JP2021087954A - Grinding method using grinding mill - Google Patents

Abstract

To provide a grinding method using a grinding mill which unnecessitates a grinding medium without reducing grinding efficiency thereby materializing reduction in noise and allowing for contribution to improvement of processing capacity thereof.SOLUTION: A grinding method using a grinding mill is provided, the grinding mill includes: a drum body 1 which is in cylindrical shape and is fixed in non-rotatable manner and comprises a charging hopper 71 for taking-in a grinding object to inside of the grinding mill and a discharging hopper 21 for discharging the grinding object ground by the grinding mill from the grinding mill; a center shaft which is a center shaft 2 penetrating the drum body 1 in a cylinder length direction and is rotationally driven by a motor M; a plurality of partition plates 4 which are arranged at predetermined intervals in a longitudinal direction of the center shaft 2 and attached to the center shaft 2, partition an inner space of the drum body 1 into the plurality of grinding chambers 6 and are arranged in a plurality of grinding chambers 6, respectively; and a plurality of friction plates 5 which are attached to the drum body 1 and are opposed to the plurality of partition plates 4, respectively.SELECTED DRAWING: Figure 1

Description

The present invention relates to a grinding method using a grinder for grinding aggregates and the like, and particularly relates to noise reduction measures and the like.

Conventionally, various ball mill type grinders have existed as devices for obtaining recycled aggregate from waste materials of concrete and asphalt.
Of these, many have a structure in which the inside of the drum is partitioned by a plurality of partition plates in order to increase the residence time of the pyroclastic material. In a grinder having such a structure, the pyroclastic material is partitioned. While moving from one end side to the other end side of the drum body through the gap between the peripheral edge of the plate and the inner wall of the drum, the drum body is ground by a ball (pry medium) in each section.

By the way, in such a conventional grinder, since the partition plate is attached so as to be orthogonal to the central axis, the ball can be positively moved in the front-rear direction (the axial length direction of the drum body). However, most of the movement of the ball was in the radial direction and the circumferential direction.
Therefore, a so-called co-rotation phenomenon in which the ball and the pyroclastic material rotate at a constant speed occurs, which causes a great decrease in the pyroclastic efficiency.

In order to solve this problem, the applicant has already proposed a grinder capable of preventing the occurrence of the above-mentioned co-rotation phenomenon and dramatically improving the grinding efficiency (Patent Documents below). See 1 and 2).
The inventions described in Patent Documents 1 and 2 make it possible to positively give a back-and-forth motion to a grinding medium (ball, etc.) by attaching the partition plate at an angle to a plane orthogonal to the central axis. It is a thing, so to speak, a partition plate having a function as a stirring blade.

However, the conventional ball mill type grinders including the grinders described in Patent Documents 1 and 2 have a problem of generating a large noise.
As a result of investigation by the applicant, it was found that the main cause of the noise is the collision between the ball or pyroclastic material and the drum body, and in particular, the volume of the noise due to the collision between the ball and the drum body is large.
Therefore, in order to effectively reduce the collision noise with the partition plate, for example, it is conceivable to reduce the number of grinding media, but if the number of grinding media is reduced, the contact between the pyroclastic material and the grinding medium is considered. Since the number of times is reduced, there arises a problem that the grinding efficiency is lowered.

Japanese Unexamined Patent Publication No. 2008-104910 JP-A-2010-125446

The present invention has been made to solve the above-mentioned problems of the prior art, and eliminates the grinding medium to reduce noise without lowering the grinding efficiency, and thus miniaturizes the apparatus. It is an object of the present invention to provide a grinding method using a grinding machine that can contribute to the improvement of processing capacity.

The grinding method using a grinding machine according to one aspect of the present invention is
A cylindrical non-rotatable object equipped with a charging hopper for taking the pyroclastic material into the grinder and a discharge hopper for discharging the pyroclastic material ground by the pyroclastic material from the grinder. With the drum body fixed to
A central shaft that penetrates the drum body in the cylinder length direction and is rotationally driven by a motor.
A plurality of partition plates attached at predetermined intervals in the length direction of the central axis to partition the internal space of the drum body into a plurality of grinding chambers, each of which is arranged in each of the plurality of grinding chambers. , Partition plate,
A grinder including a plurality of friction plates attached to the drum body and friction plates facing each of the plurality of partition plates.
A sieving member having a mesh is provided at the end of the grinding chamber on the downstream side of the grinding machine.
At least one of the partition plate and the friction plate is rotatable and
The plurality of friction plates are orthogonal to the central axis, respectively.
Each of the plurality of partition plates has a substantially circular structure, and has a substantially circular structure.
The central shaft is inserted into the central hole of the partition plate, and the central shaft is inserted.
The plurality of partition plates are attached at an angle from a plane orthogonal to the central axis.
A first through hole is provided in each of the plurality of partition plates.
The plurality of friction plates are a grinding method using a grinder, in which a second through hole is provided.
The grinding method is
(A) A step of supplying the pyroclastic material together with water from the charging hopper to the grinder after starting the motor.
(B) A grinding step in which the pyroclastic material supplied from the charging hopper to the grinding machine is sequentially passed through each of the plurality of grinding chambers.
(C) A discharge step of discharging the pyroclastic material ground in the grinding step from the discharge hopper, and a discharge step.
(D) A sorting step of feeding the pyroclastic material discharged by the discharging step to the sieving member and separating the ground pyroclastic material into a size according to the application.
The present invention relates to a grinding method using a grinding machine, which comprises.
..

In the grinding method using a grinder using a grinder according to one aspect of the present invention, a charging hopper for taking the ground material into the inside of the grinder and a ground material ground by the grinder are used. A cylindrical non-rotatably fixed drum body provided with a discharge hopper for discharging the friction body from the grinder, and a central shaft penetrating the drum body in the cylinder length direction, which is rotationally driven by a motor. A plurality of partition plates attached to the central axis and the internal space of the drum body at predetermined intervals in the length direction of the central axis to divide the internal space of the drum body into a plurality of friction chambers, each of which is provided in each of the plurality of friction chambers. A grinder including an arranged partition plate and a plurality of friction plates attached to the drum body, and friction plates facing each of the plurality of partition plates, on the downstream side of the grinder. A sieving member having a mesh is provided at the end of the grinding chamber, and at least one of the partition plate and the friction plate is rotatable, and the plurality of friction plates are orthogonal to the central axis. Each of the plurality of partition plates has a substantially circular structure, the central axis is inserted into the central hole of the partition plate, and the plurality of partition plates are attached at an angle from a plane orthogonal to the central axis. It is premised that a grinder is used, wherein each of the plurality of partition plates is provided with a first through hole, and the plurality of friction plates are provided with a second through hole.
The grinding method is
(A) A step of supplying the pyroclastic material together with water from the charging hopper to the grinder after starting the motor.
(B) A grinding step in which the pyroclastic material supplied from the charging hopper to the grinding machine is sequentially passed through each of the plurality of grinding chambers.
(C) A discharge step of discharging the pyroclastic material ground in the grinding step from the discharge hopper, and a discharge step.
(D) The structure includes a sorting step of feeding the pyroclastic material discharged by the discharging step to the sieving member and separating the ground pyroclastic material into a size according to the application. Since it is a feature of the above, the grinding efficiency can be improved.

It is a partial cross-sectional front view of the grinder which concerns on embodiment of this invention. It is a figure which shows the friction plate which concerns on embodiment, (a) is a plan view, (b) is a sectional view in line IIb-IIb. It is a figure which shows the partition plate which concerns on embodiment, (a) is a plan view, (b) is a side view, (c) is a sectional view in line IIIc-IIIc. It is a partial cross-sectional front surface of a sieve member and a conveyor device which concerns on embodiment. It is sectional drawing which shows the 1st modification of a friction plate. It is sectional drawing for demonstrating the grinding action by a friction plate and a partition plate. It is a figure which shows the 2nd modification of a friction plate, (a) is the perspective view of one piece, (b) is the perspective view of the state which put together two pieces. It is a figure which shows the 3rd modification of the friction plate, (a) is the perspective view of one piece, (b) is the perspective view of the state which put together two pieces. It is a figure which shows the 4th modification of the friction plate, (a) is the perspective view of one piece, (b) is the perspective view of the state which put together two pieces. It is a partial cross-sectional front view of the grinder which concerns on the modification of the whole structure.

Hereinafter, embodiments of the grinder according to the embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a partial cross-sectional front view of a grinder applied to the grind method according to an embodiment of the present invention.
The grinder is a cylindrical drum body configured so that a part of the material to be abraded (raw material) can be taken in from a part (hopper (71)) and discharged from another part (discharge hopper (21)). (1), a central axis (2) penetrating the inside of the drum body (1) in the cylinder length direction, and a central axis (2) are attached at predetermined intervals in the length direction of the central axis (2) to form an internal space of the drum body (1). It is provided with a plurality of partition plates (4) divided into a plurality of grinding chambers (6), and a friction plate (5) attached to a drum body (1) and facing the partition plates (4).
Further, a sieve member (22) that rotates together with the central shaft (2) is attached to the downstream side of the discharge hopper (21).
Both ends of the central shaft (2) are supported by a pair of bearing members (16) and (17).
A motor (M), which is a drive source for rotating the central shaft (2), is connected to one end (upstream side) of the central shaft (2), and a sieve member (22) is connected to the other end (downstream side). ) Is attached. The sieving member (22) has a cylindrical shape having a taper that gradually increases in diameter as the distance from the drum body (1) increases.

The drum body (1) has a substantially cylindrical shape by combining two upper and lower semi-cylindrical members.
The plurality of partition plates (4) are provided at regular intervals in the axial direction of the central axis, and the inside of the drum body (1) is divided into a plurality of grinding chambers (6) in the axial length direction. Each partition plate (4) is inclined with respect to a plane orthogonal to the central axis (2) and is substantially parallel to each other. There is no grinding medium (balls, etc.) in each grinding chamber (6).
The plurality of friction plates (5) are arranged in each grinding chamber (6) and are orthogonal to the central axis (2).
In the grinder, the pyroclastic material (a) is supplied from the hopper (71) together with the water (b), passes through each of the grinding chambers (6) in sequence, and then moves to the most downstream side of the drum body (1). It is discharged from a certain discharge hopper (21) and sent to a sieving member (22).
However, instead of such a wet structure, a dry structure in which the pyroclastic material (a) is sent by a blower may be adopted.

3A and 3B are views showing a partition plate applied to the grinder, where FIG. 3A is a plan view, FIG. 3B is a side view, and FIG. 3C is a sectional view taken along line IIIc-IIIc.
The partition plate (4) has a substantially circular structure in which two semicircular curved plates are combined, and the central axis (2) is inserted through the central hole (41) thereof. The partition plate (4) is attached so as to be inclined clockwise from the plane orthogonal to the central axis (2).
Even when the inclination direction of the partition plate (4) is opposite to that of the present embodiment, the pyroclastic material (a) is moved by a water flow (wet type) or an air flow (dry type). There is no problem in the grinding process.
The partition plate (4) is provided with a plurality of partially arcuate through holes (42) arranged concentrically. The arc width of the through hole (42) is set to a size that allows only the pyroclastic material (a) ground to be smaller than a predetermined particle size to pass through. The arc width of the through hole (42) may gradually decrease from the partition plate (4) on the upstream side of the drum body (1) toward the partition plate (4) on the downstream side.

Further, as shown in FIGS. 3 (b) and 3 (c), a hemispherical convex portion (43) is provided on the surface of the partition plate (4) to form a large uneven pattern. Due to the presence of such a large uneven pattern, when the pyroclastic material (a) collides with the partition plate (4) from an oblique direction, the surface of the partition plate (4) is slightly slid and then the convex portion (43) is formed. An action such as being rubbed with is obtained, and the grinding efficiency of the pyroclastic material (a) is increased.
Further, only the convex portion (43) of the partition plate (4) may be made of a particularly hard material (for example, cemented carbide) to reduce the wear of the partition plate (4) and extend the service life.
In addition, instead of the convex portion (43), an uneven pattern having a relatively large concave portion may be formed. Even in that case, the same effect as that of the uneven pattern provided with the convex portion (43) can be obtained.

In FIG. 1, the partition plates (4) are displayed in a flat plate shape for easy viewing, but as shown in FIG. 3, the partition plates (4) in the present embodiment are arranged at regular intervals in the circumferential direction. It has a wavy curved structure with repeated peaks and valleys. However, the partition plate (4) may have a planar structure. Further, the partition plate (4) may be an elliptical plate as a whole instead of a disk. Further, the same curved surface structure may be adopted for the friction plate (5) described later.

2A and 2B are views showing a friction plate applied to the grinder, where FIG. 2A is a plan view and FIG. 2B is a cross-sectional view taken along the line IIb-IIb.
The friction plate (5) is divided into two parts corresponding to the semi-cylindrical drum body (1). It has a flange portion (54) that surrounds the outer peripheral side of 50).
In the semicircular plate portion (50), a semicircular inner peripheral peripheral portion (51) is formed at a position corresponding to the central portion of the combination of the two friction plates (5), and the inner peripheral peripheral portion (51) is formed. Facing the central axis (2) with a predetermined gap.
The friction plate (5) is attached to the drum body (1) by a screw (not shown) in a state where the outer peripheral portion (53) of the semi-cylindrical flange portion (54) is in contact with the inner wall of the drum body (1). It is attached. The flange portion (54) is provided with an insertion hole (55) for a screw.

For the sake of clarity, the display in the cross section of the friction plate (5) in FIG. 1 is omitted, but the semicircle portion (50) of the friction plate (5) has a large number of concentric partial circles. An arc-shaped through hole (52) is formed. The arc width of the through hole (52) is set to a size that allows only the pyroclastic material (a) ground to be smaller than a predetermined particle size to pass through in the grinding chamber (6). The arc width of the through hole (52) may gradually decrease from the friction plate (5) on the upstream side of the drum body (1) toward the friction plate (5) on the downstream side.
In addition, as shown in the partially enlarged view of FIG. 2B, the semicircular plate portion (50) and the flange portion (54) of the friction plate (5) are formed by casting, press molding, or the like. An uneven pattern (57) is provided.
The friction plate (5) applied to the grinder has a flat plate structure, but the friction plate (5) may have a curved plate structure as in the modified example described later. Further, the friction plate (5) may be an elliptical plate as a whole instead of a disk.

At least one of the partition plate (4) and the friction plate (5) may rotate, but in the present embodiment, the drum body (1) is fixed and the central axis (2) rotates. ing.
Therefore, in the present embodiment, the central shaft (2) rotates, the partition plate (4) attached to the central shaft (2) rotates, while the friction plate (5) attached to the drum body (1) rotates. It is stationary.

FIG. 6 is a cross-sectional view for explaining the grinding action of the friction plate and the partition plate.
As shown in the figure, when the partition plate (4) is rotated 180 ° from the solid line position shown in FIG. 6, it is in the position shown by the broken line in FIG. 6, and then the rotation is repeated so as to return to the solid line position again. .. Meanwhile, in a narrow region (Rm) where the partition plate (4) and the friction plate (5) are close to each other, the pyroclastic material (a) is strongly pressed between the partition plate (4) and the friction plate (5). At the same time, it receives a frictional force due to the rotational force of the partition plate (4). As a result, the pyroclastic material (a) is rubbed against the friction plate (5) or the partition plate (4), or the pyroclastic materials (a) are rubbed against each other and adhere to the surface of the pyroclastic material (a). Foreign matter such as cement is efficiently removed.
The pyroclastic material (a) includes through holes (42) and (52) of the partition plate (4) and the friction plate (5), and a gap (Sp1) between the friction plate (5) and the central shaft (2). , Passes through the gap (Sp2) between the partition plate (4) and the drum body (1), and is sent to the downstream side together with the water (b).
At this time, the edges of the large number of through holes (42) and (52) provided in the partition plate (4) and the friction plate (5) also have the effect of scraping off the foreign matter, so that the foreign matter can be removed more effectively. Can be removed.

The structure of the grinder applied to the grinding method of the present invention is not limited to the structure shown in FIG.
For example, only the friction plate (5) may be rotated to fix the partition plate (4).
In that case, only the drum body (1) is rotated, but the drum body (1), the partition plate (4), and the friction are caused by the centrifugal force received by the abrasion medium (a) from the rotation of the drum body (1). Even if it collides strongly with the plate (5), a loud noise such as a collision between the drum body (1) and the grinding medium does not occur. Further, since a large centrifugal force can be applied to the pyroclastic material (a) by the rotation of the drum body (1), the collision between the pyroclastic material (a) and the flange portion (54) of the friction plate (5) causes the crushed material (a) to collide with each other. Grinding efficiency is improved.
Further, both the partition plate (4) and the friction plate (5) may be rotated in relatively opposite directions.
In that case, the frictional force acting on the pyroclastic material (a) sandwiched between the partition plate (4) and the friction plate (5) is further enhanced, so that the grinding efficiency can be improved.

FIG. 5 is a cross-sectional view showing a first modification of the friction plate (5).
In the friction plate (5) according to the first modification, the flange portion (54) is provided wider than that shown in FIG. 2 (b), and extends to, for example, the midpoint of each grinding chamber (6). ing. By making the flange portion (54) wider in this way, the area of the inner side surface of the flange portion (54) with which the pyroclastic material (a) collides becomes wider, so that the grinding efficiency can be improved. ..

Further, as shown in the partially enlarged view of FIG. 5, a fine uneven pattern (57) formed by sandblasting or the like is formed on the surfaces of the semicircular plate portion (50) and the flange portion (54) of the friction plate (5). Is formed.
When the pyroclastic material (a) collides with the surface of the friction plate (5) from an oblique direction due to the fine uneven pattern (57) shown in FIGS. 2 (b) and 5, the surface of the friction plate (5) is affected. The probability of being rubbed strongly without slipping increases. Therefore, by providing the friction plate (59) with a fine uneven pattern (57), the grinding efficiency of the pyroclastic material (a) can be further improved.
Although not shown in FIG. 3, the partition plate (4) may also be provided with a fine uneven pattern to further improve the grinding efficiency of the pyroclastic material (a).
However, it is not always necessary to provide a fine uneven pattern on either the partition plate (4) or the friction plate (5).
Further, although not shown in FIGS. 2B and 5, the friction plate (5) may also have a convex portion such as the partition plate (4) or a large uneven pattern due to the concave portion (there may be formed. See the modified example below).
Even in that case, the above-mentioned effects can be obtained.

The constituent materials of the partition plate (4) and the friction plate (5) are not limited, but are general-purpose steel materials, high-hardness steel materials such as alloy steels, cemented carbides, ceramics, metal-ceramic materials, and the like. and so on. In order to increase the grinding efficiency and extend the service life, a material having a higher hardness is preferable. The surfaces of the partition plate (4) and the friction plate (5) made of a general-purpose steel material may be coated with a high-hardness material, or only a part thereof may be made of a high-hardness material.

FIG. 4 is a partial cross-sectional front view of the sieving member and the conveyor device applied to the grinder.
Below the sieving member (22), a guide member (82) for receiving a relatively small-diameter pyroclastic material (a1) that has passed through the mesh of the sieving member (22), and a guide member (82) are arranged below the guide member (82). The first feeder (8) is arranged. The first feeding device (9) is attached with a first conveyor member (81) that feeds the pyroclastic material (a1) to the rear of the paper surface of FIG.
Further, on the downstream side of the sieving member (22), a second feeding device (9) for receiving the relatively large-diameter pyroclastic material (a2) sent without passing through the mesh of the sieving member (22) is arranged. Has been done.
The second feeding device (9) is attached with a second conveyor member (91) that feeds the pyroclastic material (a1) to the front of the paper surface of FIG.

As in the present embodiment, a sieving member (22) is provided at the downstream end of the grinder, and the pyroclastic material to be ground is separated into sizes according to the intended use, thereby being continuous with the grinding process. The sorting process can be carried out, and the overall efficiency can be improved.
The mesh size of the sieving member (22) can be arbitrarily selected according to the type of aggregate to be finally obtained. For example, when separating gravel and sand, for example, a mesh having a size of about 5 mm can be adopted.
The material of the sieving member (22) is not particularly limited, but generally, a punching metal (steel plate) is used.

Further, as in the present embodiment, by arranging the conveyor members (81) and (91) that carry the pyroclastic materials (a1) and (a2), respectively, the pyroclastic materials (a1) and (a2) are separated. ) Can be arranged according to the purpose without interfering with the grinder.
The number of sieving members may be two or more, and three or more conveyor members (feeding devices) may be arranged accordingly.

Next, a further modification of the friction plate (5) will be described.
7A and 7B are views showing a second modification of the friction plate, where FIG. 7A is a perspective view of one piece, and FIG. 7B is a perspective view of the two pieces combined.
The friction plate (5) according to the second modification has a semicircular plate portion (50) having a shape similar to that of the partition plate (4) shown in FIG. That is, the semicircular plate portion (50) is composed of a curved surface inclined with respect to the plane orthogonal to the central axis (2), and the semicircular plate portion (50) has a large number of convex portions (56) arranged concentrically. ) (Concave and convex pattern) and a large number of partially arcuate through holes (52) arranged concentrically, and the inner peripheral peripheral portion (51) faces the central axis (2) with a predetermined gap. ..
The arc width of the through hole (52) is set to a size that allows only the pyroclastic material (a) ground to be smaller than a predetermined particle size to pass through.
The flange portion (54) is provided in a wide width as in the first modification, and the friction plate (5) is in a state where the outer peripheral portion (53) of the flange portion (54) is in contact with the drum body (1). Is attached to the drum body (1).

When the friction plate (5) in which the semicircular plate portion (50) is tilted with respect to the plane orthogonal to the central axis (2) is used in this way, the partition plate (4) is orthogonal to the central axis (2). It is preferable to have. The partition plate (4) may have a planar structure or a curved structure. For example, a partition plate (4) having substantially the same shape as the semicircular plate portion (50) of the friction plate (5) shown in FIG. 2 can be used. ..

8A and 8B are views showing a third modification of the friction plate, where FIG. 8A is a perspective view of one piece and FIG. 8B is a perspective view of two pieces combined.
The friction plate (5) according to the third modification has a semicircular plate portion (50) orthogonal to the central axis (2). The semicircular plate portion (50) is provided with a large number of convex portions (56) (concavo-convex patterns) arranged concentrically and a large number of partially arcuate through holes (52) arranged concentrically. , The inner peripheral peripheral portion (51) faces the central axis (2) with a predetermined gap.
The arc width of the through hole (52) is set to a size that allows only the pyroclastic material (a) ground to be smaller than a predetermined particle size to pass through.
The flange portion (54) is provided in a wide width as in the first modification, and the friction plate (5) is in a state where the outer peripheral portion (53) of the flange portion (54) is in contact with the drum body (1). Is attached to the drum body (1).

When the friction plate (5) in which the semicircular plate portion (50) is inclined from the central axis (2) is used as described above, it is preferable that the partition plate (4) is inclined with respect to the central axis (2). The partition plate (4) may have a planar structure or a curved structure.

9A and 9B are views showing a fourth modification of the friction plate, where FIG. 9A is a perspective view of one piece and FIG. 9B is a perspective view of two pieces combined.
The friction plate (5) according to the fourth modification has a semicircular plate portion (50) and a flange portion (54) having substantially the same shape as the friction plate (5) according to the second modification shown in FIG. There is.
The difference between the friction plate (5) according to the fourth modification and the friction plate (5) according to the second modification is that the semicircular plate portion (50) is tilted with respect to the plane orthogonal to the central axis (2). The direction is opposite.
That is, the friction plate (5) according to the second modification is tilted clockwise from the plane orthogonal to the central axis (2), whereas the friction plate (5) according to the fourth modification is tilted clockwise from the plane orthogonal to the central axis (2). ) Is tilted counterclockwise from the plane orthogonal to).
Regardless of whether the tilt direction of the friction plate (5) is the second modification or the fourth modification, the movement of the pyroclastic material (a) is a water flow (in the case of a wet type) or an air flow (in the case of a dry type). Since it is done by, there is no problem in the grinding process.
Even when the friction plate (5) according to the fourth modification is used, it is preferable that the partition plate (4) is orthogonal to the central axis (2). The partition plate (4) may have a planar structure or a curved structure. For example, a partition plate (4) having substantially the same shape as the semicircular plate portion (50) of the friction plate (5) shown in FIG. 2 can be used. ..

As can be easily understood from each of the above-described modifications, the structure and material of the partition plate (4) and the semicircular plate portion (50) of the friction plate (5) may be the same as each other. Further, whether the partition plate (4) and the semicircular plate portion (50) of the friction plate (5) are orthogonal to the central axis (2) or tilted from the orthogonal plane is alternately adopted. Alternatively, both may be tilted.
Further, both of them do not have to be tilted, but it is preferable that at least a narrow region (Rm) for sandwiching the pyroclastic material (a) exists between the partition plate (4) and the friction plate (5). ..

Next, a modified example of the overall structure of the grinder will be described.
FIG. 10 is a partial cross-sectional front view of the grinder according to a modified example of the overall structure.
As shown in the figure, the grinder according to this modification is provided with a hopper (71) for charging the pyroclastic material (raw material) at the center of the drum body (1), and is provided on the left and right sides of the drum body (1). It includes a discharge hopper (21), a sieving member (22), and a motor (M).
Further, in order to rotate one of the sieve members (22) (on the right side in the drawing), a sieve rotation shaft (2a) separated from the central shaft (2) is provided, and the central shaft (2) and the sieve rotation shaft are provided. (2a) is relatively rotatably supported by the bearing member (18).
The left and right sieve members (22) are rotated together with the central shaft (2) by connecting the motors (M) to both ends of the central shaft (2) and rotating the left and right motors (M) in synchronization with each other. It may be a structure to make it. In this case, the central axis (2) and the sieve rotation axis (2a) are integrated. According to the structure of this modified example, the processing capacity can be significantly (about twice) improved by feeding the raw material from the center of the drum body (1) and discharging it from the left and right sieve members (22). it can.

The grinding method using a grinder according to the present invention is used to obtain recycled aggregate from, for example, concrete waste material or asphalt waste material.

a Grinded object b Water 1 Drum body 2 Central shaft 22 Sieving member 4 Partition plate 41 Center hole 42 Through hole 5 Friction plate 50 Semi-disk part 51 Inner peripheral edge part 52 Through hole 54 Flange part 6 Grinding chamber 8 First feed Device 81 1st conveyor device 9 2nd feed device 91 2nd conveyor device

Claims (1)

A cylindrical non-rotatable object equipped with a charging hopper for taking the pyroclastic material into the grinder and a discharge hopper for discharging the pyroclastic material ground by the pyroclastic material from the grinder. With the drum body fixed to
A central shaft that penetrates the drum body in the cylinder length direction and is rotationally driven by a motor.
A plurality of partition plates attached at predetermined intervals in the length direction of the central axis to partition the internal space of the drum body into a plurality of grinding chambers, each of which is arranged in each of the plurality of grinding chambers. , Partition plate,
A grinder including a plurality of friction plates attached to the drum body and friction plates facing each of the plurality of partition plates.
A sieving member having a mesh is provided at the end of the grinding chamber on the downstream side of the grinding machine.
At least one of the partition plate and the friction plate is rotatable and
The plurality of friction plates are orthogonal to the central axis, respectively.
Each of the plurality of partition plates has a substantially circular structure, and has a substantially circular structure.
The central shaft is inserted into the central hole of the partition plate, and the central shaft is inserted.
The plurality of partition plates are attached at an angle from a plane orthogonal to the central axis.
A first through hole is provided in each of the plurality of partition plates.
The plurality of friction plates are a grinding method using a grinder, in which a second through hole is provided.
The grinding method is
(A) A step of supplying the pyroclastic material together with water from the charging hopper to the grinder after starting the motor.
(B) A grinding step in which the pyroclastic material supplied from the charging hopper to the grinding machine is sequentially passed through each of the plurality of grinding chambers.
(C) A discharge step of discharging the pyroclastic material ground in the grinding step from the discharge hopper, and a discharge step.
(D) A sorting step of feeding the pyroclastic material discharged by the discharging step to the sieving member and separating the ground pyroclastic material into a size according to the application.
A grinding method using a grinding machine, which comprises.

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