the adsorbability of the screen 21 and the screening machine body 2 is ensured; the specific number of permanent magnets 24 can be adjusted as appropriate.
The bottom of one-level screening room 27 and second grade screening room 28 all is provided with collecting hopper 29, and collecting hopper 29 is hourglass hopper-shaped, and collecting hopper 29 mainly used collects the discharge to the sintered neodymium iron boron magnetic that sieves out is concentrated, and in the in-service use in-process, collection tank 3 after two collecting hopper 29 lower extremes are all installed, and for the convenience of the control to two collecting hopper 29, still can be at the exit installation ooff valve of collecting hopper 29, avoids the direct discharge of sintered neodymium iron boron magnetic under the condition that collection tank 3 is not installed in 29 exits of collecting hopper.
The utility model discloses still include the vacuum system 4 to the inside evacuation of feeding chamber 1 and screening organism 2, it is concrete, vacuum system 4 includes vacuum pump and two vacuum pipe, and the one end of two vacuum pipe is parallelly connected to be installed on the vacuum pump, and the other end of two vacuum pipe communicates with feeding chamber 1 inside, screening organism 2 inside respectively, makes the vacuum pump make feeding chamber 1 and screening organism 2 in the during operation keep vacuum state simultaneously. In order to make the vacuum effect in the pan feeding room 1 better, can set the 1 top in pan feeding room to the closed condition to directly send into pan feeding room 1 with the sintered neodymium iron boron of previous process through the pipeline, make the sintered neodymium iron boron broken in-process completely isolated with external.
When the sintered neodymium iron boron magnetic powder needs to be screened, firstly, two collecting tanks 3 are respectively installed on two collecting hoppers 29, a vacuum pump in a vacuum system 4 is started, the vacuum pump vacuumizes the feeding chamber 1 and the screening machine body 2 to enable the feeding chamber 1, the primary screening chamber 27 and the secondary screening chamber 28 to be in a vacuum state, a material pipe for storing the sintered neodymium iron boron magnetic powder is connected with an inlet of the feeding chamber 1, a stirring device 12, a first air blower 22, a second air blower 23 and a vibrating device 25 are started, the sintered neodymium iron boron magnetic powder entering the feeding chamber 1 is stirred through the stirring device 12 to enable the sintered neodymium iron boron magnetic powder to be uniformly dispersed, the uniformly dispersed sintered neodymium iron boron magnetic powder is sent into the primary screening chamber 27 through an outlet of the feeding chamber 1, the sintered neodymium iron boron magnetic powder moves towards the screen 21 under the action of the first air blower 22, and at the moment, the sintered neodymium iron boron magnetic powder with the volume larger than the pores of the screen 21 or the sintered neodymium iron boron magnetic powder generated by Can not enter the secondary screening chamber 28 through the screen 21, so that the waste water can be adsorbed on the inner wall of the screen 21 or the primary screening chamber 27 or automatically fall down, and the sintered ndfeb magnetic powder adsorbed on the inner wall of the screen 21 or the primary sieving chamber 27 and clustered by oxidation is sent into the collection tank 3 from the collection hopper 29 at the lower end of the primary sieving chamber 27 by the vibration of the vibration device 25, the sintered neodymium iron boron magnetic powder with the volume smaller than the pores of the screen 21 or the sintered neodymium iron boron magnetic powder with the magnetism larger than the oxidized sintered neodymium iron boron magnetic powder enters the secondary screening chamber 28 through the screen 21, under the action of the second blower 23, the sintered neodymium iron boron magnetic powder with the volume smaller than the pores of the screen 21 or the sintered neodymium iron boron magnetic powder with the magnetism larger than the oxidized part entering the secondary screening chamber 28 moves downwards through blowing and shaking, and is sent into the collection tank 3 through the collection hopper 29 at the lower end of the secondary screening chamber 28.
For improving the utility model discloses an degree of automation, the utility model discloses still can set control system 5 to make vacuum pump, agitating unit 12, first air-blower 22, second air-blower 23, vibrating device 25 and be located the switch valve in collecting hopper 29 exit etc. go up the relay all with control system 5 electricity be connected, make control system 5 come control vacuum pump, agitating unit 12, first air-blower 22, second air-blower 23, vibrating device 25 and be located the switch of the switch valve in collecting hopper 29 exit.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A screening device for sintering neodymium iron boron magnetic powder is characterized by comprising a feeding chamber (1) and a screening machine body (2); a screen (21) is installed in the screening machine body (2), the screen (21) divides the interior of the screening machine body (2) into a primary screening chamber (27) and a secondary screening chamber (28) which are arranged left and right, and the feeding chamber (1) is positioned above the primary screening chamber (27); a first air blower (22) for blowing air to the screen (21) is further installed on the screening machine body (2), and a permanent magnet (24) is further installed on one side, away from the screen (21), of the inner wall of the secondary screening chamber (28); and a vibrating device (25) for shaking the screen (21) is also arranged on the screening machine body (2).
2. A screening device for sintered neodymium iron boron magnetic powder according to claim 1, characterized in that, the screening machine body (2) is internally provided with a fixing frame (26), and the number of the screens (21) is two, and the two screens (21) are respectively arranged at the upper side and the lower side of the fixing frame (26).
3. A screening device for sintered neodymium iron boron magnetic powder according to claim 2, characterized in that, the number of the vibrating devices (25) is two, and the two vibrating devices (25) are both installed on the fixing frame (26).
4. A screening device for sintered neodymium iron boron magnetic powder according to claim 1, characterized in that a second blower (23) blowing air vertically into the secondary screening chamber (28) is further installed on the screening machine body (2).
5. The screening device for the sintered neodymium iron boron magnetic powder according to claim 1, wherein the number of the first air blowers (22) is multiple, and the multiple first air blowers (22) are uniformly arranged on one side of the primary screening chamber (27) far away from the screen (21).
6. A screening device for sintered neodymium iron boron magnetic powder according to claim 1, characterized in that stirring device (12) is further installed in the feeding chamber (1), and the stirring device (12) is located right above the outlet of the feeding chamber (1).
7. A screening device for sintered neodymium iron boron magnetic powder according to claim 6, characterized in that, agitating unit (12) is an open turbine type agitator.
8. A screening device for sintered neodymium iron boron magnetic powder according to claim 1, characterized in that, the permanent magnet (24) is a plurality of, and a plurality of permanent magnets (24) are evenly arranged on one side of the secondary screening chamber (28) far away from the screen (21).
9. A screening device for sintered neodymium iron boron magnetic powder according to claim 1, characterized in that the bottoms of the primary screening chamber (27) and the secondary screening chamber (28) are provided with collecting hoppers (29).
10. A screening device for sintered nd-fe-b magnetic powder according to any one of claims 1 to 9, characterized by further comprising a vacuum system (4) for evacuating the interior of the feeding chamber (1) and the screening machine body (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022093466.4U CN213287634U (en) | 2020-09-22 | 2020-09-22 | A screening plant for sintering neodymium iron boron magnetic |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022093466.4U CN213287634U (en) | 2020-09-22 | 2020-09-22 | A screening plant for sintering neodymium iron boron magnetic |
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| CN213287634U true CN213287634U (en) | 2021-05-28 |
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| CN202022093466.4U Active CN213287634U (en) | 2020-09-22 | 2020-09-22 | A screening plant for sintering neodymium iron boron magnetic |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116273453A (en) * | 2023-02-16 | 2023-06-23 | 江苏普隆磁电有限公司 | Automatic sieving mechanism of neodymium iron boron magnetic powder |
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2020
- 2020-09-22 CN CN202022093466.4U patent/CN213287634U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116273453A (en) * | 2023-02-16 | 2023-06-23 | 江苏普隆磁电有限公司 | Automatic sieving mechanism of neodymium iron boron magnetic powder |
| CN116273453B (en) * | 2023-02-16 | 2024-04-26 | 江苏普隆磁电有限公司 | Automatic sieving mechanism of neodymium iron boron magnetic powder |
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