WO2011040620A1

WO2011040620A1 - Processing device

Info

Publication number: WO2011040620A1
Application number: PCT/JP2010/067309
Authority: WO
Inventors: 要介中野; 良章小矢島; 石川　修; 靖由関根; 雄介高橋
Original assignee: 日本コークス工業株式会社
Priority date: 2009-10-02
Filing date: 2010-09-27
Publication date: 2011-04-07
Also published as: KR20120073279A; DE112010003894T5; DE112010003894B4; KR101378068B1; DE112010006106B4; JP5575139B2; DE112010006106A5; CN102574084B; JPWO2011040620A1; CN102574084A

Abstract

Disclosed is a processing device that performs processes such as compositing by applying strong pressure or shear force to granular materials. Said processing device, which has a simple structure and can easily find optimal processing conditions, is provided with: a vertical mixing vessel (20); a rotating shaft (30) inserted through the bottom of the mixing vessel (20); a plurality of stirring blades (40) provided on the rotating shaft (30); and a plurality of impact plates (50) affixed to the mixing vessel (20). Letting the diameter of the mixing vessel (20) be d, the minimum distance between the stirring blades (40) and the impact plates (50) is at most 0.1d.

Description

Processing equipment

The present invention relates to a processing apparatus for processing powder particles, and more particularly to a processing apparatus capable of performing advanced processing such as compounding and spheroidization.

When processing particles with micron-order or nano-order particle sizes, particles with a large aspect ratio are spheroidized, particles with a large particle size are coated on the surface of particles, and multiple types of particles There is a wide demand for the treatment of powder particles, such as compounding them into integrated spherical particles.
For example, Patent Document 1 describes a processing apparatus as shown in FIG. The processing apparatus 110 includes a horizontal cylindrical mixing tank 120, a rotary shaft 130 provided through one side wall, and a plurality of stirring blades 140 provided on the rotary shaft 130. Since the treatment of the powder is accompanied by a large heat generation, the mixing tank 120 is provided with a jacket 193 so that it can be cooled by passing water.
In addition, on both sides of the mixing tank 120, a powder inlet 191 and an outlet 192 are provided so that continuous processing can be performed. The stirring blade 140 includes a “feed blade” having an inclination to send the processed material toward the discharge port 192 by rotation, and a “return blade” having an inclination to return the processed material to the input port 191 by rotation. Are combined alternately.
In the processing apparatus 110, a strong force can be repeatedly applied to the processing object alternately by the “feed blade” and the “return blade”. And processing, such as compounding and coating of a granular material, can be performed. It is considered that the action and effect on the granular material is greatly influenced by structural elements such as the shape and arrangement of the stirring blades 140. However, there is a problem that it is not easy to change the structural element, the processing conditions cannot be changed easily, and it is difficult to find the optimum processing conditions.
Patent Document 2 describes a processing apparatus as shown in FIG. The processing apparatus 210 includes a rotary shaft 230 provided inside the vertical mixing tank 220 through the tank bottom of the mixing tank 220. The rotating shaft 230 is provided with a cylindrical rotating body 281 and a plurality of stirring blades 240. The rotating body 281 is provided with a plurality of openings 282, and the inner surface thereof is pressed by a press head 283. The mixing tank 220 is provided with a jacket 293 so that it can be cooled by water flow.
The processing device 210 performs batch processing. The processed material put into the mixing tank 220 is subjected to processing while circulating and flowing inside and outside the rotating body 281. That is, the processed material flows from the inside to the outside of the rotating body 281 through the opening 282, is pushed upward by the stirring blade 240 outside the rotating body 281, and returns from the outside to the inside at the top of the rotating body 281. And inside the rotary body 281, the press head 283 gives a strong compressive force and a shearing force to a processed material, and processings, such as a composite and coating of a granular material, can be performed.
However, the processing device 210 is an expensive device due to its complicated structure. Further, since the structure is complicated, there is a problem that it is difficult to control the flow of the processed material and it is difficult to find the optimum processing condition.

JP 2005-270955 A JP 2005-15910 A

An object of the present invention is a processing apparatus that performs advanced processing such as compounding and coating by applying a strong compressive force and shearing force to a processed product of a granular material, and has a simple structure and a flow of the processed product It is an object of the present invention to provide a processing apparatus that can easily control the processing conditions and can easily find the optimum processing conditions.

In order to solve the above-mentioned problems, a processing apparatus according to claim 1 of the present invention is provided with a bowl-shaped mixing tank, a rotating shaft provided through the tank bottom of the mixing tank, and the rotating shaft. A powder processing apparatus comprising a plurality of stirring blades and a plurality of collision plates fixed to the mixing tank, wherein the diameter of the mixing tank is d and the stirring blades and the collision plates The shortest distance between and is 0.1d or less.
The processing apparatus according to claim 2 of the present invention is the processing apparatus according to claim 1, wherein the collision plate has a width of 0.05d to 0 when the diameter of the mixing tank is d. .25d and the height is 0.05d to 0.2d. Moreover, the processing apparatus according to claim 3 of the present invention is the processing apparatus according to

claim

1 or 2, wherein the mixing tank is cylindrical and the bottom corner of the tank is round and smoothly formed. When the diameter is d, a means having a radius of curvature of 0.05 d or more is adopted.
A processing apparatus according to claim 4 of the present invention is the processing apparatus according to any one of claims 1 to 3, wherein the stirring blades are arranged on an inclined surface of a boss portion formed in a substantially conical shape. Adopting means. The processing apparatus according to claim 5 of the present invention is the processing apparatus according to claim 4, wherein the upper part of the stirring blade is connected by a ring-shaped upper plate, and the ring-shaped upper plate and the inclined surface are connected. The means by which the granular material flows from the inside toward the outside is adopted.
Further, the processing apparatus according to claim 6 of the present invention employs means in the processing apparatus according to claim 4 or 5, wherein the rotation shaft includes an auxiliary blade positioned above the stirring blade. ing. Furthermore, the processing apparatus according to a seventh aspect of the present invention is the processing apparatus according to any one of the first to third aspects, wherein the rotating shaft includes an inclined blade positioned inside the stirring blade. Adopted.

By adopting the above-described configuration, the processing apparatus of the present invention has a simple structure and can apply a strong compressive force or shearing force to the processed material, such as compounding and coating of powder particles. Advanced processing can be performed. And it is easy to control the flow of a processed material, and the optimal process conditions can be found easily.

FIG. 1 shows an example of the processing apparatus of the present invention, wherein (1) is a schematic longitudinal sectional view, and (2) is a schematic transverse sectional view.
2 shows the processing apparatus of FIG. 1 in detail, (1) is a schematic longitudinal sectional view, and (2) is a detailed view of part A of (1).
FIG. 3 shows another example of the processing apparatus of the present invention, where (1) is a schematic longitudinal sectional view, (2) is a detailed view of a portion B of (1), and (3) is a view taken along arrows XX in (2). It is sectional drawing.
FIG. 4 shows still another example of the processing apparatus of the present invention, where (1) is a schematic longitudinal sectional view, and (2) is a detail view of part C of (1).
FIG. 5 shows still another example of the processing apparatus of the present invention, wherein (1) is a schematic longitudinal sectional view, and (2) is a schematic transverse sectional view.
FIG. 6 shows still another example of the processing apparatus of the present invention. (1) is a schematic longitudinal sectional view, and (2) is a view taken in the direction of arrows Y-Y in (1).
FIG. 7 shows still another example of the processing apparatus of the present invention, wherein (1) is a schematic longitudinal sectional view, and (2) is a schematic transverse sectional view.
FIG. 8 is a sample photograph of the product obtained with the processing apparatus of the present invention.
FIG. 9 is a sample photograph of a product obtained with a conventional processing apparatus.
FIG. 10 is a schematic sectional view showing an example of a conventional processing apparatus.
FIG. 11 is a schematic sectional view showing another example of a conventional processing apparatus.

Hereinafter, embodiments of the present invention shown in the drawings will be described. FIG. 1 shows an embodiment of a processing apparatus according to the present invention. FIG. 1 (1) is a longitudinal sectional view, and FIG. 1 (2) is a transverse sectional view. 2 is a detailed explanatory view of FIG. 1, FIG. 2 (1) is a longitudinal sectional view, and FIG. 2 (2) is a detailed view of part A of (1).
The processing apparatus 10 is fixed to the bowl-shaped mixing tank 20, a rotating shaft 30 provided through the tank bottom of the mixing tank 20, a plurality of stirring blades 40 provided on the rotating shaft 30, and the mixing tank 20. A plurality of collision plates 50 are provided. A lid 60 is provided at the top of the mixing tank 20 and is connected by a flange 61. The lid 60 is provided with a processed material inlet, and the mixing tank 20 is provided with a product outlet, which is not shown in the figure.
The processing apparatus 10 of the present invention is characterized in that a circulating flow of powder particles is formed in the mixing tank 20, thereby promoting the mixing process. That is, an inertia force is given to the granular material by the rotation of the stirring blade 40, and the granular material is discharged upward along the tank wall from the vicinity of the tank bottom corner. The granular material rises near the tank wall and descends near the tank center, thereby forming a circulating flow in the mixing tank.
The mixing tank 20 is not limited to a cylindrical shape, and may have a shape in which the diameter gradually decreases from the lower part to the upper part, a spherical shape, or the like. However, in any shape, the mixing tank 20 is limited to a vertical shape in which the rotation shaft 30 is provided substantially vertically. Hereinafter, the diameter inside the mixing tank 20 is demonstrated as d. And when the diameter of the mixing tank 20 changes with height, the diameter d shall show a maximum diameter.
When the mixing tank 20 is cylindrical, it is preferable that the bottom corner of the tank is round and smoothly formed. This is because the granular material subjected to the inertial force by the stirring blade 40 is smoothly discharged upward. As shown in FIG. 2 (2), when the radius of curvature at the roundness at the bottom corner of the tank is R, R is preferably 0.05 d or more, and more preferably 0.1 d or more. However, R has an upper limit and is 0.5 d or less.
The rotating shaft 30 is sealed with respect to the mixing tank 20 by a ground seal or an air seal not shown. Moreover, although the rotating shaft 30 is driven by an electric motor or the like, it is preferable that the rotation speed is variable and is set as one of setting conditions.
In the processing apparatus 10, the stirring blade 40 is disposed on the inclined surface of the boss portion 41 formed in a substantially conical shape, is attached to the rotary shaft 30, and is disposed in the vicinity of the tank bottom of the mixing tank 20. The shape and number of the stirring blades 40 are not particularly limited, but it is desirable that the stirring blades 40 give a strong inertial force to the powder and strongly release upward from the vicinity of the bottom of the tank along the tank wall.
In order to increase the inertial force applied to the powder body, the diameter I of the stirring blade 40 is preferably as large as possible at the bottom of the tank. That is, when the mixing tank 20 is cylindrical, the diameter I of the stirring blade 40 is preferably 0.7 d or more, and more preferably 0.85 d or more.
Moreover, the processing apparatus 10 of this invention is equipped with the some collision board 50 fixed to the mixing tank 20, and is characterized by the above-mentioned. By placing the impingement plate 50 in a part of the circulating flow, it is possible to apply a strong compressive force and shearing force to the granular material, and to perform processing such as compounding and coating of the granular material. In the processing apparatus 10, the collision plate 50 is welded to the tank wall of the mixing tank 20.
The vicinity of the stirring blade 40 is a place having the strongest inertial force in the circulating flow. Therefore, it is preferable to place the collision plate 50 close to the stirring blade 40. As indicated by a gap e1 in FIG. 2 (2), the shortest distance between the stirring blade 40 and the collision plate 50 is preferably 0.1 d or less, and more preferably 0.01 d or less.
In order to give a strong inertial force to the granular material, the rotational speed of the stirring blade 40 is preferably as high as possible. However, if the rotational speed is too high, the coated particles may be peeled off or the base particles as a base may be destroyed. Become. Therefore, the practical tip speed of the stirring blade 40 is in the range of 20 to 150 m / s, and preferably in the range of 30 to 100 m / s.
The shape and number of the collision plates 50 are not particularly limited, but it is necessary to give a strong impact to the circulating flow of the granular material and not to disturb the circulating flow of the granular material. Therefore, the number is preferably about 4 to 12. Further, as shown in FIG. 2 (2), the width W is preferably 0.05d to 0.25d and the height H is preferably 0.05d to 0.2d.
FIG. 3 shows another embodiment of the processing apparatus according to the present invention. FIG. 3 (1) is a longitudinal sectional view, FIG. 3 (2) is a detailed view of part B of FIG. It is XX arrow sectional drawing in 2).
The processing apparatus 11 is different from the processing apparatus 10 in that an inner intubation 51 including a collision plate 50 is inserted into the mixing tank 20. The flange 52 of the inner tube 51 is sandwiched between the flanges 61 of the mixing tank 20. Therefore, by preparing a plurality of intubation tubes 51, it is possible to perform processing while changing the shape of the collision plate 50 and the like.
The mounting angle θ of the collision plate 50 will be described using the processing device 11. FIG. 3 (3) showing a cross section taken along the line XX in FIG. 3 (2) shows the positional relationship between the stirring blade 40 and the collision plate 50 that are provided close to each other. The angle between the rotation direction of the stirring blade 40 indicated by the arrow and the collision surface of the collision plate 50 is defined as θ.
The angle θ ranges from 30 degrees to 90 degrees. By providing such an angle, when the granular material collides with the collision plate 50, a force toward the bottom surface of the mixing tank 20 is given to the circulating flow, and a particularly strong shearing force is generated. When the angle θ exceeds 90 degrees, the shearing force decreases, and when it is less than 30 degrees, the effect of inhibiting the circulation flow increases. The optimum angle θ varies depending on the properties of the powder and is 45 ° to 75 ° for a powder having good fluidity and 60 ° to 90 ° for a powder having poor fluidity.
FIG. 4 shows still another embodiment of the processing apparatus according to the present invention. FIG. 4 (1) is a longitudinal sectional view, and FIG. 4 (2) is a detailed view of part C of (1).
The processing device 12 is characterized in that the collision plate 50 is fixed to the lid 60 by a support portion 55 and a support ring 56. Although not shown, this structure can make the support part 55 removable with respect to the lid | cover 60, for example. Therefore, it is possible to prepare a plurality of types of collision plates 50 and perform processing with different conditions.
In the processing apparatus 12, a gap e2 is provided between the collision plate 50 and the tank wall. By providing the gap e <b> 2, the gap e <b> 2 part also becomes a part of the circulation flow path and the processed material flows. On the back side (back side) of the collision surface where the processed object collides with the collision plate 50, the processed object may become a dead space, but this problem can be solved by providing the gap e2. . A value of about 10 mm is usually sufficient for e2.
FIG. 5 shows still another embodiment of the processing apparatus according to the present invention. FIG. 5 (1) is a longitudinal sectional view and FIG. 5 (2) is a transverse sectional view.
Similar to the processing apparatus 10, the processing apparatus 13 includes a plurality of collision plates 50 that are fixed to the mixing tank 20. Further, in the processing device 13, as in the processing device 10, the stirring blade 40 is disposed on the inclined surface of the boss portion 41 formed in a substantially conical shape, and the upper portion of each stirring blade 40 is further ring-shaped. The upper plate 42 is connected. As a result, a flow path for the processed material is formed between the ring-shaped upper plate 42 and the inclined surface of the boss portion 41, and the powder particles flow stably from the inside toward the outside. become.
FIG. 6 shows still another embodiment of the processing apparatus according to the present invention. FIG. 6 (1) is a longitudinal sectional view, and FIG. 6 (2) is a view taken in the direction of arrows YY of (1).
This processing device 14 is similar to the processing device 12 in that the collision plate 50 includes a support portion 55 and a support ring 56, but is different from the processing device 11 in that the upper portion includes a flange portion 52. It is similar. Further, the processing device 14 is such that the stirring blades 40 are arranged on the inclined surface of the boss portion 41 formed in a substantially conical shape, and the upper portions of the stirring blades 40 are connected by the ring-shaped upper plate 42. Although it is similar to the processing apparatus 13, the rotating shaft 30 further includes an auxiliary blade 45 above the stirring blade 40.
As shown in FIG. 6 (2), the auxiliary blade 45 has an action of drawing the surrounding processed material into the center of the mixing tank 20 when rotated in the direction of the arrow. As a result, the auxiliary blade 45 promotes the circulation flow of the processed material, and is suitable for processing a granular material having poor fluidity.
FIG. 7 shows still another embodiment of the processing apparatus according to the present invention. FIG. 7 (1) is a longitudinal sectional view, and FIG. 7 (2) is a transverse sectional view.
The processing device 15 is characterized by the stirring blade 40 and includes a stirring blade 40 arranged on the upper surface of the ring-shaped bottom plate 43 and an inclined blade 46 provided on the boss portion 41. Here, the inclined blades 46 are located inside the stirring blades 40 and have an inclination so as to scrape the processed material. Therefore, as shown in FIG. 7B, when the inclined blade 46 rotates in the direction of the arrow, the granular material is scraped from the top to the bottom at the center of the mixing tank 20 to promote the circulation flow of the processed material. Will do.
As described above, the processing apparatus of the present invention has a simple structure, and the processed material is processed by forming a simple circulating flow. Therefore, it is easy to grasp the characteristics of the flow of the processed material, and it is easy to control this. Moreover, although the change of the processing conditions depends on the shape and rotation speed of the stirring blades and the shape of the collision plate, all can be performed relatively easily, and the optimal processing conditions can be easily found.
The processing apparatus of the present invention is considered to be usable in a very wide field. For example, as an electrode material in a lithium ion battery, it is possible to coat lithium cobaltate with carbon. Moreover, it is possible to coat nylon with titanium dioxide as a cosmetic material. It is also possible to coat a pigment on PMMA powder used as a substitute for inorganic glass.
Further, as a powder coating material, it is possible to coat a pigment on the surface of particles such as an epoxy resin. Moreover, it is possible to spheroidize graphite particles as a battery material. For electronic printing, it is possible to coat the surface of toner particles with ultrafine silica or titanium dioxide.

FIG. 8 is a photomicrograph of the product processed by the processing apparatus 10. The treated product is a mixture of crosslinked PMMA (70%) and titanium dioxide (30%) having an average particle size of about 5 μm. FIG. 9 is a photomicrograph of a product processed by a conventional processing apparatus that does not include a collision plate, and the processed product is the same. By comparing the two, the effect of the collision plate is clearly shown. That is, in FIG. 8, all the particles are spherical, and the surface is processed smoothly. On the other hand, in FIG. 9, the shape of the particles is not necessarily spherical, and the surface remains rough.

10, 11, 12, 13, 14, 15, 110, 210

Processing device

20, 120, 220

Mixing tank

30, 130, 230 Rotating

shaft

40, 140, 240 Stirrer blade 41 Boss portion 42 Ring-shaped top plate 43 Ring-shaped bottom plate 45 Auxiliary blade 46 Inclined blade 50 Collision plate 51 Inner tube 52 Gutter 55 Support portion 56 Support ring 60 Cover 61 Flange 191 Input port 192

Discharge port

193, 293 Jacket 281 Rotating body 282 Opening 283 Press head

Claims

A bowl-shaped mixing tank, and a rotary shaft provided through the tank bottom of the mixing tank;
A plurality of stirring blades provided on the rotating shaft;
A processing apparatus for a granular material comprising a plurality of collision plates fixedly provided in the mixing tank,
When the diameter of the mixing tank is d, the shortest distance between the stirring blade and the collision plate is 0.1 d or less.
The impact plate has a width of 0.05d to 0.25d and a height of 0.05d to 0.2d, where d is the diameter of the mixing tank. The processing apparatus according to 1.
2. The mixing tank according to claim 1, wherein the mixing tank has a cylindrical shape, the bottom corner of the tank is round and smoothly formed, and when the diameter of the mixing tank is d, the radius of curvature is 0.05 d or more. 2. The processing apparatus according to 2.
The processing apparatus according to any one of claims 1 to 3, wherein the stirring blades are arranged on an inclined surface of a boss portion formed in a substantially conical shape.
The upper part of the stirring blade is connected by a ring-shaped upper plate, and the granular material flows between the ring-shaped upper plate and the inclined surface from the inside toward the outside. Treatment device.
The processing apparatus according to claim 4 or 5, wherein the rotating shaft includes an auxiliary blade positioned above the stirring blade.
The processing apparatus according to any one of claims 1 to 3, wherein the rotation shaft includes an inclined blade located inside the stirring blade.