KR20020073778A - Mix disintegration apparatus of super fines powder using ultrasonic wave - Google Patents

Abstract

PURPOSE: Provided is an apparatus for mixing and grinding ultrafine powder uniformly by using ultrasonic waves, which prevents the ground fine powder from attaching to the surfaces of a ball and a mill and breaks the coagulation of the ground fine powder. CONSTITUTION: The apparatus for mixing and grinding the ultrafine powder comprises an ultrasonic power device(7) for generating the ultrasonic waves, a sealed cylindrical mill(2) containing the mixed and ground material(8) of the ultrafine powder, ultrasonic oscillators(1) attached around the mill(2), a rotation device for rotating the mill(2), a rotary feeder through power supply device(3) for supplying power to the rotation device, and an agitator, wherein the rotation device comprises a motor(6), a belt(5) transmitting the rotation force of the motor(6), and a bearing(4).

Description

MIX DISINTEGRATION APPARATUS OF SUPER FINES POWDER USING ULTRASONIC WAVE}

In the present invention, the fine powder used in the ceramic product manufacturing process is mainly manufactured by a fine grinding machine, which is a ball mill, a rod mill, or a vibration mill that vibrates them, and particles to collide with each other. A jet mill or the like which is pulverized is mainly used, and using such a pulverizer, a raw material of 10 to 3 mm is pulverized to 150 m or less.

In general, the force applied to such a mill is an impact, shear force. It is difficult to produce ultrafine powders of 0.1 micron or less only by impact and shearing force, and thus requires a long time of grinding.

Particularly, the smaller the particles at the time of mixing and pulverizing the ultrafine particles, the higher the surface energy of the particles causes agglomeration between the particles and the particles. Has been a major obstacle to the manufacture and ultrafine grinding of particles.

In addition, a ball mill and an agitator are used to uniformly disperse and mix ultra-fine powders of 0.1 micron or less manufactured by different methods such as chemical vapor deposition. Although organic dispersants or mixing operations are carried out for a long time to crush and prevent reagglomeration, there are many difficulties in obtaining a uniform dispersion mixture.

An object of the present invention is to prevent the non-uniform dispersion mixing by further eliminating the surface energy of the particles by removing the surface energy of the particles by the use of ultrasonic waves during the mixing and grinding of the ultra fine particles to remove the non-uniform dispersion mixing, furthermore ultra fine particles This is to facilitate the grinding of the field.

The force acting on the ball and the mill for the ultra pulverization of raw materials is the impact force and shear force caused by the collision of the ball and the ball, and the impact force and shear force generated between the wall of the ball and the mill. pulverize raw materials of mm to 150m or less

However, as the operation time of the ball mill increases, the grinding efficiency of the raw material particles does not increase linearly proportionally and does not decrease below a certain particle size. This is because the finer the pulverized particles, the higher the surface energy (= (E / r), where = fracture strength = surface energy, r = distance between atoms, and E = Young's modulus). A layer of agglomerated particles is formed on the surface of the over-mill to cushion the shear, friction, and impact forces generated in the mill to further prevent grinding.

In addition, even when the agitator is used to obtain a homogeneous mixture, the finer the raw material to be mixed, the more the mixing effect of the rotating shaft is not increased by the surface energy of the particles, but rather decreases.

1 is a front view of the mixing and pulverizing apparatus of the ultra fine powder of the present invention,

2 is a side view of the mixing and pulverizing apparatus of the ultra fine powder of the present invention;

3 is another first embodiment of the mixing and pulverizing apparatus for ultra-fine powder of the present invention;

4 is another second embodiment of the mixing and pulverizing apparatus of the ultra fine powder of the present invention;

5 is another third embodiment of the mixing and pulverizing apparatus for ultrafine powder of the present invention;

6 is another fourth embodiment of the mixing and pulverizing apparatus for ultra-fine powder of the present invention.

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

1,31,41,51: ultrasonic oscillator 2: wheat

3,53: Rotary Feeder Throw Power Supply

4: bearing 5,55: belt

6,36,46,66: motor 7,37,47,57,67: ultrasonic power supply

32, 42, 43, 52: container 33: valve

34,44,64 Agitator 38,45,58,68 Crushed product

54 axis 62 chamber

The present invention relates to an ultra-fine powder using a ultrasonic mixing and pulverization apparatus, by attaching an ultrasonic generator to a conventional ball mill (ball mill) device, or more uniformly dispersed mixing using an agitator, ultrasonic It is a device for attaching a generator to prevent the adhesion of fine particles to the surface of the mill and to destroy the aggregates between the fine particles to produce a uniform micromixture, furthermore, to induce the destruction of the pulverized fine particles by ultrasonic waves.

By applying an ultrasonic wave in the mixing of the organic dispersant and the pulverized object added for the uniform mixing of the pulverized product, it is possible to increase the dispersing action of the organic additive and significantly reduce the amount of dispersant through the improvement of the dispersing effect of the organic additive.

In addition, this action dramatically increases the dispersion efficiency of the uniform dispersion of raw materials and doping components, which have the most important influence on the properties of electronic and optical ceramic materials, and dramatically shortens the normal use time of the mill, thereby contaminating the ball by wear. It is possible to reduce.

Ultrafine powder mixed grinding device using the ultrasonic wave of the present invention is divided into continuous type (continuous type) and batch type (batch type), in the continuous type fluid continuously supplied to the mixed grinding container with ultrasonic generator It is possible to set the amount of slurry, operating temperature, operating time and diffraction rate. In the case of batch type, a container containing raw materials is installed and operated in an ultrasonic generator, and a grease or an organic solvent is filled between the raw material container and the ultrasonic diaphragm and used as a transmission medium for vibration. At this time, the container containing the raw material is a metal material that transmits vibration well and the inside is coated with urethane or Teflon.

Such a batch type should be able to easily fit the mill into the ultrasonic generator, the ultrasonic wave generated by the ultrasonic generator to be transmitted through the bottom of the mill, to control the rotational speed of the mill, and also to increase the size of the grinding vessel Make it available.

Specific components of the ultrafine powder mixing and crushing apparatus using ultrasonic wave are composed of ultrasonic oscillator, ultrasonic power supply, mill, rotary feeder throw power supply, controller, agitator, and so on. Adjust the water level of the flow rate and the set time of the ultrasonic generator.

The ultrasonic oscillator used in the present invention serves to convert electrical energy into mechanical vibration energy, and when the generated ultrasonic vibration is transmitted to the grinding object, the ultrasonic oscillator serves to mix and grind the ultrafine powder by mechanical vibration. The structure of the ultra-fine powder mixed grinding device using ultrasonic waves can be realized as follows.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view of the mixing grinder of the ultrafine powder of this invention. When power is supplied from the ultrasonic power supply device 7, power is supplied to the ultrasonic oscillator 1 through the rotary feeder throw power supply device 3, and the motor 6 rotates to transmit the rotational force to the belt 5 The mill 2 is rotated so that the pulverized product 8 inside the mill 2 is mixed and ground. The ultrasonic oscillator 1 is a structure which is installed in four places of the upper and lower left and right sides of the mill 2, and the notation code 4 is a bearing.

FIG. 2 is a side view of the ultra-fine powder mixing and pulverizing apparatus of the present invention, which shows a state in which a pulverized product inside the mill 2 is rotated and subjected to a force when the mill 2 is rotated.

3 is another first embodiment of the ultra-fine powder mixing and pulverizing apparatus of the present invention, when power is supplied from the ultrasonic power supply device 37, it is transmitted to the ultrasonic oscillator 31, and using the motor 46, the agitator 34 is shown. It is a structure for mixing and grinding the pulverized material 38 in the container 32 by rotating the pulverized material, the pulverized material is installed to be discharged to the outside through the valve 33.

4 is a second embodiment of another embodiment of the ultra-fine powder mixed pulverization apparatus of the present invention, which is the same as that in FIG.

FIG. 5 is a third embodiment of the mixing and crushing apparatus for ultra-fine powder of the present invention. In the power supply device 57, power is supplied to the ultrasonic oscillator 51, and the pulverized product 58 inside the sealed container 52 is shown. Is a structure in which the motor is rotated through the belt 55, the shaft 54, and the rotary feeder throw 53 so as to operate.

FIG. 6 shows another embodiment of the ultra-fine powder mixed grinding device of the present invention, injecting raw materials into the sealed chamber 62 and rotating the agitator 64 motor to stir the grind material 68. The pulverized pulverized material is moved to the spray dryer in a slurry state.

Characteristic of the mixing grinding device using the ultrasonic wave of the present invention is to prevent the adhesion of fine particles to the surface of the mill by removing the particle layer that interferes with the impact, shear and frictional force transmission of the ball and mill, thereby dramatically improving the grinding and mixing efficiency of the ball mill . In addition, it acts to hinder the reaggregation of the pulverized ultrafine particles and at the same time serves to pulverize the primary pulverized fine particles.

By using ultrasonic waves to increase the dispersing action of the organic dispersant added or using an agitator for uniform mixing of the pulverized, it is possible to drastically reduce the amount of dispersant used by improving the dispersing effect.

By this action, homogeneous mixing of raw materials and doping components, which have the most important influence on the properties of electronic and optical ceramic materials, can be obtained within a short time. It is possible to reduce contamination due to ball wear by drastically shortening the normal use time of the ball mill from 24 to 48 hours to 10 hours.

Claims (5)

It is a device that mixes and grinds the ultra fine powder, An ultrasonic power supply for generating ultrasonic waves, A closed cylindrical mill containing a mixture of ultra fine particles and a crushed product, An ultrasonic oscillator attached around the mill to generate ultrasonic vibrations, A rotating device for rotating the mill in the ultrasonic power supply; Ultra-fine powder mixed grinding device using ultrasonic waves, characterized in that consisting of a rotary feeder throw power supply for supplying power to the rotating device. The method of claim 1, The rotating device is a mixed grinding device of ultra-fine powder using ultrasonic waves, characterized in that consisting of a motor, a belt for transmitting the rotational force of the motor, and a bearing for supporting it. The method of claim 1, Ultra-fine powder mixed pulverization using ultrasonic, characterized in that the mill device is made in the shape of a closed polygon and inclined to be inclined, the pulverized product is also inclined, so that the mixed pulverization is effectively possible. The method of claim 1, Ultrasonic powder mixed crushing apparatus using ultrasonic waves, characterized in that the agitator is installed in order to agitate the mill to rotate the ultra-fine powder by rotating it. The method of claim 1, Said mill is installed in double, and the agitator for stirring the grinding | pulverization of ultra-fine powder is provided, The ultra-fine powder mixing crushing apparatus using ultrasonic waves.