JPH10137608A - Masher kneader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a an apparatus which removes components adherent to solids such as concrete waste as fine powder without pulverizing the solids. SOLUTION: Solids such as concrete waste are put into a drum 2. The drum 2 is rotated at a prescribed speed while the inside of the drum 2 being ventilated. By the rotation of the drum 2, the solids are mixed, agitated, and mashed and kneaded with deformed bars 18. Components which are adhered to and mixed into the solids is made fine powder to be discharged outside the drum by an air flow. The solids after being kneaded pass through wire nets 12, 13, and those not exceeding a given size is discharged separately from the fine powder. The deformed bars 18 are prevented from flying out from the drum 2 by the wire nets 12, 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubbing apparatus, for example, a rubbing apparatus capable of rubbing waste concrete and extracting only aggregates therefrom.

[0002]

2. Description of the Related Art Conventionally, as an apparatus for separating and recovering fine aggregate from waste concrete, for example, Japanese Patent Application Laid-Open No.
The one described in Japanese Patent Publication No. 550 is known. This apparatus is provided with a ventilation type rotary drum, a configuration in which coarse aggregate of concrete waste material is separated and put in the rotary drum, and a weir is provided at an end. That is, a supply port for fine aggregate, cement hydrate, and the like, and an air port for supplying air are provided at the tip of the rotary drum. In addition, a plurality of scraping plates are provided on the inner surface of the drum body so as to protrude along the circumferential direction. Further, a donut disk-shaped weir and a great are fixedly provided at the end of the rotary drum.

Therefore, in this apparatus, fine aggregate, cement hydrate, and the like are supplied to a rotating drum, and air is sent into the drum. Fine aggregate, cement hydrate, and the like are lifted up by a scraper in the drum and fall. As a result of the repeated scraping and falling, fine aggregate, cement hydrate, and the like are crushed. Further, the fine powder generated in the drum is sucked, and only the fine aggregate is separated and discharged.

[0004]

However, in such a conventional apparatus, fine aggregates and the like are scraped up by a scraping plate in a drum and dropped, so that the charged raw materials are pulverized. It was difficult to use as fine aggregate.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an apparatus capable of removing components adhering to solids such as waste concrete materials without crushing them as fine powder.

[0006]

According to the present invention, there is provided a rubbing apparatus for rubbing solid matter such as concrete waste material, the rotating shaft of which is located substantially in a horizontal plane and is rotatably provided. A drum into which the solid is supplied, a rubbing medium stored inside the drum and rubbing the solid, a fine powder discharging means for discharging fine powder from inside the drum, Discharging means for discharging the rubbed solid from the inside of the drum.

According to a second aspect of the present invention, there is provided the grinding machine according to the first aspect, wherein the grinding medium includes a bar having a predetermined length.

According to a third aspect of the present invention, there is provided the grinding machine according to the first aspect, wherein the fine powder discharging means ventilates the inside of the drum.

According to a fourth aspect of the present invention, the ventilation is performed using heated air such that the temperature of the solid inside the drum is about 300 ° C. Device.

According to a fifth aspect of the present invention, there is provided the grinding machine according to the first aspect, wherein the discharging means has a wire mesh through which only the solid material having a predetermined particle size or less passes.

According to a sixth aspect of the present invention, the solid is supplied to one end in the length direction of the drum, and the discharge means is provided at the other end. A grinding device according to any one of claims 1 to 4.

According to a seventh aspect of the present invention, there is provided the grinding machine according to any one of the first to sixth aspects, further comprising a surfactant supply means for supplying a surfactant to the inside of the drum. .

[0013]

According to the invention as set forth in claims 1 to 7, when a solid such as concrete waste material is charged and supplied into the inside of the drum and the drum is rotated at a predetermined speed, the solid medium such as a rubbed medium is used. The solids are ground. Specifically, solids are crushed or crushed and rubbed. In this case, the aggregate constituting the solid is not crushed. As a result, the components adhering to and mixing with the solid matter become fine powder and are discharged out of the drum. Further, the solid matter (aggregate) that has been ground is also separated from the fine powder and discharged. Grinding is carried out by stirring the rod-shaped grinding medium and the solid in a mixed state, so that the components adhering to the solid can be separated very easily as fine powder. The fine powder can be easily discharged by ventilating the inside of the drum. Further, by passing hot air at a predetermined temperature and heating the solid to about 300 ° C., the difference in the coefficient of expansion between the solid and the attached component allows the attached component to be easily separated from the solid. Become. In addition, the solid material after abrasion of a certain size can be discharged by the wire mesh. Then, by supplying the surfactant together with the solid, it is possible to prevent the fine powder once separated from re-adhering to the surface of the solid. Surfactants serve as grinding aids.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a grinding machine according to the present invention; FIG. 1 to FIG. 4 are views for explaining a milling device according to a first embodiment of the present invention. In these figures, reference numeral 1 denotes a base (or floor) having a horizontal upper surface, on which a drum 2 is rotatably provided. That is, drum 2
Is installed horizontally so that its rotation axis is included in the horizontal plane. An annular gear 3 is provided on the outer peripheral surface of the drum 2 in the middle part in the longitudinal direction. The base 1 is provided with a driving gear 4 for meshing with the annular gear 3 and driving the drum 2 to rotate. The driving gear 4 is configured to be driven by a driving mechanism (including a motor, a speed reducer, and the like) not shown. The outer peripheral surfaces of both ends in the longitudinal direction of the drum 1 are provided with support rollers (annular rings having a flat surface and a predetermined width) 5,
6 is fixed. These support rollers 5, 6
Are slidably supported by roller guides 7 and 8 which are provided on the base 1 and which are concavely curved upward at a predetermined curvature.

Both ends in the longitudinal direction of the cylindrical drum 2 are open, and a predetermined ventilation (hot air of about 300 to 500 ° C.) is performed through the one end opening to the inside of the drum 2. That is, the outlet of the blower tube 10 is provided in communication with the blower from the blower at the one end opening, and ventilation is performed at a predetermined flow rate and a predetermined flow rate through the blower tube 10. An outlet of a concrete waste material supply pipe 11 is in communication with an opening of one end of the drum 2. The outlet end of the supply pipe 11 is inclined and inserted into one end of the drum 2, and waste concrete is supplied from the supply pipe 11 to the bottom of the drum 2. In addition, 20 is a sealing material between the rotating drum 2 and the blower tube 10.

On the other hand, the opening at the other end in the longitudinal direction of the drum 2 is closed by a wire mesh material 12, 13 in a radially outer portion in the form of a weir, and the center of the opening is opened inside the discharge pipe 14. doing. That is, an annular plate-shaped first wire net 12 is stretched over the opening at the other end in the longitudinal direction of the drum 2 so as to cover the radially outer portion. The first wire mesh 12 is stretched at the inner edge of the opening at the other end so as to be perpendicular to the rotation axis of the drum 2. The first wire mesh 12 has a mesh size of 5 mm, and can pass fine aggregate that is fine grains of 5 mm or less. Further, a second wire mesh 13 is connected to the radial inner end of the first wire mesh 12. The second wire mesh 13 is cylindrical with a predetermined length, and both ends in the longitudinal direction are open. That is, one end of the cylindrical second wire mesh 13 in the longitudinal direction is connected to the radial inner end of the first wire mesh 12, and the other end projects into the discharge pipe 14 and is open. The mesh size of the second wire mesh 13 is 20 mm. The mesh size of these wire meshes 12 and 13 is determined by the maximum and minimum dimensions of the aggregate of the supplied concrete waste material. Further, the second wire mesh 13
A disc 15 is fixed to the other end of the opening. This disk 15 has an opening of a predetermined diameter at the center (it is annular).

A discharge pipe 14 is provided so as to cover the other end of the drum 2 in the longitudinal direction. A discharge port 16 is provided at a lower portion (bottom), and a communication port to a dust collector is provided at an upper portion (top). 17 are established respectively. In addition, 21 is a sealing material between the rotating drum 2 and the blower tube 10.

A plurality of deformed reinforcing bars (deformed steel bars) 18 serving as a milling medium are movably accommodated inside the drum 2. The deformed reinforcing bar 18 is a steel bar having a predetermined length and a predetermined diameter (for example, a diameter of 6 mm) and a circular cross section. As shown in FIGS. 4A, 4B, and 4C, the length of the deformed reinforcing bar 18 is, for example, 80% of the length of the drum.
(A). Alternatively, a large number of deformed reinforcing bars 18 having a length of about 20% of the drum length can be stored in the drum. Furthermore, a structure in which two deformed reinforcing bars 18 are connected by a chain can be used as a grinding medium (B). The deformed reinforcing bar 18 may be a bundle of three small-diameter steel bars (C). The barbed medium is not limited to these deformed rebars, and a square bar or the like can also be used. This can be appropriately selected depending on the type of the ground-in target.

In the milling device according to the above construction, while the drum 2 is rotated around its axis at a predetermined speed by a drive mechanism (not shown), for example, concrete waste material is introduced from the supply port, and from the ventilation port. Ventilation (hot air) with a predetermined air volume is performed. As a result of operation for a predetermined time (for example, 30 minutes to 60 minutes) in this state, the concrete waste material heated to about 300 ° C. in the drum 2 is rubbed by the deformed reinforcing bar 18 and separated into aggregate and fine powder. Will be done.
Adhesive components (such as mortar) are removed from the aggregate surface. The adhered components and the like become fine powder and are discharged to the dust collector through the communication port 17 together with air. Aggregates having a predetermined particle size (less than 5 mm) are discharged to the outlet 16 through the first wire mesh 12. Aggregates larger than this will be discharged through the second wire mesh 13 or will be discharged after they have been worn down to fine aggregates.

In this case, the deformed reinforcing bar 18, which is a grinding medium, moves randomly at the bottom of the drum 2, but is blocked by the first wire mesh 12, the second wire mesh 13, and the like, and is moved to the outside of the drum 2. It does not jump out. This is because the deformed reinforcing bar 18 has a bar diameter larger than 5 mm. In addition, the concrete waste material itself can be heated to, for example, about 300 to 500 ° C. and supplied to the drum 2. In this case, room temperature air can be supplied instead of hot air.

FIG. 5 shows a second example of the milling device according to the present invention.
Is shown. In this embodiment, a cylindrical member 31 is provided inside the other end of the drum 2 and the deformed reinforcing bar 18 is provided.
Of the drum 2 to the outside of the drum 2 (discharge pipe 14). This is because the cylindrical member 31 has a predetermined length and a smaller diameter than the drum 2 and is disposed substantially coaxially with the drum 2. Reference numeral 32 denotes a first wire net having a mesh size of 5 mm. Reference numeral 33 denotes a second wire mesh (circular plate) having a mesh size of 20 mm. Therefore, the aggregate is discharged to the discharge port 16 through the radially inner second wire mesh 33, and the fine powder passing through the radially outer first wire mesh 32 is discharged to the dust collector through the communication port 17. The Rukoto. In addition, other configurations,
The operation is the same as in the above embodiment.

FIG. 6 shows a third example of the milling device according to the present invention.
Is shown. In this embodiment, a cylindrical member 31 is provided inside the other end opening of the drum 2 as in the second embodiment to prevent the deformed reinforcing bar 18 from jumping out of the drum 2 (discharge pipe 14). Furthermore, mesh size is 5mm
Is formed on the other end of the drum 2. Reference numeral 33 denotes a second wire mesh (disk shape) having a mesh size of 20 mm. The second wire mesh 33 is the drum 2
The other end of the cylindrical member 31 is closed and filtered. Therefore, the aggregate is discharged through the second wire mesh 33 and the fine powder passing through the first wire mesh portion 41 is discharged from the discharge pipe 17. Other configurations and operations are the same as those in the above embodiment.

FIG. 7 shows a fourth example of the milling device according to the present invention.
Is shown. In this embodiment, the inside of the drum 2 is divided into two in the axial direction (longitudinal direction), and the deformed reinforcing bar 18 is not inserted into one end portion (chamber), but only at the other end portion (chamber). The deformed reinforcing bar 18 is inserted. That is, the concrete waste material is heated to about 300 ° C. by hot air in the chamber 2A on one end side, and the heated concrete waste material is rubbed by the deformed reinforcing bar 18 in the chamber 2B on the other end side to form aggregate and fine powder. Easily peeled off. 2C is the room 2 of the deformed reinforcing bar 18.
It is an annular weir plate for preventing jumping out to A. The hot air supplied in this embodiment is heated to a predetermined temperature by a burner or the like in advance. Further, in this embodiment, a metering pump (surfactant supply means) 101 for supplying a predetermined amount of surfactant into the concrete waste material supply pipe 11 is provided. The metering pump 101 supplies a predetermined amount (0.1 to 0.5% by weight based on waste material) of a surfactant (for example, diethylene glycol) into the supply pipe 11 via the discharge pipe 102 and further into the drum 2. can do. The supplied surfactant prevents reattachment of the fine powder once separated, and facilitates discharge of the fine powder to the dust collector. Other configurations and operations are the same as those in the above embodiment.

[0024]

According to the grinding device according to the present invention,
Solids such as concrete waste can be rubbed. That is, it is possible to remove components adhering to solid substances such as concrete waste materials as fine powder without grinding them. Further, it is possible to prevent the separated fine powder from re-adhering, and to facilitate the discharge.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a milling device according to a first embodiment of the present invention.

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

FIG. 3 is a cross-sectional view showing a wire mesh portion of the milling device according to the first embodiment of the present invention.

FIG. 4 is a perspective view showing a ground medium according to the first embodiment of the present invention.

FIG. 5 is a sectional view showing a part of a milling device according to a second embodiment of the present invention.

FIG. 6 is a sectional view showing a part of a milling device according to a third embodiment of the present invention.

FIG. 7 is a sectional view showing a milling device according to a fourth embodiment of the present invention.

[Explanation of symbols]

 2 drum, 12 first wire mesh (discharge means), 14 discharge pipe, 16 discharge port (discharge means), 17 communication port (fine powder discharge means), 18 deformed reinforcing bar (grinding medium), 101 metering pump (surfactant) Agent supply means).

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI C04B 18/16 ZAB C04B 18/16 ZAB (72) Inventor Hiroshi Yoshida 8354 Yokoze Yokoze-cho, Yokoze-cho, Chichibu-gun, Saitama Prefecture (72) Inventor Yusuke Nishimura 1-1, Donan-cho, Yawatanishi-ku, Kitakyushu-shi, Fukuoka Prefecture Cement Development Center, Mitsubishi Materials Corporation

Claims (7)

[Claims] A rubbing apparatus for rubbing solid matter such as concrete waste material, wherein a rotating shaft is rotatably provided in a substantially horizontal plane, and a drum to which the solid matter is supplied inside is provided. A rubbing medium stored inside the drum for rubbing the solid; a fine powder discharging means for discharging fine powder from the inside of the drum; and a rubbed solid discharged from the drum. A milling device provided with a discharging means. 2. The grinding machine according to claim 1, wherein the grinding medium includes a bar having a predetermined length. 3. The milling device according to claim 1, wherein the fine powder discharging means ventilates the inside of the drum. 4. The milling device according to claim 3, wherein the ventilation is performed using air heated so that the temperature of the solid inside the drum is about 300 ° C. 5. The discharge means has a wire mesh through which only solid substances having a particle size equal to or less than a predetermined particle diameter are passed.
A grinding machine according to claim 1. 6. The apparatus according to claim 1, wherein the solid material is supplied to one end of the drum in the length direction, and the discharge means is provided at the other end. Nori fir device. 7. The milling device according to claim 1, further comprising a surfactant supply means for supplying a surfactant to the inside of the drum.