JPH06277554A - Atomization device - Google Patents

Abstract

PURPOSE: To simultaneously execute intermediate crush, fine crush and grinding of a material by merging hammer pulverization, impact pulverization and power self-grind into a whole and to improve fineness and to transmit the unfinished product into a selecting system by the high speed vortex. CONSTITUTION: In a pulverization apparatus, a grinding chamber 5 is formed between an inlet 11 and an outlet 10 of the material, bearings are provided at a bottom 12, a shaft 2 driven by a motor is supported by the bearings and extends into the grinding chamber 5, the top of a conical plate 3 is mounted on the shaft 2 and more than one radial blades or radial hammer plates 4 are attached on an inner surface of the conical plate 3 and a powder selector 6 is installed. Further an air blower 7 is installed and an air duct 8 connecting the air blower 7 with the grinding chamber 5 is disposed. In this type of pulverizing apparatus, an air vent 9 of the air ducts 8 is installed above the conical plate 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an atomizer, and more particularly to an atomizer for atomizing a medium size material into extremely small particles.

[0002]

2. Description of the Related Art Conventionally, the problems to be solved by the invention
The ore crushing and grinding process for converting raw materials into products
Several steps were required, such as coarse grinding, intermediate grinding, fine grinding and grinding. Hammer crushing machines and impact crushing machines are generally used for intermediate crushing and fine crushing. Ball mills and roller mills are used for grinding. Therefore, different machines have to be used, different steps have to be carried out and more grinding media has to be consumed for the intermediate grinding, fine grinding and grinding.

The power self-grinding machine disclosed in US Pat. No. 4,176,795 has a vertical shaft mounted with a ball-shaped rotor divided by a vertical separator to push the material. is doing. Unfinished ground material and water are placed in the grinding chamber. When the shaft drives the ball-shaped rotor to rotate at high speed, self-grinding of the material starts,
The comminuted material mixes with water into a viscous (thick) liquid that flows into a sorting system.

The comminution device disclosed in US Pat. No. 3,303,895 is a conical plate mounted on a vertical shaft.
It has a ton (cone). The surface of this plate provides a flange for hammering the ore. Air mouse is a cone-shaped pre-
It is provided under the toe. During the crushing operation, the flange of the plate surface collides with the ore and crushes the ore, and the air flow from the air mouth transfers the crushed ore to the particle sorter above the grinder.

The power self-grinding device for the self-grinding process disclosed in US Pat. No. 4,905,918 has an air vent (forming an angle to the horizontal bottom of the chamber). In this way, unfinished crushed ore is blown off near the bottom of the chamber. Self-grinding is performed by blowing off unfinished crushed ore with a high velocity air stream from an air vent.

The object of the present invention is to integrate hammer crushing, impact crushing and power self-grinding into one, and it is possible to perform intermediate crushing, fine crushing and grinding of the material at the same time, to improve fine particle size, An object of the present invention is to provide an atomizer capable of transferring an unfinished product to a selection (sorting) system by high speed vortex flow.

[0007]

According to the present invention, a grinding chamber is formed between a material inlet and a material outlet, a bearing is provided at the bottom, and a motor-driven shaft is provided. Are supported by the bearings and extend into the grinding chamber, the top of the conical plate is attached to the shaft, and two or more radial blades are provided.
Alternatively, a radial hammer plate is attached to the inner surface of the conical plate, a particle selector is provided, an air blower is provided, and an air duct that connects the air blower and the grinding chamber is provided. There is provided an atomizing device, characterized in that the air vent of (1) is provided above the conical plate.

[0008] Preferably, the air duct is provided around the grinding chamber and communicates with the grinding chamber through two or more air vents, and a point on the inner wall periphery of the grinding chamber (this point corresponds to the air vent). The angle between the vertical line and the center line of the air vent is an acute angle. The above angle is preferably larger than 60 degrees and as close to 90 degrees as possible. It is desirable that the air vents are uniformly distributed along the inner wall of the grinding chamber. For self-grinding, it is desirable for the airflow to enter the grinding chamber at a high velocity. Desirably, the velocity of the air flow is faster than, or at least close to, the tangential velocity at the maximum circumference of the conical plate.

It is also desirable that the air duct communicate with the grinding chamber from above the conical plate (eg, from the top of the grinding chamber). The air vent of the air duct is located directly above the conical plate and faces the conical plate, and the distance from the air vent to the top of the conical plate is preferably less than 1/5 of the length of the grinding chamber. .

Increasing the momentum of the treated ore,
In order to prevent the temperature from becoming too high and suppress the wear of the machine, it is desirable to set the tangential velocity at the maximum peripheral portion of the conical plate to 30 to 50 m / sec.

To ensure sufficient space for self-grinding of the ore, the ratio of the grinding chamber length between the conical plate top surface and the material inlet to the grinding chamber diameter is 1: 1. It is desirable to be larger than / 2.

In order to prevent the unfinished crushed ore from falling from the space between the rotating conical plate and the bottom of the grinding chamber, and in order to ensure that the plate is not blocked, Two or more grooves are provided along the generatrix of the conical plate, and each groove is provided with a strike-off board (the strike-off board is in the space between the conical plate and the bottom of the grinding chamber). Extend).

The effect of the present invention is that the conical plate hammer plate collides with the crushed ore at a high speed by the hammer plate of the conical plate, and the unfinished ore has a large centrifugal force. The finished ore and air flow will have a high tangential velocity and a high vertical velocity along the circumference, so that a high-speed rotating vortex will be formed and self-grinding will be possible. Therefore, according to the present invention, the technical process can be reduced and simplified, the intermediate or fine grinding and grinding of ore can be integrated, the cost of equipment and energy source can be reduced, and the purity of the product can be reduced. And the quality can be improved.

[0014]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings in order to better explain the constitution and features of the present invention.

In the accompanying drawings, 1 is a motor, 2 is a shaft,
3 is a conical plate, 4 is a hammer plate, 5 is a grinding chamber, 6 is a particle sorter, 7 is an air blower, 8 is an air duct, 9 is an air vent, 10 is a material outlet, 11 is a material inlet, and 12 is a grinding chamber. Bottom, 13 is a groove, 14 is a strike-off board, and 15 is a space.

Referring to FIGS. 1 and 4, a conical plate 3 is a centrifugal plate capable of containing ore material, the conical plate 3 being rotatable about a vertical axis 2. it can. The shape of the conical plate 3 is an inverted shape of a truncated cone. It is fixed to the bottom 12 at the smaller end of the conical plate 3. The conical plate 3 is located in the lower part of the grinding chamber 5 and is attached to the shaft 2. The shaft 2 is driven by the motor 1. Further, it is formed between the material inlet 11 and the outlet 10, the particle sorter 6, the air duct 8 for air pump (FIG. 1) or the central air duct 8 (FIG. 4), the bottom 12 of the grinding chamber and the particle sorter 6. Also provided are a grinding chamber 5, an air blower 7 connected to an air duct 8, and an air vent 9 of an air duct through which a high-speed air flow can flow. The high-speed air flow that has passed through the air vent 9 flows into the grinding chamber 5.

With reference to FIGS. 2, 5 and 6, four hammer plates 4 are evenly arranged along the circumferential direction of the inner surface of the conical plate 3. Each hammer plate 4 extends along a generatrix and in a direction perpendicular to the inner surface of the conical plate 3. The hammer plate 4 is removable.

Referring to FIGS. 5, 6 and 7, the groove 13
Are provided along the generatrix of the conical plate 3. Groove 1
The strike-off board 14 fixed to 3 is a rectangular metal plate, one surface of which is fixed to the side of the groove 13 and the other surface of which is semi-wedge shaped. The other side of this semi-wedge extends into the space 15 between the conical plate 3 and the bottom 12 of the grinding chamber. This portion prevents the strike-off board 14 from entering the bottom 12 of the grinding chamber during rotation of the conical plate 3. When the conical plate 3 rotates and pushes the ore material, the ore material falling into the space 15 between the conical plate 3 and the bottom 12 of the grinding chamber is passed through the groove 13 by the strike-off board 14. Is pushed back to the top surface (inner surface) of the conical plate 3. Therefore, the space 15 between the conical plate 3 and the bottom 12 of the grinding chamber is not blocked by the ore material.

With reference to FIGS. 1, 2, 3A and 3B, a particle sorter 6 is provided on top of a cylindrical grinding chamber 5. The screened product is carried out through the material outlet 10. A material inlet 11 is provided on the wall surface of the grinding chamber 5. The cross section of the air vent 9 is semicircular or rectangular, and horizontally surrounds the outer wall of the grinding chamber 5. Since the wall of the grinding chamber 5 is provided with an opening for air vent, the air duct 8 can communicate with the grinding chamber 5 and air can flow into the grinding chamber 5. The angle between the vertical line at a certain point (the point where the center line of the air vent passes) of the inner wall of the grinding chamber 5 and the center line of the air vent 9 is an acute angle. The closer this angle is to 90 degrees, the better. With such an angle,
The air flow from the air vent 9 approaches the tangential direction of the inner wall of the grinding chamber 5, so that the action of the inner wall creates a vortex. The air vents 9 are uniformly distributed along the circumference of the wall of the cylindrical grinding chamber 5. The number of air vents 9 is generally 1 to 8, but the optimum number is 6 to 8. The conical plate 3 is located in the lower part of the grinding chamber 5 together with the hammer plate 4 and is attached to the shaft 2. The linear velocity of the conical plate 3 at the outer edge of the plate should be higher than 9 m / sec. The speed in this embodiment is 30-50 m / sec.

Referring to FIG. 4, a bent duct 8 extends from above the grinding chamber 5 into the grinding chamber 5. The air vent 9 is located immediately above the conical plate 3 and faces the conical plate 3. As the air stream enters the grinding chamber 5 and into the conical plate 3 provided with the hammer plate 4, a high velocity vortex is created.

Referring to FIGS. 6 and 7, the unfinished ground ore material falls into the space 15 between the conical plate 3 and the bottom 12 of the grinding chamber so that the conical plate 3 is not blocked. For this purpose, two or more grooves 13 are provided along the generatrix of the conical plate 3 and a strike-off board 14 is fixed to each groove 13. The strike-off board 14 extends into the space 15 between the conical plate 3 and the bottom 12 of the grinding chamber.

The operating principle of the present invention is as follows.

The raw material for the large particles transferred from the material inlet 11 to the grinding chamber 5 is, first of all, at a high speed a hammer plate.
The crushed material is crushed by the blade 4, the crushed material is scattered toward the wall portion of the grinding chamber 5, and collides with the wall again (intermediate crushing and fine crushing are completed). The crushed material spirals up the inner wall of the grinding chamber 5 with a large amount of kinetic energy and is self-ground. The velocity of the large particle material gradually slows down as the material moves away from the wall and descends with the aid of rising material from the bottom. When the material falls on the surface of the conical plate 3, it is impacted and thrown out again. The material then moves in a circular orbit until it is ground into small particles. The small particles rise spirally along the wall due to the force of the vortex, and further atomization proceeds. The small particles carried by the air stream pass through the particle sorter 6 and the material outlet 10 and finally to the sorting system.

According to the experiment, the atomizing device of the present invention has the function of integrating the intermediate pulverization, the fine pulverization, the grinding and the particle selection into one, so that the processing procedure and the process flow can be shortened and simplified. You can In particular, the ratio of grinding to grinding is high. Generally, the supply ore mass is 150 mm (up to 250 mm). In contrast, ball or vibrating mill feed ore agglomerates are 20-40 mm. The particle size of the product obtained according to the invention can be 60-325 mesh (unit of particles, corresponding to the number of holes per square inch of the shifter) and the output is 1-5 tons / hour.

[Brief description of drawings]

FIG. 1 is a schematic view of the structure of an atomizer having a loop air duct.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a diagram schematically showing a connection between an air vent and a grinding chamber.

FIG. 4 is a schematic view of the structure of an atomizer having a central duct.

FIG. 5 is a plan view of a conical plate having a strike-off board.

6 is a sectional view taken along the line BB of FIG.

7 is a sectional view taken along the line CC of FIG.

[Explanation of symbols]

 1 Motor 2 Axis 3 Conical Plate 4 Hammer Plate 5 Grinding Chamber 6 Particle Sorter 7 Air Blower 8 Air Duct 9 Air Vent 10 Material Outlet 11 Material Inlet 12 Bottom of Grinding Chamber 13 Groove 14 Strike Off Board 15 Space

Front Page Continuation (72) Inventor Wang Zykian People's Republic of China Houbey Province Wuhan City No. 14 Luo Si Road (no address)

Claims (9)

[Claims] 1. A grinding chamber is formed between a material inlet and a material outlet, a bearing is provided at a bottom portion, and a motor-driven shaft is supported by the bearing and extends into the grinding chamber. -The top of the plate is attached to the shaft, two or more radial blades or radial hammer plates are attached to the inner surface of the conical plate, a particle sorter is provided, an air blower is provided, and An atomizer of the type provided with an air duct connecting an air blower and a grinding chamber, wherein an air vent of the air duct is provided above the conical plate. 2. The point where the air duct is provided around the grinding chamber, the air duct communicates with the grinding chamber via two or more air vents, and there is a point on the inner wall periphery of the grinding chamber. The atomizer according to claim 1, wherein the angle between the vertical line and the center line of the air vent is an acute angle (in which the center line of the air vent passes). 3. The atomization device according to claim 2, wherein the air vents are uniformly distributed along the inner wall of the grinding chamber. 4. The air duct communicates with the grinding chamber from above the conical plate, and the air vent is located immediately above the conical plate and faces the conical plate. The atomization device according to claim 1. 5. The atomizer according to claim 4, wherein the distance between the air vent and the conical plate is 1/5 or less of the length of the grinding chamber. 6. The velocity of the air in the air vent is
30 to 50 m / sec.
Alternatively, the atomization device described in 3. 7. The atomizer according to claim 1, wherein the linear velocity of the conical plate at the outer edge of the conical plate is 30-50 m / sec. 8. The ratio of the length of the grinding chamber from the top surface of the conical plate to the material inlet to the diameter of the grinding chamber is greater than 1/2. The atomization device according to any one of 1. 9. Two or more grooves are provided along a generatrix of the conical plate, and each groove has a strike-off board (st).
9. A strike-off board) is provided, wherein the strike-off board extends into a space between the conical plate and the bottom of the grinding chamber. Atomizer.