JP2002035626A - Pulverizer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pulverizer capable of recovering a good quality regenerated aggregate which can be used as an aggregate for concrete from a raw material comprising pit sand or a concrete waste material being often used as a substitute of river sand. SOLUTION: The pulverizer has a rotary hollow body 1 having plural opening parts 4, each of which functions as an inlet and an outlet for a substance to be pulverized, and being rotated after taking the substance to be pulverized in its inside and a necessary number of filling members 2 which are filled at the inside of the rotary hollow body. In the pulverizer above, the filling members are subjected to up-and-down motion by the rotation of the rotary hollow body 1 and thereby, the substance 2 to be pulverized is pulverized. The rotary hollow body 1 is disposed in a vessel 6 to which the substance to be pulverized is charged, and in the vessel 6, a supplying port 7 and a discharge port 5 for the substance to be pulverized are arranged respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fine pulverizer, and more particularly to a fine pulverizer capable of recovering high-quality recycled aggregate usable as concrete aggregate from raw materials such as mountain sand and concrete waste. Is to provide.

[0002]

2. Description of the Related Art Conventionally, in Japan, sand collected from rivers has been used as a raw material for aggregate for concrete. However, as a result of continuous collection of sand for many years, river sand resources are being depleted. In recent years, mountain sand and sea sand have been increasingly used in place of river sand. Especially in the Kanto region, mountain sand is often used as a substitute for river sand, but mountain sand contains a lot of soft stones such as clayey chunks and earth mass, and these soft stones are contained in sand. As a result, the properties of specific gravity and water absorption deteriorate, and there is a problem that it is difficult to use as an aggregate for concrete. Therefore, conventionally, crushing of soft stones contained in sand is often performed using a rod mill or a ball mill, but the crushing process using these devices involves loading raw material sand such as rods and balls. Since it is a complete batch process in which the material is filled into a cylinder together with the material (crushing medium) and rotated for a long time and then taken out, the raw material is easily over-crushed or under-crushed,
It was difficult to efficiently pulverize only soft stone to obtain good quality aggregate.

In view of such circumstances, the applicant of the present application has previously disclosed in Japanese Patent No. 2863158 the outer peripheral surface of a hollow rotating body provided with a required number of loading materials (crushing media) in communication with the interior. A fine pulverizer provided with a plurality of openings serving both as an inlet and an outlet for a pulverized material has been proposed. According to the fine pulverizer according to the present applicant's creation, the pulverization efficiency is higher than that of a conventional rod mill or ball mill, and it is excellent in that overpulverization does not easily occur. Since the time is easily shortened, insufficient pulverization may occur, and this point has not been sufficiently satisfactory.

On the other hand, a huge amount of concrete waste is generated due to the demolition of buildings and the like, and such waste has been conventionally disposed of in landfills. From the viewpoint of the problem. Therefore, a method of obtaining recycled aggregate by crushing waste concrete generated by demolition of buildings and the like is being developed, but mortar adheres to the surface of the recycled aggregate obtained by crushing concrete waste. As a result, there is a problem that the water absorption is high and it is difficult to use it as a concrete aggregate.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above circumstances, and has been developed as a concrete aggregate from a raw material consisting of mountain sand and concrete waste, which is often used as a substitute for river sand. It is an object of the present invention to provide a fine pulverizer capable of recovering usable high quality recycled aggregate.

[0006]

The invention according to claim 1 is
A hollow rotating body having a plurality of openings serving also as inlets and outlets of the crushed object and rotating by taking in the crushed object therein, and a required number of loading materials loaded inside the hollow rotator, A fine crusher for crushing an object to be crushed by an ascending and descending movement of a charge material accompanying rotation of a hollow rotator, wherein the hollow rotator is disposed in a container into which the crushed object is charged, and an upper portion of the container The present invention relates to a pulverizer in which a supply port for a material to be crushed is provided, and a discharge port for a material to be crushed is provided at a lower portion. The invention according to claim 2 relates to the fine pulverizer according to claim 1, wherein a plurality of hollow rotary bodies are arranged in the container along the flow direction of the material to be pulverized. In the invention according to claim 3, a supply port of a container provided with another hollow rotator is connected to a discharge port of the container provided with the hollow rotator, and the flow rate of the material to be crushed is connected to the connection portion. 2. The pulverizer according to claim 1, further comprising a valve for adjusting. The invention according to claim 4 relates to the fine pulverizer according to any one of claims 1 to 3, wherein a detection means for detecting an amount of the material to be pulverized in the container is provided. The invention according to claim 5 is characterized in that a valve for opening the discharge port after a lapse of a predetermined time from the introduction of the material to be ground is attached to the discharge port.
A pulverizer according to any one of the above.

According to a sixth aspect of the present invention, there is provided a hollow rotator having a plurality of openings serving both as an inlet and an outlet of a material to be crushed, and rotating by taking in the material to be crushed, and loading the inside of the hollow rotator. And a required number of charged materials, and a pulverizer that pulverizes the material to be crushed by the ascending and descending motion of the charged material with the rotation of the hollow rotary body, wherein the hollow rotary body is charged with the material to be ground. It is arranged in a container, and the container is provided with a supply port for the material to be ground near the one end in the rotation axis direction of the hollow rotary body and a discharge port for the material to be ground near the other end. And a pulverizer. The invention according to claim 7 relates to the fine pulverizer according to claim 6, wherein the discharge port of the object to be pulverized is formed to be openable and closable. Claim 8
The invention according to the invention relates to the fine pulverizer according to any one of claims 1 to 7, wherein a rotation direction of the hollow rotary body is reversed every predetermined time.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a pulverizer according to the present invention will be described below with reference to the drawings. FIG. 1 is a schematic sectional front view showing a first embodiment of a pulverizer according to the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a side view thereof. The pulverizer according to the present invention comprises: a hollow rotating body (1) that rotates by taking in an object to be ground; a required number of loading materials (grinding media) loaded inside the hollow rotating body (1); A container (6) in which a hollow rotating body (1) is disposed and into which an object to be ground is charged is provided as a main configuration.

FIG. 4 is a front view of the hollow rotating body (1), FIG. 5 is a sectional view taken along line AA of FIG. 4, and FIG. 6 is a sectional view taken along line BB of FIG. The hollow rotating body (1) has a cylindrical shape and has a plurality of openings (4) communicating with the inside on the outer peripheral surface thereof,
A plurality of loading materials (2) are loaded therein. Then, the object to be ground is taken into the inside of the hollow rotary body (1) from the opening (4), and is pulverized by the ascending and descending motion of the charge (2) accompanying the rotation of the hollow rotary body (1). It is discharged to the outside through the opening (4).

In the illustrated example, an example in which a rod is used as the loading material (2) is shown. However, in the present invention, the type of the loading material (2) is not limited to this, and other known materials such as balls are used. A shaped charge may be used. It is preferable to set the diameter and the number of the charging material (2) so that the filling rate is about 40 to 50% from the viewpoint of the pulverization efficiency. However, loading material (2)
Is of course set to such a size that does not protrude outside through the opening (4). Opening (4)
The diameter and number of the particles are not limited, and may be appropriately set according to conditions such as the size of the hollow rotary body (1), the type of the material to be ground, and the desired particle size of the material to be ground after the grinding.

FIG. 7 is an external view showing a first modification of the charging material (2). FIG. 8 is a sectional view taken along line AA of FIG.
FIG. 8 is a sectional view taken along line BB of FIG. 7. The loading material (2) shown in FIG.
Has a hollow cylindrical shape and is provided with a large number of through holes (21) communicating with the inside on the outer peripheral surface, and a plurality of rod-shaped core members (22) are loaded inside. 10 and 11
FIG. 3 is an external view and a sectional view showing a second modification of the charging material (2). The loading material (2) of this example is a hollow sphere obtained by combining two hemispheres, and is provided with a plurality of through holes (21) communicating with the inside on the outer peripheral surface, and a plurality of spherical core materials inside. (23) is loaded. 12 and 13 are an external view and a sectional view, respectively, showing a third modification of the charging material (2). The loading material (2) of this example is hollow cubic and has a plurality of through holes (21) communicating with the inside on the outer peripheral surface, and a plurality of spherical core materials (23) inside. Have been. By loading the charging material (2) according to these modified examples into the hollow rotary body (1), the material to be pulverized is reduced to the outer surface of the charging material (2) and the core material (22) ( 23) It becomes possible to carry out pulverization, and it becomes possible to carry out the pulverization work extremely efficiently.

The hollow rotary body (1) is driven to rotate by rotation of a drive shaft of a motor connected to a center shaft (8) via a bearing and a transmission (not shown). However,
In the pulverizer according to the present invention, the rotation drive mechanism of the hollow rotary body (1) is not limited at all, and any of the drive mechanisms used in known rod mills and ball mills can be suitably used.

In the present invention, the shape of the hollow rotary body (1) is not limited to the cylindrical shape shown in the figure, but may be a rectangular cylinder, hexagonal cylinder, octagonal cylinder, spherical, elliptical cylinder, or the like. Various shapes can be adopted as long as they have an internal space in which the material (2) and the material to be crushed can be put inside and an opening (4) for flowing the material to be crushed.

The hollow rotator (1) is disposed inside a hopper-like container (6) into which the material to be crushed is charged, and its central axis (8) passes through the wall surface of the container (6). And is rotatably supported by bearings (not shown). The container (6) has a substantially funnel shape in which the inner area (cross-sectional area) decreases toward the lower end, the upper end of which is a supply port (7) for the material to be crushed, and the lower end is the supply port (7) for the material to be crushed. It is an outlet (5). The crushed object put into the container (6) from the supply port (7) descends in the container (6) by its own weight, and is introduced into the hollow rotary body (1) from the opening (4) described above. After being crushed by the loading material (2), it is discharged to the outside through the discharge port (5) at the lower end.

At a predetermined position inside or outside the container (6), it is preferable to attach a detecting means (not shown) for detecting the amount (volume) of the material to be ground in the container (6). . Although the configuration of this detection means is not particularly limited,
For example, there is a configuration in which when a crushed object in a container exceeds a certain amount, this is detected by a sensor such as an infrared sensor. By providing such a detecting means, the amount of the crushed material in the container (6) can always be kept substantially constant, and the residence time of the crushed material in the container can be made substantially constant. By knowing the optimum residence time in advance, it is possible to prevent excessive or insufficient pulverization.

Also, a valve (not shown) is attached to the discharge port (5) of the container (6) so that the discharge port can be opened and closed by opening and closing the valve. A configuration in which the valve is closed to close the discharge port (5), and after a predetermined time has elapsed, the valve is opened to open the discharge port (5) can also be preferably employed. Note that the opening and closing control of the valve at this time can be performed by known means such as a combination of a timer and an electromagnetic valve. Even by attaching such a valve, the residence time of the object to be ground in the container can be made substantially constant, so that by grasping the optimal residence time in advance, it is possible to prevent excessive or insufficient grinding. .

Further, in the present invention, the hollow rotating body (1)
It is preferable that the rotation direction is reversed every predetermined time. The reversal of the rotation direction can be easily achieved by, for example, switching the polarity of the power supply applied to the motor every predetermined time. With such a configuration, the material to be ground in the container (6) is agitated. Thus, the processing efficiency of the pulverization is further improved.

FIG. 14 is a schematic sectional view showing a second embodiment of the pulverizer according to the present invention. The pulverizer of the second embodiment has two hollow rotating bodies (1) in one container (6).
a) and (1b) are provided. In addition, the hollow rotator (1
As the configurations of a) and (1b), those described in the first embodiment are preferably used. However, other configurations having the above-described opening and the charging material may be used. Good. The container (6) is disposed so that its bottom surface is inclined obliquely downward. The supply port (7) for the material to be crushed is provided at the upper end, and the discharge port (5) for the material to be crushed is provided at the lower end. Each is provided. The object to be ground supplied from the supply port (7) into the container (6) flows obliquely downward in the container (6) and is discharged from the discharge port (5). Two hollow rotating bodies (1a),
(1b) is arranged in a line along the flow direction of the objects to be pulverized supplied into the container (6), that is, obliquely downward.
In the second embodiment, two hollow rotating bodies (1
a) and (1b) may be arranged such that the one near the supply port (7) is at a high position and the one near the discharge port (5) is at a low position. The relationship is not limited to the illustrated example.

In the pulverizer according to the second embodiment, the material to be pulverized introduced into the supply port (7) of the container (6) descends obliquely downward in the container (6) by its own weight. After being introduced into the inside from the opening of the hollow rotary body (1a) and pulverized by the charging material, it is then introduced into the inside of the second hollow rotating body (1b) by the charging material and pulverized by the charging material. It is discharged to the outside from the discharge port (5).

According to the pulverizer of the second embodiment, 2
Since the pulverizing process can be performed by the two hollow rotating bodies, the pulverizing processing capability is high, and the installation area can be smaller than when two fine pulverizers are separately installed. Also,
For example, when a hard soft stone and a soft soft stone are contained in the object to be crushed, the soft soft stone can be crushed in the first hollow rotator, and the hard soft stone that cannot be crushed in the first hollow rotator can be used. Can be crushed in the second hollow rotator, so that a high-quality aggregate can be efficiently obtained in a short time.

FIG. 15 is a schematic sectional view showing a third embodiment of the pulverizer according to the present invention. The pulverizer according to the third embodiment comprises two hollow rotating bodies (1a) and (1b) each having the above-described opening and the charging material, which are arranged in a vertical positional relationship on a vertical line. is there. In the third embodiment, the configuration of the hollow rotary members (1a) and (1b) described in the first embodiment is preferably used. And
The two hollow rotors (1a) and (1b) are disposed inside separate containers (6) and (16), respectively, and the container in which the first hollow rotor (1a) is disposed. The supply port (17) at the upper end of the container (16) in which the second hollow rotator (1b) is disposed is connected to the discharge port (5) at the lower end of (6), and the discharge port (5) is connected. 5) A valve (13) is attached to a connection passage connecting the supply port (17) and the opening and closing of this valve to adjust the flow rate of the material to be crushed moving from the container (6) to the container (16). Can be. The lower end of the container (16) in which the second hollow rotary body (1b) is disposed is used as a discharge port (15) for the material to be ground.
A valve (14) is attached to 5), and the discharge port (15) can be opened and closed by opening and closing the valve (14).

In the fine pulverizer according to the third embodiment, the material to be pulverized is first introduced into the supply port (7) of the container (6), and descends in the container (6) by its own weight. (1a)
After being introduced into the inside of the container and pulverized by the charging material, it enters the container (16) from the supply port (17) through the connection passageway (12) from the discharge port (5) at the lower end, and the second hollow rotary It is introduced into the body (1b), pulverized by the charge material, and finally discharged to the outside from the discharge port (15).

According to the pulverizer of the third embodiment, 2
Since the pulverization can be performed by the two hollow rotating bodies, the pulverization processing capacity is high, and the installation area is sufficient for one unit, so that it can be installed even in a small space. In addition, a valve (13) is attached to a connection passage connecting the container in which the first hollow rotator is provided and the container in which the second hollow rotator is provided, and the second hollow rotator is provided. Since the valve (14) is attached to the discharge port (15) of the installed container, the crushing processing time by the first hollow rotator (1a) and the second hollow rotator (1b) can be adjusted by opening and closing the valve. It can be adjusted by the operation, and high quality aggregate can be obtained efficiently in a short time.

Although not shown, in the present invention, three or more hollow rotors can be arranged in the same configuration as that shown in FIGS. 14 and 15. By increasing the number, it is possible to obtain a higher pulverizing capacity. Further, it is also possible to adopt a configuration in which the diameters of the openings of the plurality of hollow rotators are made different, for example, by increasing the diameter of the openings of the hollow rotator on the upstream side of the flow of the material to be crushed, When the diameter of the opening of the rotating body is reduced, a desired aggregate can be more efficiently obtained.

The pulverizing process using the fine pulverizer according to the present invention described above may be performed by a dry process using no water or a wet process using water. However, in the case of performing a dry treatment without using water, it is preferable to attach a vibrator for vibrating the hollow rotary body in order to quickly discharge the pulverized components to the outside of the hollow rotary body. This prevents over-pulverization due to the components already crushed to the desired particle size remaining inside the hollow rotary body for a long time. As another means for preventing over-crushing, air is introduced from the supply port (7) into the container (5), and a suction device is connected to the discharge port (5) or the discharge port (15) via a duct. Accordingly, a configuration in which the pulverized components are forcibly discharged from the container (5) or the container (15) by an air stream can be preferably adopted. According to this configuration, it is possible to prevent excessive pulverization due to the component already pulverized to the desired particle diameter being introduced again into the hollow rotary body and pulverized again.

FIG. 16 is an external view showing a third embodiment of the fine pulverizer according to the present invention, FIG. 17 is an axial sectional view of FIG. 16, and FIG. 18 is a sectional view perpendicular to the axis of FIG. The fine crusher of the third embodiment also has a plurality of openings (4) serving also as an inlet and an outlet of a material to be crushed, and has a hollow rotary body that takes in the material to be crushed and rotates, similarly to the above-described embodiment. (1) and a required number of loading materials (2) loaded inside the hollow rotary body (1)
And is configured to crush the object to be crushed by the ascending and descending motion of the charge (2) accompanying the rotation of the hollow rotary body (1).

The hollow rotating body (1) is disposed in a container (6) into which the material to be ground is charged. In the illustrated example, the hollow rotator (1) has a cylindrical shape, the container (6) has a cylindrical shape slightly larger than the hollow rotator (1), and has an outer peripheral surface of the hollow rotator (1). There is a gap between them. The container (6) is provided with a supply port (7) for the material to be ground near the one end in the rotation axis direction of the hollow rotary body (1), and a discharge port (5) for the material to be ground near the other end. Have been. The supply port (7) is formed in a cylindrical shape so as to protrude from the upper surface of the container (6), and the discharge port (5) is formed from an opening cut in a rectangular shape from the upper surface to the side surface of the container (6). I have. The discharge port (7) is provided with a slidable lid (51) as shown by an arrow so as to open and close the opening.

In the fine pulverizer of the third embodiment, the material to be pulverized introduced into the container (6) from the supply port (7) is opened from near one end of the hollow rotary body (1) in the direction of the rotation axis. Is introduced into the hollow rotary body through the portion (4), and the powder (2) is pulverized by the ascending and descending motion of the loading material (2) while repeatedly entering and exiting the opening (4) with the rotation of the hollow rotary body (1). Is done. Then, after rotating the hollow rotating body (1) for a predetermined time, the lid (51) is slid downward to open the discharge port (7), whereby the crushed object crushed to a predetermined size. Can be taken out from the discharge port (7). Here, since the material to be crushed must move at least from one end to the other end of the hollow rotator (1) before the crushed object is taken out from the discharge port (7), the inside of the hollow rotator (1) is moved. It is possible to secure a relatively long residence time of the object to be ground in the above, prevent insufficient pulverization, and obtain excellent pulverization processing efficiency.

[0029]

EXAMPLES The effects of the present invention will be clarified by showing the results of experiments using the pulverizer according to the present invention. However, the present invention is not limited to the following examples. (Example) Concrete crusher (Haldpact)
After the aggregate having a particle size of 20 to 40 mm obtained by primary crushing was subjected to secondary crushing with a grinding machine (rod mill), the crushed material was passed through a vibrating sieve to take out a component of 0 to 10 mm, which was used as a raw material. The absolute dry specific gravity of this raw material is 2.25 to 2.3.
8. The water absorption was 5.08 to 5.46%.

As the fine pulverizer, a twin-pulverizer shown in FIG. 14 is used, and as the first hollow rotary body (1a), an inner diameter φ
560 mm × inner width 1310 mm cylindrical type, inner diameter φ560 mm × inner width 10 as second hollow rotating body (1 b)
A 10 mm cylindrical one was used. Balls (φ110 mm, weight 5.3 kg × 160 pieces) were used as the loading material of the first hollow rotating body, and balls (φ90 mm, weight 2 pieces) were used as the loading material of the second hollow rotating body. 0.9 kg × 280 pieces). The porosity when the above-mentioned loading material is loaded is 65.5 for the first hollow rotating body.
%, And the second hollow rotating body was 57.0%.

In the experiment, the raw materials were converted to the first hollow rotating body (1).
This was carried out by wet processing by charging the container (6) provided with a) into the supply port (7) and rotating the first and second hollow rotators at 60 rpm respectively. Discharge port (15) of container (16) in which second hollow rotator (1b) is arranged
The valve (14) was closed when the raw material was charged, and opened one hour after the start of the pulverizing process by the rotation of the hollow rotary body.

The absolute specific gravity and the water absorption of the pulverized product taken out from the discharge port (15) were measured. The absolute specific gravity was 2.53 to 2.62, and the water absorption was 2.59 to 2.93%.
It satisfies all the criteria for the quality of the aggregate for concrete, namely, the absolute dry specific gravity of 2.5 or more and the water absorption of 3% or less.

[0033]

As described above, according to the first aspect of the present invention, there is provided a hollow rotator having a plurality of openings serving both as an inlet and an outlet of a crushed object, and rotating by taking the crushed object therein.
A pulverizer comprising a required number of loading materials loaded inside the hollow rotator, and crushing the object to be crushed by the ascending and descending movement of the loading material accompanying rotation of the hollow rotator, Is provided in a container into which the material to be crushed is charged, and a supply port for the material to be crushed is provided at an upper portion of the container, and a discharge port for the material to be crushed is provided at a lower portion thereof. The following effects can be obtained because the present invention is used. That is, the material to be crushed, which has been put into the container from the supply port, descends in the container by its own weight, is introduced into the inside of the hollow rotating body, is crushed, and is discharged from the discharge port. Excessive crushing by staying inside the hollow rotating body for a long time is prevented, and high-quality recycled aggregate with a high recovery rate while reliably removing impurities such as soft stones contained in mountain sand and mortar adhering to concrete waste. Can be obtained.

According to a second aspect of the present invention, there is provided the fine pulverizer according to the first aspect, wherein a plurality of hollow rotary bodies are arranged in the container along the flow direction of the material to be ground. Thus, an excellent fine pulverizer having a small installation area and high crushing capacity can be obtained. In the invention according to claim 3, a supply port of a container provided with another hollow rotator is connected to a discharge port of the container provided with the hollow rotator, and the flow rate of the material to be crushed is connected to the connection portion. The fine pulverizer according to claim 1, characterized in that a valve for adjustment is provided, so that a small crushing capacity can be obtained with a small installation area, and a desired object can be obtained by opening and closing the valve. Easy to adjust to particle size. The invention according to claim 4 is characterized in that detection means for detecting the amount of the material to be ground in the container is provided.
Since the pulverizer according to any one of (1) to (3), the amount of the material to be pulverized in the container can always be kept substantially constant,
Since the residence time of the object to be crushed in the container can be made substantially constant, it is possible to prevent excessive or insufficient pulverization by grasping the optimal residence time in advance. The invention according to claim 5 is characterized in that the discharge port is provided with a valve that opens the discharge port after a lapse of a predetermined time from the introduction of the material to be crushed, according to any one of claims 1 to 4, Therefore, the residence time of the object to be crushed in the container can be made substantially constant, so that excessive or insufficient crushing can be prevented.

According to a sixth aspect of the present invention, there is provided a hollow rotator having a plurality of openings serving both as an inlet and an outlet for a crushed object, and rotating the intake crushed object inside, and loading the hollow rotator into the hollow rotator. And a required number of charged materials, and a pulverizer that pulverizes the material to be crushed by the ascending and descending motion of the charged material with the rotation of the hollow rotary body, into which the material to be ground is charged. It is arranged in a container, and the container is provided with a supply port for the material to be ground near the one end in the rotation axis direction of the hollow rotary body and a discharge port for the material to be ground near the other end. It is possible to ensure a relatively long residence time of the object to be crushed inside the hollow rotary body, and to prevent the occurrence of insufficient crushing and to obtain excellent crushing efficiency. . The invention according to claim 7 is the fine crusher according to claim 6, wherein the discharge port of the object to be crushed is formed to be openable and closable, so that the container of the object to be crushed by opening and closing the discharge port. The dwell time within can be adjusted. The invention according to claim 8 is the fine pulverizer according to any one of claims 1 to 7, wherein the rotation direction of the hollow rotator is configured to be reversed every predetermined time. The object to be ground in the container is agitated, and the processing efficiency of the grinding is further enhanced.

[Brief description of the drawings]

FIG. 1 is a schematic sectional front view showing a first embodiment of a pulverizer according to the present invention.

FIG. 2 is a schematic plan view showing a first embodiment of a pulverizer according to the present invention.

FIG. 3 is a schematic sectional side view showing a first embodiment of the fine pulverizer according to the present invention.

FIG. 4 is a front view of a hollow rotating body.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a sectional view taken along line BB of FIG. 4;

FIG. 7 is an external view showing a first modification of the loading material.

FIG. 8 is a sectional view taken along line AA of FIG. 7;

FIG. 9 is a sectional view taken along line BB of FIG. 7;

FIG. 10 is an external view showing a second modification of the charging material.

FIG. 11 is a cross-sectional view showing a second modification of the charging material.

FIG. 12 is an external view showing a third modification of the loading material.

FIG. 13 is a sectional view showing a third modification of the charge material.

FIG. 14 is a schematic sectional view showing a second embodiment of the pulverizer according to the present invention.

FIG. 15 is a schematic sectional view showing a third embodiment of the pulverizer according to the present invention.

FIG. 16 is an external view showing a third embodiment of the pulverizer according to the present invention.

17 is an axial sectional view of FIG. 16;

FIG. 18 is a sectional view taken along a direction perpendicular to the axis of FIG. 16;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hollow rotating body 1a 1st hollow rotating body 1b 2nd hollow rotating body 2 Charge 4 Opening 6 Container 7 Supply port 5 Discharge port 12 Connection passage 13 Valve 14 Valve 15 Discharge port 16 Container 17 Supply port

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[Procedure amendment]

[Submission date] February 1, 2001 (2001.2.1)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Fine grinding machine

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fine pulverizer, and more particularly to a fine pulverizer capable of recovering high-quality recycled aggregate usable as concrete aggregate from raw materials such as mountain sand and concrete waste. Is to provide.

[0002]

2. Description of the Related Art Conventionally, in Japan, sand collected from rivers has been used as a raw material for aggregate for concrete. However, as a result of continuous collection of sand for many years, river sand resources are being depleted. In recent years, mountain sand and sea sand have been increasingly used in place of river sand. Especially in the Kanto region, mountain sand is often used as a substitute for river sand, but mountain sand contains a lot of soft stones such as clayey chunks and earth mass, and these soft stones are contained in sand. As a result, the properties of specific gravity and water absorption deteriorate, and there is a problem that it is difficult to use as an aggregate for concrete. Therefore, conventionally, crushing of soft stones contained in sand is often performed using a rod mill or a ball mill, but the crushing process using these devices involves loading raw material sand such as rods and balls. Since it is a complete batch process in which the material is filled into a cylinder together with the material (crushing medium) and rotated for a long time and then taken out, the raw material is easily over-crushed or under-crushed,
It was difficult to efficiently pulverize only soft stone to obtain good quality aggregate.

In view of such circumstances, the applicant of the present application has previously disclosed in Japanese Patent No. 2863158 the outer peripheral surface of a hollow rotating body provided with a required number of loading materials (crushing media) in communication with the interior. A fine pulverizer provided with a plurality of openings serving both as an inlet and an outlet for a pulverized material has been proposed. According to the fine pulverizer according to the present applicant's creation, the pulverization efficiency is higher than that of a conventional rod mill or ball mill, and it is excellent in that overpulverization does not easily occur. Since the time is easily shortened, insufficient pulverization may occur, and this point has not been sufficiently satisfactory.

On the other hand, a huge amount of concrete waste is generated due to the demolition of buildings and the like, and such waste has been conventionally disposed of in landfills. From the viewpoint of the problem. Therefore, a method of obtaining recycled aggregate by crushing waste concrete generated by demolition of buildings and the like is being developed, but mortar adheres to the surface of the recycled aggregate obtained by crushing concrete waste. As a result, there is a problem that the water absorption is high and it is difficult to use it as a concrete aggregate.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above circumstances, and has been developed as a concrete aggregate from a raw material consisting of mountain sand and concrete waste, which is often used as a substitute for river sand. It is an object of the present invention to provide a fine pulverizer capable of recovering usable high quality recycled aggregate.

[0006]

The invention according to claim 1 is
A hollow rotating body having a plurality of openings serving also as inlets and outlets of the crushed object and rotating by taking in the crushed object therein, and a required number of loading materials loaded inside the hollow rotator, A fine crusher for crushing an object to be crushed by an ascending and descending movement of a charge material accompanying rotation of a hollow rotator, wherein the hollow rotator is disposed in a container into which the crushed object is charged, and an upper portion of the container A container in which a supply port for the object to be ground is provided, and a discharge port for the object to be ground is provided in the lower part, and another hollow rotary body is provided in the discharge port of the container in which the hollow rotary body is provided. And a valve for adjusting the flow rate of the material to be crushed is provided at the connection portion.

According to a second aspect of the present invention, there is provided a hollow rotator having a plurality of openings serving both as an inlet and an outlet for a crushed object, and rotatably taking in the crushed object and rotating the hollow rotator. And a required number of charged materials, and a pulverizer that pulverizes the material to be crushed by the ascending and descending motion of the charged material with the rotation of the hollow rotary body, into which the material to be ground is charged. Disposed in a container, the container is provided with a supply port for the material to be ground near one end in the rotation axis direction of the hollow rotary body and a discharge port for the material to be ground near the other end, and the discharge port is The present invention relates to a pulverizer characterized by being formed with an opening cut out from an upper surface to a side surface of a container, and having a slidable lid provided in the opening.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a pulverizer according to the present invention will be described below with reference to the drawings. FIG. 1 is a schematic sectional front view showing a first embodiment of a pulverizer according to the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a side view thereof. The pulverizer according to the present invention comprises: a hollow rotating body (1) that rotates by taking in an object to be ground; a required number of loading materials (grinding media) loaded inside the hollow rotating body (1); A container (6) in which a hollow rotating body (1) is disposed and into which an object to be ground is charged is provided as a main configuration.

FIG. 4 is a front view of the hollow rotating body (1), FIG. 5 is a sectional view taken along line AA of FIG. 4, and FIG. 6 is a sectional view taken along line BB of FIG. The hollow rotating body (1) has a cylindrical shape and has a plurality of openings (4) communicating with the inside on the outer peripheral surface thereof,
A plurality of loading materials (2) are loaded therein. Then, the object to be ground is taken into the inside of the hollow rotary body (1) from the opening (4), and is pulverized by the ascending and descending motion of the charge (2) accompanying the rotation of the hollow rotary body (1). It is discharged to the outside through the opening (4).

In the illustrated example, an example in which a rod is used as the loading material (2) is shown. However, in the present invention, the type of the loading material (2) is not limited to this, and other known materials such as balls are used. A shaped charge may be used. It is preferable to set the diameter and the number of the charging material (2) so that the filling rate is about 40 to 50% from the viewpoint of the pulverization efficiency. However, loading material (2)
Is of course set to such a size that does not protrude outside through the opening (4). Opening (4)
The diameter and number of the particles are not limited, and may be appropriately set according to conditions such as the size of the hollow rotary body (1), the type of the material to be ground, and the desired particle size of the material to be ground after the grinding.

FIG. 7 is an external view showing a first modification of the charging material (2). FIG. 8 is a sectional view taken along line AA of FIG. 7, and FIG. 9 is a sectional view taken along line BB of FIG. It is. The loading material (2) shown in FIG.
Has a hollow cylindrical shape and is provided with a large number of through holes (21) communicating with the inside on the outer peripheral surface, and a plurality of rod-shaped core members (22) are loaded inside. 10 and 11
FIG. 3 is an external view and a sectional view showing a second modification of the charging material (2). The loading material (2) of this example is a hollow sphere obtained by combining two hemispheres, and is provided with a plurality of through holes (21) communicating with the inside on the outer peripheral surface, and a plurality of spherical core materials inside. (23) is loaded. 12 and 13 are an external view and a sectional view, respectively, showing a third modification of the charging material (2). The loading material (2) of this example is hollow cubic and has a plurality of through holes (21) communicating with the inside on the outer peripheral surface, and a plurality of spherical core materials (23) inside. Have been. By loading the charging material (2) according to these modified examples into the hollow rotary body (1), the material to be pulverized is reduced to the outer surface of the charging material (2) and the core material (22) ( 23) It becomes possible to carry out pulverization, and it becomes possible to carry out the pulverization work extremely efficiently.

The hollow rotary body (1) is driven to rotate by rotation of a drive shaft of a motor connected to a center shaft (8) via a bearing and a transmission (not shown). However,
In the pulverizer according to the present invention, the rotation drive mechanism of the hollow rotary body (1) is not limited at all, and any of the drive mechanisms used in known rod mills and ball mills can be suitably used.

In the present invention, the shape of the hollow rotary body (1) is not limited to the cylindrical shape shown in the figure, but may be a rectangular cylinder, hexagonal cylinder, octagonal cylinder, spherical, elliptical cylinder, or the like. Various shapes can be adopted as long as they have an internal space in which the material (2) and the material to be crushed can be put inside and an opening (4) for flowing the material to be crushed.

The hollow rotator (1) is disposed inside a hopper-like container (6) into which the material to be crushed is charged, and its central axis (8) passes through the wall surface of the container (6). And is rotatably supported by bearings (not shown). The container (6) has a substantially funnel shape in which the inner area (cross-sectional area) decreases toward the lower end, the upper end of which is a supply port (7) for the material to be crushed, and the lower end is the supply port (7) for the material to be crushed. It is an outlet (5). The crushed object put into the container (6) from the supply port (7) descends in the container (6) by its own weight, and is introduced into the hollow rotary body (1) from the opening (4) described above. After being crushed by the loading material (2), it is discharged to the outside through the discharge port (5) at the lower end.

At a predetermined position inside or outside the container (6), it is preferable to attach a detecting means (not shown) for detecting the amount (volume) of the material to be ground in the container (6). . Although the configuration of this detection means is not particularly limited,
For example, there is a configuration in which when a crushed object in a container exceeds a certain amount, this is detected by a sensor such as an infrared sensor. By providing such a detecting means, the amount of the crushed material in the container (6) can always be kept substantially constant, and the residence time of the crushed material in the container can be made substantially constant. By knowing the optimum residence time in advance, it is possible to prevent excessive or insufficient pulverization.

Also, a valve (not shown) is attached to the discharge port (5) of the container (6) so that the discharge port can be opened and closed by opening and closing the valve. A configuration in which the valve is closed to close the discharge port (5), and after a predetermined time has elapsed, the valve is opened to open the discharge port (5) can also be preferably employed. Note that the opening and closing control of the valve at this time can be performed by known means such as a combination of a timer and an electromagnetic valve. Even by attaching such a valve, the residence time of the object to be ground in the container can be made substantially constant, so that by grasping the optimal residence time in advance, it is possible to prevent excessive or insufficient grinding. .

Further, in the present invention, the hollow rotating body (1)
It is preferable that the rotation direction is reversed every predetermined time. The reversal of the rotation direction can be easily achieved by, for example, switching the polarity of the power supply applied to the motor every predetermined time. With such a configuration, the material to be ground in the container (6) is agitated. Thus, the processing efficiency of the pulverization is further improved.

FIG. 14 is a schematic sectional view showing a second embodiment of the pulverizer according to the present invention. The pulverizer of the second embodiment has two hollow rotating bodies (1) in one container (6).
a) and (1b) are provided. In addition, the hollow rotator (1
As the configurations of a) and (1b), those described in the first embodiment are preferably used. However, other configurations having the above-described opening and the charging material may be used. Good. The container (6) is disposed so that its bottom surface is inclined obliquely downward. The supply port (7) for the material to be crushed is provided at the upper end, and the discharge port (5) for the material to be crushed is provided at the lower end. Each is provided. The object to be ground supplied from the supply port (7) into the container (6) flows obliquely downward in the container (6) and is discharged from the discharge port (5). Two hollow rotating bodies (1a),
(1b) is arranged in a line along the flow direction of the objects to be pulverized supplied into the container (6), that is, obliquely downward.
In the second embodiment, two hollow rotating bodies (1
a) and (1b) may be arranged such that the one near the supply port (7) is at a high position and the one near the discharge port (5) is at a low position. The relationship is not limited to the illustrated example.

In the pulverizer according to the second embodiment, the material to be pulverized introduced into the supply port (7) of the container (6) descends obliquely downward in the container (6) by its own weight. After being introduced into the inside from the opening of the hollow rotary body (1a) and pulverized by the charging material, it is then introduced into the inside of the second hollow rotating body (1b) by the charging material and pulverized by the charging material. It is discharged to the outside from the discharge port (5).

According to the pulverizer of the second embodiment, 2
Since the pulverizing process can be performed by the two hollow rotating bodies, the pulverizing processing capability is high, and the installation area can be smaller than when two fine pulverizers are separately installed. Also,
For example, when a hard soft stone and a soft soft stone are contained in the object to be crushed, the soft soft stone can be crushed in the first hollow rotator, and the hard soft stone that cannot be crushed in the first hollow rotator can be used. Can be crushed in the second hollow rotator, so that a high-quality aggregate can be efficiently obtained in a short time.

FIG. 15 is a schematic sectional view showing a third embodiment of the pulverizer according to the present invention. The pulverizer according to the third embodiment comprises two hollow rotating bodies (1a) and (1b) each having the above-described opening and the charging material, which are arranged in a vertical positional relationship on a vertical line. is there. In the third embodiment, the configuration of the hollow rotary members (1a) and (1b) described in the first embodiment is preferably used. And
The two hollow rotors (1a) and (1b) are disposed inside separate containers (6) and (16), respectively, and the container in which the first hollow rotor (1a) is disposed. The supply port (17) at the upper end of the container (16) in which the second hollow rotator (1b) is disposed is connected to the discharge port (5) at the lower end of (6), and the discharge port (5) is connected. 5) A valve (13) is attached to a connection passage connecting the supply port (17) and the opening and closing of this valve to adjust the flow rate of the material to be crushed moving from the container (6) to the container (16). Can be. The lower end of the container (16) in which the second hollow rotary body (1b) is disposed is used as a discharge port (15) for the material to be ground.
A valve (14) is attached to 5), and the opening (15) can be opened and closed by opening and closing the valve (14).

In the fine pulverizer according to the third embodiment, the material to be pulverized is first introduced into the supply port (7) of the container (6), and descends in the container (6) by its own weight. (1a)
After being introduced into the inside of the container and pulverized by the charging material, it enters the container (16) from the supply port (17) through the connection passageway (12) from the discharge port (5) at the lower end, and the second hollow rotary It is introduced into the body (1b), pulverized by the charge material, and finally discharged to the outside from the discharge port (15).

According to the pulverizer of the third embodiment, 2
Since the pulverization can be performed by the two hollow rotating bodies, the pulverization processing capacity is high, and the installation area is sufficient for one unit, so that it can be installed even in a small space. In addition, a valve (13) is attached to a connection passage connecting the container in which the first hollow rotator is provided and the container in which the second hollow rotator is provided, and the second hollow rotator is provided. Since the valve (14) is attached to the discharge port (15) of the installed container, the crushing processing time by the first hollow rotator (1a) and the second hollow rotator (1b) can be adjusted by opening and closing the valve. It can be adjusted by the operation, and high quality aggregate can be obtained efficiently in a short time.

Although not shown, in the present invention, three or more hollow rotors can be arranged in the same configuration as that shown in FIGS. 14 and 15. By increasing the number, it is possible to obtain a higher pulverizing capacity. Further, it is also possible to adopt a configuration in which the diameters of the openings of the plurality of hollow rotators are made different, for example, by increasing the diameter of the openings of the hollow rotator on the upstream side of the flow of the material to be crushed, When the diameter of the opening of the rotating body is reduced, a desired aggregate can be more efficiently obtained.

The pulverizing process using the fine pulverizer according to the present invention described above may be performed by a dry process using no water or a wet process using water. However, in the case of performing a dry treatment without using water, it is preferable to attach a vibrator for vibrating the hollow rotary body in order to quickly discharge the pulverized components to the outside of the hollow rotary body. This prevents over-pulverization due to the components already crushed to the desired particle size remaining inside the hollow rotary body for a long time. As another means for preventing over-crushing, air is introduced from the supply port (7) into the container (5), and a suction device is connected to the discharge port (5) or the discharge port (15) via a duct. Accordingly, a configuration in which the pulverized components are forcibly discharged from the container (5) or the container (15) by an air stream can be preferably adopted. According to this configuration, it is possible to prevent excessive pulverization due to the component already pulverized to the desired particle diameter being introduced again into the hollow rotary body and pulverized again.

FIG. 16 is an external view showing a third embodiment of the fine pulverizer according to the present invention, FIG. 17 is an axial sectional view of FIG. 16, and FIG. 18 is a sectional view perpendicular to the axis of FIG. The fine crusher of the third embodiment also has a plurality of openings (4) serving also as an inlet and an outlet of a material to be crushed, and has a hollow rotary body that takes in the material to be crushed and rotates, similarly to the above-described embodiment. (1) and a required number of loading materials (2) loaded inside the hollow rotary body (1)
And is configured to crush the object to be crushed by the ascending and descending motion of the charge (2) accompanying the rotation of the hollow rotary body (1).

The hollow rotating body (1) is disposed in a container (6) into which the material to be ground is charged. In the illustrated example, the hollow rotator (1) has a cylindrical shape, the container (6) has a cylindrical shape slightly larger than the hollow rotator (1), and has an outer peripheral surface of the hollow rotator (1). There is a gap between them. The container (6) is provided with a supply port (7) for the material to be ground near the one end in the rotation axis direction of the hollow rotary body (1), and a discharge port (5) for the material to be ground near the other end. Have been. The supply port (7) is formed in a cylindrical shape so as to protrude from the upper surface of the container (6), and the discharge port (5) is formed from an opening cut in a rectangular shape from the upper surface to the side surface of the container (6). I have. The discharge port (5) is provided with a slidable lid (51) as shown by an arrow so as to open and close the opening.

In the fine pulverizer of the third embodiment, the material to be pulverized introduced into the container (6) from the supply port (7) is opened from near one end of the hollow rotary body (1) in the direction of the rotation axis. Is introduced into the hollow rotary body through the portion (4), and the powder (2) is pulverized by the ascending and descending motion of the loading material (2) while repeatedly entering and exiting the opening (4) with the rotation of the hollow rotary body (1). Is done. Then, after rotating the hollow rotating body (1) for a predetermined time, the lid (51) is slid downward to open the discharge port (7), whereby the crushed object crushed to a predetermined size. Can be taken out from the discharge port (7). Here, since the material to be crushed must move at least from one end to the other end of the hollow rotator (1) before the crushed object is taken out from the discharge port (7), the inside of the hollow rotator (1) is moved. It is possible to secure a relatively long residence time of the object to be ground in the above, prevent insufficient pulverization, and obtain excellent pulverization processing efficiency.

[0029]

EXAMPLES The effects of the present invention will be clarified by showing the results of experiments using the pulverizer according to the present invention. However, the present invention is not limited to the following examples. (Example) Aggregate having a particle size of 20 to 40 mm obtained by primary crushing of concrete crush by a crusher (Haldpact) is secondarily crushed by a crusher (rod mill), and the crushed material is passed through a vibrating sieve. A 10 mm component was taken out and used as a raw material. The absolute dry gravity of this raw material is 2.25-2.
38, the water absorption was 5.08 to 5.46%.

As the fine pulverizer, a twin-pulverizer shown in FIG. 14 is used, and as the first hollow rotary body (1a), an inner diameter φ
560 mm × inner width 1310 mm cylindrical type, inner diameter φ560 mm × inner width 10 as second hollow rotating body (1 b)
A 10 mm cylindrical one was used. Balls (φ110 mm, weight 5.3 kg × 160 pieces) were used as the loading material of the first hollow rotating body, and balls (φ90 mm, weight 2 pieces) were used as the loading material of the second hollow rotating body. 0.9 kg × 280 pieces). The porosity when the above-mentioned loading material is loaded is 65.5 for the first hollow rotating body.
%, And the second hollow rotating body was 57.0%.

In the experiment, the raw materials were converted to the first hollow rotating body (1).
This was carried out by wet processing by charging the container (6) provided with a) into the supply port (7) and rotating the first and second hollow rotators at 60 rpm respectively. Discharge port (15) of container (16) in which second hollow rotator (1b) is arranged
The valve (14) was closed when the raw material was charged, and opened one hour after the start of the pulverizing process by the rotation of the hollow rotary body.

The absolute specific gravity and the water absorption of the pulverized product taken out from the discharge port (15) were measured. The absolute specific gravity was 2.53 to 2.62, and the water absorption was 2.59 to 2.93%.
It satisfies all the criteria for the quality of the aggregate for concrete, namely, the absolute dry specific gravity of 2.5 or more and the water absorption of 3% or less.

[0033]

As described above, according to the first aspect of the present invention, there is provided a hollow rotator having a plurality of openings serving both as an inlet and an outlet of a crushed object, and rotating by taking the crushed object therein.
A pulverizer comprising a required number of loading materials loaded inside the hollow rotator, and crushing the object to be crushed by the ascending and descending movement of the loading material accompanying rotation of the hollow rotator, Are provided in a container into which the material to be ground is charged, and a supply port of the material to be ground is provided at an upper portion of the container, and a discharge port of the material to be ground is provided at a lower portion thereof. The discharge port of the provided container is connected to a supply port of a container provided with another hollow rotating body, and the connection portion is provided with a valve for adjusting the flow rate of the material to be crushed. Since it is a crusher, the following effects can be obtained. That is, the material to be crushed, which has been put into the container from the supply port, descends in the container by its own weight, is introduced into the inside of the hollow rotating body, is crushed, and is discharged from the discharge port. Excessive crushing by staying inside the hollow rotating body for a long time is prevented, and high-quality recycled aggregate with a high recovery rate while reliably removing impurities such as soft stones contained in mountain sand and mortar adhering to concrete waste. Can be obtained. Also,
An excellent pulverizer with a small installation area and high crushing capacity can be obtained. According to a second aspect of the present invention, there is provided a hollow rotating body having a plurality of openings serving also as an inlet and an outlet of a material to be crushed and rotating by taking in the material to be crushed therein, and a hollow rotating body loaded inside the hollow rotating body. A number of loading materials, and a fine crusher that crushes the material to be crushed by the rising and falling motion of the loading material with the rotation of the hollow rotating body, wherein the hollow rotating body is placed in a container into which the material to be crushed is charged. The container is provided with a supply port for the material to be ground near the one end in the rotation axis direction of the hollow rotary body and a discharge port for the material to be ground near the other end, and the discharge port is provided on the upper surface of the container. Is formed from an opening that is cut out from the side to the side, and the opening is provided with a slidable lid. Can be maintained for a relatively long time, resulting in insufficient pulverization. Can be obtained preventing by excellent pulverizing efficiency, it is possible to adjust the residence time in the container of material to be ground by opening and closing the outlet.

[Brief description of the drawings]

FIG. 1 is a schematic sectional front view showing a first embodiment of a pulverizer according to the present invention.

FIG. 2 is a schematic plan view showing a first embodiment of a pulverizer according to the present invention.

FIG. 3 is a schematic sectional side view showing a first embodiment of the fine pulverizer according to the present invention.

FIG. 4 is a front view of a hollow rotating body.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a sectional view taken along line BB of FIG. 4;

FIG. 7 is an external view showing a first modification of the loading material.

FIG. 8 is a sectional view taken along line AA of FIG. 7;

FIG. 9 is a sectional view taken along line BB of FIG. 7;

FIG. 10 is an external view showing a second modification of the charging material.

FIG. 11 is a cross-sectional view showing a second modification of the charging material.

FIG. 12 is an external view showing a third modification of the loading material.

FIG. 13 is a sectional view showing a third modification of the charge material.

FIG. 14 is a schematic sectional view showing a second embodiment of the pulverizer according to the present invention.

FIG. 15 is a schematic sectional view showing a third embodiment of the pulverizer according to the present invention.

FIG. 16 is an external view showing a third embodiment of the pulverizer according to the present invention.

17 is an axial sectional view of FIG. 16;

FIG. 18 is a sectional view taken along a direction perpendicular to the axis of FIG. 16;

DESCRIPTION OF SYMBOLS 1 Hollow rotating body 1a First hollow rotating body 1b Second hollow rotating body 2 Charge 4 Opening 6 Container 7 Supply port 5 Discharge port 12 Connection passage 13 Valve 14 Valve 15 Discharge port 16 Container 17 Supply port

Claims (8)

[Claims] 1. A hollow rotating body having a plurality of openings serving both as an inlet and an outlet of a material to be crushed and rotating by taking in the material to be crushed, and a required number of loaded inside the hollow rotating body And a pulverizer for pulverizing the object to be crushed by the ascending and descending motion of the charge material accompanying the rotation of the hollow rotator, wherein the hollow rotator is disposed in a container into which the crushed object is charged. ,
A fine pulverizer characterized in that a supply port for a material to be crushed is provided at an upper portion of the container and a discharge port for a material to be crushed is provided at a lower portion. 2. The fine pulverizer according to claim 1, wherein a plurality of hollow rotating bodies are arranged in the container along the flow direction of the material to be pulverized. 3. A supply port of a container provided with another hollow rotary member is connected to a discharge port of the container provided with the hollow rotary member, and a valve for adjusting a flow rate of the material to be ground at the connection portion. The pulverizer according to claim 1, further comprising: 4. The pulverizer according to claim 1, further comprising a detection unit for detecting an amount of the object to be ground in the container. 5. The fine pulverization according to claim 1, wherein a valve for opening the discharge port after a lapse of a predetermined time from the introduction of the material to be pulverized is attached to the discharge port. Machine. 6. A hollow rotator having a plurality of openings serving as an inlet and an outlet of a material to be crushed and rotating by taking in the material to be crushed therein, and a required number of charges loaded inside the hollow rotator And a pulverizer for pulverizing the object to be crushed by the ascending and descending motion of the charge material accompanying the rotation of the hollow rotator, wherein the hollow rotator is disposed in a container into which the crushed object is charged. ,
A fine pulverizer characterized in that the container is provided with a supply port for the material to be crushed near one end in the direction of the rotation axis of the hollow rotary body and a discharge port for the material to be crushed near the other end. 7. The pulverizer according to claim 6, wherein a discharge port of the object to be pulverized is formed to be openable and closable. 8. The pulverizer according to claim 1, wherein a rotation direction of the hollow rotary body is reversed at predetermined time intervals.