WO2019082931A1

WO2019082931A1 - Powder processing device

Info

Publication number: WO2019082931A1
Application number: PCT/JP2018/039504
Authority: WO
Inventors: 雅裕猪ノ木
Original assignee: ホソカワミクロン株式会社
Priority date: 2017-10-27
Filing date: 2018-10-24
Publication date: 2019-05-02
Also published as: EP3702040A1; CN111278567B; JP6982467B2; KR20200068671A; EP3702040A4; KR102559996B1; CN111278567A; JP2019076874A

Abstract

To achieve lower air flow rate and finer powder with a simple constitution, a powder processing device is provided with: a cylindrical housing; a raw material supply unit; a first rotating body that rotates around a center axis; a pulverizing member for pulverizing the raw material; a second rotating body that rotates around the center axis; a plurality of blades that are disposed in a radial pattern at one end in a direction perpendicular to the second rotating body; an air inflow unit that is disposed at the lower side of the rotating body and allows inflow of an air flow to the inside of the housing; an air outflow unit for discharging the air flow, including powder, from the top of the housing; and a guide surface that faces the second rotating body in the radial direction and the front side of which is positioned more to the inside in the radial direction than the back side in the direction of rotation of the second rotating body.

Description

Powder processing equipment

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a powder processing apparatus for pulverizing massive raw materials to produce powder particles having a predetermined particle diameter.

A conventional pulverizing apparatus is disclosed in JP-A-2001-259451. This comminution device discharges to the outside a comminution rotor, which is rotatably provided inside the comminution chamber, a liner which is disposed with a gap between the circumference of the comminution rotor, and which has a predetermined particle size or less. The classification rotor, the circulation passage for guiding the raw material not discharged by the classification rotor downward, and the raw material protruding inward from the inner surface of the grinding chamber to collide with the raw material not discharged by the classification rotor swirl along the inner surface of the grinding chamber It has a vane to suppress.

In this comminution device, the input material is comminuted by the comminution rotor and liner. Then, the pulverized raw material is moved upward by the air flow introduced to the inside, and a centrifugal force is applied by the classification rotor. The raw material of the particle size smaller than the predetermined particle size where the inward force by the air flow becomes larger than the centrifugal force is discharged to the outside. The raw material that is not discharged to the outside, that is, the raw material having a particle size larger than the predetermined particle size flows circumferentially along the grinding chamber, but collides with the vane and falls to be ground again with the grinding rotor and liner. As described above, by providing the vanes, it is possible to prevent the pulsation of the grinding rotor and stably drive the grinding rotor without a large amount of raw material falling on the grinding rotor at a stroke.

JP 2001-259451 A

However, in the pulverizing apparatus of JP-A-2001-259451, the air flow generated by the classification rotor also collides with the vanes. The air stream that has collided with the vanes flows vertically. At this time, since the air flow flowing downward collides with the air flow flowing toward the classification rotor from the gap between the grinding rotor and the liner, the flow velocity of the air flow flowing toward the classification rotor, that is, the energy becomes weak. Therefore, in the pulverizing apparatus of JP-A-2001-259451, it is necessary to set the flow rate of the air flow flowing toward the classification rotor to a flow rate that can flow upward even if the air flow colliding with the vane is blown. is there. Then, the particle size of the powder particles classified by the classification rotor is inversely proportional to the number of rotations of the classification rotor and proportional to the square root of the flow rate of the air flow flowing to the classification rotor. In the pulverizing apparatus disclosed in JP-A-2001-259451, it is difficult to reduce the flow rate of the air flowing through the classification rotor, and therefore, it is difficult to make the particles to be classified smaller than a certain particle size.

Therefore, the present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a powder processing apparatus having a simple configuration and capable of reducing the flow rate of air flow and miniaturizing powder particles. To aim.

In order to achieve the above object, a powder processing apparatus according to the present invention comprises a cylindrical casing extending in the vertical direction, a raw material supply unit for supplying a raw material into the casing, and a lower side of the raw material supply unit A first rotating body that rotates about a central axis extending in the vertical direction, a crushing member disposed at a radial outer edge of the first rotating body, and crushing the raw material into powder particles; A swirling air flow generation unit disposed above the one rotation body and generating an air flow in the turning direction in the housing, and an air flow inflow arranged in the housing below the rotation body of the housing and flowing the air flow into the housing And an air flow outflow portion for flowing out the air flow from the upper portion of the housing, and inside the housing, the air flow outflow portion radially faces the swirl air flow generation portion and the rotational direction of the swirl air flow generation portion Located inward in the radial direction compared to the rear Comprising a guide portion having a guide surface.

According to this configuration, the radially inward force is applied to the powder or granular material swirling inside the housing by the guide surface. Therefore, even if the flow rate of the air flow inflowing from the air flow inflow portion is reduced, it is possible to apply a force that pushes the granular material inward in the radial direction. Thereby, the flow rate of the air flow inflowing from the air flow inflow portion can be reduced. In addition, since the flow rate of the air flow can be reduced, the particle size of the powder particles discharged from the air flow outflow portion can be reduced, that is, miniaturization can be performed. Further, by reducing the flow rate of the air flow, the device for generating the air flow can be miniaturized, and the entire device can be miniaturized. Furthermore, by reducing the flow rate of the air flow, it is possible to reduce power consumption and save power.

In the above configuration, the swirling air flow generation unit may include a second rotating body that rotates around a central axis, and a plurality of blades that are radially provided around the periphery of the second rotating body. With such a configuration, classification of powder particles can be performed with a simple configuration.

In the above configuration, a surface of the guide surface, which is circumferentially extended from an end portion on the front side in the rotational direction of the swirling airflow generating portion, is positioned radially outward of the swirling airflow generating portion. With this configuration, the air flow guided by the guide surface is less likely to disturb the centrifugal force applied to the granular material from the swirling air flow generation unit. Moreover, it can suppress that a granular material collides with a turning airflow generation part.

In the above configuration, the housing includes a cylindrical housing cylinder extending along the central axis, and at least one of the guides extends radially inward from the housing cylinder. With this configuration, it is possible to fix the guide firmly.

In the above configuration, the housing includes a housing top plate at an upper end in the vertical direction and extending in a direction perpendicular to the central axis, and at least one of the guides is downward from the lower surface of the housing top plate. Extend. With this configuration, it is possible to fix the guide firmly. In addition, since the guide portion can be taken out together with the housing top plate portion, maintenance is easy.

In the above-mentioned composition, the above-mentioned guidance part is tabular.

In the above configuration, the guide surface is a curved surface in which an intermediate portion in the circumferential direction is expanded in the radial direction.

In the above configuration, the guide surface is located on the front side in the rotation direction of the swirling air flow generating unit with the upper side being lower side.

According to the present invention, it is possible to provide a powder processing apparatus that has a simple configuration, can reduce the flow rate of air flow, and can make fine particles.

It is sectional drawing of the powder processing apparatus concerning this invention. It is a top view of a crushing part. FIG. 3 is a cross-sectional view of the grinding unit shown in FIG. 2 along the line III-III. It is a top view of a turning airflow generation part and a guidance part. It is sectional drawing which shows the other attachment method of a guide plate. It is a top view which shows the other example of the guide part used for the powder processing apparatus concerning this invention. It is a top view which shows the further another example of a guide part. FIG. 1 is a schematic layout view of an example of a powder processing system according to the present invention. It is sectional drawing of the conventional powder processing apparatus used for the test of the comparative example. It is a graph which shows the result of examination 1. 7 is a graph showing the results of Test 2. It is a graph which shows time until a grinding | pulverization part returns to an idle state after stop of raw material supply. It is a graph which shows crushing efficiency. It is a graph which shows the content rate of the fine powder contained in the produced | generated granular material. It is a graph which shows crushing efficiency.

A powder processing apparatus according to the present invention will be described with reference to the drawings.

<1. Configuration of powder processing apparatus>
FIG. 1 is a cross-sectional view of a powder processing apparatus according to the present invention. The powder processing apparatus A crushes lumped material into powder particles. As shown in FIG. 1, the powder processing apparatus A includes a housing 10, a raw material supply unit 20, a drive unit 30, a crushing unit 40, a swirling air flow generation unit 50, a guiding unit 60, and an air flow outflow unit. And 70. The direction in which the central axis C1 extends is referred to as the vertical direction. The direction perpendicular to the vertical direction is taken as the radial direction, the side facing the center is taken as the inside, and the side away from the center is taken as the outside. Further, a direction along a circumference centered on the central axis C1 is taken as a circumferential direction.

<1.1 Configuration of Case 10>
The housing 10 includes a housing 11, a shaft holding portion 12, a raw material receiving hole 13, an air flow inflow portion 14, a bottom cover 15, and a hinge 16. The housing 11 has a cylindrical shape extending along a central axis C1 extending vertically.

<1.1.1 Configuration of Housing 11>
As shown in FIG. 1, the housing 11 includes a housing bottom portion 111, a housing cylindrical portion 112, a flange portion 113, and a housing top plate portion 114. The housing bottom portion 111 is in the form of a disc that radially extends from the center to the outside. The housing 11 is fixed to a rack or the like (not shown) so that the housing bottom 111 is horizontal. The housing cylindrical portion 112 has a cylindrical shape extending upward from the outer edge of the housing bottom 111 along the central axis C1. The housing cylinder portion 112 is cylindrical with the central axis C1 as a center.

The flange portion 113 is disposed at the upper end of the housing cylindrical portion 112 and spreads radially outward. The flange portion 113 and the housing cylindrical portion 112 are an integrally molded body. That is, the housing bottom portion 111, the housing cylindrical portion 112, and the flange portion 113 are integrally formed of metal. In addition, as a metal, although stainless steel can be mentioned, for example, it is not limited to this.

As shown in FIG. 1, the lower end portion of the housing cylindrical portion 112 is closed by the housing bottom portion 111. Further, the upper end portion of the housing cylindrical portion 112 is open. The housing top plate portion 114 closes the opening at the upper end portion of the housing cylindrical portion 112. The housing top plate portion 114 is attached to the flange portion 113 via a hinge 16. Thus, the housing top plate 114 pivots about the rotation shaft 161 of the hinge 16 to open and close the opening of the housing cylinder 112.

Further, in a state in which the opening of the housing cylindrical portion 112 is closed, the housing top plate portion 114 is fixed to the flange portion 113 with a screw or the like. Thus, the housing cylindrical portion 112 and the housing top plate portion 114 are securely fixed and sealed so that the air flow does not leak from the gap. In addition, although fixation by a screw etc. may be one place, in order to perform fixation and sealing reliably, it is preferable to be fixed in multiple places. In addition, gaskets, packings, etc. may be arranged to improve the airtightness.

In the central portion of the housing bottom portion 111, a through hole 115 is formed which penetrates up and down. A first shaft 31 and a second shaft 32, which will be described later, of the drive unit 30 pass through the through hole 115. Further, at a central portion of the housing top plate portion 114, a discharge hole 116 penetrating vertically is provided.

<1.1.2 Configuration of Axis Holder 12>
As shown in FIG. 1, the shaft holding portion 12 has a cylindrical shape which is disposed at the central portion of the housing bottom portion 111 and extends vertically. The center of the axis holding portion 12 coincides with the central axis C1. The shaft holding portion 12 is fixed to the housing bottom portion 111 by a fixing tool such as a screw.

A seal (here, a labyrinth seal) is formed on the upper end portion of the shaft holding portion 12. In this way, the flow of the air flow including the granular material into the shaft holding portion 12 is suppressed without preventing the rotation of the first rotating body 41.

<1.1.3 Configuration of Raw Material Receiving Hole 13>
The raw material receiving hole 13 receives the massive raw material supplied from the raw material supply unit 20 into the housing cylindrical portion 112, that is, the inside of the housing 10. As shown in FIG. 1, the raw material receiving hole 13 is a through hole provided in the housing cylindrical portion 112 and penetrating in the radial direction. The raw material receiving hole 13 is disposed on the upper side of the crushing unit 40 disposed inside the housing cylindrical portion 112.

<1.1.4 Configuration of Airflow Inflow Unit 14>
In the air flow inlet portion 14, an air flow which flows into the inside from the outside of the housing cylinder portion 112 is supplied. As shown in FIG. 1, the air flow inlet portion 14 is a through hole provided in the housing cylindrical portion 112 and penetrating in the radial direction. The air flow inflow portion 14 is disposed below the crushing portion 40.

<1.1.5 Configuration of Bottom Cover 15>
The bottom cover 15 is disposed below the crushing unit 40 inside the housing cylindrical portion 112. The bottom cover 15 is annular. The bottom cover 15 and the first rotating body 41 face each other with a gap at the top and bottom. Then, the air flow flows into the gap between the upper surface of the bottom cover 15 and the lower surface of the first rotating body 41 of the crushing unit 40. By the air flow, the granular material crushed by the crushing unit 40 is conveyed upward and inward. Therefore, the air flow supplied from the air flow in-flow portion 14 is referred to as a transfer air flow for transferring the powder particles.

<1.2 Configuration of Raw Material Supply Unit 20>
As shown in FIG. 1, the raw material supply unit 20 includes a raw material supply pipe 21 and a screw conveyor 22. The raw material supply pipe 21 is a pipe, and a part of the raw material supply pipe 21 is inserted from the raw material receiving hole 13 into the inside of the housing cylindrical portion 112 and fixed. A screw conveyor 22 is rotatably disposed inside the raw material supply pipe 21. The screw conveyor 22 moves the bulk material along the material supply pipe 21 by rotating. The massive raw material moved by the screw conveyor 22 is introduced from the raw material receiving hole 13 into the inside of the housing cylindrical portion 112. In addition, you may employ | adopt conveyance methods other than a screw conveyor.

<1.3 Configuration of Drive Unit 30>
The drive unit 30 drives the crushing unit 40 and the swirling air flow generation unit 50. As shown in FIG. 1, the drive unit 30 includes a first shaft 31, a second shaft 32, a first belt 331, and a second belt 332.

<1.3.1 Configuration of First Shaft 31>
The first shaft 31 is cylindrical. The first rotating body 41 is fixed to the upper end of the first shaft 31. The first shaft 31 is rotatably supported via a bearing (not shown) disposed inside the shaft holding portion 12. The first shaft 31 is vertically supported by the shaft holding portion 12 and rotatably supported around the central axis C1.

The lower end portion of the first shaft 31 penetrates the through hole 115 of the housing bottom portion 111 and protrudes below the housing bottom portion 111. The first pulley 311 is fixed to the lower end portion of the first shaft 31 while being locked to the first shaft 31. Examples of the method of fixing the first pulley 311 include, but are not limited to, press fitting, welding, adhesion, and the like. Also, a key and a key groove may be employed in order to securely prevent the rotation. The cross-sectional shape of the first shaft 31 may be a non-circular shape to prevent rotation.

A first belt 331 is wound around the first pulley 311. The rotational force from a motor (not shown) is transmitted via the first belt 331, and the first pulley 311 rotates around the central axis C1. Accordingly, the first shaft 31 to which the first pulley 311 is attached and the first rotating body 41 fixed to the first shaft 31 rotate around the central axis C1.

<1.3.2 Configuration of Second Shaft 32>
The second shaft 32 is cylindrical and disposed inside the cylindrical first shaft 31. The second shaft 32 is rotatably supported by the first shaft 31 via a bearing (not shown). That is, the second shaft 32 is rotatably supported by the shaft holding portion 12 about the central axis C1.

The lower end portion of the second shaft 32 protrudes below the lower end portion of the first shaft 31. The second pulley 321 is fixed to a portion of the second shaft 32 that protrudes below the lower end portion of the first shaft 31 while being prevented from rotating. Examples of a method of fixing the second pulley 321 include, but are not limited to, press-fitting, welding, adhesion, and the like. Also, a key and a key groove may be employed in order to securely prevent the rotation. In addition, the cross-sectional shape of the second shaft 32 may be a non-circular shape to prevent rotation.

A second belt 332 is wound around the second pulley 321. The rotational force from a motor (not shown) is transmitted via the second belt 332, and the second pulley 321 rotates around the central axis C1. As a result, the second shaft 32 to which the second pulley 321 is attached and the second rotating body 51 fixed to the second shaft 32 rotate around the central axis C1.

In order to make the first pulley 311 and the second pulley 321 rotatable at different rotational speeds, driving forces may be transmitted from different motors. In addition, by using the reduction gear, it is possible to rotate the first pulley 311 and the second pulley 321 at different rotational speeds using a common motor. Here, different rotation numbers include cases where the rotation direction is the same as well as cases where the rotation direction is different.

<1.4 Configuration of Crushing Unit 40>
The grinding unit 40 is disposed below the raw material supply unit 20. Then, the crushing unit 40 crushes the massive raw material supplied from the raw material supply unit 20 into powdery particles. Here, the details of the pulverizing unit 40 will be described with reference to new drawings. FIG. 2 is a plan view of the crushing unit. FIG. 3 is a cross-sectional view taken along line III-III of the grinding unit shown in FIG. As shown in FIGS. 1 to 3, the crushing unit 40 is disposed inside the housing cylindrical portion 112, and includes a first rotating body 41, a hammer 42, and a liner 43.

<1.4.1 Configuration of First Rotatable Body 41>
As shown in FIG. 2, the first rotating body 41 is circular as viewed in the vertical direction. That is, the 1st rotary body 41 is disk shape. At the center of the first rotating body 41, a shaft fixing hole 411 penetrating vertically is provided. The shaft fixing hole 411 is fixed while the first shaft 31 is locked. In addition, fixation with the 1st shaft 31 and the axis | shaft fixed hole 411 can mention a press injection, for example. Moreover, the fixing method which can be fixed other than a screwing welding, adhesion | attachment, etc. is widely employable. In addition, the key groove and the key may be used to securely stop the rotation, or the cross-sectional shape of the first shaft 31 may be set to a shape other than a circle to prevent rotation.

As shown in FIG. 2 and FIG. 3, the upper surface of the first rotating body 41 is provided with a plurality of (here, 12) hammer attachment portions 412 at the outer edge. As shown in FIG. 3, the hammer attachment portion 412 is a recess that is recessed downward from the top surface of the first rotating body 41. The hammer attachment portions 412 are arranged at equal intervals in the circumferential direction. The hammer mounting portion 412 extends inward from the outer edge of the first rotating body 41. Then, the inside of the hammer attachment portion 412 is formed in an arc shape.

<1.4.2 Configuration of Hammer 42>
The hammer 42 is an example of a crushing member. The hammer 42 includes a hammer base 421, a rising portion 422, and a crushing blade 423. The hammer base 421 is flat and inserted into the hammer mounting portion 412. Then, the hammer base 421 is fixed to the first rotating body 41 by, for example, the screw 40a (see FIGS. 2 and 3). The fixing method may be welding, adhesion or the like.

The rising portion 422 integrally protrudes from one end of the hammer base 421 to one side. As shown in FIG. 3, when the hammer base 421 is inserted into the hammer mounting portion 412, the rising portion 422 rises upward. The crushing blade 423 is disposed outside the rising portion 422 in the radial direction. The crushing blade 423 includes a plurality of asperities extending vertically. The unevenness may extend parallel to the central axis C1 or may be inclined in the circumferential direction with respect to the central axis C1.

<1.4.3 Configuration of Liner 43>
As shown in FIG. 3, the liner 43 is annular. The inner surface of the liner 43 radially faces the outer surface of the hammer 42 with a gap therebetween. The liner 43 includes a plurality of liner tips 431, and the liner tips 431 are juxtaposed to each other in the circumferential direction along the inner peripheral surface of the housing cylindrical portion 112. As a result, the liner 43 is formed such that the inner peripheral surface facing the hammer 42 is a polygonal ring. The liner tip 431 may be fixed to the housing cylindrical portion 112 with, for example, a screw. The liner tip 431 is provided with a crushing blade 432 having an uneven surface on the inner surface. The crushing blade 432 may be, similarly to the crushing blade 423 of the hammer 42, an unevenness extending in the vertical direction. Further, the crushing blade 432 may be formed by intersecting concave grooves, and the convex portions may be formed in a polygonal shape such as a square or an equilateral triangle. Also, the pin-shaped convex portions may be two-dimensionally arranged.

As the first rotating body 41 rotates, the crushing blade 423 of the hammer 42 and the crushing blade 432 of the liner tip 431 move relatively in the circumferential direction. The crushing blade 423 and the crushing blade 432 crush the blocky raw material when the first rotating body 41 rotates at a high speed. Therefore, at least the crushing blade 423 of the hammer 42 and at least the crushing blade 432 of the liner tip 431 are high in strength and hardness and excellent in wear resistance, ceramic (alumina, zirconia, etc.), tungsten carbide, cemented carbide, tool steel, etc. It is formed by In addition, you may form the hammer 42 whole with these materials. Moreover, the material with high abrasion resistance is an example, and is not limited to these.

The surface of the liner tip 431 on which the crushing blade 432 is formed is flat. Therefore, as compared with the configuration in which the grinding blade 432 is provided on the curved surface, manufacture of the liner tip 431 is easier. In addition, by changing the number of liner tips 431, it is possible to change the inner diameter of the liner 43 within a certain range. Therefore, it is possible to make the liner tip 431 common to the liners 43 of different sizes. In addition, since the liner tip 431 has a simple shape, it is easy to manufacture the liner tip 431 using a material that is difficult to process in a complicated shape, such as ceramic. Thereby, it is possible to reduce the cost required to manufacture the powder processing apparatus A. The grinding blade 432 may be formed on the inner surface of the annular liner 43.

Although omitted in the present embodiment, an upper surface plate may be attached to the upper surface of the first rotating body 41. The upper surface plate is provided to suppress damage, wear, and the like of the first rotating body 41, the hammer 42, the screw 40a, and the like due to the collision of the raw material input from the raw material receiving hole 13. In addition, as a top plate, it is possible to comprise with the material excellent in abrasion resistance.

<1.5 Configuration of Swirling Airflow Generating Unit 50>
The swirling airflow generating unit 50 is disposed above the crushing unit 40 inside the housing 10. That is, the discharge hole 116 is provided on the upper side of the swirling airflow generation unit 50. The swirling airflow generation unit 50 generates a swirling airflow inside the housing 10 by rotating. Then, the swirling airflow generation unit 50 generates a swirling airflow to apply a centrifugal force to the granular material. The details of the swirling airflow generation unit 50 will be described with reference to new drawings. FIG. 4 is a plan view of the swirling air flow generating unit and the guiding unit. As shown in FIG. 1 and FIG. 4, the swirling airflow generation unit 50 includes a second rotating body 51 and a plurality of blades 52.

<1.5.1 Configuration of Second Rotator 51>
As shown in FIG. 4, the second rotating body 51 is circular in plan view. That is, the 2nd rotary body 51 is disk shape. The second shaft 32 is fixed to the second rotating body 51 while being prevented from rotating. The centers of the second rotating body 51 and the second shaft 32 overlap with the central axis C1. The second shaft 32 may be fixed by press-fitting into a through hole (not shown), or may be screwed, welded, bonded, or the like. In addition, the locking may be performed using a key and a key groove. As a result, when the second shaft 32 rotates, the second rotating body 51, that is, the swirling air flow generation unit 50 rotates around the central axis C1.

<1.5.2 Configuration of Blade 52>
The plurality of blades 52 are fixed on the upper surface of the second rotating body 51 at equal intervals in the circumferential direction. The plurality of blades may be fixed by welding, adhesion, or the like after being inserted into, for example, a recessed groove formed on the upper surface of the second rotating body 51. The upper side of the blade 52 fixed to the upper surface of the second rotating body 51 extends outward. That is, when the swirling airflow generation unit 50 rotates, the portion through which the outer end of the upper end portion of the blade 52 passes is the outermost portion in the passage area of the blade 52.

The blade 52 has a plane orthogonal to the turning direction of the turning air flow generation unit 50. As the swirling airflow generation unit 50 rotates, an airflow flowing in the circumferential direction is generated inside the housing 10. As shown in FIG. 4, the swirling airflow generation unit 50 rotates in a counterclockwise direction Rd in a plan view. An air flow (hereinafter referred to as a swirling air flow) swirling in the counterclockwise direction Rd along the housing cylindrical portion 112 in the housing 10, that is, the housing cylindrical portion 112 by the rotation of the swirling air flow generation unit 50. Occur. In addition, although the details will be described later, the granular material is sorted (hereinafter classified) according to the size of the particle by the swirling airflow generated by the swirling airflow generation unit 50.

<1.6 Configuration of Guide Unit 60>
As shown in FIGS. 1 and 4, the guide portion 60 includes a guide plate 61 and a support rib 62 which are disposed inside the housing cylindrical portion 112. The guide plate 61 is an example of a guide member.

<1.6.1 Configuration of Guide Plate 61>
As shown in FIG. 4, a plurality of (here, six) guide plates 61 are arranged at equal intervals in the circumferential direction inside the housing cylindrical portion 112. The guide plate 61 is a rectangular plate, and the guide plate 61 extends vertically. And the guide plate 61 is provided with the guide surface 611 which opposes the turning air flow generation part 50 to radial direction. As shown in FIG. 1, the lower end portion of the guide surface 611 extends to the same or substantially the same position as the lower end portion of the blade 52 of the swirling airflow generation unit 50.

As shown in FIG. 4, the guide plate 61 is provided with the housing cylindrical portion 112 such that the front side of the rotational air flow generation portion 50 of the guide surface 611, that is, the second rotary body 51 in the rotational direction is inside compared to the rear side. It is fixed to the inner surface of the In addition, as a fixing method of the guide plate 61, welding, adhesion, etc. can be mentioned, but it is not limited to this, and a configuration in which it is inserted and fixed in a groove provided in the housing cylindrical portion 112 may be used. . A wide variety of fixing methods capable of securely fixing the guide plate 61 can be adopted.

As shown in FIG. 4, a surface 612 extending along the circumferential direction from the front end of the rotational flow generating unit 50 of the guide surface 611 in the rotational direction is outside the area through which the blade 52 of the rotational flow generating unit 50 passes. To position. The guide surface 611 guides the airflow generated by the swirling airflow generation unit 50 inward so that the airflow is not directly blown to the swirling airflow generation unit 50. As a result, the granular material swirled by the swirling air current is guided inward while suppressing collision with the blade 52.

<1.6.2 Configuration of Support Rib 62>
As shown in FIGS. 1 and 4, the support rib 62 is in the form of a plate fixed to the surface of the guide plate 61 opposite to the guide surface 611 and the inner surface of the housing cylindrical portion 112. The support rib 62 fixes the guide plate 61. By providing the support rib 62, deflection when the air flow is blown to the guide plate 61 is suppressed, and the guide plate 61 guides the swirling air flow inward.

In the present embodiment, one support rib 62 is provided at the upper and lower center of the guide plate 61. However, a plurality of support ribs 62 may be provided. Moreover, you may provide the support rib 62 which supports the whole guide plate 61. FIG.

<1.6.3 About another example of a guidance part>
Another example of the guiding unit 60 will be described. FIG. 5 is a cross-sectional view showing another way of attaching the guide plate. As shown in FIG. 5, the guide plate 61 may be fixed to the lower surface of the housing top plate portion 114. In FIG. 5, the guide plate 61 is fixed to the housing top plate portion 114 by screwing, but welding, welding or the like may be employed other than screwing. Further, as shown in FIG. 5, the guide plate 61a may be directly attached to and fixed to the lower surface of the housing top plate portion 114, or may be inserted into a concave portion formed on the lower surface of the housing top plate portion 114 and recessed upward. It may be a guide plate 61b. With this configuration, by removing the housing top plate portion 114, the guide plates (61a, 61b) can be taken out to the outside, so maintenance of the guide plates (61a, 61b) is easy. In addition, when attaching a guide plate to the housing top plate part 114, a guide plate should just be a shape which does not become obstructive at the time of opening and closing of the housing top plate part 114. As shown in FIG. In addition, the housing top plate portion 114 may be attached to the flange portion 113 without a hinge.

FIG. 6 is a plan view showing another example of the guide portion used in the powder processing apparatus according to the present invention. As shown in FIG. 6, a curved guide plate 63 may be used. In such a guide plate 63, the guide surface 631 is also a curved surface. And, the guide 631 is guided such that the surface 632 extending along the circumferential direction from the front end of the second rotary body 51 in the rotational direction of the guide surface 631 is outside the area through which the blade 52 of the swirling air flow generation unit 50 passes A plate 63 is disposed. Thus, by providing the curved guide surface 631, it is possible to smoothly guide the swirling air flow. In addition, although the guide surface 631 is a curved surface convex to the outer side, it is not limited to this, A curved surface convex shape may be sufficient as inner side. Depending on the flow velocity of the swirling air flow, the viscosity of the air flow, and the like, it is possible to widely adopt a shape in which the vortices are not easily generated.

Furthermore, guide

members

64, 65, 66 as shown in FIG. 7 may be provided. FIG. 7 is a plan view showing still another example of the guide portion. As shown in FIG. 7, as the guide member 64, not a flat guide plate but a guide member 64 protruding in the radial direction may be used. At this time, the surface of the guide surface 641 of the guide member 64 in which the end on the front side in the rotational direction of the second rotating body 51 is extended is outside the area where the blade 52 of the swirling air flow generation unit 50 passes. Further, like the guide member 65, the guide surface 651 may be elongated, or the guide surface 661 may be curved like the guide member 66. The

guide members

64, 65, 66 may be integrally formed with the housing 11. Further, the

guide members

64, 65, 66 manufactured as separate members may be fixed to the inside of the housing 11. And the

surfaces

642, 652, 662 which extended the end by the side of the front of the rotation direction of the 2nd rotary body 51 of the

guide surface

641, 651, 661 are the outer sides from the field where the blade 52 of swirling airflow generation part 50 passes. become.

The guide surfaces 611, 631, 641, 651, and 661 described above are surfaces that extend vertically, that is, surfaces that are at the same position in the circumferential direction from the upper end to the lower end. However, it is not limited to this. For example, the upper side of the guide surface may be located on the front side in the rotation direction of the first rotating body 41 with respect to the lower side. Thereby, the swirling air flow can be guided to the inside smoothly.

<1.7 Configuration of Airflow Outflow Unit 70>
The air flow outflow portion 70 discharges the air flow (air) flowing in from the air flow inflow portion 14 to the outside. As shown in FIG. 1, the air flow outflow portion 70 is attached to the upper surface of the housing top plate portion 114. The air flow outflow portion 70 includes an exhaust cylinder portion 71 and an exhaust flange 72. The exhaust cylinder portion 71 is cylindrical and communicates with the discharge hole 116 provided at the center of the housing top plate portion 114. Then, the air inside the housing 11 flows into the exhaust cylinder portion 71 through the discharge hole 116.

The exhaust flange 72 may be disposed on the upper surface of the housing top plate 114 via a gasket (not shown). Then, the exhaust flange 72 is fixed to the housing top plate portion 114 by, for example, a screw. Thereby, the sealability between the housing top plate portion 114 and the exhaust cylinder portion 71 is enhanced, and the leakage of the air flow is suppressed. Instead of the gasket, an O-ring or the like may be used. Alternatively, a concave portion may be formed in one of the air flow outlet portion 70 and the housing top plate portion 114, and a convex portion may be formed in the other, and the convex portion may be inserted into the concave portion to seal.

<2. About operation of powder processing equipment>
The powder processing apparatus A according to the present invention has the configuration described above. Next, a powder processing system using the powder processing apparatus A will be described, and the operation of the powder processing apparatus included in the powder processing system will be described. FIG. 8 is a schematic layout view of an example of the powder processing system according to the present invention. The powder processing system CL shown in FIG. 8 includes a raw material supply device Ma, a powder processing device A, a filter device Ft, and a blower Bw.

The powder processing apparatus A is fixed to the horizontal surface of the pedestal Ca with a screw or the like (not shown). Then, the air flow outflow portion 70 of the powder processing apparatus A and the inflow portion Ft3 of the filter device Ft are connected via a pipe. The filter device Ft is, for example, a bug filter. The filter device Ft includes a housing Ft1, a partition Ft2, an inflow portion Ft3, an outflow portion Ft4, a filter medium Ft5, and an outlet Ft6. In the filter device Ft, the partition part Ft2 divides the inside of the housing Ft1 into an upper part and a lower part. The partition Ft2 is provided with a plurality of through holes. On the lower side of the partition Ft2 of the housing Ft1, a cylindrical filter material Ft5 surrounding the periphery of the through hole of the partition Ft2 and extending downward is disposed.

The air flow from the powder processing apparatus A flows into the housing Ft1 from the inflow portion Ft3, passes through the filter medium Ft5, and flows out from the outflow portion Ft4. At this time, particulate matter is collected on the outer surface of the filter medium Ft5. In the filter device Ft, compressed gas (compressed air) is periodically sprayed from a pipe (not shown) to drop the powder and particulate matter collected by the filter medium Ft5 downward.

An outlet Ft6 is provided at the lower end of the housing Ft1. The powder particles accumulated in the lower part of the housing Ft5 are taken out from the takeout port Ft6. In the powder processing system CL, the powder particles taken out of the takeout port Ft6 are powder particles after classification, that is, manufactured articles.

The outlet Ft4 of the filter device Ft is connected to the blower Bw via a pipe. The blower Bw generates a negative pressure in the pipe connected to the outlet Ft4. Due to the generation of the negative pressure, an air flow toward the blower Bw is generated in the filter device Ft, the powder processing device A, and the pipe connecting them. Further, in the powder processing apparatus A, the negative pressure causes the air flow from the air flow inflow portion 14. Note that a separate blower (not shown) may be provided outside the air flow inlet portion 14 to force the generated air flow.

The operation of the powder processing apparatus A will be described. In the powder processing apparatus A, in a state where the first rotating body 41 and the second rotating body 51 are rotating, bulk material is supplied from the material supply unit 20. The raw material supplied from the raw material supply unit 20 falls on the first rotating body 41 of the pulverizing unit 40. The raw material is crushed into powder by a crushing blade 423 of the hammer 42 and a crushing blade 432 of the liner 43.

In the powder processing apparatus A, air (air flow) flows into the inside of the housing 11 from the air flow inflow portion 14 as described above. The air flow introduced from the air flow in-flow portion 14 flows radially outward from the gap between the first rotating body 41 and the bottom cover 15, and along the housing cylindrical portion 112 from between the first rotating body 41 and the liner 43 Flow upwards. The outflow destination of the air flow is the air flow outflow portion 70. Therefore, the air flow flowing out between the first rotating body 41 and the liner 43 is directed upward and inward. In addition, when the air flow passes between the first rotating body 41 and the liner 43, the air flow moves together with the pulverized powder. That is, the granular material crushed by the crushing part 40 is conveyed toward the upper side and the inside by the carrier air flow.

In the upper part of the housing 11, a swirling airflow is generated by the swirling airflow generation unit 50. The carrier air flowed in from the air flow in portion 14 merges with the swirling air flow. At this time, two forces of a force F1 directed inward by the carrier air flow and a force F2 directed outward by the swirling air flow act on the powder particles contained in the carrier air flow. The force F1 changes according to the flow rate (flow velocity) of the carrier air flow, and the force F1 also increases as the carrier air flow increases. The force F2 changes according to the flow rate (flow velocity) of the swirling airflow, that is, the rotation speed of the swirling airflow generation unit 50, and the force F2 also increases as the rotation speed of the swirling airflow generation unit 50 increases.

From the above, among the granular materials carried by the carrier air flow, the particle size of the granular material carried together with the air flow discharged from the air flow outflow portion 70 is the flow rate of the carrier air flow and It depends on the number of revolutions. More specifically, the median diameter D _{50 of the particulate} matter discharged from the air flow outflow portion 70 is proportional to the square root of the flow rate of the carrier air flow, and inversely proportional to the rotational speed of the swirling air flow generation portion 50. In the powder processing apparatus A, by adjusting the flow rate of the carrier air flow and the rotation speed of the swirling air flow generation unit 50, the particle size of the powder particles discharged from the air flow outflow unit 70 is determined. The particle size can be adjusted to The median diameter D ₅₀ is a particle diameter at which the number of powder particles having a diameter smaller than the particle diameter is equal to the number of powder particles having a larger diameter when the particles are arranged in the order of particle diameter. is there.

Moreover, the granular material which is not discharged | emitted from the airflow outflow part 70 by classification has a larger particle size than the determined particle size. Such particulate matter is pushed outward by the swirling air flow, contacts the inner surface of the housing cylindrical portion 112, and then moves downward along the inner surface of the housing cylindrical portion 112. Then, after being crushed again by the crushing blade 423 of the hammer 42 and the crushing blade 432 of the liner 43, the material is again conveyed upward by the conveying air flow.

As described above, the pulverization by the hammer 42 and the liner 43, the conveyance by the conveyance air flow, and the classification by the swirling air flow are repeated to generate the powder particles which are crushed into the particle diameter of the determined particle diameter and the particle diameter smaller than that. In addition, the produced granular material is collected by the filter device Ft and taken out.

In the powder processing apparatus A according to the present invention, the guide plate 61 is disposed inside the housing 11. The guide surface 611 of the guide plate 61 guides the swirling air flow inward. By this operation, the swirling air flow is directed inward. The force F1 due to the swirling air flow can be smaller than in the case where the guide plate 61 is not disposed. Therefore, it is possible to lower the flow rate of the carrier air flow and the rotation speed of the swirling air flow generation unit 50 in order to obtain a predetermined particle diameter. In other words, since the flow rate of the carrier air flow can be suppressed to a low level, the fine particles can be miniaturized. In addition, by lowering the flow rate of the carrier air flow and the rotational speed of the swirling air flow generation unit 50, power consumption can be reduced, that is, energy saving can be achieved.

Further, the guide surface 611 is arranged to guide the swirling air flow inward smoothly. Therefore, compared with the conventional configuration in which the swirling airflow collides with the plate-like member, the powder particles are less likely to adhere to the guide plate 61, and vortices are less likely to occur in the swirling airflow. Therefore, powder and granular material can be manufactured smoothly and efficiently.

In addition, it is also possible to use a so-called air flow drying apparatus that removes moisture of the powder particles crushed by the hammer 42 and the liner 43 by flowing high temperature and low humidity from the air flow inflow portion 14, that is, high temperature dry air. It is possible.

<2.1 Another Example of Powder Processing Device>
In the powder processing apparatus, it is possible to adjust the particle size of the powder particles moving inward by using the swirling airflow generated by the swirling airflow generation unit 50 and the airflow transported by the transport airflow. By using this to repeat grinding between the grinding blade 423 of the hammer 42 and the grinding blade 432 of the liner 43 while discharging powder particles having a particle size of less than a constant particle size, with a constant particle size, It is possible to produce a powder having a small number of pointed parts, ie, close to spherical (referred to as "spheronization"). And the extraction port not shown is provided in the housing cylinder part 112 of the powder processing apparatus A, and it can obtain the spherical powder body by taking out from an extraction port.

As described above, in the powder processing apparatus A, since the swirling air flow is directed inward at the guide surface 611, the powder particles can be conveyed inward even if the flow rate of the conveying air flow is low. Even if the flow rate of the carrier air flow is low, the powder particles are unlikely to remain inside the housing 11. Thereby, crushing is repeated by the crushing blade 423 of the hammer 42 and the crushing blade 432 of the liner 43, and excessive crushing which is excessively crushed can be suppressed, and the generation amount of fine powder can be suppressed.

<3. About evaluation of powder processing equipment>
The characteristics of the powder processing apparatus A according to the present invention were evaluated. The conventional powder processing apparatus P was used as a comparative example. FIG. 9 is a cross-sectional view of a conventional powder processing apparatus used in the test of the comparative example.

The powder processing apparatus P shown in FIG. 9 has substantially the same configuration as the powder processing apparatus A shown in FIG. 1 except that an inner cylinder 81 and vertical vanes 82 are provided instead of the guide plate 61. . Therefore, in the powder processing apparatus P, parts substantially the same as the powder processing apparatus A are given the same reference numerals, and detailed descriptions of the same parts will be omitted. In FIG. 9, the reference numerals of parts not directly related to the features of the present invention are also omitted.

As shown in FIG. 9, the powder processing apparatus P includes an inner cylinder 81 inside the housing cylindrical portion 112. The inner cylinder 81 has a cylindrical shape that wraps the outer side of the swirling air flow generation unit 50. The vertical vanes 82 are flat and connect the outer surface of the inner cylinder 81 and the inner surface of the housing cylindrical portion 112. A plurality of (for example, six) vertical vanes 82 are provided and arranged along the radial direction.

In the powder processing apparatus P, the granular material transported to the swirling air flow in the circumferential direction along the housing cylindrical portion 112 and collides with the vertical vanes 82. And it falls to the lower side. Then, the dropped powdery particles are crushed again by the crushing unit 40. The powder processing apparatus P of the comparative example has such a configuration.

The operation of the powder processing apparatus P will be described. In the powder processing apparatus P, as in the powder processing apparatus A, the raw material supplied from the raw material supply unit 20 falls onto the first rotating body 41 of the pulverizing unit 40. The raw material is crushed into powder by a crushing blade 423 of the hammer 42 and a crushing blade 432 of the liner 43. Then, the crushed raw material is conveyed by the conveying air flow, and passes between the inner periphery of the housing cylindrical portion 112 and the outer periphery of the inner cylinder 81. Thereafter, the granular material is classified by the swirling air flow generation unit 50. Then, powder particles smaller than the determined particle diameter pass through the gap of the blade 52 and are discharged to the outside from the discharge hole 116. Further, the powder particles having a particle diameter larger than the determined particle diameter move downward inside the inner cylinder 81 and drop into the first rotating body 41. Then, the dropped powder particles are crushed again into fine particles, that is, particles with a small particle diameter, by the crushing blade 423 of the hammer 42 and the crushing blade 432 of the liner 43. In the powder processing apparatus P, by repeating the above operation, the raw material is crushed into powder particles and classification is performed.

<3.1 Test conditions>
In the following evaluation, a test result using the powder processing apparatus A of the present invention is taken as an example, and a test result performed using a conventional powder processing apparatus P is taken as a comparative example. Let the outer diameter of the outer side of the hammer 42 of the crushing part 40 be a hammer outer diameter. The tests are conducted under the same conditions in both the example and the comparative example. The conditions of the test are as follows. In addition, about the part to which the condition has changed for every evaluation, it demonstrates for every evaluation. In the graph used for the following description, an Example is shown with a square and a comparative example is shown with a triangle.
Shape of hammer crusher blade: Tatemizo Hammer outer diameter: 318.1 mm
Number of hammers: 12 pcs rotation speed: 7000 rpm
Rotating air flow generator rotation speed: 2000rpm-7000rpm
Pulverized material: Heavy calcium carbonate (particle size about 1 mm)

<3.2 Evaluation 1>
In the evaluation 1, the operation conditions of the powder processing apparatus A and the powder processing apparatus P were as described above, and the flow rate of the carrier air flow was changed in each powder processing apparatus, and tests 1 and 2 were performed. The flow rate of the carrier air flow in each test is as follows.
Examination 1
Carrier airflow: Standard flow Test 2
Carrier air flow rate: 1/3 the standard flow rate

The standard flow rate is an air flow supplied to the powder processing apparatus P in the conventional powder processing performed using the powder processing apparatus P, that is, the flow rate of the carrier air flow. The results of

Tests

1 and 2 are shown in FIG. 10 and FIG. FIG. 10 is a graph showing the results of Test 1. FIG. 11 is a graph showing the results of Test 2. In the graphs shown in FIG. 10 and FIG. 11, the ordinate represents the grinding efficiency (kg / kW · h), and the abscissa represents the median diameter (D ₅₀ μm). The grinding efficiency indicates the throughput of the raw material per unit power.

As shown in FIG. 10, when the flow rate of the carrier air flow is high (standard flow rate), almost no difference appears in the grinding efficiency between the example and the comparative example. On the other hand, as shown in FIG. 11, when the flow rate of the carrier air flow is small (1/3 of the standard flow rate), the crushing efficiency of the example is higher than that of the comparative example. That is, it was found that the powder processing apparatus A of the present invention had a high crushing efficiency compared to the conventional powder processing apparatus P when the flow rate of the carrier air flow was small.

<3.3 Evaluation 2>
Next, the flow rate of the carrier air flow was set to 1 / 3.75 of the standard flow rate in both the example and the comparative example, and after stopping the supply of the raw material, the time to return to no load, that is, the time to return to idling was compared. The results are shown in FIG. FIG. 12 is a graph showing the time until the grinding unit returns to the idle state after the supply of the raw material is stopped.

In the graph of FIG. 12, the vertical axis represents the time until the load on the grinding unit 40 is minimized after the supply of the raw material is stopped, that is, the idle state is restored. The horizontal axis is the median diameter D ₅₀ of the product powder granules. The time for which the particulates stay inside the housing 11 is the time required for the treatment.

As shown in FIG. 12, after stopping the supply of the raw material, the time to return to the idle state is shorter in the example than in the comparative example when the median diameter D ₅₀ is the same. That is, when the flow rate of the carrier air flow is small, it can be seen that the processing time until the powder processing apparatus A grinds the raw material than the powder processing apparatus P and obtains the powder of the determined particle size is short. The Thereby, it is understood that the powder processing apparatus A of the present invention can shorten the tact time of the processing compared to the conventional powder processing apparatus P when the flow rate of the carrier air flow is small.

<3.4 Evaluation 3>
Next, the raw material was changed from ground calcium carbonate to scaly graphite (median diameter D ₅₀ is 85 μm). Furthermore, as the crushing blade 432 of the liner 43, a square-milling liner in which grooves are orthogonal to each other and a convex portion is rectangular is used. The rotation speed of the crushing unit 40 is 6800 rpm in both the embodiment and the comparative example, and the rotation velocity of the swirling air flow generation unit 50 is 3000 rpm and 7000 rpm in the embodiment and the comparison example. The flow rate of the carrier air flow is 1/3 of the standard flow rate in both the embodiment and the comparative example. The test results are shown in FIG. FIG. 13 is a graph showing the grinding efficiency. Graph of FIG. 13, similar to the graph of FIG. 13, crushing a longitudinal axis efficiency, and the median diameter D ₅₀ of the horizontal axis.

Even when the raw material is changed from heavy calcium carbonate to squamous graphite, the grinding efficiency of the powder processing apparatus A according to the present invention is smaller than that of the conventional powder processing apparatus P when the flow rate of the carrier air flow is small. It also turned out to be expensive.

<3.5 Evaluation 4>
In Evaluation 4, the test was performed using polystyrene as a raw material. When a material such as polystyrene which is hard to break is used and the flow rate of the carrier air flow is low, in the conventional powder processing apparatus P, the fluctuation of the grinding load becomes large and stable operation can not be performed. From this, it was found that the powder processing apparatus A according to the present invention had high operation stability at a low air volume as compared to the conventional powder processing apparatus P. That is, it was found that the powder processing apparatus A according to the present invention can reduce the air flow more than the conventional powder processing apparatus P.

<3.6 Evaluation 5>
Next, in the evaluation 5, the test was performed with the raw material as a flake-like powder coating (5 mm in diameter, 1 mm in thickness). And the content rate (fine powder rate) of the fine powder (particle size less than 9.25 micrometers) contained in the granular material discharged | emitted from the airflow outflow part 70 was acquired by the volume ratio. The conditions of the test are the same as in the test 2 of Evaluation 1. The results are shown in FIG. FIG. 14 is a graph showing the content of fine powder contained in the produced granular material. 14, the vertical axis fines ratio, and the median diameter D ₅₀ of the horizontal axis.

When powder particles having the same median diameter D ₅₀ are produced, the powder processing apparatus A of the present invention has a lower fine powder ratio than that of the conventional powder processing apparatus P. That is, when powder particles having a determined particle diameter are generated using the same amount of raw material, the powder processing apparatus A of the present invention can generate more particles than the conventional powder processing apparatus P. That is, it can be seen that the powder processing apparatus A of the present invention has less waste than the conventional powder processing apparatus P, and the powder processing efficiency is high.

<3.7 Evaluation 6>
In the evaluation 6, tests were performed using a powder processing apparatus A1 and a powder processing apparatus P1 having different sizes from those used in the evaluation 1 to the evaluation 5. The test conditions are as follows.
Shape of hammer grinding blade: Tatemizo Hammer outer diameter: 430.3 mm
Number of hammers: 32 pcs rotation speed: 6600 rpm
Rotating air flow generator rotation speed: 3000rpm to 5400rpm
Pulverized material: Heavy calcium carbonate (particle size about 1 mm)
Liner crusher blade shape: Triangular slot flow of carrier air flow: 2/3 of standard flow

Under the above conditions, tests were performed using the powder processing apparatus A1 according to the present invention and the conventional powder processing apparatus P1, and the crushing efficiency was obtained. The test results are shown in FIG. FIG. 15 is a graph showing the grinding efficiency. Figure 15 is crushed ordinate efficiency, and the median diameter D ₅₀ of the horizontal axis.

As shown in FIG. 15, when the powder processing apparatus A1 according to the present invention is used, the pulverization efficiency is higher than when the conventional powder processing apparatus P1 is used. As a result, even if the size of the powder processing apparatus, the size of the housing, the size of the crushing portion, and the number of hammers change, the powder processing apparatus according to the present invention having the guide surface is the conventional powder processing apparatus. It can be seen that the grinding efficiency is higher than that.

As described above, in the powder processing apparatus according to the present invention, the housing has a guide surface for guiding the swirling air flow generated inside the housing to the inside, so that crushing is performed compared to the conventional powder processing apparatus. The efficiency is high and the powder processing time can be shortened. In addition, the use of the powder processing apparatus according to the present invention requires less raw materials necessary to obtain powder particles having a determined particle size, as compared to the case of using a conventional powder processing apparatus. In addition, in the powder processing apparatus A of the present invention, compared with the conventional powder processing apparatus P, the flow rate of the air flowed in can be reduced, that is, the flow rate of the air flow can be reduced. In addition, from this point, in the powder processing apparatus A of the present invention, it is possible to make the produced powder particles finer as compared with the conventional powder processing apparatus P.

As mentioned above, although embodiment of this invention was described, this invention is not limited to this content. Moreover, the embodiment of the present invention can add various modifications without departing from the spirit of the invention.

Reference Signs List 10 housing 11 housing 111 housing bottom portion 112 housing cylindrical portion 113 flange portion 114 housing top plate portion 115 through hole 116 discharge hole 12 shaft holding portion 13 raw material receiving hole 14 air flow inflow portion 15 bottom cover 20 raw material supply portion 30 drive portion 31 1 shaft 311 first pulley 32 second shaft 321 second pulley 331 first belt 332 second belt 40 crushing unit 41 first rotary body 412 hammer attachment unit 42 hammer 423 crushing blade 43 liner 432 crushing blade 50 swirling air flow generation unit 51 Second rotating body 52 blade 60 guide portion 61 guide plate 62 support rib 63 guide plate 64 guide member 65 guide member 66 guide member 70 air flow outflow portion 71 exhaust tube portion 72 exhaust flange A powder processing device CL Body treatment system Ft filter device Bw blower

Claims

A cylindrical casing extending in the vertical direction;
A raw material supply unit for supplying a raw material into the housing;
A first rotating body disposed below the raw material supply unit and rotating about a central axis extending in the vertical direction;
A pulverizing member which is disposed at a radially outer edge of the first rotating body and pulverizes the raw material into powdery particles;
A swirling air flow generating unit which is disposed above the first rotating body in the casing and generates a swirling flow of air in the casing;
An air flow inflow portion which is disposed under the rotating body of the case and allows air flow into the case;
An air flow outflow portion for flowing out the air flow from an upper portion of the housing;
The inside of the housing is provided with a guiding portion having a guiding surface which is radially opposed to the swirling air flow generating portion and which is located radially inward of the front side in the rotational direction of the swirling air flow generating portion compared to the rear side. Powder processing equipment.
The powder according to claim 1, wherein the swirling air flow generation unit includes a second rotating body that rotates around a central axis, and a plurality of blades that are radially provided on a peripheral portion of the second rotating body. Processing unit.
The powder processing apparatus according to claim 2, wherein a surface of the guide surface, which extends in the circumferential direction from the front end in the rotational direction of the second rotating body, is positioned radially outward of the swirling air flow generating portion.
The housing comprises a cylindrical housing cylinder extending along the central axis,
The powder processing apparatus according to any one of claims 1 to 3, wherein at least one of the guides extends radially inward from the cylindrical housing.
The upper end portion of the housing is provided with a housing top plate that extends in a direction orthogonal to the central axis,
The powder processing apparatus according to any one of claims 1 to 4, wherein at least one of the guides extends downward from the lower surface of the housing top plate.
The powder processing apparatus according to any one of claims 1 to 5, wherein the guide portion has a plate shape.
The powder processing apparatus according to any one of claims 1 to 6, wherein the guide surface is a curved surface in which an intermediate portion in a circumferential direction is radially expanded.
The powder processing apparatus according to any one of claims 1 to 7, wherein the guide surface is positioned on the front side in the rotation direction of the swirling air flow generating unit with the upper side being lower side.
A powder processing apparatus according to any one of claims 1 to 8,
The air flow drying apparatus which makes hot air flow in from the said air flow inflow part.
A powder processing apparatus according to any one of claims 1 to 8,
In the inside of the said case, a granular material is classified,
The classification apparatus provided with the collection part which collects the granular material which the outside diameter contained in the air flow discharged | emitted from the said air flow outflow part falls in the predetermined range outside the said air flow outflow part.
A powder processing apparatus according to any one of claims 1 to 8,
The said housing | casing is a spheroidization apparatus provided with the granule extraction part which takes out the spherical particle which takes out the spherical powder body formed in the said housing outside.