WO2006112164A1

WO2006112164A1 - Material slurry processing device

Info

Publication number: WO2006112164A1
Application number: PCT/JP2006/303970
Authority: WO
Inventors: Mitsugi Inkyo
Original assignee: Kotobuki Eng. & Mfg.Co., Ltd.
Priority date: 2005-04-01
Filing date: 2006-03-02
Publication date: 2006-10-26
Also published as: JPWO2006112164A1

Abstract

A material slurry processing device comprising a mill for feeding material slurry to a casing (6) filled with a media and stirring and mixing the media and the material slurry by a rotor (11). A shaft (9) to which the rotor (11) is fixed is supported below the casing while being projected to below the casing, and the slurry from which the media is separated by centrifugal action of a separator (12), which is secured to that part of the shaft (9) that is above the rotor, passes through the shaft hole (14) of the shaft (9) and then discharged, as it is, into a container (1) from an outlet (14b) at the lower end of the shaft. Stirring blades (16) for stirring the slurry in the container are fixed to the lower end of the shaft.

Description

Specification

Raw material slurry processing equipment

Technical field

[0001] The present invention relates to a wet stirring ball mill used to finely pulverize and disperse metals, inorganic or organic substances in the fields of pigments, inks, paints, pharmaceuticals, ceramics, and the like. And a rotor of a type comprising a pin, a disk or an axially extending blade disposed in the casing and driven to rotate by a motor. In the casing, zirconia, silica, anolemina, glass beads, titanium oxide, In a state filled with media such as steel balls and silinosilicate, the raw material slurry in the raw material tank is supplied into the casing by a pump, and the rotor is driven to rotate to stir and mix the media and slurry. The raw material particles are pulverized and / or the aggregates of the raw material particles in the slurry are dispersed (hereinafter referred to as Relates slurry processing apparatus having a grinding and or wet stirred ball mill to) that dispersed.

Background art

FIG. 2 shows an overall configuration of a raw material slurry processing apparatus provided with this conventional wet stirring ball mill 21 disclosed in the following Patent Document 1, and the raw material from a raw material tank 22 with a jacket for storing slurry. The slurry is supplied to the wet stirring ball mill 21 by the pump 23.

, After being crushed and or dispersed by being stirred with media the mill 21, to separate the media in the separator ₂₄ is discharged through the axial hole ₂₆ of the shaft ₂ 5, as returned to the raw material tank 22 Usually, this cycle is repeated.

[0003] The Minore 21 is a vertically-oriented cylinder, and has a casing 28 provided with a jacket 27 through which cooling water for mill cooling is passed on the outer periphery, and a shaft that is rotatably positioned at the axial center of the casing 28. A rotor 25 that is supported by an electric motor 29 and rotated by a belt electric device 31 through a belt electric device 31 and a pin that protrudes in a radial direction from the shaft 25 in the casing. The rotor 32 agitates media and slurry. And a separator 24 for separating media fixed to the shaft 25 above the rotor, and a raw material slurry provided at the bottom of the casing so as to oppose the shaft end of the shaft 25. A shaft hole 26 is formed in the shaft 25 from the inlet 34 at the upper part of the casing to the outlet 35 at the upper end.

[0004] The separator 24 is composed of a pair of discs 37 that are fixed to the shaft 25 with an inlet 34 interposed therebetween, and a blade 38 that couples the discs 37 to form an impeller. The centrifugal force is applied to the media and slurry that have rotated into the disk by rotating with 25, and the medium with high specific gravity is blown outward in the radial direction, while the slurry with low specific gravity passes through the shaft hole 26 from the inlet 34 of the shaft 25. It has come to be discharged. In the figure, 39 is a shaft seal device such as a mechanical seal provided in a bearing portion that supports the shaft 25 at the upper part of the casing. This shaft seal device 39 is a fixed discharge pipe connected to the shaft 25. It is also provided at the connecting portion between 41 and the shaft 25.

Patent Document 1: W096 / 39251

Disclosure of the invention

Problems to be solved by the invention

[0005] The first object of the present invention is to improve the conventional raw material slurry processing apparatus described above and to simplify the structure by reducing the shaft seal device of the wet stirring ball mill, and a tank for storing slurry. The second purpose is to simplify the structure of the equipment by stirring the slurry in the shaft using the rotational drive of the shaft installed at the center of the mill.

Means for solving the problem

[0006] A raw material slurry processing apparatus according to the present invention includes a wet-stirred ball mill that pulverizes and / or disperses raw material slurry, and the wet-stirred ball mill has a vertically-structured cylindrical casing, and the casing includes A slurry supply port provided, a shaft positioned at a shaft center of the casing and supported by a bearing portion at a lower portion of the casing and projecting downward from the casing, and a mechanical seal and a ground packing provided in the bearing portion, for example. A shaft sealing device such as a drive device for rotating the shaft, a rotor fixed to the shaft in the casing, the medium filled in the casing and the slurry supplied from the supply port, and the inside of the casing It is fixed to the shaft of the shaft and rotates together with the shaft. A separator in-Perataipu separating larger media heavy, is formed on the axis of the shaft, inlet to the separator While having an opening, the outlet has an axial hole opening at the lower end of the shaft. The slurry in which the raw material particles are powdered and / or dispersed by the wet stirring ball mill is discharged from the outlet of the shaft hole into the container as it is.

[0007] According to the present invention, the slurry that does not need to be connected to a fixed discharge pipe at the lower end of the shaft is discharged as it is from the outlet at the lower end of the shaft into the container, and there is no need to consider leakage. Unlike the device, it is not necessary to provide a shaft seal device at the connection between the fixed discharge pipe and the shaft. If the discharge pipe from the shaft to the container and the shaft seal device are omitted, the structure becomes simpler and the path through which the slurry circulates can be shortened. If the path is long, the amount of slurry adhering to the path also increases, and the amount of product slurry obtained is reduced accordingly.If the path length can be shortened, the ratio of the product slurry to the supplied raw material slurry increases and the yield improves. To do. When a small amount of slurry is pulverized and dispersed as in laboratory equipment, the amount of slurry adhering to the path does not change regardless of the amount of product slurry. The yield of product slurry is improved by shortening the path length. Therefore, the present invention is suitable for a small processing apparatus for obtaining a small amount of product slurry.

[0008] In the present invention, the inlet of the shaft hole of the shaft is located above the medium filled in the casing, in other words, the medium in the casing is filled below the inlet of the shaft hole of the shaft. Is desired. This is because the media sinks to the lower part of the casing when the mill stops, and when the media reaches the level of the shaft hole inlet of the shaft, it is discharged from the inlet through the shaft hole.

[0009] The slurry supply port may be provided in the upper part of the casing, but is preferably provided in the lower part of the casing. By providing the supply port at the lower part of the casing, the slurry supplied after stirring is separated by the separator and discharged from the shaft inlet, and the supplied slurry is discharged from the inlet with little stirring. This can prevent short passes.

[0010] The rotor that stirs the slurry is a force including a pin and a disk. In a preferred embodiment, the rotor is of a type including a blade or a pin extending in the axial direction. By making the rotor into a type comprising blades extending in the axial direction, the rotor can be separated together with stirring. Similar to the lator, the media can be separated from the slurry by applying centrifugal force to the slurry.

[0011] The container used in the present invention may be a raw material tank, a product tank, or any other container. When grinding and / or dispersion is repeated and the slurry is circulated between the mill and a container other than the raw material tank and product tank, the slurry discharged to the container is once sent to the raw material tank and supplied from the raw material tank including a pump. Although it may be supplied to the supply port by means, it is preferably supplied directly to the supply port by a pump without going through the raw material tank. Compared with the case where the slurry is temporarily stored in the raw material tank and then supplied to the supply port, the path length of the slurry can be further shortened, and the yield improvement of the product slurry can be further increased.

In another invention, a stirring blade for stirring the slurry in the container is provided at the lower end of the shaft.

According to the present invention, the configuration of the apparatus can be simplified as compared with the case where a separate stirring apparatus using a motor as a drive source is provided.

Brief Description of Drawings

FIG. 1 is a schematic diagram of a raw slurry processing apparatus according to the present invention.

FIG. 2 is a schematic diagram of a conventional raw material slurry processing apparatus.

Explanation of symbols

1 'container

2 'pump

3 'Wet stirring ball mill

5 'jacket

6 'casing

7 'Electric motor

8 'Benoleto transmission

9 'shaft

11 • Rotor

12 • · Separator

13 ··· Supply port 14 · · Shaft hole

14a '' population

14b '' Exit

15 · · Mechanical seal

16

17 · · Container

BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 shows the overall configuration of a raw material slurry processing apparatus according to the present invention. The raw material slurry in a container 1 is supplied to a wet stirring ball mill 3 by a pump 2 and stirred together with media in the minole 3. After that, the route discharged into the container 1 is circulated as a cycle.

[0016] The mill 3 has a longitudinally cylindrical shape with a small capacity, a casing 6 provided with a jacket 5 through which cooling water for cooling the mill is passed on the outer periphery, and a shaft rotatably supported on the axis of the casing 6 The shaft 9 is rotated by a drive device, for example, an electric motor 7 via a belt transmission device 8 or a gear transmission shown in the figure, and is fixed to the shaft 9 in the casing with a certain interval in the axial and circumferential directions. A pin-shaped rotor 11, a separator 12 fixed to the upper end of the shaft on the upper side of the rotor, and a feed port 13 of raw material slurry provided on the bottom of the casing. 14 is formed, and the upper end of the shaft hole is an inlet 14a that opens to the peripheral surface, and the lower end that protrudes from the casing 6 is an outlet 14b.

[0017] Like the conventional separator 24 described above, the separator 12 is composed of a pair of disks 12a fixed to the shaft 9 with an inlet 14a interposed therebetween at a fixed interval, and a blade 12b connecting the disks 12a. The impeller is configured, centrifugal force is applied to the media and slurry that rotate with the shaft 9 and enters between the disks, the media is separated by the difference in specific gravity, and the slurry is passed through the shaft hole 14 from the inlet 14a of the shaft 9, It is discharged from the outlet 14b below the casing. In the figure, reference numeral 15 denotes a mechanical seal as a shaft seal device provided at a bearing portion for bearing the shaft 9 at the lower part of the casing.

[0018] A stirring blade 16 is attached to the lower end of the shaft protruding from the casing, and is housed in a funnel-shaped container 1 having a jacket 17 through which cooling water is passed. And from exit 14b The slurry discharged and stored in the container 1 is stirred and mixed by a stirring blade 16 that rotates together with a shaft 9, and is directly supplied to a supply port 13 by a pump 2.

In the slurry processing apparatus of the present embodiment, the slurry in the container is directly supplied to the supply port 13 by the pump 2, but as a container like the conventional processing apparatus shown in FIG. Use a raw material tank, repeat the cycle of circulating the slurry between the mill and the raw material tank, or install a separate raw material tank with a stirrer separately from the container, and pump the slurry from the container to the raw material tank You may make it supply to a supply port after returning. In the latter case, the stirring blade at the lower end of the shaft can be omitted.

In the slurry processing apparatus of the above embodiment, the slurry is also circulated between the mill and the container. However, in another embodiment, a raw material tank for storing the raw slurry and a product slurry are stored. A separate product tank is provided, and the raw material slurry supplied from the raw material tank is stirred and pulverized and / or dispersed in a mill, then discharged into a container, and then discharged from the product tank or directly into the product tank from the mill. Milling and / or dispersion in the mill is performed in one pass at a time.

[0021] In still another embodiment, a plurality of, for example, two tanks for storing the slurry are provided, and the slurry supplied from the first tank is stirred and pulverized and / or dispersed by a mill, and then the second tank is filled. The cycle in which the slurry is discharged and the slurry supplied from this tank is further stirred by a mill to be dusted and / or dispersed and returned to the first tank is repeated.

Claims

The scope of the claims

[1] A wet-stirred ball mill that pulverizes and / or disperses the raw slurry and a container that receives the slurry discharged from the wet-stirred ball mill, and the wet-stirred ball mill has a vertically-structured cylindrical casing. A supply port that is provided in the casing and to which slurry is supplied from the container; a shaft that is positioned at the axial center of the casing and is supported by a bearing portion at a lower portion of the casing and protrudes downward from the casing; A shaft seal device provided in the bearing portion, a drive device for rotationally driving the shaft, a rotor fixed to the shaft in the casing and filled in the casing, and a rotor for stirring the slurry supplied from the supply port, The slurry is fixed to the shaft inside the casing and rotates together with the shaft. A separator Investor Rataipu separating larger media, is formed on the axis of the shaft, while the inlet is open mouth to the separator, slurry processing device having a shaft hole in which an outlet is opened to the shaft bottom.

2. The raw material slurry processing apparatus according to claim 1, wherein the rotor comprises a blade extending in the axial direction.

[3] The raw material slurry processing apparatus according to claim 1 or 2, wherein the container is a container other than the raw material tank or the product tank, and a pump for directly supplying the slurry in the container to the supply port is provided. .

[4] The raw slurry processing apparatus according to any one of claims 1 to 3, wherein a stirring blade for stirring the slurry in the container is provided at a lower end of the shaft.