KR101245869B1 - Media-Agitating Wet Pulverizer - Google Patents

Abstract

[Problem] A media stirring wet disperser capable of dispersing nanometer orders and having a large capacity and excellent classification performance.

[Solution] An outer rotor 4 having a cylindrical dispersion tank 2, a pipe-shaped rotary shaft 3, a plurality of vanes 43 arranged in a cylindrical shape and generating centrifugal force, and an outer side. It has the inner rotor 5 which is located inside the rotor 4, is provided with the blade 53 arrange | positioned in a cylindrical shape, and produces centrifugal force. The outer rotor 4 has a function of pulverizing and dispersing particles, and the inner rotor 5 has a function of separating media and a classification function. As a result, the dispersion function and the classification function work in harmony.

Description

Media-Agitating Wet Pulverizer

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic sectional drawing which shows an example of implementation of the media stirring type wet dispersion machine of this invention.

FIG. 2 is a schematic sectional view taken along line A-A shown in FIG. 1.

3 is a schematic cross-sectional view showing an example of another embodiment of the media stirred wet disperser of the present invention.

4 is a schematic cross-sectional view taken along line B-B shown in FIG. 3.

<Description of the symbols for the main parts of the drawings>

1, 101: media stirring wet dispersion machine 2, 102: dispersion tank

3, 103: axis of rotation 4, 104: outer rotor

5, 105: inner rotor 6, 106: jacket

7, 107: media 21, 125: flange

22, 126: lid member 23, 127: supply port

31, 131: hollow part 32, 132: opening

33, 134: outlet 34, 133: shaft sealing

41, 141: holding part 42, 142: cylindrical part

43, 144: wings 44, 145: opening

45, 146: key 51, 151: holding part

52, 152: cylindrical part 53, 154: wing

54, 155 opening 55, 153 bolt

56, 156: space 61, 161: water supply port

62, 162: drain port 121: inner cylinder

122: outer cylinder 123, 124: end plate

143: protrusion 181: reinforcement chamber

182: the main room

[Patent Document 1]

Japanese Patent Application Laid-Open No. 11-33377

[Patent Document 2]

Japanese Patent Publication No. 2003-144950

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a media-stirred wet dispersion machine which continuously performs dispersion treatment, and more particularly, to a media-stirred wet dispersion machine in which solid particles contained in a treatment liquid are ground to form nanometer-order fine particles. .

A wet dispersion process is a process which grind | pulverizes the particle | grains contained in a liquid, and makes it a finer microparticle. In addition, it is frequently practiced in a wide range of fields such as inks, paints, ceramic fine particles, metals, inorganic materials and pharmaceuticals.

One of the dispersers used for such a treatment is a media stirring type disperser. This disperser stirs together the processing liquid and the media in a vessel, and disperses the particles by crushing the particles by the shear force of the media.

The treated dispersion liquid is separated from the media by a separator provided in the container and then discharged out of the container. As the separator, many body types are used, such as a gap type and a screen type.

In this dispersion treatment, the particle diameter after the treatment is greatly influenced by the media diameter. That is, in order to make fine particle dispersion liquid, it is necessary to use the media with small diameter.

Conventionally, media with a diameter of 0.3 mm or more are used. In this case, the average particle diameter of the dispersion liquid normally obtainable is 100 nm (nanometer) or more.

It is difficult to make the fine particles smaller than 100 nm, and very long time is required even if possible.

Therefore, the method of obtaining the dispersion liquid into which the average particle diameter was microparticles | fine-particles to less than 100 nm is studied by using the media whose diameter is 0.2 mm or less.

For example, Patent Document 1 describes a method for producing a dispersion liquid using micro beads having a diameter of 0.2 mm or less as a medium. The material of the media is ceramics, hard glass, hard plastic, metal or metal compound.

However, when the diameter of the media becomes small, the separator separating the dispersion and the media becomes a problem. For this reason, in the gap type or the screen type, the gap of the sieve needs to be 1/3 or less of the media diameter. Therefore, manufacture of a separator becomes difficult. In addition, a lot of troubles such as biting and loading occur, and stable continuous operation cannot be performed.

In recent years, in each field, there is an increasing demand for dispersion treatment in which the particle diameter is in nanometer order. Therefore, in the media stirring type wet dispersion machine, it is further required to make the diameter of the media 0.1 mm or less.

However, when the diameter of the media is reduced in this way, it is impossible to use a body type such as a gap type or screen type. Therefore, a different type of separator is required.

As a separator which solves such a problem, the centrifugal separator which isolates a media and a dispersion liquid by centrifugal force is proposed (for example, patent document 2).

In this centrifugal separator, two discs are arranged side by side at regular intervals on a rotating shaft, and a plurality of blades are arranged in a cylindrical shape between the two discs.

However, in this disperser, the blade for grinding also serves as a blade for separation. Therefore, it is difficult to adjust the balance of a grinding | pulverization function and a classification function. Therefore, it leaves the problem that it is difficult to fully exhibit the performance of both.

An object of the present invention is to economically enable dispersion treatment in which the particle diameter is in nanometer order. To this end, it is to provide a media stirred wet disperser capable of using media having a diameter of 0.1 mm or less. The present invention also provides a media stirring type wet dispersion machine capable of stable continuous operation.

Moreover, it is providing the media stirring type wet dispersion machine which reliably separates a microparticle and a media. Moreover, it is providing the media stirring type wet dispersion machine which is excellent in the classification performance of microparticles | fine-particles.

MEANS TO SOLVE THE PROBLEM In order to solve the said subject, the media-stirred wet type disperser which concerns on Claim 1 of this invention is a cylinder-type dispersion tank with one end closed, and the other end side of the said dispersion tank is rotatably installed. An outer rotor having a pipe-shaped rotating shaft, a plurality of vanes arranged in a cylindrical shape, fixed to the rotating shaft to generate centrifugal force, and positioned inward of the outer rotor and arranged in a cylindrical shape It has a plurality of vanes, and has an inner rotor for generating a centrifugal force by being fixed to the rotary shaft to rotate, the dispersion tank is provided with a supply port for communicating in and out of the dispersion tank, the rotary shaft of the pipe shape is The means which forms the discharge port through the inside of a rotor inside is employ | adopted.

In addition, in the media-stirred wet dispersion machine according to claim 2 of the present invention, in the media-stirred wet dispersion machine according to claim 1, the dispersion tank includes a ring-shaped reinforcement chamber connected to one end side thereof. A means in which one end of the outer rotor is located in the reinforcement chamber is employed.

Moreover, the media stirring type wet dispersion machine which concerns on Claim 3 of this invention is the media stirring type wet dispersion machine of Claim 2 WHEREIN: The said outer rotor located in the said reinforcement chamber is equipped with some protrusion in the outer periphery part. We adopt means to have.

In addition, in the media-stirred wet dispersion machine according to claim 4 of the present invention, in the media-stirred wet dispersion machine according to any one of claims 1 to 3, a plurality of blades of the outer rotor is provided with a plurality of blades of the inner rotor. The means provided in the position closer to the said one end of the said dispersion tank than a blade | wing is employ | adopted.

In addition, the media stirring type wet dispersion machine according to claim 5 of the present invention is the media stirring type wet dispersion machine according to any one of claims 1 to 4, wherein the supply port is provided at the other end of the dispersion tank. Means are adopted.

In addition, the media stirring type wet dispersion machine according to claim 6 of the present invention is the media stirring type wet dispersion machine according to any one of claims 1 to 5, wherein the dispersion tank includes a cooling jacket on the outside thereof. It is adopted.

BEST MODE FOR CARRYING OUT THE INVENTION [

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention shown in drawing is described.

1 and 2 show a first embodiment of a media stirred wet disperser according to the present invention. 1 is a schematic cross-sectional view of a media stirring type wet dispersion machine, and FIG. 2 is a schematic cross-sectional view taken along line A-A shown in FIG. 1.

This media stirring type wet disperser 1 is comprised by the dispersion tank 2, the rotating shaft 3, the outer rotor 4, the inner rotor 5, etc.

The dispersion tank 2 is a cylindrical container with one end closed. At the other end, the lid member 22 is installed through the flange 21, and the other end thereof is substantially closed. Moreover, it is preferable to make the installation position of the supply port 23 provided in the dispersion tank 2 into the vicinity of the other end of the dispersion tank 2, and it is desirable to provide it to the lid member 22 as shown in the figure. Particularly preferred. This is because the situation is good due to the positional relationship between the circulation flow and the outlet described later.

The lid member 22 is formed in substantially cylindrical shape, and the rotating shaft 3 of a pipe shape is provided in the shaft center freely for rotation. Between the outer circumferential surface of the rotating shaft 3 and the inner circumferential surface of the lid member 22, a shaft sealing 34 is provided therebetween, so that the dispersion tank 2 can be sealed.

The rotating shaft 3 is a pipe shape in which the hollow part 31 was formed in the center of the shaft, and is provided in the same shaft through the other end of the dispersion tank 2 by fitting. In the dispersion tank 2, an outer rotor 4 and an inner rotor 5 are provided at one end of the rotating shaft 3. Moreover, the other end of the rotating shaft 3 is located outside of the dispersion tank 2, and the drive device is provided (not shown).

The outer rotor 4 is provided with the cylindrical part 42 which consists of the some wing | wing 43 arrange | positioned at the cylindrical shape at regular intervals on one surface of the disk-shaped holding part 41. As shown in FIG. The open end of the cylindrical portion 42 is located at one end side of the dispersion tank 2, and the other end closed by the holding portion 41 is the key 45 at the other end side of the dispersion tank 2. It is attached to the rotating shaft (3) by.

Therefore, when the outer rotor 4 rotates in the direction of the arrow in the figure, centrifugal force is generated by the blade 43. Then, the processing liquid flows from the inside to the outside through the opening 44 between the wings 43. As a result, the processing liquid and the media 7 in the dispersion tank 2 form a circulation flow. That is, the outer side of the wing 43 flows from the other end side toward the one end side, the open one end flows from the outside toward the inside, and the inner side of the wing 43 from the one end side to the other end side. Flow.

In addition, by the rotation of the outer rotor 4, the processing liquid in the dispersion tank 2 is stirred together with the media 7. Then, the grinding and dispersing treatment is performed by the shear force generated between the inner wall of the dispersion tank 2 and the blade 43. At the same time, the whole processing liquid is stirred well by circulating inside and outside of the outer rotor 4, and the whole processing liquid is processed uniformly.

The inner rotor 5 is located inside the outer rotor 4 and has a cylindrical portion made up of a plurality of blades 53 arranged in a cylindrical shape at regular intervals on one surface of the disc-shaped holding portion 51 ( 52). The open end of the cylindrical portion 52 is fixed to the rotary shaft 3 by a bolt 55 in a state in which the open end of the tubular portion 52 is brought into close contact with one surface of the holding portion 41 of the outer rotor 4.

The outer circumferential surface of the wing 53 is located slightly away from the inner circumferential surface of the wing 43 of the outer rotor 4. Then, the gap between the outer circumferential surface of the wing 53 and the inner circumferential surface of the wing 43 becomes a flow path of a circulation flow formed inside and outside the outer rotor 4 as described above, A flow is formed from one end side to the other end side.

In addition, the inner circumferential surface of the blade 53 is located slightly away from the outer surface of the rotation shaft 3, and the space portion 56 is formed inside the blade 53. The opening 32 is provided in the position of the space part 56, and the hollow shaft 31 is connected to the space part 56 in the rotating shaft 3. As a result, the hollow part 31 of the rotating shaft 3 forms the discharge port 33 of a dispersion liquid.

That is, the dispersion liquid which received the grinding | pulverization and dispersion process in the said circulation flow flows into the space part 56 via the opening 54 between the blades 53, and is discharged | emitted from the discharge port 33. FIG.

When the inner rotor 5 rotates in the direction of the arrow shown in the drawing, like the outer rotor 4, the centrifugal force is generated by the blades 53. Therefore, the separation function and the classification function are exerted on the particles passing through the opening 54. That is, the particles and the media 7 having a large particle diameter cannot enter the space portion 56, and only the fine particles are discharged through the space portion 56.

In addition, the large particles and the media 7 which could not flow into the space 56 are immediately returned to the circulation flow formed inside and outside the outer rotor 4. Then, the pulverization and dispersion treatment are performed again, so that the dispersion treatment and the classification treatment can be surely performed.

Since the inner rotor 5 is located inside the outer rotor 4, the vanes 53 and the vanes 43 are at about the same position with respect to the axial direction. As a result, large particles separated from the inner rotor 5 can be quickly returned to the circulation flow of the outer rotor 4.

In addition, the blade 43 is preferably installed at a position closer to one end of the dispersion tank (2) than the blade (53). For this reason, the gap between the outer circumferential surface of the wing 53 and the inner circumferential surface of the wing 43 is a flow path of the circulation flow, and forms a flow from one end side of the dispersion tank 2 to the other end. Thus, when the wing 43 is closer to one end of the dispersion tank 2 than the wing 53, the wing 43 is located upstream of the circulation flow, and the wing 53 is located downstream of the circulation flow. .

Therefore, after the upstream wing 43 separates large particle in advance, the downstream wing 53 performs final separation and classification, and becomes an efficient process.

The members directly contacting the processing liquids such as the dispersion tank 2, the outer rotor 4, and the inner rotor 5 are preferably made of a wear-resistant material, and ceramics such as alumina, alumina zirconia, and silicon carbide are used. It is desirable to. As a result, the incorporation of impurities into the product can be prevented.

The media stirring type wet dispersion machine 1 of the present invention can perform a strong stirring operation in a relatively narrow dispersion tank 2. Therefore, as shown in the figure, it is preferable to provide the cooling jacket 6 outside the dispersion tank 2 to forcibly cool the dispersion tank 2. The cooling jacket 6 covers the whole of the dispersion tank 2 as much as possible, and installs the water supply port 61 and the drain port 62 in consideration so that cooling water does not flow in a biased manner. The jacket 6 enables temperature management of the workpiece. Moreover, it can also be used as a heating jacket for the initial stage of a process.

Next, 2nd Embodiment of the media stirring type wet dispersion machine which concerns on this invention is shown to FIG. 3 and FIG. FIG. 3 is a schematic cross-sectional view of the media stirring wet disperser, and FIG. 4 is a schematic cross-sectional view taken along line B-B shown in FIG. 3.

This media stirring type wet dispersion machine 101 is constituted by a dispersion tank 102, a rotation shaft 103, an outer rotor 104, an inner rotor 105, and the like. In order to reinforce the dispersing function, the dispersing tank 102 is provided with a reinforcing chamber 181 at one end thereof. That is, the dispersion tank 102 is formed by the main chamber 182 of circular cross section which adjoins each other on the same axis, and the reinforcement chamber 181 of cross section.

Specifically, one end of the double cylinder which consists of the inner cylinder 121 and the outer cylinder 122 on the same axis is closed by the end plate 123. As shown in FIG. In addition, the other end of the inner cylinder 121 is closed by the end plate 124 in the outer cylinder 122. The other end of the outer cylinder 122 is provided with a lid member 126 through the flange 125, and the other end of the outer cylinder 122 is substantially closed. In this way, a reinforcement chamber 181 having an annular cross section is formed in a portion of the double cylinder, and a main chamber 182 having a circular cross section is formed in a portion of the outer cylinder 122 only.

The lid member 126 is formed in a substantially cylindrical shape, and a rotational shaft 103 in a pipe shape is provided freely in the center of the shaft. Between the outer circumferential surface of the rotating shaft 103 and the inner circumferential surface of the lid member 126, a shaft sealing 133 is mounted therebetween, so that the dispersion tank 102 can be sealed.

The rotating shaft 103 is a pipe shape in which the hollow part 131 is formed in the center of the shaft, and is provided in the same shaft as the reinforcement chamber 181 and the main chamber 182. One end of the rotating shaft 103 is located in the main chamber 182, and the outer rotor 104 and the inner rotor 105 are provided. In addition, the other end of the rotary shaft 103 is located outside the dispersion tank 102, and a driving device is provided (not shown).

The outer rotor 104 is comprised by the disk-shaped holding part 141 and the cylindrical part 142. As shown in FIG. The open end of the outer rotor 104 is located in the reinforcement chamber 181, and the other end closed by the retainer 141 is located in the main chamber 182, and is rotated by the key 146 (see FIG. 103).

One end of the cylindrical portion 142 is located near the end plate 123 of the reinforcement chamber 181. Thereby, the reinforcement chamber 181 in which the cross section was formed in the annular shape is divided into two zones inside and outside, and is stirred efficiently.

In addition, in the cylindrical part 142 located in the main chamber 182, like the case of 1st Embodiment (FIGS. 1 and 2), the plurality of wings 144 are arranged in a cylindrical shape at regular intervals.

Therefore, when the outer rotor 104 is rotated in the direction of the arrow in the figure, centrifugal force is generated by the blade 144. Then, the processing liquid flows from the inside outward through the opening 145 between the wings 144. As a result, the processing liquid and the media 107 in the dispersion tank 102 form a circulation flow. That is, the outer side of the wing 144 flows from the other end side toward the one end side, and the open one end flows from the outside to the inward, and the inner side of the wing 144 from the other end side to the other end side. Flows towards.

In addition, by the rotation of the outer rotor 104, the processing liquid in the dispersion tank 102 is stirred together with the media 107. Then, the grinding and dispersing treatment is performed by the shear force generated between the inner wall of the dispersion tank 102 and the cylindrical portion 142. At the same time, the whole treatment liquid is well stirred by circulating inside and outside the outer rotor 104, and the whole treatment liquid is uniformly treated.

By providing the reinforcement chamber 181 with the dispersion tank 102, the performance of the grinding | pulverization and dispersion processing can be improved remarkably. This is because, because the cross section of the reinforcing chamber 181 is annular, both inner and outer sides of the outer rotor 104 are close to the inner wall of the dispersion tank 102, and thus a shearing force can be generated.

In order to further improve the grinding and dispersing performance, the outer rotor 104 is preferably provided with a plurality of projections 143 on the outer circumference of the cylindrical portion 142. The location where the projection 143 is provided may be provided at both the inner and outer circumferences of the tubular portion 142 or both the inner and outer circumferences. In addition, the projection is provided on the circumferential wall surface of the reinforcing chamber 181 (outer circumferential surface of the inner cylinder 121 or inner circumferential surface of the outer cylinder 122) facing the projection 143 provided on the cylindrical portion 142. It may be (not shown). Even in the case where the viscosity of the processing liquid increases due to fine pulverization, the media 107 can be efficiently stirred by providing such projections 143.

The inner rotor 105 is located inside the outer rotor 104 and has a cylindrical portion made up of a plurality of wings 154 arranged in a cylindrical shape at regular intervals on one surface of the disc-shaped holding portion 151 ( 152 is provided. The open end of the tubular portion 152 is fixed to the rotary shaft 103 by a bolt 153 in a state in which the open end of the tubular portion 152 is brought into close contact with one surface of the holding portion 141 of the outer rotor 104.

The outer circumferential surface of the wing 154 is located slightly away from the inner circumferential surface of the wing 144 of the outer rotor 104. As described above, the gap between the two wings serves as a flow path for the circulation flow formed inside and outside the outer rotor 104, and a flow is formed from one end side of the dispersion tank 102 to the other end side.

In addition, the inner circumferential surface of the blade 154 is located slightly away from the outer surface of the rotary shaft 103, and a space portion 156 is formed inside the blade 154. The opening 132 is provided in the position of the space part 156 in the rotating shaft 103, and the hollow part 131 communicates with the space part 156 in communication. As a result, the hollow part 131 of the rotating shaft 103 forms the discharge port 134 of a dispersion liquid. That is, the dispersion liquid which received the grinding | pulverization and dispersion process in the said circulation flow flows into the space part 156 via the opening 155 between the blade | wing 154, and is discharged | emitted from the discharge port 134.

When the inner rotor 105 rotates in the direction of the arrow shown in the drawing, like the outer rotor 104, the centrifugal force is generated by the blade 154. Therefore, the separation function and the classification function are exerted on the particles passing through the opening 155. That is, the particles or media 107 having a large particle diameter cannot enter the space portion 156, and only the fine particles are discharged through the space portion 156.

In addition, large particles and media 107 that could not flow into the space 156 are immediately returned to the circulation flow formed inside and outside the outer rotor 104. Then, the pulverization and dispersion treatment are performed again, so that the dispersion treatment and the classification treatment can be surely performed.

The inner rotor 105 is located inside the outer rotor 104, and the blades 154 and the blades 144 are positioned at substantially the same position with respect to the axial direction. As a result, large particles separated from the inner rotor 105 can be quickly returned to the circulation flow of the outer rotor 104.

In addition, the blade 144 is preferably provided at a position closer to one end of the dispersion tank 102 than the blade 154. Because, the gap between the outer circumferential surface of the wing 154 and the inner circumferential surface of the wing 144 is a flow path of the circulation flow, and forms a flow from one end side of the dispersion tank 102 to the other end side. Therefore, when the wing 144 is closer to one end of the dispersion tank 102 than the wing 154, the wing 144 is located upstream of the circulation flow, and the wing 154 is located downstream of the circulation flow. .

Therefore, after the upstream wing 144 has separated large particles in advance, the downstream wing 154 performs the final separation and classification, which is an efficient process.

The member that directly contacts the treatment liquid such as the dispersion tank 102, the outer rotor 104, and the inner rotor 105 is preferably made of a wear-resistant material, and ceramics such as alumina, alumina zirconia, and silicon carbide are used. It is desirable to. As a result, the incorporation of impurities into the product can be prevented.

The media stirring wet disperser 101 of the present invention can perform a strong stirring operation in a relatively narrow dispersion tank 102. Therefore, as shown in the figure, it is preferable to provide a cooling jacket 106 on the outside of the dispersion tank 102 to forcibly cool the dispersion tank 102. The cooling jacket 106 covers the whole of the dispersion tank 102 as much as possible, and installs the water supply port 161 and the drain port 162 in consideration that the cooling water does not flow in a biased manner. The jacket 106 enables temperature management of the workpiece. Moreover, it can also be used as a heating jacket for the initial stage of a process.

Example 1

Using the media stirring type wet dispersion machine of this invention shown in 1st Embodiment, the test which disperse | distributed the secondary aggregated titanium oxide on condition shown below was performed, and the performance was confirmed.

The slurry prepared in the holding tank was put into the supply port of a disperser by the metering pump, the circulation system which returns the slurry discharged | emitted from the discharge port of a disperser to a holding tank was formed, and the disperser was started and tested in this state.

After the disperser was started, samples were taken from the outlet of the disperser every predetermined time. The particle diameter was measured by laser diffraction and light scattering method using Nikkiso Micro Track MKIIDRA.

Treatment condition

Disperser: Disperser shown in Figs. 1 and 2, outer rotor outer diameter 120 mm

Motor: 3.7kw, maximum rpm 3600rpm

Media: Zirconia, diameter 0.03mm

         0.84 kg

Treated product: Titanium oxide MT-150W (made by taker)

         Primary particle diameter 15nm, secondary aggregate diameter 2.3㎛

         300g usage

Solvent: Water

       Usage 2700g

Concentration: 10wt%

Dispersant: Nof Cospas 44-c (Product Name), 7g

Throughput: 1 liter / minute

The rotation speed of both rotors was operated at 2070 rpm, and the dispersion liquid with an average particle diameter of 35.8 nm was obtained 90 minutes after the start of operation. No incorporation of media in the dispersion was seen.

[Example 2]

The rotation speed of both rotors was changed to 1600 rpm, and the other conditions were operated like Example 1. At 90 minutes after the start of operation, a dispersion having an average particle diameter of 24.1 nm was obtained. No incorporation of media in the dispersion was seen.

Next, using the media stirring type wet dispersion machine of this invention shown by 2nd Embodiment, the test which disperse | distributes said titanium oxide (average particle diameter 2.4 micrometers) on the conditions shown in Table 1 was performed, and the performance was confirmed It was.

The slurry prepared in the holding tank was put into the supply port of a disperser by the metering pump, the circulation system which returns the slurry discharged | emitted from the discharge port of a disperser to a holding tank was formed, and the disperser was started and tested in this state.

[Table 1]

Example 3 Example 4 Example 5 Disperser Disperser shown in Figs. 3 and 4
Outer rotor outer diameter 120mm  Process name Titanium oxide MT-150W (taker)  Throughput 300 g density 10wt% menstruum water Solvent 2700 g Dispersant Nop cospas 44-c Dispersant concentration 7g Rotation speed 1600 rpm 2640 rpm 2640 rpm Ball material Zirconia Ball diameter 0.03mm 0.05mm 0.1mm Ball filling rate 53.7% 29.3% 29.3% Throughput 1 L / min

After the disperser was started, a sample was taken from the holding tank every predetermined time. The particle diameter was measured by laser diffraction and light scattering method using Nikkiso Micro Track MKIIDRA.

[Example 3]

A zirconia ball with a particle diameter of 0.03 mm was used as the media, and this was filled with 53.7% of the volume of the dispersion tank, and the dispersion test was carried out with the rotation speed of the rotor at 1600 rpm. As a result, the average particle diameter of the processed material became 49.1 nm at 90 minutes from the start of operation, and no mixing of media was observed.

Example 4

A zirconia ball having a particle diameter of 0.05 mm was used as the medium, and this was filled with 29.3% of the volume of the dispersion tank, and the dispersion test was performed at a rotor speed of 2640 rpm. As a result, the average particle diameter of the processed material became 64.3 nm at 90 minutes from the start of operation, and no mixing of media was observed.

[Example 5]

A zirconia ball with a particle diameter of 0.10 mm was used as the medium, and this was filled with 29.3% of the volume of the dispersion tank, and the dispersion test was performed at a rotor speed of 2640 rpm. As a result, the average particle diameter of the processed material became 52.4 nm at 90 minutes from the start of operation, and no mixing of media was observed.

According to the present invention, the outer rotor is provided with the function of pulverizing and dispersing the solid particles. In addition, the inner rotor has a function of separating media and a classification function of fine particles.

In the dispersion tank, a circulation flow is circulated inside and outside the outer rotor, and the treatment liquid flows with the media. Then, particles are pulverized and dispersed in the course of this circulation. Further, the treatment liquid is classified in the inner rotor, only the fine particles are discharged through the inner rotor, and the large particles and the media are returned to the circulation flow again.

As a result, the disperser of the present invention works in combination with the grinding and dispersing function of the outer rotor and the separating and classifying function of the inner rotor. In addition, even when media having a diameter of 0.1 mm or less are used, stable continuous operation can be performed without causing troubles such as loading.

Therefore, it is possible to economically perform the dispersion | distribution process which makes particle diameter a nanometer order.

Claims (9)

A cylindrical dispersion tank closed at one end, A rotating shaft having a pipe shape freely rotatable through the other end side of the dispersion tank; A plurality of vanes arranged in a tubular shape, and fixed to the rotary shaft to rotate to generate centrifugal force, agitate the workpiece and media with the inner wall of the dispersion tank, and perform grinding and dispersing treatment, An outer rotor that uniformly treats the entire workpiece, It has a plurality of vanes which are located inside of the outer rotor and arranged in a cylindrical shape, and has an inner rotor which generates centrifugal force by being fixed to the rotating shaft to rotate, thereby separating the workpiece and the media, The dispersion tank is provided with a supply port for communicating in and out of the dispersion tank, And said pipe-shaped rotating shaft forms an outlet through the inside of said inner rotor. 2. The dispersion tank according to claim 1, wherein the dispersion tank is provided with a ring-shaped reinforcement chamber connected to one end side thereof in series. And one end of the outer rotor is located in the reinforcement chamber. The media stirring type wet dispersion machine according to claim 2, wherein the outer rotor positioned in the reinforcement chamber is provided with a plurality of protrusions on the outer circumferential portion. The plurality of vanes of the outer rotor is provided at a position closer to the one end of the dispersion tank than the plurality of vanes of the inner rotor. Media Stirred Wet Disperser. The media stirring type wet dispersion machine according to any one of claims 1 to 3, wherein the supply port is provided at the other end of the dispersion tank. The media stirring type wet dispersion machine according to any one of claims 1 to 3, wherein the dispersion tank includes a cooling jacket on an outer side thereof. The media stirring type wet dispersion machine according to claim 4, wherein the supply port is provided at the other end of the dispersion tank. 5. The media stirring type wet dispersion machine according to claim 4, wherein the dispersion tank has a cooling jacket on the outside thereof. The media stirring type wet dispersion machine according to claim 5, wherein the dispersion tank is provided with a cooling jacket on an outer side thereof.

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