JP2011189311A - Raw material particle miniaturization apparatus and method for producing miniaturized particle-containing material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a raw material particle miniaturization apparatus for easily and continuously miniaturizing particles and a method for producing a miniaturized particle-containing material. <P>SOLUTION: The raw material particle miniaturization apparatus 1 has a rotary body 2 having a plurality of recessed parts 3 just like circles and a jetting part 4 for jetting a mixed liquid of raw material particles and a liquid toward the recessed parts 3 of the rotary body 2. The recessed parts 3 have recessed faces 33 dented in the rotation direction R of the rotary body 2 and the recessed faces 33 are continuous through cutout parts 31 and the mixed liquid jetted from the jetting part 4 is successively supplied to the respective recessed faces 33 along with the rotation of the rotary body 2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a technique for producing fine particles from a mixture of particles and liquid.

  As a device for refining raw material particles, a ball mill as shown in Patent Document 1 is known. A ball mill is a device that pulverizes and refines raw material particles by putting a hard drum such as ceramic or metal together with raw material particles to be pulverized into a cylindrical drum and rotating the drums so that the hard balls collide with each other. .

  On the other hand, Patent Document 2 discloses a high-speed stirring device that mixes and stirs liquid and raw material particles to atomize and emulsify and disperse components. This high-speed stirring device includes a cylindrical stirring tank having irregularities formed on the inner peripheral surface, an outer layer connected with a water cooling pipe for supplying and discharging cooling water to the outer peripheral surface including the bottom surface of the stirring tank, and a stirring tank. A rotating blade that can be rotated at high speed concentrically with the agitation tank with a slight gap from the inner peripheral surface of the shaft, a shaft that can be driven forward and reverse at high speed by supporting this rotating blade at the end, and a weir plate The upper container having a discharge pipe for discharging the product provided at the upper part of the stirring tank and a lid for sealing the upper container are provided, and the flow of the liquid to be treated is disturbed by the unevenness provided on the inner surface of the stirring tank. To further increase the stirring action.

However, the ball mill is a rough method for homogenizing minute raw material particles, and it is necessary to provide a separate filter. Moreover, there is a problem that it is difficult to make finer raw material particles. Moreover, in the technique of patent document 1, it is necessary to cool the heat which generate | occur | produces in the case of stirring, and there exists a problem that an apparatus becomes excessive.

Japanese Patent No. 2737789 JP 2007-125454 A

  In view of this, the present inventor has disclosed an apparatus that separates and aggregates raw material particles easily and continuously and finely divides raw material particles having a large particle size and easily and continuously refines them (non-) Known Japanese Patent Application No. 2009-204318). This device includes a rotating body that is provided with teeth on the outer edge and rotates, and a nozzle that injects a mixture of raw material particles and liquid toward the approaching tooth of the rotating body, and the mixed liquid is applied to the teeth of the rotating body. The raw material particles dispersed in the liquid are made fine by colliding.

  An object of this invention is to provide the raw material particle | grain refiner | miniaturization apparatus which can refine | pulverize a particle | grain continuously more easily, and the manufacturing method of a refined particle containing material.

  The present inventors have found that by appropriately adjusting the shape of the rotating body and the injection direction of the mixed liquid, the mixed liquid is sequentially supplied to the recesses, and a strong force can be applied to the mixed liquid in the recesses. It came to complete. Specifically, the present invention provides the following.

(1) a rotating body in which a plurality of recesses are arranged circumferentially, and an injection unit that injects a mixture of raw material particles and liquid toward the recesses of the rotating body,
The concave portion has a concave surface that is recessed with respect to the rotational direction of the rotating body,
The concave surfaces are continuous through a notch,
A raw material particle refining apparatus in which the liquid mixture sprayed from the spraying means is sequentially supplied to each of the concave surfaces as the rotating body rotates.

  (2) The raw material particle refining apparatus according to (1), wherein the plurality of recesses are provided on a circumferential surface of the rotating body.

  (3) The raw material particle refinement apparatus according to (1) or (2), wherein the plurality of recesses are provided on a side surface of the rotating body.

  (4) The raw material particle refiner according to any one of (1) to (3), wherein the rotating body includes a plurality of blades provided radially.

  (5) The raw material particle refining apparatus according to any one of (1) to (4), further including a collecting body that surrounds the rotating body and has a lead-out port portion through which the fine particles discharged from the concave portion are led out.

  (6) The raw material particle refining device according to (5), wherein the outlet port portion is located on a rotation axis of the rotating body.

  (7) The raw material particle refining apparatus according to (5) or (6), wherein the collector has an exhaust port portion communicating with the outside in addition to the outlet port portion.

  (8) The raw material particle refining device according to (7), further comprising an intake means for sucking the inside air of the collector through an exhaust port.

(9) Using the raw material particle refining device according to any one of (1) to (8),
The manufacturing method of the refined particle containing material which has the process of injecting the liquid mixture of a raw material particle and a liquid toward the said recessed part, and collect | recovering the refined particles discharged | emitted from the recessed part.

  According to the present invention, since the concave portion has a concave surface that is recessed with respect to the rotation direction of the rotating body, the liquid mixture supplied into the concave portion flows under the centrifugal force due to the rotation of the rotating body, and the particles are refined. The In addition, while the concave surface to which the liquid mixture is supplied changes with the rotation of the rotating body, the liquid mixture is smoothly supplied to the concave surface by passing through the portion notched by the notch portion, Particles that are not supplied and remain insufficiently refined are difficult to produce. Thereby, particle | grains can be continuously refined more easily.

It is a top view and explanatory drawing of a raw material particle refining device concerning one embodiment of the present invention. It is the sectional view on the AA line of the raw material particle | grain refiner | miniaturization apparatus of FIG. It is a figure which shows the supply state of the liquid mixture to the recessed part which the raw material particle | grain refiner | miniaturization apparatus of FIG. 1 has. It is explanatory drawing of the raw material particle refinement | miniaturization apparatus which concerns on 2nd Embodiment of this invention. It is explanatory drawing of the raw material particle refinement | miniaturization apparatus which concerns on 3rd Embodiment of this invention. It is explanatory drawing of the raw material particle | grain refiner | miniaturization apparatus which concerns on 4th Embodiment of this invention. It is a figure which shows the supply state of the liquid mixture to the recessed part which the raw material particle | grain refiner | miniaturization apparatus of FIG. 6 has.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in description of each embodiment other than 1st Embodiment, the same code | symbol is attached | subjected about what is common in 1st Embodiment, and the description is abbreviate | omitted.

  FIG. 1 is a plan view and an explanatory view of a raw material particle refining apparatus 1 according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the raw material particle refining apparatus 1 taken along line AA. The raw material particle refining device 1 includes a rotating body 2 and an injection unit 4 as injection means. FIG. 3 is a diagram illustrating a supply state of the mixed liquid to the recess 3 included in the raw material particle refining device 1.

  The rotating body 2 is a disk-shaped member, and a rotating shaft 15 is provided orthogonally at the center thereof. The rotating shaft 15 is connected to a rotating motor 10 as a driving source, and is rotated by a driving force of the rotating motor 10, and the rotating body 2 is rotated in the rotation direction R by this rotation.

  The rotating body 2 has a plurality of recesses 3 arranged in a circumferential shape. Among these recesses 3, the rotating body 2 rotates and comes to a predetermined position with respect to the injection unit 4. And a liquid mixture is supplied. At this time, the raw material powder is refined by the impact of the collision with the recess 3.

  Here, the injection unit 4 is provided at a predetermined location with respect to the rotating body 2 and injects the liquid mixture toward the concave portion 3 of the rotating body 2. Although the four injection parts 4 in this embodiment are provided, it is not restricted to this, The number of single or several arbitrary may be sufficient. However, when a plurality of injection units 4 are provided, the positional relationship (that is, distance and angle) between the injection units 4 and the recesses 3 is the same so that the obtained fine particles are uniform. It is desirable to arrange in. The specific configuration of the injection unit 4 is not particularly limited as long as the injection direction is defined, and may be a conventionally known one.

  The raw material particles are inorganic powders such as electrode materials for lithium ion batteries. In some cases, the plurality of particles 6 constituting the raw material particles are aggregated to increase the particle diameter. In order to make the particle diameter uniform, the aggregated raw material particles need to be separated and refined. In addition, there are cases where the particles constituting the raw material particles have a large particle diameter, and it is necessary to divide the particles to make them finer. Thus, the raw material particles targeted by the raw material particle refining apparatus 1 are not particularly limited as long as the raw material particles need to be refined to make the particle size distribution uniform.

  The liquid is a polymer made of resin, water, a solvent, or the like. This liquid has a role of connecting the raw material particles, and may contain a dispersing agent that promotes dispersion of the powder, for example, a so-called three-phase emulsifier (see Japanese Patent No. 3855203), an anti-tacking agent, and the like.

  The raw material particles may be oily and the liquid may be water. In this case, the oily substance that is the raw material particles contained in the mixed solution is refined by the raw material particle refining device 1 and emulsified. As another example, the mixed liquid may be a hybrid polymer composed of acrylic and urethane.

  The concave portion 3 in the present invention has a concave surface 33 that is recessed with respect to the rotation direction R. For this reason, the liquid mixture in the concave portion 30 is loaded with a force while rotating around the concave surface 33 due to the synergistic effect of the injection force and the centrifugal force. Thereby, the raw material particles are further refined and discharged from the recess 3. The shape of the concave surface 33 is not particularly limited, but the cross section along the injection direction is preferably an arc shape so that centrifugal force is efficiently loaded. In order to prevent the mixed liquid from being discharged without rotating around the concave surface 33, it is preferable that the side wall 21 is provided upright on the side of the concave surface 33.

  The plurality of recesses 3 may be provided at any location as long as they are arranged in a circumferential shape (that is, a substantially equal distance from the rotation shaft 15). The plurality of recesses 3 of the present embodiment are provided on the circumferential surface of the rotating body 2 (that is, the surface on which the rotation shaft 15 is provided and the surface that is not the back surface thereof). However, it is not restricted to this, You may provide in the side surface (namely, the surface in which the rotating shaft 15 is provided, and its back surface) as mentioned later.

  Here, the depressed concave surfaces 33 must be provided apart from each other (because the concave surfaces communicate with each other). However, while the mixed liquid jet flows from one concave surface to the next concave surface, the mixed liquid becomes concave. There is a concern that it will not be supplied and will be recovered with insufficient miniaturization.

  However, in the present invention, as shown in FIG. 3, the plurality of concave surfaces 33 are cut out along the injection direction (left direction in FIG. 3) at the position where the mixed liquid is supplied from the injection unit 4. It continues through the notch 31. As a result, while the liquid mixture is supplied from the concave surface 33a to the concave surface 33b as the rotating body 2 rotates, the liquid mixture passes smoothly through the part cut out by the cutout part 31b. Since it is supplied to the concave surface 33b, it is difficult to produce particles that are not supplied into the concave surface 33 and remain insufficiently refined. Thereby, particle | grains can be continuously refined more easily.

  Note that if the notch angle Θ of the notch 31 from the circumferential surface is too small, supply of the mixed liquid to the concave surface tends to be hindered, whereas if too large, the length of the concave surface 33 is limited, and the particle Miniaturization tends to be inefficient. Therefore, the cutout portion is preferably substantially parallel to the injection direction, and the cutout angle Θ is preferably −15 ° to 15 °, more preferably 5 ° or less.

  The raw material particle refining device 1 further includes a collecting body 14 surrounding the rotating body 2, and the collecting body 14 has a lead-out port 16 through which the fine particles discharged from the recess 3 are led out. The recovery container 8 is connected to the outlet 16, and the fine particles collected by the collector 14 are guided to the recovery container 8 through the outlet 16. The collector 14 in the present embodiment has a conical shape that is reduced in diameter toward the outlet port 16, whereby the movement of the fine particles to the outlet port 16 is induced, and the retention in the collector 14 is prevented. Can be suppressed.

  The outlet 16 is preferably located on the rotating shaft 15 of the rotating body 2 (that is, on the extended line of the rotating shaft) in terms of facilitating the derivation of fine particles. Here, that the outlet 16 is located on the rotation axis means that at least a part of the opening (preferably the center of the opening) formed by the outlet 16 is on an extension line of the rotation axis.

  In addition to the outlet 16, the collector 14 preferably has an exhaust port 19 that communicates with the outside. Thereby, it can accelerate | stimulate that the gas contained in a liquid mixture isolate | separates from a liquid mixture. From the viewpoint of gas discharge efficiency, the position of the exhaust port portion 19 is preferably a peripheral edge as in the present embodiment, more specifically, above the rotating body 2 and at the peripheral edge.

  The gas contained in the mixed liquid is composed of two gases, that is, the gas contained in the liquid and the gas contained in the raw material particles (that is, the gas sandwiched between the fine particles). While the gas is released relatively easily, the latter gas is difficult to release. Therefore, the raw material particle refining device 1 according to the present invention preferably includes an intake means (not shown) that sucks the inside air of the collector 14 through the exhaust port 19. Thereby, detachment | desorption of the gas contained in raw material particle | grains is accelerated | stimulated, and refinement | miniaturization can be promoted more. When an eddy current is formed in the gas in the collector 14 as in the embodiment shown in FIG. 4 or 5 to be described later, the object 5 having a large specific gravity is separated in the center and the gas having a small specific gravity is separated outward. The It is preferable that the exhaust port 19 is located above the rotator 2 and at the periphery in that the airflow for sucking the gas does not inhibit the vortex. The specific configuration of the intake means may be a conventionally known vacuum pump or the like, and the description thereof is omitted.

  In the collection container 8, an object to be processed 5 containing the refined particles 6 and the liquid 7 is accommodated. When the refining of particles by the raw material particle refining device 1 is completed, the workpiece 5 is discharged from the take-out port 17 of the collection container 8. When the particles are refined again, the workpiece 5 is supplied to the injection unit 4 through the supply pipe 18. The supply pipe 18 is provided with a pump 12 and a valve 13, and the supply amount of the workpiece 5 is adjusted.

  FIG. 4 is an explanatory view of a raw material particle refining device according to the second embodiment of the present invention. As shown in FIG. 4, the rotating body 2 </ b> A according to the present invention preferably includes a plurality of blades 23 provided radially. The blades 23 rotate with the rotation of the rotating body 2A, and a gas vortex in the collector 14 is formed. Thereby, since the fine particle discharged | emitted from the recessed part 3 is induced | guided | derived to the outlet port part 16 on a vortex | eddy_current, the residence in the collection body 14 can be suppressed more reliably. Further, by providing the blades 23 on the rotating body 2A, a driving source unique to the blades 23 is unnecessary, and thus the structure can be simplified. In addition, the specific structure of the some blade | wing 23 is the same as that of a conventionally well-known electric fan etc., A number, arrangement | positioning, an inclination angle, a shape, etc. may be set suitably.

  Moreover, although it provided in the other side of the outlet port part 16 in FIG. 4, it is not restricted to this, The same side may be sufficient. FIG. 5 is an explanatory view of a raw material particle refining device according to the third embodiment of the present invention, and the blades 23B shown in FIG. 5 are provided on the same side as the outlet port portion 16. In order to prevent the fine particles from accumulating on the blades 23B, the blades 23B are preferably inclined downward in the lead-out port 16 side, in this embodiment.

  FIG. 6 is an explanatory view of a raw material particle refining apparatus according to a fourth embodiment of the present invention, and FIG. 7 is a view showing a supply state of a mixed liquid to a recess of the raw material particle refining apparatus of FIG. The recess 3C in the present embodiment is provided circumferentially on the side surface of the rotating body 2C (that is, the surface on which the rotation shaft 15 is provided and the back surface thereof), and the injection unit 4 corresponds to the position of the recess 3C. Is provided. Also in this aspect, as shown in FIG. 7, the mixed liquid injected from the injection unit 4 is continuously supplied to the concave surfaces 33aC and 33bC continuously by the part cut out by the cutout part 31C, and also in the rotation direction. Centrifugal force accompanying rotation of the rotating body 2C to R is loaded on the particles in the recess 3C. For this reason, it is possible to finer the particles more easily and continuously.

  In addition, the recessed part and concave surface in this invention are relative expressions, and as long as a rotary body has the above shape, the manufacturing process is not specifically limited. That is, the concave portion or the concave surface may be formed directly by making a recess, but is not limited thereto, and may be indirectly formed by providing a convex portion around the periphery.

  The present invention uses the above raw material particle refining apparatus to produce a fine particle-containing material having a step of injecting a mixture of raw material particles and a liquid toward a concave portion and collecting the fine particles discharged from the concave portion. A method is also provided.

  The present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.

DESCRIPTION OF SYMBOLS 1 Raw material particle refiner 2 Rotating body 21 Side wall 23 Blade 3 Recessed part 31 Notch part 33 Concave surface 4 Injection | pouring part (injection means)
DESCRIPTION OF SYMBOLS 5 To-be-processed object 6 Particle | grains 7 Liquid 8 Collection | recovery container 10 Rotation motor 12 Pump 13 Valve 14 Collecting body 15 Rotating shaft 16 Outlet part 17 Extraction port 18 Supply piping 19 Exhaust part

Claims (9)

A rotating body in which a plurality of recesses are arranged circumferentially, and an injection means for injecting a mixture of raw material particles and liquid toward the recesses of the rotating body,
The concave portion has a concave surface that is recessed with respect to the rotational direction of the rotating body,
The concave surfaces are continuous through a notch,
A raw material particle refining apparatus in which the liquid mixture sprayed from the spraying means is sequentially supplied to each of the recesses as the rotating body rotates.   The raw material particle refining device according to claim 1, wherein the plurality of concave portions are provided on a circumferential surface of the rotating body.   The raw material particle refining apparatus according to claim 1, wherein the plurality of recesses are provided on a side surface of the rotating body.   The said rotary body is a raw material particle | grain refiner | miniaturization apparatus in any one of Claim 1 to 3 provided with the several blade | wing provided radially.   The raw material particle | grain refiner | miniaturization apparatus in any one of Claim 1 to 4 further equipped with the collection body which has the derivation | leading-out part which surrounds the said rotary body and the refined particle discharged | emitted from the said recessed part is derived | led-out.   The raw material particle refining device according to claim 5, wherein the outlet port portion is located on a rotation axis of the rotating body.   The raw material particle refining device according to claim 5 or 6, wherein the collector has an exhaust port portion communicating with the outside in addition to the outlet port portion.   The raw material particle refining device according to claim 7, further comprising an intake means for sucking the inside air of the collector through an exhaust port. Using the raw material particle refining device according to any one of claims 1 to 8,
The manufacturing method of the refined particle containing material which has the process of injecting the liquid mixture of a raw material particle and a liquid toward the said recessed part, and collect | recovering the refined particles discharged | emitted from the recessed part.

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