WO1991006370A1

WO1991006370A1 - Vibration grinding classifier

Info

Publication number: WO1991006370A1
Application number: PCT/JP1990/001381
Authority: WO
Inventors: Terumi Sasaki
Original assignee: Kansai Zyari Kabushiki-Kaisha
Priority date: 1989-10-31
Filing date: 1990-10-26
Publication date: 1991-05-16
Also published as: AU6609090A; EP0451290A1; JPH03146181A; EP0451290A4

Abstract

A vibration grinding classifier for a mineral material, which is simple in construction, compact in size and capable of offering a satisfactory classifying accuracy. This classifier is provided with a vibration motor (3) for oscillating grinding media in an annular vibration tank (1) containing therein a multitude of grinding media for grinding a powdery material (P) and a supply opening for the material (P). The lower part of the tank (1) serves as a grinding chamber (1a) in which the opening width in the radial direction is progressively increased from the bottom upward. The bottom plate of the grinding chamber is provided with a multitude of perforations (4a) for feeding air, which communicate with an air opening (4) for a classifying gas. The upper part of the tank (1) acts as a classifying chamber (1b) extending upwardly with the same opening width as that at the top end of the grinding chamber maintained. The top of the classifying chamber is provided with a discharge opening (7) through which a ground article of an intended particle size or below is discharged together with the classifying gas blown up through the perforations (4a).

Description

Description Vibration pulverizing and classifying equipment Technical field

TECHNICAL FIELD The present invention relates to a vibrating pulverizing classifier used for pulverizing a raw material such as a mineral powder and classifying the pulverized material.

Background technology

Conventionally, a pulverizer such as an impact-type pulverizer that pulverizes a raw material by a high-speed rotating impact plate and a vibratory pulverizer that pulverizes a raw material by applying vibration to a pulverizing medium such as a rod have been used. The pulverized material pulverized by these pulverizers was subjected to another classifier to obtain a pulverized material having a target particle size.

As a classifier used for classifying the pulverized material, for example, a centrifugal classifier is known. In this centrifugal classifier, the container containing the crushed material was rotated at a high speed, and the crushed material was classified into coarse particles and fine powder by the centrifugal force.

However, as described above, the conventional pulverizer has a problem that a separate classifier is required, and the entire apparatus becomes large and complicated.

Furthermore, the classifier requires a large-sized container to rotate at a high speed, which complicates the equipment.If the pulverized material is in a flocculated state, the classification cannot be performed reliably and the required classification accuracy can be obtained. Was not. In addition, the crushed material is pushed against the inner surface of the container by centrifugal force. Because of this discipline, the inner surface of the container wears quickly, and there is a problem in that replacement of the container increases costs.

Disclosure of the invention

The present invention has been made to solve the above-mentioned conventional problems, and the first problem is to make it possible to simplify the apparatus and make it compact, and to obtain sufficient classification accuracy. This is the development of a vibrating crusher and classifier.

The second issue is the development of a vibratory pulverizer and classifier that enables efficient pulverization and classification.

In order to solve the first problem, the vibration grinding and classifying apparatus of the present invention is configured as follows. A vibrating tank for accommodating a large number of pulverizing media for pulverizing the powder raw material is formed in a ring shape. The vibrating tank is provided with a vibration motor for vibrating the pulverizing medium, and Supply port is open. The lower part of the vibrating tank is formed in a pulverizing chamber whose radial opening width is increased from the bottom upward, and the upper part of the vibrating tank is maintained upward while maintaining the opening width of the upper end of the pulverizing chamber. It is formed in an extended classroom. The bottom plate of the pulverizing chamber is provided with a number of air supply holes that communicate with the air inlet for the classified gas. At the upper part of the classification chamber, there is formed an outlet for discharging the pulverized material having the target particle size or less together with the classification gas blown up from the air supply small hole.

In this way, a large number of grinding media contained in the vibration tank vibrate due to vibration from the vibration motor.

Powder material is fed from the supply port into the grinding chamber of the vibrating tank The charged powder raw material is efficiently pulverized by the collision and contact action of the pulverization media due to the vibration of the pulverization medium, and the floc state is also efficiently pulverized.

A classifying gas such as air is supplied from the bottom of the crushing chamber through an air supply hole, and the classifying gas passes through the crushing chamber such that the opening width of the crushing chamber is upward from the bottom.增 As it moves, it will pass upward while gradually decelerating from the highest flow rate, flow into the classification chamber, and pass through this classification chamber at a certain minimum flow rate and exit upward.

Therefore, the classification gas is blown from below to the powder material in the grinding chamber, and in this case, the classification gas immediately after being blown out from the air supply holes is blown to the powder material at the highest flow rate. The maximum flow velocity is set so as to have a blowing force against the falling of the powder material, and the minimum flow velocity of the classified gas decelerated in the pulverizing chamber is to have a blowing power for the pulverized material, which is finer than the target particle size. Is set to Of the pulverized material, fine powder having a target particle size equal to or smaller than the target particle size blown up at the minimum flow rate of the classification gas rises from the pulverizing chamber through the classification gas, is discharged from the discharge port together with the classification gas, and thereafter, the fine powder is separated from the classification gas. You.

In this way, the powder raw material is pulverized while the fine powder of the target particle size or less is blown up at the minimum flow rate of the classification gas, and the coarse particles are blown up at the maximum flow rate of the classification gas but cannot be blown up at the lowest flow rate Classified with the body.

In order to solve the second problem, the vibrating and crushing classifier of the present invention further comprises a vibrating tank having a meandering ring shape. Is formed.

In this way, since the vibrating tank is formed in a meandering ring shape, the transmission rate of vibration to the pulverization medium is improved, and the collision and contact between the pulverization media are complicated by that much, and Since the raw material is finely crushed, efficient crushing and classification can be performed.

Further, in order to solve the second problem, in the vibration crushing and classifying apparatus of the present invention, a baffle member for forcibly transmitting the vibration of the vibration tub to the crushing medium is provided in the vibration tub.

As described above, the collision and contact between the pulverizing media are complicated by the obstruction member, and the pulverization of the powder raw material is performed finely, so that the pulverization and classification can be performed efficiently.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is an overall cross-sectional view showing a vibration crushing and classifying apparatus of Example 1.

FIG. 2 is a perspective view showing an internal structure of the vibration crushing and classifying apparatus.

FIG. 3 is a cross-sectional view of the vibration pulverizing and classifying apparatus.

FIG. 4 is a plan view showing a vibration tank of the vibration crushing and classifying apparatus of the second embodiment.

FIG. 5 is a perspective view showing the internal structure of the vibration crushing and classifying apparatus of the third embodiment.

FIG. 6 is an explanatory view showing another mounting state of the vibration motor.

BEST MODE FOR CARRYING OUT THE INVENTION [Example 1]

FIGS. 1 to 3 show a vibrating powder classifier of the first embodiment. The configuration of this vibration crushing and classifying apparatus will be described below.

In the figure, reference numeral 1 denotes a vibration tank, which is formed in a ring shape by a large-diameter circular outer cylinder 10 and a small-diameter circular inner cylinder 11. The upper surface of vibration tank 1 and the upper surface of inner cylinder 11 are closed by upper plate 12, and the bottom surface of vibration tank 1 and the lower surface of inner cylinder 11 are closed by substrate 13.

Further, the vibration tank 1 is supported on a base 2 fixed to the floor surface via a coil spring 20 so as to be able to vibrate. Further, two vibration motors 3, 3 are provided on the lower surface of the base 13. The vibrating motors 3, 3 are arranged so as to face each other on the diameter of the vibrating tank 1, and to rotate in the same direction as viewed from the center of the vibrating tank 1.

The lower portion of the vibrating tank 1 is formed in a crushing chamber 1a in which the width of the opening in the radial direction increases upward from the bottom by the inclined plates 14 and 14. The upper part of the vibrating tank 1 is formed as a classifying chamber 1b extending upward while maintaining the opening width of the upper end of the pulverizing chamber 1a, and the pulverizing material is contained in the pulverizing chamber 1a and the classifying chamber 1b. A large number of spheres B serving as a grinding medium for P are housed.

The bottom 15 of the pulverizing chamber 1a is provided with a number of air supply small holes 4a communicating with the air supply port 4 of the classification gas A.

Further, a raw material supply pipe 60 having a leading end serving as a supply port for the powdery raw material P is connected to the pulverizing chamber 1a. 5 Immediately after a The location is open. The raw material supply pipe 60 includes a plurality of branch pipes 62 branching from the outer cylinder 61 and then penetrating through the outer cylinder 10 and the inclined plate 14 to face the pulverizing chamber 1a. A raw material supply cylinder 63 is connected to the pipe 61.

In addition, at the upper part of the classifying chamber 1b, there is formed a discharge port 7 for discharging the fine powder P2 having a particle size equal to or smaller than a target particle size of the powder raw material P together with the classification gas A blown up from the air supply small hole 4a. Have been. The discharge port 7 penetrates the inner cylinder 11 and is formed so that its opening direction is along the inner peripheral surface of the inner cylinder 11.

The outlet 7 communicates with a fine powder recovery port 8 and a gas outlet 9 for the classified gas A. The recovery port 8 is provided with a recovery pipe 81 extending from a hopper 80 provided at a lower portion of the inner cylinder 11 to the outside through the inner cylinder 11 and the outer cylinder 10. The gas outlet 9 is formed so as to extend from the inner upper end of the inner cylinder 11 to the outside through the upper plate 12, and the periphery thereof is a guide cylinder vertically suspended from the inner surface of the upper cylinder 12. It is surrounded by 90. In addition, a dust collector, a cyclone and the like (not shown) are connected to the end of the gas outlet 9.

[Action]

When the vibration motors 3 and 3 operate, the vibration directions of the pendulums of the vibration motors 3 and 3 are synchronized in the vertical direction and the circumferential direction, and the vibration tank 1 receives the vibration and moves along the circumferential direction with vertical movement. Vibrates in a circular motion. Due to the vibration of the vibration tank 1, the large number of spheres B accommodated therein move in the circumferential direction in the crushing chamber 1a and the classifying chamber 1b while vibrating. Further, the powdery raw material P supplied from the raw material supply cylinder 63 into the annular pipe 61 is vibrated in such a manner as to make a circular motion substantially along the outer peripheral surface of the vibrating tank 1 so as to pass through the annular pipe 61. It is transferred and distributed in one direction while vibrating, and is supplied into the grinding chamber 1 a of the vibrating tank 1 via each branch pipe 62 and the supply port 6.

The powder raw material P thus supplied is crushed by the collision and contact between the spheres B caused by the vibration of the spheres B while moving along with the movement of the spheres B, and the floc is also crushed. . After the powder raw material P is dropped and supplied from the raw material supply cylinder 63 into the annular pipe 61, the powder raw material P is transferred in one direction while being vibrated by the vibration of the vibrating tank 1. On the way, it is sized and supplied from the supply port 6 in this sized state.

Further, a classification gas A such as air is supplied from the bottom of the crushing chamber 1a through the small holes 4a for air supply. In the grinding chamber 1a, the classification gas A passed upward while gradually decreasing from the maximum flow velocity due to the opening width of the grinding chamber 1a flowing upward from the bottom. Flow into chamber 1b, pass through this classification chamber 1b at a certain minimum flow rate, and exit upward

I ^ o

Therefore, the classifying gas A is blown from the air supply holes 4a to the powder raw material P supplied into the pulverizing chamber 1a. In this case, the classification gas A is blown out from the air supply holes 4a. Immediately after the classification, the classification gas A is blown to the powder material P at the maximum flow rate, and the maximum flow rate is set so as to have a blowing force against the falling of the powder material P. PT / JP90 1381

-8-It is specified. The minimum flow velocity of the classified gas A decelerated in the crushing chamber 1a is set so as to have a blowing force of the fine powder P2 having a target particle size or less.

The fine powder P2 blown up at the lowest flow rate of the classifying gas A among the granules of the powder raw material P rises from the pulverizing chamber 1a through the classifying chamber 1b, and is discharged together with the classifying gas A at the outlet 7. Are discharged from In this case, since the discharge port 7 is opened along the inner peripheral surface of the inner cylinder 11, the fine powder P 2 blown out together with the classification gas A is subjected to centrifugal force due to the flow of the classification gas A, so that the inner cylinder 1 is discharged. Separates from the classification gas A by adhering to the inner peripheral surface of 1. The separated fine powder P2 falls downward, is collected by the hopper 80, and is collected via the collection pipe 81. Further, the classification gas A rises in a U-turn from the lower end of the guide cylinder 90 toward the center, and is exhausted from the gas outlet 9.

Further, among the particles of the powder raw material P, the coarse particles P1, which cannot be blown up at the minimum flow rate of the classification gas A, remain in the grinding chamber 1a and are pulverized until the particle size becomes equal to or smaller than the target particle size.

[Example 2]

Next, a vibration crushing and classifying apparatus according to a second embodiment will be described with reference to FIG.

This vibration crushing and classifying apparatus is characterized in that the vibration tank 1 is formed in a meandering ring shape by a large-diameter corrugated outer cylinder 10a and a small-diameter corrugated inner cylinder 11a. The other configuration is the same as in the first embodiment, and a description thereof will not be repeated.

Therefore, in this vibration crushing and classifying apparatus, the vibration tank 1 meanders. Since it is formed in a ring shape, the sphere B moves in the circumferential direction as a whole while moving laterally. The collision and contact between the spheres B are complicated by the amount of the lateral movement added to the movement, and the powder material P is finely crushed, and the movement distance of the sphere B and the powder material P becomes longer. Thus, efficient classification can be performed.

[Example 3]

Next, a vibration crushing and classifying apparatus according to a third embodiment will be described with reference to FIG.

This vibrating pulverizing and classifying apparatus is characterized in that a baffle bar (baffle member) C for forcibly transmitting the vibration of each vibrating tank 1 to the sphere B is provided in the vibrating tank 1. The other configuration is the same as in the first embodiment, and the description is omitted.

Therefore, in this vibration crushing and classifying apparatus, the collision and contact between the spheres B are complicated by the baffle rod C, and the powder material P is finely crushed, so that efficient crushing and classification can be performed. Become.

As described above, the embodiments of the present invention have been described with reference to the drawings. However, the present invention is not limited to the above embodiments, and design changes that do not depart from the gist of the present invention are included in the present invention.

For example, the number of vibration motors is not limited to two.

Further, the mounting position of the vibration motor is also arbitrary. For example, as shown in FIG. 6, the vibration motor 3 may be mounted so that the axis of the rotating shaft is substantially vertical. in this case, In particular, there is an advantage that vertical vibration can be eliminated. Also in this case, the number of vibration motors 3 to be used is arbitrary.

The shape and material of the pulverizing medium are arbitrary, and ceramic or metal may be used as the material.

As the classification gas, nitrogen gas or the like can be used in addition to air.

As described above, in the vibration crushing and classifying apparatus of the present invention, by providing the annular vibration tank, a series of processes of separating the raw material into coarse particles and fine powder while crushing the powder raw material are provided. Since the classification operation can be performed continuously, the equipment can be simplified and compacted. In addition, since the pulverized raw material is pulverized with a pulverizing medium and the flow rate of the classification gas is reduced, the fine powder is blown up at the minimum flow rate, so that the classification accuracy is high.

In the vibration crushing and classifying apparatus of the present invention, since the vibrating tank is meandering, the efficiency of collision and contact between crushing media is increased, and the efficiency of crushing and classification is further improved.

In the vibration crushing and classifying apparatus of the present invention, the provision of the obstruction member in the vibration tank increases the efficiency of collision and contact between the crushing media, and further improves the efficiency of crushing and classification.

Industrial applications

The vibration pulverizing and classifying apparatus of the present invention is used for pulverizing a raw material such as a mineral powder and classifying the pulverized material.

Claims

The scope of the claims

1. A vibrating tank (1) containing a large number of pulverizing media for pulverizing the powder material (P) is formed in a ring shape,

The vibrating tank (1) is provided with a vibrating means (3) for vibrating the pulverizing medium, and a supply port (6) for the powder raw material (P) is opened.

The lower part of the vibrating tank (1) is formed in a crushing chamber (1a) whose radial opening width is increased from the bottom upward, and the upper part of the vibrating tank (1) is formed in the crushing chamber. (La) is formed in a classifying chamber (lb) extending upward while maintaining the width of the upper end opening,

A hole (4a) is formed at the bottom of the crushing chamber (1a) for the classification gas (A) to enter.

In the upper part of the classifying chamber (lb), a discharge port (7) for discharging the crushed material (P2) smaller than the target particle size together with the classification gas (A) blown up from the hole (4a) is formed. Characterized by vibratory crushing and classification equipment.

2. The vibration crushing and classifying apparatus according to claim 1, wherein the vibration tank (1) is formed in a meandering ring shape.

3. The vibration crushing and classifying apparatus according to claim 1, wherein a baffle member (C) for forcibly transmitting vibration of the vibration tub (1) to the crushing medium is provided in the vibration tub (1).

4. The vibrating tank (1) has an outer cylinder (10) and an inner cylinder (11), and has a grinding chamber (la) and a classification chamber (1b) between the outer cylinder (10) and the inner cylinder (11). ) Is formed as described in claim 1 or 2. Dynamic grinding classifier.

3. The vibration crushing and classifying apparatus according to claim 1, wherein the vibration tank (1) is supported on the base (2) by using a spring (20).

6. The crushing medium (B) is contained in the crushing chamber (la) and the classifying chamber (lb) of the vibrating tank (1), and the crushed gas (P 2) is discharged to discharge the crushed material (P 2) having the target particle size or less. (A) crushing chamber

3. The vibration crushing and classifying apparatus according to claim 1, wherein the vibration crushing and classifying apparatus is configured to blow up from the (l) side to the classification chamber (lb) side.

7. Inside the inner cylinder (1 1), a collecting means for collecting the pulverized material (P 2) having the target particle size or less from the classified gas (A) separately

(8, 8 0,

The vibration crushing and classifying device according to claim 4, wherein 8 1) is provided.

S. The vibration-pulverizing classification device according to claim 4, wherein the inner cylinder (11) is provided with an opening (9) for discharging the classification gas (A) to the outside.

9. The vibrating powder classifier according to claim 1, wherein the vibrating means (3) is a vibrating motor.

10. The vibration crushing and classifying apparatus according to claim 9, wherein the plurality of vibration motors (3) are arranged in a diameter direction of the vibration tank (1).

11. The vibration crushing and classifying apparatus according to claim 9, wherein the direction of the rotation axis of the vibration motor (3) is substantially vertical.

12. The vibration crushing and classifying apparatus according to claim 1, wherein the vibration tank (1) is provided with a supply means (63, 61) for the powder raw material (P).

13. The supply means of the powder raw material (P) is a supply cylinder (63), The vibration crushing and classifying apparatus according to claim 12, comprising an annular pipe (61) connected to the supply tube (63) and a branch pipe (62) connected to the annular pipe (61). .

14. The apparatus according to claim 13, wherein the annular pipe (61) is provided along the periphery of the vibration tank (1).

15. The vibration-pulverizing classifier according to claim 13, wherein the supply port (6) of the branch pipe (62) is connected to the pulverizing chamber (1a).

16. The vibratory pulverizing and classifying apparatus according to claim 1, wherein the pulverizing medium (B) is spherical.

17. The vibration according to claim 4, wherein an opening (7) is formed in the inner cylinder (11), and the classification chamber (lb) is connected to the collection means (8, 80, 81). Pulverizing classifier.

18. The vibration crushing and classifying apparatus according to claim 3, wherein the baffle member (C) is provided radially.

19. The vibration-pulverizing and classifying apparatus according to claim 1, further comprising an air supply unit (41, 4) for feeding the classification gas (A) to the pulverizing chamber (la) via the opening (4a).