JP2013106005A - Magnet manufacturing apparatus and magnet manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnet manufacturing apparatus and a magnet manufacturing method capable of removing the aggregate in slurry while ensuring easy transportation of the slurry.SOLUTION: A magnet manufacturing apparatus 1 is provided, between a crusher 2 and a stop tank 5 with a first filter, with a filter device 8 for separating the aggregate in slurry by a filter. The filter device 8 fluidizes the crush fluid in the slurry with a fluid supplied from a fluid supply section 9, and a filter 14 having a plurality of filter holes 7 extending in a direction orthogonal to the transportation direction A1 of the slurry separates the aggregate in the slurry.

Description

  The present invention relates to a magnet manufacturing apparatus and a magnet manufacturing method for forming a magnet in a slurry state.

  Conventionally, for example, a mixture of raw materials such as iron oxide and strontium carbonate mixed at a predetermined mixing ratio is calcined to be ferritized, and the obtained sintered body is pulverized, and this powder is compression-molded in a magnetic field. A magnet manufacturing apparatus for manufacturing a ferrite magnet is well known (see Patent Document 1, etc.). In this type of magnet manufacturing apparatus, there is a wet type in which a material is formed into a slurry in the process of successful magnetic field (see Patent Document 2).

  In the case of the wet type, there is a possibility that aggregates are mixed in the slurry during the slurry transfer, and if ferrite forming is performed with the aggregates mixed in the slurry, this may lead to grain boundary destruction. Aggregates are composed of strontium, calcium, and the like, and are mainly formed by adhering to the inner surface of the pipe of the slurry transfer path and then drying off. Therefore, a general magnet manufacturing apparatus is provided with a tank filter in front of a stock tank that temporarily stores slurry on the slurry transfer path, and measures are taken to remove aggregates by this tank filter.

Japanese Patent No. 4278098 Japanese Examined Patent Publication No. 46-17118

  By the way, when the filter holes (mesh) of the tank filter are aligned in the same direction as the slurry transfer direction, the filter resistance increases when the filter hole is made small in order to secure the agglomerate removal rate, The slurry cannot be easily transferred. In addition, clogging occurs immediately, leading to damage to the filter. On the contrary, when the filter hole is enlarged, the removal rate of the aggregates is deteriorated. For this reason, there has been a need for development of a new technique capable of achieving both a high removal rate of aggregates in the slurry and easy transfer of the slurry.

  The objective of this invention is providing the magnet manufacturing apparatus and magnet manufacturing method which can remove the aggregate in a slurry, ensuring the ease of transfer of a slurry.

  In order to solve the above problems, in the present invention, a calcined body obtained by calcining a magnet material is pulverized, and the pulverized particles are dispersed in a dispersion medium to form a slurry, and this slurry is being transferred. In a magnet manufacturing apparatus that manufactures a magnet by removing aggregates by passing through a filter member, and dehydrating and molding the slurry, a fluid having a specific gravity smaller than that of the pulverized particles provided during the slurry transfer. And a separator for separating the aggregates from the slurry in a direction crossing the direction of slurry transfer.

  According to the configuration of the present invention, the pulverized particles in the slurry are fluidized with a fluid having a specific gravity smaller than that of the pulverized particles, and pulverized particles having a large particle diameter (for example, aggregates) from the slurry in a direction crossing the slurry transfer direction. ). For this reason, in the case of the present invention, since the pulverized particles having a large particle size in the slurry are separated in a direction different from the direction in which the slurry is transferred, it is difficult to apply a load for transferring the slurry to the separator. It becomes possible to separate the pulverized particles having a particle size. Therefore, it is possible to achieve both the ease of transferring the slurry and the high removal rate of the aggregates in the slurry.

  The gist of the present invention is that the separation device includes a filter device that separates agglomerates in the slurry by a filter portion having a plurality of filter holes extending in a direction intersecting the slurry transfer direction. According to this configuration, the pulverized particles in the slurry are separated from the pulverized particles in the slurry by the filter unit having the filter holes extending in the direction intersecting with the transfer direction of the slurry. For this reason, even if the opening diameter of the filter hole is reduced to aim at a high removal rate of aggregates, it is difficult to cause a situation where the pulverized particles collide vigorously. Is less likely to occur. Accordingly, it is possible to ensure both ease of slurry transfer and secure a high removal rate of aggregates in the slurry.

  The gist of the present invention is that the filter device can promote the separation of the pulverized particles in the slurry by vibration. According to this configuration, since vibration is applied to the filter device, fluidization of the pulverized particles in the fluid is promoted. Therefore, since the aggregate is easily separated from the slurry, the effect of improving the aggregate removal rate is enhanced.

  In the present invention, the separation device separates the aggregates in the slurry by scattering the slurry by the valve member, dropping the slurry having a small particle size toward the front, and flying the slurry having a large particle size far away. The gist is that a slurry scattering device is provided. According to this configuration, it is possible to separate the aggregates in the slurry without using a filter. Therefore, the separation method of the aggregate is not limited to the filter method, and the aggregate can be removed even by the slurry scattering method as in this configuration.

The gist of the present invention is that the valve member is an electromagnetic valve. According to this configuration, it is possible to efficiently separate the aggregates from the slurry by controlling the electromagnetic valve.
The gist of the present invention is that a pulverizing apparatus for pulverizing the slurry having a high concentration by the dehydration is provided in the previous stage of the molding. According to this configuration, since the slurry concentration is high immediately before molding of the magnet, if the slurry is pulverized before the molding, the pulverized particles can be further refined.

  In the present invention, the calcined body obtained by calcining the magnet material is pulverized, and the pulverized particles are dispersed in a dispersion medium to form a slurry, and the slurry is passed through a filter member in the middle of transfer to form an aggregate. In the magnet manufacturing method for producing a magnet by removing and dehydrating and molding the slurry, the pulverized particles are fluidized with a fluid having a specific gravity smaller than this by a separator provided in the middle of the slurry transfer, The gist is to separate agglomerates from the slurry in a direction crossing the direction of slurry transfer.

  According to the present invention, it is possible to remove aggregates in the slurry while ensuring ease of transfer of the slurry.

The block diagram of the magnet manufacturing apparatus of 1st Embodiment. The block diagram which shows the outline of a filter apparatus. The perspective view which shows the filter shape of a filter apparatus. The schematic diagram which shows the operation | movement aspect of a filter apparatus. The schematic diagram which shows another operation | movement aspect of a filter apparatus. The block diagram which shows the outline of the slurry scattering apparatus of 2nd Embodiment. The schematic diagram which shows the operation | movement aspect of a slurry scattering apparatus. Sectional drawing which shows the shape of the filter hole of another example.

(First embodiment)
Hereinafter, a first embodiment of a magnet manufacturing apparatus and a magnet manufacturing method embodying the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the magnet manufacturing apparatus 1 includes a pulverizer 2 that pulverizes a magnet material into a slurry, and an agglomerate separator 4 that separates agglomerates in the slurry transferred from the pulverizer 2. Is provided. In addition, the magnet manufacturing apparatus 1 includes a first filter-equipped stock tank 5 that stores the slurry that has passed through the aggregate separator 4, and a second filter-equipped stock that stores the slurry transferred from the first filter-equipped stock tank 5. A tank 6 is provided. The agglomerate separator 4 constitutes a separation device.

  When manufacturing a ferrite magnet, first, the material obtained by mixing magnet materials (raw materials) such as iron oxide and strontium carbonate at a predetermined mixing ratio is preliminarily calcined to make a ferrite magnet, and the resulting calcined ferrite body is pulverized. 2 As the raw material, for example, oxide powder or a compound that becomes an oxide by sintering, for example, powder of carbonate, hydroxide, sulfate or the like is used. The calcination is usually performed in an oxidizing atmosphere such as in the air.

  As the pulverizer 2, for example, a ball mill, a stamp mill, an attritor, an atomizer or the like is used. The pulverizer 2 converts the input ferrite calcined body into a calcined powder composed of submicron-sized ferrite particles through a coarse pulverization step and a fine pulverization step. In the case of this example, the coarse pulverization step is performed dry, and the fine pulverization step is performed wet. Then, after roughly pulverizing the calcined body in the coarse pulverization step until the particle size is less than or equal to a predetermined particle size, in the fine pulverization step, a slurry for pulverization including coarsely pulverized powder and water is prepared. Finely grind until The produced slurry is sent to the agglomerate separator 4. Water corresponds to the dispersion medium of the slurry.

  As shown in FIGS. 2 and 3, the agglomerate separator 4 of this example is a filter type that separates agglomerates (for example, strontium, calcium, etc.) from the slurry by filtering the slurry with a filter. In this case, the agglomerate separator 4 includes a filter device 8 having a plurality of filter holes 7 extending in a direction orthogonal to the slurry transfer direction (arrow A1 direction in FIG. 2), and a fluid (water ) To fluidize finely pulverized particles in the slurry. In addition, the fluid supply part 9 comprises a separation apparatus.

  The filter device 8 is provided with a pipe 10 connected to the pulverizer 2. As shown in FIG. 3, the pipe 10 includes a bottom wall 11 extending in the slurry transfer direction A <b> 1 and a pair of groove walls 12, 12 formed at both ends in the width direction of the bottom wall 11. A region surrounded by the walls 12 and 12 becomes a slurry flow path 13.

  As shown in FIGS. 2 and 3, the filter device 8 is provided with a filter portion 14 formed in a part of the bottom wall 11 of the pipe 10 and a storage portion 15 that receives the slurry filtered by the filter portion 14. ing. The aforementioned filter holes 7, 7... Are formed in the filter portion 14 and arranged in a lattice shape in the plane direction of the filter portion 14. The filter hole 7 of the present example has a small diameter of the round hole, so that a large particle size of the pulverized particles in the slurry (for example, a finely pulverized powder (magnet material) or agglomerate having a large particle size) , And only small pulverized particles (for example, fine pulverized powder and aggregates having a small particle size) can pass through.

As shown in FIG. 2, the filter device 8 is arranged so that the downstream side is inclined downward. For this reason, the slurry which flows through the flow path 13 is easy to flow to the downstream side (transfer direction A1).
Since the storage unit 15 receives the slurry filtered by the filter unit 14, the storage unit 15 stores the slurry containing only finely pulverized powder and aggregates having a small particle diameter. The storage unit 15 has a lower end corner connected to the first filter-equipped stock tank 5 via a pipe 16. Inside the reservoir 15, an air layer 17 is provided between the water surface of the slurry in the reservoir 15 and the filter portion 14, so that the slurry can easily fall down from the filter hole 7. The slurry stored in the storage unit 15 is transferred to the first filter-equipped stock tank 5 by, for example, a pump.

  The stock tank 5 with the first filter takes in the slurry transferred from the pipe 16 via the first tank pre-filter 18 and temporarily stores the slurry to absorb the time difference of the manufacturing cycle. The first tank front filter 18 is formed of, for example, a mesh material, and is provided outside the main body of the stock tank 5 with the first filter. Since the first tank pre-filter 18 is provided to separate the small particle size aggregates in the slurry, the filter hole diameter (opening diameter) is formed small. In the case of this example, the filter diameter of the first tank front filter 18 is formed smaller than the filter diameter of the filter device 8. In addition, the 1st tank front filter 18 comprises a filter member.

  As shown in FIG. 1, the stock tank 6 with the second filter is connected to the stock tank 5 with the first filter via a pipe 19. The stock tank 6 with the second filter takes in the slurry transferred from the pipe 19 via the second tank pre-tank filter 20 before the second tank, and temporarily stores the slurry to absorb the time difference of the manufacturing cycle. The second tank front filter 20 is formed of, for example, a mesh material, and is provided outside the main body of the stock tank 6 with the second filter. Since the second tank pre-filter 20 is provided to separate the small particle size aggregates in the slurry taken in via the first filter stock tank 5, the filter hole diameter (opening diameter) is formed small. . In the case of this example, the filter diameter of the second tank front filter 20 before the second tank is formed smaller than the filter diameter of the stock tank 5 with the first filter. In addition, the 2nd tank front filter 20 comprises a filter member.

  The fluid supply unit 9 promotes fluidization of the pulverized particles in the fluid by supplying the fluid to the pipe 10 and the aggregate separator 4 itself. That is, the pulverized particles are fluidized (suspended) with a fluid having a specific gravity smaller than that of the pulverized particles. The amount of fluid to be supplied (the amount of water) is set to such an amount that the pulverized particles can float in the slurry. In other words, the amount of pulverized particles in the fluid can be easily separated.

  The magnet manufacturing apparatus 1 includes a dehydrator 21 that dehydrates the slurry to a predetermined concentration, an injector 22 that feeds the dehydrated slurry to a subsequent stage, and a filter that removes impurities from the slurry sent from the injector 22. A machine 23 and a molding machine 24 for forming a magnet from the slurry after filtering are provided. As the dehydrator 21, for example, a filter press or a centrifuge is used. The injector 22 supplies the slurry after dehydration to the molding machine 24 through the filter unit 14 in an amount necessary for magnet molding. The molding machine 24 compresses and moldings the slurry taken in from the injection machine 22 in a magnetic field to orient the ferrite particles, thereby molding a ferrite magnet having a predetermined shape.

Next, the operation of the magnet manufacturing apparatus 1 of this example will be described with reference to FIG. 1, FIG. 2, FIG. 4 and FIG.
As shown in FIG. 1, in order to manufacture a ferrite magnet, first, a material obtained by mixing raw materials such as iron oxide and strontium carbonate in a predetermined mixing ratio is preliminarily fired. Subsequently, the obtained calcined ferrite body is put into the pulverizer 2. The pulverizer 2 pulverizes the ferrite calcined body to a submicron size and processes the calcined powder. At this time, the pulverizer 2 coarsely pulverizes the ferrite calcined body to a predetermined particle size, mixes the coarsely pulverized powder and water to prepare a slurry, and the slurry has a predetermined particle size. Finely pulverize.

  The slurry sent out from the pulverizer 2 is sent to the filter device 8 through the pipe 10 by the flow of the fluid supplied from the fluid supply unit 9. At this time, the pulverized particles in the slurry are fluidized (floated) by a fluid having a specific gravity smaller than that of the pulverized particles, and flow through the flow path 13 of the filter device 8.

  As shown in FIG. 2 and FIG. 4, the filter device 8 filters the agglomerates in the slurry through filter holes 7, 7... Extending in a direction orthogonal to the slurry transfer direction A <b> 1. Separate the crushed particles. In the case of this example, as shown in FIG. 4, the filter holes 7, 7... Extend in the direction perpendicular to the slurry transfer direction, so that the pulverized particles in the slurry do not collide with the filter holes 7 vigorously. The agglomerates in the slurry can be separated by the filter holes 7. Then, the finely pulverized powder and aggregates having a large particle size in the slurry remain on the upper surface of the filter portion 14, and the finely pulverized powder and aggregates having a small particle size pass through the filter hole 7 together with the slurry. The slurry that has passed through the filter hole 7 is stored in the storage unit 15 and transferred to the first filter-equipped stock tank 5 by, for example, a pump (not shown).

  When the pulverized particles in the slurry are separated by the filter device 8, as shown in FIG. 5, the separation of the pulverized particles in the slurry may be promoted by applying vibration to the filter device 8. In this case, as indicated by an arrow B in FIG. 5, the filter device 8 is moved up and down a plurality of times in the device height direction at a predetermined timing of the manufacturing cycle. At this time, the slurry is vibrated in the vertical direction and fluidization is promoted, so that the small-diameter pulverized particles in the slurry easily fall down.

  The stock tank 5 with the first filter takes in the slurry transferred from the filter device 8 via the first tank pre-filter 18. At this time, the agglomerates having a small particle diameter in the slurry are separated from the slurry by the first tank front filter 18 having a filter hole having a small diameter. The slurry in the stock tank 5 with the first filter is transferred to the stock tank 6 with the second filter by a pump (not shown), for example.

  The stock tank 6 with the second filter takes in the slurry transferred from the stock tank 5 with the first filter via the second tank front filter 20. At this time, the agglomerates having a smaller particle size in the slurry are separated from the slurry by the second tank front filter 20 having a filter hole having a smaller diameter. The slurry in the stock tank 6 with the second filter is transferred to the dehydrator 21 by, for example, a pump (not shown).

  The dehydrator 21 dehydrates the slurry transferred from the second filter-equipped stock tank 6 and concentrates the slurry. The dehydrated slurry may be kneaded by, for example, a kneader. The injection machine 22 sucks up the slurry prepared to a predetermined concentration from the dehydrator 21, and injects an amount of slurry necessary for molding into the molding machine 24 through the filter machine 23. The molding machine 24 forms a magnetic field by compressing and molding the slurry fed from the injection machine 22 while applying a magnetic field in a predetermined direction, and sinters the magnet material by firing to form a ferrite magnet. And this ferrite magnet is processed into a predetermined shape, and the ferrite magnet as a product is manufactured.

  By the way, if the filter hole 7 is in the same direction as the slurry transfer direction in the filter unit 14, if the aperture diameter of the filter hole is set small in order to achieve a high removal rate of the aggregate, the aggregate is vigorous in the small diameter hole. This often results in clogging or breakage of the filter holes, which hinders the ease of slurry transfer. In this case, it is only necessary to increase the opening diameter of the filter hole, but conversely, the aggregate cannot be separated efficiently, and a problem arises in terms of the removal rate of the aggregate.

  Therefore, in the case of this example, the pulverized particles in the slurry are fluidized (floated) with a fluid having a specific gravity smaller than this, and the filter unit has a filter hole 7 extending in a direction orthogonal to the slurry transfer direction A1. 14 to separate agglomerates in the slurry. For this reason, even if the opening diameter of the filter hole 7 is reduced aiming at a high removal rate of the aggregates, it is difficult to cause a situation where the large-diameter aggregates collide with the filter holes 7 vigorously. Even if the diameter is reduced, clogging, filter breakage, etc. are less likely to occur. Therefore, it is possible to ensure both the ease of transferring the slurry and the high removal rate of the aggregates in the slurry.

According to the configuration of the present embodiment, the following effects can be obtained.
(1) A filter device that fluidizes pulverized particles in a slurry with a fluid having a smaller specific gravity and separates aggregates in the slurry by a plurality of filter holes 7 extending in a direction orthogonal to the slurry transfer direction A1. 8 was provided. For this reason, it is possible to achieve both the ease of slurry transfer and the high removal rate of the aggregates in the slurry.

  (2) When the filter device 8 is configured to apply vibration, fluidization of the pulverized particles in the fluid is promoted in the filter device 8. Therefore, since the aggregate is easily separated from the slurry, the effect of improving the aggregate removal rate is enhanced.

  (3) Since the slurry after the large particle size aggregates are removed by the filter device 8 is passed through the first tank front filter 18 of the stock tank 5 with the first filter, the first tank front filter 18 is There is no problem even if the filter diameter is small. Therefore, the first tank front filter 18 of the stock tank 5 with the first filter can be a filter having a small filter diameter. The same applies to the stock tank 6 with the second filter.

(4) Since the air layer 17 is provided in the storage unit 15, the slurry can be easily dropped below the filter unit 14.
(5) The large particle size pulverized fluid removed by the filter unit 14 may be returned to the pulverizer 2 to pulverize the pulverized fluid again. In this case, since the magnet material can be used effectively, the material cost is not wasted.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS. In addition, 2nd Embodiment is an Example which changed the aggregate separator 4 into the other structure, Comprising: A basic structure is the same as that of 1st Embodiment. Therefore, in this example, the same portions as those in the first embodiment are denoted by the same reference numerals, detailed description thereof is omitted, and only different portions are described in detail.

  As shown in FIG. 6, the agglomerate separator 4 of this example is a slurry scattering type in which agglomerates in the slurry are scattered by electromagnetic valve pulse waves and sorted according to the flying amount. In this case, the agglomerate separator 4 includes a slurry scattering device 31 that generates a sudden flow in the slurry by sudden opening and closing of the electromagnetic valve 30 to scatter the pulverized particles in the slurry. The slurry scattering device 31 receives a pump 32 for pumping the slurry sent from the pulverizer 2 to the subsequent stage, an electromagnetic valve 30 connected downstream of the pump 32, and slurry and pulverized particles scattered from the electromagnetic valve 30. A storage unit 33.

  The storage unit 33 is provided with a main storage chamber 34 that receives the slurry discharged from the electromagnetic valve 30 and an agglomerate collection chamber 35 that receives the large particle size aggregate discharged from the electromagnetic valve 30. The main storage chamber 34 is connected to the stock tank 5 with the first filter via the pipe 16. The main storage chamber 34 has a chamber having an opening hole 36 in a direction orthogonal to the slurry transfer direction (direction of arrow A2 in FIG. 6) in which the slurry flows downward. In the case of this example, the main storage chamber 34 is disposed on the side close to the electromagnetic valve 30, and the aggregate collection chamber 35 is disposed on the side far from the electromagnetic valve 30.

  Now, as shown in FIG. 7, the slurry pumped from the pump 32 is scattered into the storage portion 33 by an abrupt flow, that is, an electromagnetic valve pulse wave due to a sudden opening and closing of the electromagnetic valve 30. At this time, among the pulverized fluid discharged from the solenoid valve 30, a small particle size, for example, finely pulverized powder or a small particle size aggregate falls into the main storage chamber 34 in the foreground, and a large particle size, for example, a large particle size. Aggregates having a particle size fall into the agglomerate collection chamber 35 at the back. Thereby, it becomes possible to separate a large particle size aggregate from the slurry. The aggregate collected in the aggregate collection chamber 35 may be re-pulverized by the pulverizer 2.

According to the configuration of the present embodiment, in addition to (3) described in the first embodiment, the following effects can be obtained.
(6) Using the characteristics that the pulverized particles in the slurry are scattered by the electromagnetic valve pulse wave, the small pulverized particles fall to the front, and the large sized pulverized particles fly far. A slurry scattering device 31 for separation was provided. For this reason, it is possible to achieve both the ease of slurry transfer and the high removal rate of the aggregates in the slurry. Further, the separation of the aggregates is not limited to the filter device 8, and the aggregates can be removed by the slurry scattering device 31 as in this example.

  (7) The slurry scattering device 31 is a device that forms an abrupt flow in the slurry by sudden opening and closing of the electromagnetic valve 30 and separates the aggregates from the slurry. Therefore, in this example, the aggregate can be efficiently separated from the slurry by controlling the electromagnetic valve 30.

  (8) If the large particle size pulverized particles accumulated in the agglomerate collecting chamber 35 are returned to the pulverizer 2 and pulverized again, the magnet material can be used effectively, so that the material cost is not wasted. Magnets can be manufactured.

Note that the embodiment is not limited to the configuration described so far, and may be modified as follows.
In the first embodiment, the filter hole 7 is not limited to a hole extending in a direction orthogonal to the slurry transfer direction A1. As shown in FIG. 8, the filter hole 7 may take the direction of a hole inclined by a predetermined amount along the vertical direction.

-In 1st Embodiment, the filter hole 7 is not limited to arrange | positioning at a grid | lattice form, For example, you may arrange | position at random.
-In 1st Embodiment, you may arrange | position the filter apparatus 8 between the stock tank 5 with a 1st filter, and the stock tank 6 with a 2nd filter. In this case, the aggregate removal rate can be further increased.

-In 1st Embodiment, the arrangement | positioning place of the filter apparatus 8 is not limited between the grinder 2 and the stock tank 5 with a 1st filter, You may change to another place.
-In 1st Embodiment, the filter apparatus 8 is not limited to being inclined and arrange | positioned so that a downstream side may face down, and may be arrange | positioned straight in a horizontal direction.

In the first embodiment, the filter device 8 may be a conveyor system, and the slurry may be pumped downstream.
-In 1st Embodiment, you may flow a slurry in the transfer direction A1 with a pump.

-In 1st Embodiment, any of a dry type and a wet may be employ | adopted for the fine pulverization of a ferrite calcined body. In short, if the calcined body can be finely pulverized, the method can be changed as appropriate.
-In 1st Embodiment, the filter hole 7 is not limited to a round hole, It can change into other shapes, such as a square hole.

  In the first embodiment, the vibration structure of the filter device 8 may take any structure as long as the filter device 8 can be vibrated. Further, the vibration direction, the number of vibrations, the vibration time, and the like can be changed as appropriate.

In the second embodiment, a plurality of solenoid valves 30 may be arranged side by side to form a plurality of sequences.
-In 2nd Embodiment, a valve member is not limited to the solenoid valve 30, You may employ | adopt another kind.

In each embodiment, the filter member is not limited to the first tank pre-filter 18 and the second tank pre-filter 20, and may be a filter disposed in the middle of the slurry transfer path.
In each embodiment, the slurry may be transferred (pressed) by a pump, or a member other than the pump may be used.

  In each embodiment, a pulverizer may be provided in the front stage of the molding machine 24 so that a slurry having a high concentration can be pulverized. In this case, since the slurry concentration is high immediately before the molding of the magnet, if the slurry is pulverized once before the molding, the pulverized particles can be made finer, and the effect of manufacturing a magnet with high characteristics can be enhanced.

In each embodiment, the slurry concentration may be adjusted at any time.
-In each embodiment, the fluid which the fluid supply part 9 supplies is not limited to water, You may employ | adopt another medium.

-In each embodiment, the separation apparatus does not need to have the fluid supply part 9, and this may be abbreviate | omitted and the structure which consists only of the aggregate separator 4 may be sufficient.
In each embodiment, the configuration of the magnet manufacturing apparatus 1 is not limited to the configuration example described in the embodiment, and other configurations may be adopted as long as the magnet is manufactured from slurry.

  DESCRIPTION OF SYMBOLS 1 ... Magnet manufacturing apparatus, 4 ... Aggregate separator which comprises separation apparatus, 7 ... Filter hole, 8 ... Filter apparatus, 9 ... Fluid supply part which comprises separation apparatus, 14 ... Filter part, 18, 20 ... Filter member A pre-tank filter, 30 ... a solenoid valve as a valve member, 31 ... slurry scattering device, A1, A2 ... slurry transfer direction.

Claims (7)

The calcined body obtained by calcining the magnet material is pulverized, and the pulverized particles are dispersed in a dispersion medium to form a slurry. The slurry is passed through a filter member in the middle of transfer to remove aggregates, In a magnet manufacturing apparatus that manufactures a magnet by dehydrating and molding slurry,
Provided in the middle of the transfer of the slurry, comprising a separation device that fluidizes the pulverized particles with a fluid having a specific gravity smaller than this, and separates the agglomerates from the slurry in a direction intersecting with the transfer direction of the slurry. Magnet manufacturing equipment. The said separation apparatus is provided with the filter apparatus which isolate | separates the aggregate in a slurry with the filter part which has two or more filter holes extended in the direction which cross | intersects the transfer direction of a slurry. Magnet manufacturing equipment. The magnet manufacturing apparatus according to claim 2, wherein the filter device can promote separation of pulverized particles in the slurry by vibration. The separation device is a slurry scattering device that separates agglomerates in the slurry by dropping the slurry with a valve member to drop the slurry with a small particle size toward the front and flying the slurry with a large particle size far away. The magnet manufacturing apparatus according to claim 1, comprising: a magnet manufacturing apparatus according to claim 1. The magnet manufacturing apparatus according to claim 4, wherein the valve member is an electromagnetic valve. The magnet manufacturing apparatus according to any one of claims 1 to 5, wherein a pulverizing apparatus that pulverizes the slurry having a high concentration by the dehydration is provided at a stage before the molding. The calcined body obtained by calcining the magnet material is pulverized, and the pulverized particles are dispersed in a dispersion medium to form a slurry. The slurry is passed through a filter member in the middle of transfer to remove aggregates, In a magnet manufacturing method for manufacturing a magnet by dehydrating and molding a slurry,
The pulverized particles are fluidized with a fluid having a specific gravity smaller than this by a separation device provided in the middle of the slurry transfer, and the aggregates are separated from the slurry in a direction crossing the slurry transfer direction. Magnet manufacturing method.