CN210675445U

CN210675445U - Fine grinding device for aluminum oxide material

Info

Publication number: CN210675445U
Application number: CN201920800598.0U
Authority: CN
Inventors: 牛鑫; 杨军强; 王艳平
Original assignee: Jiyuan Jinzhou Fine Ceramic Material Co Ltd
Current assignee: Jiyuan Jinzhou Fine Ceramic Material Co Ltd
Priority date: 2019-05-30
Filing date: 2019-05-30
Publication date: 2020-06-05
Anticipated expiration: 2029-05-30

Abstract

The utility model provides a meticulous grinder of aluminium oxide material, the power distribution box comprises a box body, the hopper, be equipped with the grinding case in the box, the discharge gate and the grinding case intercommunication of hopper, it is equipped with the ultrasonic grinding mechanism that is located the box to grind the case top, the bottom of grinding the case is the screen cloth structure, still be equipped with the grinding vessel that is located grinding case below in the box, fixed inner tube and urceolus of being equipped with in proper order by centre of a circle to periphery in the grinding vessel, material flow passageway and inner tube intercommunication, the one side that the inner tube deviates from material flow passageway is equipped with the carousel, carousel coaxial coupling has the pivot, it is equipped with along the interior grinding roller set and the outer grinding roller set of the radial interval distribution of carousel to rotate on the carousel, interior grinding roller set and outer grinding. The technical scheme combines wet ultrasonic grinding and roller grinding, so that the particle size distribution of the material is more uniform, the whole process does not involve grinding media, and the method has the advantages of multistage grinding, less impurities in the obtained product, high purity and uniform particle size.

Description

Fine grinding device for aluminum oxide material

Technical Field

The utility model belongs to the technical field of the grinding and specifically relates to a meticulous grinder of aluminium oxide material.

Background

Ultrafine powders generally refer to particles having a size between that of molecules, atoms and macroscopic objects, and a particle size in the range of 1-100 nanometers. Alumina micropowder exhibits high hardness and strength due to a reduction in particle size, and is widely used in the fields of ceramics, glass, refractories, and abrasives. In order to prepare high-purity ultrafine powder, a physical grinding mode is usually adopted besides a chemical means, grinding balls are very important grinding media, but the grinding balls with better wear resistance cannot be abraded, and the two worn parts can fall into materials to cause pollution, so manufacturers can select the grinding balls which are the same as or similar to the materials, and most of the alumina grinding balls with better wear resistance are imported from Japan and are expensive.

SUMMERY OF THE UTILITY MODEL

Aiming at the situation, in order to overcome the defects of the prior art, the utility model aims to provide a fine grinding device for alumina materials, which does not need grinding balls as media and prepares high-purity alumina powder.

The fine grinding device for the alumina materials comprises a box body and a hopper, wherein a discharge port of the hopper extends into the box body and is fixedly connected with the box body, and the fine grinding device is characterized in that a grinding box is arranged in the box body, the discharge port of the hopper is communicated with the grinding box, a water inlet pipe is fixedly connected to the grinding box, an ultrasonic grinding mechanism positioned in the box body is arranged above the grinding box, the bottom of the grinding box is of a screen structure, the lower part of the grinding box is communicated with a material flowing channel through the screen structure, a grinding cylinder positioned below the grinding box is further arranged in the box body, an inner cylinder and an outer cylinder are sequentially and fixedly arranged in the grinding cylinder from the circle center to the periphery, the material flowing channel is communicated with the inner cylinder, a turntable is arranged on one side of the inner cylinder, which is far away from the material flowing channel, the turntable is coaxially connected with a rotating shaft, one end of the rotating shaft, the inner grinding roller group extends into the inner barrel and is close to the inner barrel, the outer grinding roller group extends into the space between the inner barrel and the outer barrel and is close to the outer barrel, the inner grinding roller group and the outer grinding roller group respectively comprise a plurality of grinding rollers which are uniformly distributed along the circumferential direction of the rotary table, and an opening is arranged below the grinding barrel.

Preferably, the ultrasonic grinding mechanism comprises a low-speed motor, a fixing block, a sleeve and an ultrasonic vibrator, wherein the fixing block is located in the box body and eccentrically connected with the low-speed motor outside the box body, a sliding ring is further mounted on the low-speed motor, the ultrasonic vibrator is connected with the sliding ring through a lead, the ultrasonic vibrator is fixedly connected with the sleeve, and the sleeve is in threaded connection with the fixing block.

Preferably, wear-resistant coatings are arranged on the inner cylinder and the outer cylinder, coarse screens are uniformly distributed on the inner cylinder at intervals, and fine screens are uniformly distributed on the outer cylinder at intervals.

Preferably, the driving device comprises a coupler, a belt mechanism and a motor, one end of the rotating shaft extends out of the box body and is connected with the belt mechanism through the coupler, and the other belt wheel of the belt mechanism is connected with the motor spindle.

Preferably, a dryer is obliquely arranged below the grinding drum, a feed inlet of the dryer is communicated with an opening in the bottom of the grinding drum, and a discharge outlet of the dryer extends out of the box body.

Preferably, a discharge valve is arranged in the hopper.

The utility model has the advantages that: the technical scheme has the innovation point of combining wet ultrasonic grinding and roller grinding, the wet grinding ensures that the particle size distribution of the material is more uniform, the whole process does not involve grinding media, and the method has the advantages of multistage grinding, less impurities in the obtained product, high purity and uniform particle size.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the structure of the inner grinding barrel of the present invention.

Detailed Description

The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.

As shown in figures 1 and 2, the fine grinding device for the aluminum oxide materials comprises a box body 1 and a hopper 2, wherein a discharge port 16 of the hopper 2 extends into the box body 1 and is fixedly connected with the box body 1, and is characterized in that a grinding box is arranged in the box body 1, the discharge port 16 of the hopper 2 is communicated with the grinding box, a water inlet pipe 9 is fixedly connected with the grinding box, an ultrasonic grinding mechanism positioned in the box body 1 is arranged above the grinding box, ultrasonic processing is a comprehensive result of the impact, polishing and cavitation erosion effects on the materials, wherein the continuous impact is taken as the main result, the harder and harder materials are more severely damaged under the impact effect, particularly glass and ceramic materials, so the aluminum oxide materials can meet the requirement of good particle size under the effect of the ultrasonic grinding mechanism, the bottom of the grinding box is of a screen mesh structure, the lower part of the grinding box is communicated with a material flow channel through the mesh structure, a grinding cylinder positioned below the grinding box is also arranged in the box body 1, an inner barrel 19 and an outer barrel 17 are fixedly arranged in the grinding barrel from the circle center to the periphery in sequence, a flow passage is communicated with the inner barrel 19, a rotary table 10 is arranged on one side, deviating from the flow passage, of the inner barrel 19, a rotary shaft 11 is coaxially connected with the rotary table 10, one end of the rotary shaft 11 extends out of the box body 1 to be connected with a driving device, an inner grinding roller 20 group and an outer grinding roller 18 group which are distributed along the radial direction of the rotary table 10 at intervals are arranged on the rotary table 10 in a rotating mode, the inner grinding roller 20 group extends into the inner barrel 19 and is close to the inner barrel 19, the outer grinding roller 18 group extends into a space between the inner barrel 19 and the outer barrel 17 and is close to the outer barrel 17, the inner grinding roller 20 group and the outer grinding roller 18 group respectively comprise a plurality of grinding rollers which are uniformly distributed along the circumferential direction of the rotary table 10, the inner grinding roller and the inner barrel 19 carry out primary grinding, the granularity and the uniformity of the materials are further refined, and an opening is arranged below the grinding cylinder. The material with enough fine granularity flows out from the screen mesh structure at the bottom of the grinding box, enters the central cavity of the grinding cylinder along the material flowing channel, is extruded and rolled by the grinding roller and the cylinder wall in the grinding cylinder, the material particles are crushed into finer powder under the action of shearing force, and the material with the particle size meeting the requirement flows out from the opening below the grinding cylinder.

Ultrasonic grinding mechanism, including low-speed motor 4, fixed block 6, sleeve 7 and ultrasonic vibrator 8, fixed block 6 is located box 1 and is connected with the low-speed motor 4 off-centre of box 1 outside, still installs sliding ring 5 on the low-speed motor 4, and ultrasonic vibrator 8 passes through the wire and is connected with sliding ring 5, ultrasonic vibrator 8 and sleeve 7 fixed connection, sleeve 7 and 6 threaded connection of fixed block. The fixed block 6 rotates at a slow speed, the ultrasonic vibrator 8 rotates along with the fixed block 6, an external high-frequency power supply controls the ultrasonic vibrator 8 to vibrate at a high frequency through the sliding ring 5, and the rotating sleeve 7 drives the ultrasonic vibrator 8 to move up and down so as to adjust the distance between the ultrasonic vibrator 8 and the bottom of the grinding box.

The inner cylinder 19 and the outer cylinder 17 are both provided with wear-resistant coatings, coarse screens are uniformly distributed on the inner cylinder 19 at intervals, and fine screens are uniformly distributed on the outer cylinder 17 at intervals. The rotating shaft 11 rotates at a high speed to drive the grinding roller fixed on the turntable 10 to move circumferentially, the materials are thrown between the inner layer grinding roller and the inner barrel 19 under the action of centrifugal force, the inner grinding roller 20 grinds the materials in a rolling manner, the materials meeting the particle size are thrown out of the coarse screen mesh to be between the outer grinding roller 18 and the outer barrel 17, the grinding is carried out for the second time, and the materials meeting the particle size are thrown out of the fine screen mesh and flow out of the grinding barrel.

The driving device comprises a coupler 12, a belt mechanism 13 and a motor 14, one end of the rotating shaft 11 extends out of the box body 1 and is connected with the belt mechanism 13 through the coupler 12, and the other belt wheel of the belt mechanism 13 is connected with a main shaft of the motor 14. The motor 14 drives the rotating shaft 11 to rotate at a high speed through the belt mechanism 13, so as to provide power for the rotary grinding of the grinding roller.

The drying machine 15 is obliquely arranged below the grinding cylinder, a feed inlet of the drying machine 15 is communicated with an opening at the bottom of the grinding cylinder, and a discharge outlet 16 of the drying machine 15 extends out of the box body 1. Because wet grinding is adopted in the previous grinding stage for uniform powder granularity, the materials need to be dried when being output so as to avoid caking after being dried by air.

A discharge valve 3 is arranged in the hopper 2. The discharge valve 3 can be opened or closed at any time, so that the flow of the materials is conveniently controlled.

The utility model discloses when using, open baiting valve 3, the material gets into the grinding case from hopper 2, low-speed motor 4 drives 6 slow rotations of fixed block, ultrasonic vibrator 8 follows fixed block 6 and rotates, external high frequency power carries out high frequency vibration through sliding ring 5 control ultrasonic vibrator 8, water gets into the grinding incasement from inlet tube 9, and mix with the material, ultrasonic vibrator 8 pivoted in-process makes material and water homogeneous mixing, exert the impact to the liquid medium who contains the material simultaneously, throw the mill, hydraulic shock machine cavitation erosion, make the material deformation in the processing region, until being smashed into particle and powder. The material crushed by the ultrasonic wave passes through a screen mesh structure at the bottom of the grinding box to enter a grinding cylinder, and is ground again by a grinding roller, and the powder with qualified particle size flows into a dryer 15 to be dried and is finally output from a discharge hole 16.

The utility model has the advantages that: compared with the prior art, the technical scheme has the innovation point of combining wet-process ultrasonic grinding and roller grinding, the wet-process grinding ensures that the particle size distribution of the material is more uniform, the whole process does not involve grinding media, and the method has the advantages of multistage grinding, less impurities in the obtained product, high purity and uniform particle size.

The above-mentioned embodiments are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design concept of the present invention should be included in the protection scope defined by the claims of the present invention.

Claims

1. A fine grinding device for aluminum oxide materials comprises a box body (1) and a hopper (2), wherein a discharge port (16) of the hopper (2) extends into the box body (1) and is fixedly connected with the box body (1), and is characterized in that a grinding box is arranged in the box body (1), the discharge port (16) of the hopper (2) is communicated with the grinding box, a water inlet pipe (9) is fixedly connected onto the grinding box, an ultrasonic grinding mechanism positioned in the box body (1) is arranged above the grinding box, the bottom of the grinding box is of a screen structure, the lower part of the grinding box is communicated with a material flowing channel through the screen structure, a grinding cylinder positioned below the grinding box is further arranged in the box body (1), an inner cylinder (19) and an outer cylinder (17) are sequentially and fixedly arranged in the grinding cylinder from the circle center to the periphery, the material flowing channel is communicated with the inner cylinder (19), a rotary table (10) is arranged on one side of the inner cylinder (19) far away from the material flowing, pivot (11) one end is stretched out box (1) and is connected drive arrangement, it is equipped with along radial interval distribution's of carousel (10) interior grinding roller (20) group and outer grinding roller (18) group to rotate on carousel (10), and interior grinding roller (20) group stretches into in inner tube (19) and is close to inner tube (19), and outer grinding roller (18) group stretches into between inner tube (19) and urceolus (17) and is close to urceolus (17), and interior grinding roller (20) group and outer grinding roller (18) group all include a plurality of grinding rollers that set up along carousel (10) circumference equipartition, the grinding cylinder below is equipped with the opening.

2. The aluminum oxide material fine grinding device according to claim 1, wherein the ultrasonic grinding mechanism comprises a low-speed motor (4), a fixed block (6), a sleeve (7) and an ultrasonic vibrator (8), the fixed block (6) is located in the box body (1) and eccentrically connected with the low-speed motor (4) outside the box body (1), a slip ring (5) is further mounted on the low-speed motor (4), the ultrasonic vibrator (8) is connected with the slip ring (5) through a lead, the ultrasonic vibrator (8) is fixedly connected with the sleeve (7), and the sleeve (7) is in threaded connection with the fixed block (6).

3. The fine grinding device for aluminum oxide materials according to claim 1, wherein the inner cylinder (19) and the outer cylinder (17) are both provided with wear resistant coatings, coarse screens are uniformly distributed on the inner cylinder (19) at intervals, and fine screens are uniformly distributed on the outer cylinder (17) at intervals.

4. The fine grinding device for the aluminum oxide material according to claim 1, wherein the driving device comprises a coupling (12), a belt mechanism (13) and a motor (14), one end of the rotating shaft (11) extends out of the box body (1) and is connected with the belt mechanism (13) through the coupling (12), and the other belt wheel of the belt mechanism (13) is connected with a main shaft of the motor (14).

5. The aluminum oxide material fine grinding device according to claim 1, wherein a dryer (15) is obliquely arranged below the grinding drum, a feed inlet of the dryer (15) is communicated with a bottom opening of the grinding drum, and a discharge outlet (16) of the dryer (15) extends out of the box body (1).

6. An aluminum oxide material fine grinding apparatus according to claim 1, wherein a discharge valve (3) is provided in said hopper (2).