WO2011064930A1 - Ore grinding device and method for producing recycled aggregate - Google Patents

Ore grinding device and method for producing recycled aggregate Download PDF

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Publication number
WO2011064930A1
WO2011064930A1 PCT/JP2010/005649 JP2010005649W WO2011064930A1 WO 2011064930 A1 WO2011064930 A1 WO 2011064930A1 JP 2010005649 W JP2010005649 W JP 2010005649W WO 2011064930 A1 WO2011064930 A1 WO 2011064930A1
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WO
WIPO (PCT)
Prior art keywords
aggregate
recycled aggregate
abrasive grains
grinding
recycled
Prior art date
Application number
PCT/JP2010/005649
Other languages
French (fr)
Japanese (ja)
Inventor
隆人 賀谷
雄一 長原
勝由 橋本
Original Assignee
コトブキ技研工業株式会社
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Application filed by コトブキ技研工業株式会社 filed Critical コトブキ技研工業株式会社
Publication of WO2011064930A1 publication Critical patent/WO2011064930A1/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24CABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00Abrasive blasting machines or devices; Plants
    • B24C3/32Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26Details
    • B02C13/286Feeding or discharge
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C19/00Other disintegrating devices or methods
    • B02C19/0012Devices for disintegrating materials by collision of these materials against a breaking surface or breaking body and/or by friction between the material particles (also for grain)
    • B02C19/0018Devices for disintegrating materials by collision of these materials against a breaking surface or breaking body and/or by friction between the material particles (also for grain) using a rotor accelerating the materials centrifugally against a circumferential breaking surface
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/10Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
    • B02C23/12Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03BSEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B9/00General arrangement of separating plant, e.g. flow sheets
    • B03B9/06General arrangement of separating plant, e.g. flow sheets specially adapted for refuse
    • B03B9/061General arrangement of separating plant, e.g. flow sheets specially adapted for refuse the refuse being industrial
    • B03B9/065General arrangement of separating plant, e.g. flow sheets specially adapted for refuse the refuse being industrial the refuse being building rubble
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B9/00Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02Treatment
    • C04B20/026Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26Details
    • B02C13/286Feeding or discharge
    • B02C2013/28618Feeding means
    • B02C2013/28681Feed distributor plate for vertical mill
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/52Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/58Construction or demolition [C&D] waste
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Definitions

  • the present invention relates to a polishing apparatus and a method for producing recycled aggregate that efficiently removes adhered mortar while preventing excessive fracture of the recycled aggregate.
  • Patent Document 3 Various proposed methods for removing adhering mortar include a “rubbing method” in which concrete gravel supplied between the peripheral surfaces of a vertical or horizontal double-rotating drum is mechanically scrubbed under strong pressure (Patent Document). 1, 2) and “re-crushing method” (Patent Document 3) which repeats crushing several times using a centrifugal crusher.
  • the conventional adhesion mortar removal technique has the following problems. (1) Since the grinding method disclosed in Patent Documents 1 and 2 has a small grinding effect, it takes a long processing time. In particular, since a large amount of mortar powder or aggregated crushed powder generated during scuffing enters the gap between the glass and the glass to inhibit the scuffing action, the removal efficiency of the attached mortar decreases with time. (2) In the methods disclosed in Patent Documents 1 and 2, it has been proposed to suck and collect fine powder generated in the scuffing space, but it is technically difficult to remove the fine powder. (3) In the re-crushing method disclosed in Patent Document 3, it is necessary to increase the number of crushing times in order to increase the mortar removal rate.
  • the present invention has been made in view of the above points, and an object thereof is to provide at least the following recycled aggregate production technology.
  • the present invention is a reclaimed aggregate grinding device that grinds and recycles the recycled aggregate taken out of the concrete waste and removes the attached mortar, the grinding device being rotatable about a vertical axis, A blast rotor that radiates abrasive grains by centrifugal force, a main body that houses the blast rotor and forms a deposition layer around the blast rotor, and is placed directly above the blast rotor in the main body to deposit recycled aggregate A distribution body that diffuses toward the layer, a system that supplies abrasive grains to the blast rotor, and a system that supplies reclaimed aggregate to the main body, continuously from the rotating blast rotor toward the deposition layer
  • a grinding apparatus characterized in that a regenerated aggregate is dropped into a radiation area of radiated abrasive grains to remove adhering mortar.
  • the present invention provides a polishing apparatus according to the above-described polishing apparatus, wherein an opening for discharging abrasive grains deposited in a deposition layer into the main body is provided in a part of the main body.
  • the present invention provides a grinding apparatus characterized in that in any of the above-described grinding apparatuses, means for applying vibration to the main body is added.
  • the present invention includes a step of crushing concrete waste containing recycled aggregate with a crusher, a classifying step of classifying the crushed material with a screen device and taking out the regenerated aggregate, and grinding the extracted crushed aggregate with a grinding device.
  • a reclaimed aggregate production method including a grinding step for removing adhering mortar, wherein the grinding device is the grinding device according to any one of claims 1 to 3 and rotates.
  • the process of continuously radiating abrasive grains from the blast rotor toward the deposited layer and the process of dropping the regenerated aggregate into the radiation area of the abrasive grains are performed in parallel, and the abrasive grains collide with the regenerated aggregate.
  • a method for producing recycled aggregate which is characterized by removing adhered mortar.
  • the present invention provides a recycled aggregate produced by forming a system for supplying abrasive grains to the blast rotor between the discharge side of the screen device and the grinding device in the above-described method for producing recycled aggregate,
  • a method for producing recycled aggregate characterized in that the part is recirculated as abrasive grains into the main body of the grinding apparatus.
  • the present invention can obtain at least one of the following effects. (1) Only the adhering mortar can be efficiently removed without excessively crushing the reclaimed aggregate itself simply by causing small abrasive grains to collide with the regenerated aggregate being dropped. (2) In the conventional re-crushing method, it was necessary to increase the number of crushing times in order to increase the removal rate of mortar. On the other hand, in the present invention, when the recycled aggregate rolls down along the inclined surface of the deposited layer, it is possible to ensure a long time and distance for the recycled aggregate to pass through the deposited layer. Compared with, the removal efficiency of adhered mortar is significantly improved. Therefore, it is possible to reduce the number of times of grinding the recycled aggregate as compared with the prior art.
  • the regenerated aggregate (for example, 5 mm) having a specific size or more with respect to the total input amount of the crushed material without being affected by the number of times of grinding of the regenerated aggregate.
  • the recovered amount of the above recycled coarse aggregate can be increased, and the yield can be improved.
  • a part of the recycled aggregate is used as abrasive grains, there is no need to prepare a new blasting material such as metal grains, and the abrasive grains are the recycled aggregate itself. Finally, it is economical because it is not necessary to separate and collect only the abrasive grains.
  • Adhering mortar that becomes a cushion material against impact is discharged together with the recycled aggregate to the outside of the grinding apparatus by natural fall and is not easily accumulated in the grinding apparatus. Therefore, it is possible to maintain good removal performance of the attached mortar over a long period of time.
  • (6) By adding a means for applying vibration to the main body of the grinding apparatus, aggregates having a large particle size are exposed on the surface of the inclined surface of the deposited layer, so that the surface layer side of the inclined surface of the deposited layer is covered with abrasive grains. Can be avoided. Therefore, the removal efficiency of adhesion mortar becomes still higher.
  • the deposited layer can be easily composed of an aggregate having a large particle size, and the recycled aggregate is good. Persistence of the action of removing the extraneous matter is further improved.
  • a means for applying vibration is added to the main body of the grinding apparatus, abrasive grains deposited on the deposited layer can be automatically discharged. Therefore, the machine is periodically stopped and the worker deposits on the deposited layer. Maintenance work to remove the grains is not necessary.
  • FIG. 1 Schematic explanatory drawing of the production method of the reproduction aggregate concerning Example 1 of the present invention.
  • Central longitudinal cross-sectional view of the grinding apparatus according to Example 1 Sectional view of III-III in Fig. 2
  • Partial sectional view of the main part of the grinding equipment for explaining the grinding process of recycled aggregate
  • FIG. 1 shows a production flow of a reclaimed aggregate production method comprising a reclaimed aggregate grinding process by the grinding apparatus 10 and a classification screen apparatus 40 classification process.
  • FIGS. 2 to 4 show the grinding apparatus, and FIGS. 5 and 6 are explanatory views of the principle of removing the adhered mortar.
  • the grinding apparatus 10 uses a part of the recycled fine aggregate (regenerated sand) classified by the sorting screen device 40 as abrasive grains, and sprays the abrasive grains on the falling recycled aggregate to adhere.
  • the mortar is removed.
  • Recycled aggregate A includes coarse aggregate and fine aggregate, and after crushing concrete gravel generated at various sites to a size of about 100 mm to 120 mm with a jaw crusher, etc., it can be done with a known crusher. Means a crushed product crushed to a size of 50 mm or less.
  • a jaw crusher etc.
  • the grinding device 10 is a device that removes mortar adhering to the aggregate by shot blasting, and houses a drum-shaped blast rotor 20 that rotates in one direction around a vertical axis, and a blast rotor 20.
  • a main body 30 and a conical distributor 31 disposed in the main body 30 directly above the blast rotor 20 are provided.
  • the grinding apparatus 10 includes a system for supplying recycled aggregate into the main body 30 and a system for supplying hard abrasive grains to the blast rotor 20.
  • the grinding apparatus 10 will be described in detail with reference to FIGS.
  • the blast rotor 20 is a rotating drum that injects hard abrasive grains B by centrifugal force, and is surrounded by a top plate 21 and a bottom plate 22 and a side plate 23 that connects the peripheral portions of the drum. To form.
  • the blast rotor 20 has a supply port 24 formed in the center of the top plate 21 and a radial radiation path 25 partitioned by a vertical plate inside. An end portion of the radiation path 25 exposed to the side plate 23 is formed as an injection port 26.
  • the supply port 24, the radiation path 25, and the injection port 26 communicate with each other so that the abrasive grains B continuously introduced through the supply port 24 can be sprayed from the injection port 26 through the radiation path 25 at high speed horizontally. .
  • a vertical rotation shaft 27 is attached to the lower center of the bottom plate 22, and the blast rotor 20 that receives the rotation of a drive source (such as a motor) (not shown) can rotate in one direction around the rotation shaft 27. .
  • a drive source such as a motor
  • blast rotor 20 for example, a rotor constituting a known centrifugal crusher can be substituted.
  • the rotational centrifugal force of the blast rotor 20 is used as the means for injecting the abrasive grains B, a special injection device for injecting compressed air at a high speed is not required, and a large amount of abrasive grains are directed to a wide range of 360 degrees. Can project at high speed.
  • Main Body 30 accommodates the blast rotor 20 and the distributor 31 therein, and further forms a grinding chamber 32 therein.
  • An annular shelf board 33 is formed around the blast rotor 20 in the grinding chamber 32, and a deposited layer 34 made of recycled aggregate A and abrasive grains B can be formed on the shelf board 33.
  • the deposited layer 34 functions to slow down the fall speed of the regenerated aggregate A to increase the blast time and to protect the main body 30 from the abrasive grains B. Therefore, the blast time of the recycled aggregate A by the projection of the abrasive grains B can be adjusted by selecting the height and gradient of the deposited layer 34.
  • An aggregate input path 35 and an abrasive grain input path 36 are formed at the top of the main body 30.
  • the aggregate input path 35 is formed at a position where the recycled aggregate A can be input toward the distributor 31.
  • the abrasive grain charging path 36 penetrates the distributor 31 and is formed to have a length that allows the lower part of the abrasive grain charging path 36 to reach the supply port 24 of the blast rotor 20.
  • FIG. 3 shows a case where the aggregate input path 35 is formed in a form adjacent to the abrasive grain input path 36, multiple concentric circles are provided so that the annular aggregate input path 35 is positioned around the abrasive grain input path 36. You may form in the form of.
  • the cross-sectional shapes of the aggregate charging path 35 and the abrasive grain charging path 36 are not limited to the illustrated circle, but may be other known shapes such as a rectangle or a polygon.
  • the aggregate input path 35 and the abrasive grain input path 36 are equipped with dampers (not shown) to adjust the supply amount of the recycled aggregate A and abrasive grains B through the supply paths 35 and 36 by the damper, or the recycled aggregate A It is desirable that the supply of abrasive grains B can be switched. If the damper is configured so that the supply of the recycled aggregate A can be switched through the abrasive grain charging path 36, the recycled aggregate A can be input to the blast rotor 20 through the both supply paths 35 and 36 in the initial operation of the grinding apparatus 10. The required amount of abrasive grains B can be produced in advance.
  • the distributor 31 is for reducing the fall speed of the recycled aggregate A put into the grinding chamber 32 and spreading the fall range, and is disposed above the blast rotor 20. ing.
  • the overall shape of the distributor 31 is not limited to a cone, but may be a pyramid. In short, it may be any shape as long as the regenerated aggregate that is dropped can be evenly distributed and guided toward the annular deposition layer 34.
  • the grinding apparatus 10 includes a crushed material supply system L 1 that supplies raw materials into the main body 30, and a recycled aggregate supply that supplies recycled aggregates from the grinding apparatus 10 to the sorting screen device 40. and line L 2, a sorting screen device abrasive supply line L 3 for supplying abrasive particles separated recovered hard at 40 to blast the rotor 20 of Migakuko device 10, it was separated and recovered by the sorting screen device 40 recycled aggregate grinding A recycled aggregate reflux system L 4 to be supplied to the mining apparatus 10 is provided.
  • a crushed material supply system L 1 that supplies raw materials into the main body 30, and a recycled aggregate supply that supplies recycled aggregates from the grinding apparatus 10 to the sorting screen device 40.
  • line L 2 a sorting screen device abrasive supply line L 3 for supplying abrasive particles separated recovered hard at 40 to blast the rotor 20 of Migakuko device 10, it was separated and recovered by the sorting screen device 40 recycled aggregate grinding
  • a recycled aggregate reflux system L 4 to be supplied to the mining apparatus 10 is provided.
  • the crushed material supply system L 1 is a system for supplying the crushed material crushed to a size of 50 mm or less with a known crusher to a grinding chamber 32 of the grinding apparatus 20. It is.
  • the crushed concrete glass contains coarse aggregates and fine aggregates as raw materials for recycled aggregates, and adhering mortar is removed when passing through the grinding apparatus 20.
  • recycled aggregate supply system recycled aggregate supply system L 2 is a system for supplying recycled aggregate finishing the Migakuko toward the Migakuko device 10 to the sorting screen device 40.
  • the crushed material that has been polished by the polishing apparatus 10 is supplied to the sorting screen apparatus 40 and classified into a predetermined size.
  • the abrasive grain supply system L 3 is a system for supplying abrasive grains from the sorting screen device 40 toward the blast rotor 20 of the grinding apparatus 10, and the recycled aggregate classified by the sorting screen device 40. Among them, recycled fine aggregate (recycled sand) suitable for abrasive grains can be taken out and returned to the blast rotor 20 of the grinding apparatus 10.
  • the tip of the abrasive grain supply system L 3 communicates with the abrasive grain introduction path 36.
  • Recycled Aggregate Return System L 4 is a recycled aggregate classified by the sorting screen device 40, and classified coarse aggregate (regenerated aggregate) is the main body 30 of the grinding apparatus 10. It is a system that supplies the inside. The tip of the recycled aggregate reflux system L 4 communicates with the aggregate input path 35 directly or via the crushed material supply system L 1 .
  • reference numeral 51 in FIG. 1 is a storage tank provided in the abrasive supply line L 3 and recycled aggregate reflux line L 4, these storage tanks 51 and 52 is not essential.
  • the sorting screen device 40 is a device that classifies crushed materials into a plurality of sizes, and includes a plurality of sieves 41 and blowers 42 that are arranged hierarchically and have different mesh sizes.
  • a dust collecting device 43 is connected to the sorting screen device 40 via a pipe so that the fine powder floating in the sorting screen device 40 can be sucked and collected.
  • the recycled aggregate A is supplied into the grinding chamber 32 through the aggregate input path 35.
  • the input recycled aggregate A collides with the distributor 31 covering the upper surface of the blast rotor 20, and rolls down toward the deposition layer 34 while being distributed in all directions along the inclined surface of the distributor 31.
  • abrasive grains B having a small mass (diameter) are collided with recycled aggregate A having a large mass (diameter). Accordingly, when the abrasive grains B collide with the aggregate composed mainly of mortar at high speed, the aggregate is crushed, but even if the abrasive grains B collide with the recycled aggregate A at high speed, There is no risk of crushing more than necessary.
  • FIG. 4 shows a model diagram for explaining the grinding process of the recycled aggregate A in detail.
  • the recycled aggregate A is pressed toward the deposition layer 34 under the impact of a large number of abrasive grains B.
  • the lateral pressing force becomes a resistance element of the natural fall of the regenerated aggregate A, and as a result, the time for the reclaimed aggregate A to pass through the deposited layer 34 (the grinding time) becomes longer. If the number (amount) of the abrasive particles B sprayed per unit time is constant, the number of collisions increases in proportion to the collision time with the recycled aggregate A, and the removal efficiency of the adhered mortar C is improved.
  • Another factor is that the abrasive grains B are continuously emitted while the blast rotor 20 rotates, so that the revolving aggregate A acts on the revolving aggregate A in the rotational direction of the rotor. Therefore, the recycled aggregate A rolls down obliquely while turning with respect to the inclined surface of the deposited layer 34. If the regenerated aggregate A moves obliquely on the inclined surface of the deposited layer 34, the passage distance and the passage time of the regenerated aggregate A become longer than when the regenerated aggregate A rolls right below. As the passing distance of the regenerated aggregate A becomes longer, the collision time with the regenerated aggregate A becomes longer, and the removal efficiency of the adhered mortar C is improved.
  • FIG. 5 and 6 show the mechanism by which the adhered mortar C is removed, FIG. 5 shows the recycled aggregate A before the abrasive grains B collide, and FIG. 6 shows the regeneration when the abrasive grains B collide. Aggregate A is shown.
  • ⁇ 3> recirculating a part of the reproduction fine aggregate classification was less than 5mm in abrasive particles of reflux sorting screen device 40 (play sand) as abrasive particles, to blast the rotor 20 of Migakuko device 10 through the abrasive particle supply system L 3 To do. Since the abrasive grains are continuously returned to the grinding apparatus 10 for use, it is not necessary to prepare a new metallic blast material separately, and the abrasive grains are recycled fine aggregate (recycled sand) itself. Finally, it is economical because it is not necessary to separate and collect only the abrasive grains.
  • FIG. 7 shows another grinding apparatus 10. Since the basic configuration and operation of the grinding apparatus 10 in this example are the same as those in the first embodiment described above, detailed description thereof will be omitted.
  • a means for applying vibration to the main body 30 is added so as to vibrate the deposited layer 34, and an opening is provided in a part of the main body 30 so that the abrasive grains B deposited on the deposited layer 34 can be removed. It is a thing.
  • the grinding apparatus 10 includes means for applying vibration to the deposited layer 34.
  • a means for applying vibration to the deposited layer 34 for example, it is possible to vibrate by a vibration motor 37 attached to the main body 30.
  • a vibration motor 37 attached to the main body 30.
  • a known swing mechanism may be applied so that the main body 30 vibrates.
  • the coating of the abrasive grains B serves as a cushion to absorb the impact of the abrasive grains B.
  • the vibration motor 37 or the like As shown in the drawing, the regenerated aggregate A having a large particle size is raised on the surface layer of the inclined surface of the deposited layer 34, and the abrasive particles B having a small particle size are formed into the deposited layer. Infiltrate the depth of 34.
  • the surface of the inclined surface of the deposited layer 34 is always covered with the regenerated aggregate A group having a large particle size, the impact of the abrasive grains B is not easily attenuated by the deposited layer 34, and the regenerated aggregate A by the abrasive grains B group.
  • a good grinding effect can be sustained over a long period of time.
  • an opening 38 is opened in a part of the shelf 33 that forms the deposition layer 34 and the main body 30 located below the shelf 33 is provided.
  • a recovery port 39 is also opened in a part of the side plate 30a.
  • By applying a forced vibration to the deposited layer 34 it is possible to promote the discharge of the recycled aggregate A and the abrasive grains B having a small particle diameter through the openings 38 and 39.
  • the impact of the abrasive grains B may be absorbed by the covering of the reclaimed aggregate A group and the abrasive grain B group having a small particle size as described above as a cushioning material. There is. Therefore, it is necessary to periodically stop the operation of the machine and remove the recycled aggregate A group and the abrasive grain group B having a small particle size accumulated by the worker on the deposition layer 34. As in this example, the above-described periodic maintenance work is not required by configuring the recycled aggregate A group and the abrasive grain group B having a small particle size deposited in the deposited layer so as to be automatically discharged.
  • FIG. 8 shows a production flow of a reclaimed aggregate production method according to another embodiment comprising a reclaimed aggregate grinding process by the grinding apparatus 10 and a classification process by the sorting screen device 40. Since the present embodiment is the same as the structure of the first embodiment described above except for the abrasive grain supply system, the description thereof is omitted.
  • the abrasive grain supply system L 3 between the discharge side of the sorting screen device 40 and the blast rotor 20 of the grinding apparatus 10 is connected by the abrasive grain supply system L 3 , and a part of the recycled aggregate classified by the sorting screen device 40 is polished.
  • an abrasive grain storage hopper 51 is provided outside the grinding apparatus 10 as in this embodiment, and the gap between the abrasive grain storage hopper 51 and the blast rotor 20 is laid. through the abrasive supply system L 3, it may be supplied from the abrasive storage hopper 51 to the blast rotor 20 of the direct Migakuko device 10.
  • Reference numeral 50 is a known centrifugal crusher.
  • Example 4 Although the above has described the case where concrete glass is targeted, it can also be applied to the removal of asphalt components for crushed materials based on asphalt waste.

Abstract

Deposits such as mortar are efficiently removed while preventing over crushing of recycled aggregate. A method for producing recycled aggregate, which includes a step for crushing waste concrete, a sorting step for sorting the crushed materials to extract the recycled aggregate, and an ore-grinding step for ore-grinding the extracted crushed aggregate to remove the deposited mortar, wherein a step for consecutively emitting abrasive particles and a step for inducing the recycled aggregate to fall to the area where the abrasive particle group is emitted are performed in parallel, and wherein the abrasive particles are brought into collision with the recycled aggregate to remove the deposited mortar.

Description

磨鉱装置及び再生骨材の生産方法Grinding equipment and production method of recycled aggregate
 本発明は再生骨材の過破砕を防止つつ、付着モルタルを効率的に除去する磨鉱装置及び再生骨材の生産方法に関する。 [Technical Field] The present invention relates to a polishing apparatus and a method for producing recycled aggregate that efficiently removes adhered mortar while preventing excessive fracture of the recycled aggregate.
 コンクリート廃材に含まれる粗骨材、細骨材等の再生骨材の需要が増加傾向にある。
 コンクリート廃材を細かく破砕することで得られた再生骨材にはモルタル分が付着している。モルタル付着量の多い再生骨材をコンクリート用の骨材に用いると、吸水率、凍結融解特性、又は乾燥収縮特性等に悪影響を及ぼすため、付着モルタルはできるかぎり除去しなければならない。
Demand for recycled aggregates such as coarse aggregates and fine aggregates contained in concrete scraps is increasing.
Mortar content is attached to the recycled aggregate obtained by finely crushing concrete waste. When recycled aggregates with a large amount of mortar are used for aggregates for concrete, water absorption, freeze-thaw characteristics, or drying shrinkage characteristics are adversely affected. Therefore, adhered mortar must be removed as much as possible.
 種々提案されている付着モルタルの除去方法は、縦型又は横型の二重回転ドラムの周面間に供給したコンクリートガラを強圧下で機械的に擦りもみ加工を行なう「擦りもみ方式」(特許文献1,2)と、遠心破砕機を用いて数回に亘り破砕を繰り返す「再破砕方式」(特許文献3)に大別される。 Various proposed methods for removing adhering mortar include a “rubbing method” in which concrete gravel supplied between the peripheral surfaces of a vertical or horizontal double-rotating drum is mechanically scrubbed under strong pressure (Patent Document). 1, 2) and “re-crushing method” (Patent Document 3) which repeats crushing several times using a centrifugal crusher.
特開平8-245248号公報JP-A-8-245248 特開2000-197876号公報JP 2000-197876 A 特開2008-166109号公報JP 2008-166109 A
 従来の付着モルタルの除去技術にはつぎのような問題点があった。
(1)特許文献1,2に開示された摺りもみ方式は磨鉱作用が小さいために処理時間が長くかかる。
 特に擦りもみ中に発生した多量のモルタル粉や骨材の破砕粉がガラとガラの隙間に入り込んで、擦りもみ作用を阻害するため、時間の経過に伴い付着モルタルの除去効率が低くなる。
(2)特許文献1,2に開示された方法にあっては、擦りもみ空間内に発生する微粉を吸引回収することが提案されているものの、微粉を除去することが技術的に難しい。
(3)特許文献3に開示された再破砕方式にあっては、モルタルの除去率を高めるには破砕回数を増す必要がある。
 破砕回数を増すと再生骨材そのものが必要以上に粉砕されてしまい、コンクリートガラの全投入量に対して最終的に5mm以上の再生骨材(粗骨材)の回収量が極めて少なくなる。つまり歩留まりが悪くなる。
 反対に再破砕の回数を減らすと細骨材の過破砕を解消できるものの、付着モルタルの除去量が減少するという問題があった。
The conventional adhesion mortar removal technique has the following problems.
(1) Since the grinding method disclosed in Patent Documents 1 and 2 has a small grinding effect, it takes a long processing time.
In particular, since a large amount of mortar powder or aggregated crushed powder generated during scuffing enters the gap between the glass and the glass to inhibit the scuffing action, the removal efficiency of the attached mortar decreases with time.
(2) In the methods disclosed in Patent Documents 1 and 2, it has been proposed to suck and collect fine powder generated in the scuffing space, but it is technically difficult to remove the fine powder.
(3) In the re-crushing method disclosed in Patent Document 3, it is necessary to increase the number of crushing times in order to increase the mortar removal rate.
If the number of times of crushing is increased, the recycled aggregate itself is pulverized more than necessary, and finally the recovered amount of recycled aggregate (coarse aggregate) of 5 mm or more with respect to the total input amount of concrete glass is extremely reduced. In other words, the yield decreases.
On the contrary, if the number of re-crushing is reduced, over-crushing of fine aggregates can be eliminated, but there is a problem that the amount of adhered mortar removed decreases.
 本発明は以上の点に鑑みて成されたもので、その目的とするところは少なくともつぎの再生骨材の生産技術を提供することにある。
(1)再生骨材の過破砕を回避しつつ付着モルタルを効率よく除去すること。
(2)コンクリートガラの全投入量に対する5mm以上の再生骨材の回収量を増加させること。
(3)付着モルタルの良好な除去性能を維持できること。
The present invention has been made in view of the above points, and an object thereof is to provide at least the following recycled aggregate production technology.
(1) Efficient removal of attached mortar while avoiding excessive crushing of recycled aggregate.
(2) To increase the recovery amount of recycled aggregate of 5 mm or more with respect to the total input amount of concrete glass.
(3) Good removal performance of adhered mortar can be maintained.
 本願発明はコンクリート廃材を破砕して取り出した再生骨材を磨鉱して付着モルタルを除去する再生骨材の磨鉱装置であって、前記磨鉱装置が鉛直軸を中心に回転可能であり、遠心力で研磨粒を放射するブラストロータと、前記ブラストロータを収容し、ブラストロータの周囲に堆積層を形成した本体と、前記本体内でブラストロータの真上に配置し、再生骨材を堆積層へ向けて拡散する分配体と、前記ブラストロータへ研磨粒を供給する系統と、前記本体へ再生骨材を供給する系統とを具備し、回転するブラストロータから堆積層へ向けて連続的に放射した研磨粒群の放射域に再生骨材を落下させて付着モルタルを除去することを特徴とする、磨鉱装置を提供する。
 本願発明は前記した磨鉱装置において、本体の一部に、堆積層に堆積した研磨粒を本体内へ排出する開口を設けたことを特徴とする、磨鉱装置を提供する。
 本願発明は前記した何れかの磨鉱装置において、本体に振動を与える手段を付加したことを特徴とする、磨鉱装置を提供する。
 本願発明は再生骨材を含むコンクリート廃材を破砕機で破砕する工程と、この破砕物をスクリーン装置により分級して再生骨材を取り出す分級工程と、取り出した破砕骨材を磨鉱装置により磨鉱して付着モルタルを除去する磨鉱工程とを含む再生骨材の生産方法であって、前記磨鉱装置が前記請求項1乃至請求項3の何れかに記載した磨鉱装置であり、回転するブラストロータから堆積層へ向けて研磨粒を連続的に放射する工程と、研磨粒群の放射域に再生骨材を落下させる工程とを並行して行い、再生骨材に研磨粒を衝突させて付着モルタルを除去することを特徴とする、再生骨材の生産方法を提供する。
 本願発明は前記した再生骨材の生産方法において、スクリーン装置の排出側と磨鉱装置との間にブラストロータへ研磨粒を供給する系統を形成し、選別スクリーン装置で分級した再生骨材の一部を研磨粒として磨鉱装置の本体内へ還流させたことを特徴とする、再生骨材の生産方法を提供する。
The present invention is a reclaimed aggregate grinding device that grinds and recycles the recycled aggregate taken out of the concrete waste and removes the attached mortar, the grinding device being rotatable about a vertical axis, A blast rotor that radiates abrasive grains by centrifugal force, a main body that houses the blast rotor and forms a deposition layer around the blast rotor, and is placed directly above the blast rotor in the main body to deposit recycled aggregate A distribution body that diffuses toward the layer, a system that supplies abrasive grains to the blast rotor, and a system that supplies reclaimed aggregate to the main body, continuously from the rotating blast rotor toward the deposition layer There is provided a grinding apparatus characterized in that a regenerated aggregate is dropped into a radiation area of radiated abrasive grains to remove adhering mortar.
The present invention provides a polishing apparatus according to the above-described polishing apparatus, wherein an opening for discharging abrasive grains deposited in a deposition layer into the main body is provided in a part of the main body.
The present invention provides a grinding apparatus characterized in that in any of the above-described grinding apparatuses, means for applying vibration to the main body is added.
The present invention includes a step of crushing concrete waste containing recycled aggregate with a crusher, a classifying step of classifying the crushed material with a screen device and taking out the regenerated aggregate, and grinding the extracted crushed aggregate with a grinding device. A reclaimed aggregate production method including a grinding step for removing adhering mortar, wherein the grinding device is the grinding device according to any one of claims 1 to 3 and rotates. The process of continuously radiating abrasive grains from the blast rotor toward the deposited layer and the process of dropping the regenerated aggregate into the radiation area of the abrasive grains are performed in parallel, and the abrasive grains collide with the regenerated aggregate. Provided is a method for producing recycled aggregate, which is characterized by removing adhered mortar.
The present invention provides a recycled aggregate produced by forming a system for supplying abrasive grains to the blast rotor between the discharge side of the screen device and the grinding device in the above-described method for producing recycled aggregate, Provided is a method for producing recycled aggregate, characterized in that the part is recirculated as abrasive grains into the main body of the grinding apparatus.
 本発明は少なくともつぎの1つの効果を得ることができる。
(1)落下中の再生骨材に小粒の研磨粒を衝突させるだけで再生骨材そのものを過剰に破砕せずに、付着モルタルだけを効率よく除去することができる。
(2)従来の再破砕方式にあっては、モルタルの除去率を高めるに破砕回数を増す必要があった。
 これに対し本発明では、再生骨材が堆積層の傾斜面に沿って転がり落ちる際に、再生骨材が堆積層を通過する時間と距離を長く確保できるため、再生骨材が自然落下する場合と比較して格段に付着モルタルの除去効率がよくなる。
 したがって、従来と比較して再生骨材の磨鉱回数を減らすことが可能となる。
(3)再生骨材を過破壊せずに付着モルタルを除去できるので、再生骨材の磨鉱回数の影響を受けずに、破砕物の全投入量に対する特定サイズ以上の再生骨材(例えば5mm以上の再生粗骨材)の回収量を増加させることができて歩留まりを改善することができる。
(4)再生骨材の一部を回収したものを研磨粒として活用するので、別途に新たな金属粒等のブラスト材を準備する必要がなく、しかも研磨粒が再生骨材そのものであるから、最終的に研磨粒だけを分離回収する必要がないため経済的である。
(5)衝撃に対してクッション材となる付着モルタルが再生骨材とともに磨鉱装置の外部へ自然落下により排出されて磨鉱装置内に蓄積され難い。そのため、付着モルタルの良好な除去性能を長期間に亘って維持することができる。
(6)磨鉱装置の本体に振動を与える手段を付加することで堆積層の傾斜面の表層に粒度の大きな骨材が浮き出るため、堆積層の傾斜面の表層側が研磨粒群によって被覆されるのを回避することができる。
 そのため、付着モルタルの除去効率が更に高くなる。
(7)本体の一部に開口を設け、堆積層に堆積した研磨粒を前記開口を通じて排出するように構成すると、堆積層を粒度の大きな骨材で構成し易くなって、再生骨材の良好な付着物の除去作用の持続性がさらによくなる。
 殊に、磨鉱装置の本体に振動を与える手段を併設すれば、堆積層に堆積した研磨粒を自動的に排出できるから、定期的にマシンを停止して作業員が堆積層に堆積した研磨粒を取り除くメンテナンス作業が不要となる。
The present invention can obtain at least one of the following effects.
(1) Only the adhering mortar can be efficiently removed without excessively crushing the reclaimed aggregate itself simply by causing small abrasive grains to collide with the regenerated aggregate being dropped.
(2) In the conventional re-crushing method, it was necessary to increase the number of crushing times in order to increase the removal rate of mortar.
On the other hand, in the present invention, when the recycled aggregate rolls down along the inclined surface of the deposited layer, it is possible to ensure a long time and distance for the recycled aggregate to pass through the deposited layer. Compared with, the removal efficiency of adhered mortar is significantly improved.
Therefore, it is possible to reduce the number of times of grinding the recycled aggregate as compared with the prior art.
(3) Since the attached mortar can be removed without overdamaging the regenerated aggregate, the regenerated aggregate (for example, 5 mm) having a specific size or more with respect to the total input amount of the crushed material without being affected by the number of times of grinding of the regenerated aggregate. The recovered amount of the above recycled coarse aggregate) can be increased, and the yield can be improved.
(4) Since a part of the recycled aggregate is used as abrasive grains, there is no need to prepare a new blasting material such as metal grains, and the abrasive grains are the recycled aggregate itself. Finally, it is economical because it is not necessary to separate and collect only the abrasive grains.
(5) Adhering mortar that becomes a cushion material against impact is discharged together with the recycled aggregate to the outside of the grinding apparatus by natural fall and is not easily accumulated in the grinding apparatus. Therefore, it is possible to maintain good removal performance of the attached mortar over a long period of time.
(6) By adding a means for applying vibration to the main body of the grinding apparatus, aggregates having a large particle size are exposed on the surface of the inclined surface of the deposited layer, so that the surface layer side of the inclined surface of the deposited layer is covered with abrasive grains. Can be avoided.
Therefore, the removal efficiency of adhesion mortar becomes still higher.
(7) When an opening is provided in a part of the main body and the abrasive grains accumulated in the deposited layer are discharged through the opening, the deposited layer can be easily composed of an aggregate having a large particle size, and the recycled aggregate is good. Persistence of the action of removing the extraneous matter is further improved.
In particular, if a means for applying vibration is added to the main body of the grinding apparatus, abrasive grains deposited on the deposited layer can be automatically discharged. Therefore, the machine is periodically stopped and the worker deposits on the deposited layer. Maintenance work to remove the grains is not necessary.
本発明の実施例1にかかる再生骨材の生産方法の概略説明図Schematic explanatory drawing of the production method of the reproduction aggregate concerning Example 1 of the present invention. 実施例1にかかる磨鉱装置の中央縦断面図Central longitudinal cross-sectional view of the grinding apparatus according to Example 1 図2におけるIII-IIIの断面図Sectional view of III-III in Fig. 2 再生骨材の磨鉱工程を説明するための磨鉱装置の要部の部分断面図Partial sectional view of the main part of the grinding equipment for explaining the grinding process of recycled aggregate 研磨粒が衝突する前の再生骨材の部分断面図Partial sectional view of recycled aggregate before abrasive grains collide 研磨粒が衝突したときの再生骨材の部分断面図Partial cross section of recycled aggregate when abrasive grains collide 実施例2にかかる磨鉱装置の要部の部分断面図Partial sectional drawing of the principal part of the grinding apparatus concerning Example 2. FIG. 実施例3にかかる再生骨材の生産方法の概略説明図Schematic explanatory drawing of the production method of the reproduction aggregate concerning Example 3.
[実施例1]
 以下に図面を参照しながら本発明の実施の形態について説明する。
[Example 1]
Embodiments of the present invention will be described below with reference to the drawings.
<1>再生骨材の生産プラントの概要
 図1は磨鉱装置10による再生骨材の磨鉱工程と、選別スクリーン装置40による分級工程とよりなる再生骨材の生産方法の生産フローを示し、図2~図4は磨鉱装置を示し、図5,6は付着モルタルの除去原理の説明図である。
<1> Overview of Recycled Aggregate Production Plant FIG. 1 shows a production flow of a reclaimed aggregate production method comprising a reclaimed aggregate grinding process by the grinding apparatus 10 and a classification screen apparatus 40 classification process. FIGS. 2 to 4 show the grinding apparatus, and FIGS. 5 and 6 are explanatory views of the principle of removing the adhered mortar.
 本発明に係る磨鉱装置10は、選別スクリーン装置40で分級した再生細骨材(再生砂)の一部を研磨粒として使用しつつ、落下する再生骨材に対して研磨粒を吹き付けて付着モルタルを除去するものである。 The grinding apparatus 10 according to the present invention uses a part of the recycled fine aggregate (regenerated sand) classified by the sorting screen device 40 as abrasive grains, and sprays the abrasive grains on the falling recycled aggregate to adhere. The mortar is removed.
 再生骨材Aとは粗骨材や細骨材を含んでいて、各種の現場で発生したコンクリートガラをジョークラッシャー等で100mm~120mm程度の大きさに破砕した後、公知の破砕機で以って50mm以下のサイズに破砕した破砕物を意味する。
 以降に再生骨材の生産に使用する主要な装置について詳述する。
Recycled aggregate A includes coarse aggregate and fine aggregate, and after crushing concrete gravel generated at various sites to a size of about 100 mm to 120 mm with a jaw crusher, etc., it can be done with a known crusher. Means a crushed product crushed to a size of 50 mm or less.
In the following, the main devices used for the production of recycled aggregate will be described in detail.
<2>磨鉱装置
 磨鉱装置10は骨材に付着したモルタルをショットブラストにより除去する装置で、鉛直軸を中心に一方向に回転するドラム状のブラストロータ20と、ブラストロータ20を収容する本体30と、本体30内でブラストロータ20の真上に配置した円錐形の分配体31とを具備する。
 さらに磨鉱装置10は本体30内へ再生骨材を供給する系統と、ブラストロータ20へ硬質の研磨粒を供給する系統とを具備している。
 図2,3に基づき磨鉱装置10を詳しく説明する
<2> Grinding device The grinding device 10 is a device that removes mortar adhering to the aggregate by shot blasting, and houses a drum-shaped blast rotor 20 that rotates in one direction around a vertical axis, and a blast rotor 20. A main body 30 and a conical distributor 31 disposed in the main body 30 directly above the blast rotor 20 are provided.
Further, the grinding apparatus 10 includes a system for supplying recycled aggregate into the main body 30 and a system for supplying hard abrasive grains to the blast rotor 20.
The grinding apparatus 10 will be described in detail with reference to FIGS.
<2.1>ブラストロータ
 ブラストロータ20は遠心力により硬質の研磨粒Bを噴射する回転ドラムで、天板21及び底板22と、それらの周縁部を連結する側板23とで包囲してドラム状に形成する。
 ブラストロータ20はその天板21の中央に供給口24を形成し、内部には縦板で区画した放射状の放射路25を形成している。側板23に露出した放射路25の端部は噴射口26として形成されている。
 供給口24、放射路25および噴射口26は連通していて、供給口24を通じて連続して投入される研磨粒Bを放射路25を経て噴射口26から水平に高速噴射できるようになっている。
<2.1> Blast Rotor The blast rotor 20 is a rotating drum that injects hard abrasive grains B by centrifugal force, and is surrounded by a top plate 21 and a bottom plate 22 and a side plate 23 that connects the peripheral portions of the drum. To form.
The blast rotor 20 has a supply port 24 formed in the center of the top plate 21 and a radial radiation path 25 partitioned by a vertical plate inside. An end portion of the radiation path 25 exposed to the side plate 23 is formed as an injection port 26.
The supply port 24, the radiation path 25, and the injection port 26 communicate with each other so that the abrasive grains B continuously introduced through the supply port 24 can be sprayed from the injection port 26 through the radiation path 25 at high speed horizontally. .
 底板22の下部中央には鉛直の回転軸27を取り付けていて、図示しない駆動源(モータ等)の回転を受けたブラストロータ20が回転軸27を中心に一方向へ向けて回転することができる。 A vertical rotation shaft 27 is attached to the lower center of the bottom plate 22, and the blast rotor 20 that receives the rotation of a drive source (such as a motor) (not shown) can rotate in one direction around the rotation shaft 27. .
 ブラストロータ20としては例えば公知の遠心破砕機を構成するロータを代用することも可能である。 As the blast rotor 20, for example, a rotor constituting a known centrifugal crusher can be substituted.
 本発明では研磨粒Bの噴射手段として、ブラストロータ20の回転遠心力を利用するため、圧縮空気を高速噴射する特殊な噴射装置が不要であり、大量の研磨粒を360度の広範囲に向けて高速投射することができる。 In the present invention, since the rotational centrifugal force of the blast rotor 20 is used as the means for injecting the abrasive grains B, a special injection device for injecting compressed air at a high speed is not required, and a large amount of abrasive grains are directed to a wide range of 360 degrees. Can project at high speed.
<2.2>本体
 本体30はその内部にブラストロータ20と分配体31を収容していて、さらに内部に磨鉱室32を形成している。
<2.2> Main Body The main body 30 accommodates the blast rotor 20 and the distributor 31 therein, and further forms a grinding chamber 32 therein.
 磨鉱室32内にはブラストロータ20の周囲に環状の棚板33を形成していて、棚板33上に再生骨材Aや研磨粒Bによる堆積層34を形成することができる。
 堆積層34は再生骨材Aの落下速度を減速してブラスト時間を長くすることと、研磨粒Bから本体30を保護するために機能する。
 したがって、堆積層34の高さと勾配を選択することにより研磨粒Bの投射による再生骨材Aのブラスト時間が調整可能である。
An annular shelf board 33 is formed around the blast rotor 20 in the grinding chamber 32, and a deposited layer 34 made of recycled aggregate A and abrasive grains B can be formed on the shelf board 33.
The deposited layer 34 functions to slow down the fall speed of the regenerated aggregate A to increase the blast time and to protect the main body 30 from the abrasive grains B.
Therefore, the blast time of the recycled aggregate A by the projection of the abrasive grains B can be adjusted by selecting the height and gradient of the deposited layer 34.
 本体30の最上部には骨材投入路35と研磨粒投入路36を形成している。
 骨材投入路35は分配体31へ向けて再生骨材Aを投入できる位置に形成されている。
 研磨粒投入路36は分配体31を貫通し、さらに研磨粒投入路36の下部がブラストロータ20の供給口24へ達する長さに形成されている。
An aggregate input path 35 and an abrasive grain input path 36 are formed at the top of the main body 30.
The aggregate input path 35 is formed at a position where the recycled aggregate A can be input toward the distributor 31.
The abrasive grain charging path 36 penetrates the distributor 31 and is formed to have a length that allows the lower part of the abrasive grain charging path 36 to reach the supply port 24 of the blast rotor 20.
 図3では骨材投入路35を研磨粒投入路36に隣り合わせた形態に形成した場合を示しているが、研磨粒投入路36の周囲に環状の骨材投入路35が位置するように多重同心円の形態に形成してもよい。
 さらに骨材投入路35と研磨粒投入路36の断面形状は図示した円形に限定されるものではなく、その他に矩形や多角形等の公知の形状でもよい。
Although FIG. 3 shows a case where the aggregate input path 35 is formed in a form adjacent to the abrasive grain input path 36, multiple concentric circles are provided so that the annular aggregate input path 35 is positioned around the abrasive grain input path 36. You may form in the form of.
Furthermore, the cross-sectional shapes of the aggregate charging path 35 and the abrasive grain charging path 36 are not limited to the illustrated circle, but may be other known shapes such as a rectangle or a polygon.
 骨材投入路35および研磨粒投入路36に図示しないダンパーを装備させて、ダンパーによる各供給路35,36を通じた再生骨材Aや研磨粒Bの供給量を調整したり、再生骨材Aと研磨粒Bの供給の切換えを可能に構成することが望ましい。
 ダンパーにより研磨粒投入路36を通じた再生骨材Aの供給切換えを可能に構成すると、磨鉱装置10の運転初期において両供給路35,36を通じて再生骨材Aをブラストロータ20へ投入できるので、研磨粒Bの必要量を先行して生産することができる。
The aggregate input path 35 and the abrasive grain input path 36 are equipped with dampers (not shown) to adjust the supply amount of the recycled aggregate A and abrasive grains B through the supply paths 35 and 36 by the damper, or the recycled aggregate A It is desirable that the supply of abrasive grains B can be switched.
If the damper is configured so that the supply of the recycled aggregate A can be switched through the abrasive grain charging path 36, the recycled aggregate A can be input to the blast rotor 20 through the both supply paths 35 and 36 in the initial operation of the grinding apparatus 10. The required amount of abrasive grains B can be produced in advance.
<2.3>分配体
 分配体31は磨鉱室32内に投入された再生骨材Aの落下速度の減速と落下範囲の拡散を図るためのもので、ブラストロータ20の上方に配設されている。
 分配体31の全体形状は円錐体に限らず角錐体であっもてよく、要は落下する再生骨材を均等に分散して環状の堆積層34へ向けて誘導できる形状であればよい。
<2.3> Distributor The distributor 31 is for reducing the fall speed of the recycled aggregate A put into the grinding chamber 32 and spreading the fall range, and is disposed above the blast rotor 20. ing.
The overall shape of the distributor 31 is not limited to a cone, but may be a pyramid. In short, it may be any shape as long as the regenerated aggregate that is dropped can be evenly distributed and guided toward the annular deposition layer 34.
<3>供給系統
 図1において、磨鉱装置10は本体30内へ原材料を供給する破砕物供給系統L1と、磨鉱装置10から選別スクリーン装置40へ再生骨材を供給する再生骨材供給系統L2と、選別スクリーン装置40で分離回収した硬質の研磨粒を磨鉱装置10のブラストロータ20へ供給する研磨粒供給系統L3と、選別スクリーン装置40で分離回収した再生骨材を磨鉱装置10へ供給する再生骨材還流系統L4とを具備している。
<3> Supply System In FIG. 1, the grinding apparatus 10 includes a crushed material supply system L 1 that supplies raw materials into the main body 30, and a recycled aggregate supply that supplies recycled aggregates from the grinding apparatus 10 to the sorting screen device 40. and line L 2, a sorting screen device abrasive supply line L 3 for supplying abrasive particles separated recovered hard at 40 to blast the rotor 20 of Migakuko device 10, it was separated and recovered by the sorting screen device 40 recycled aggregate grinding A recycled aggregate reflux system L 4 to be supplied to the mining apparatus 10 is provided.
<3.1>破砕物供給系統
 破砕物供給系統L1はコンクリートガラを公知の破砕機で以って50mm以下のサイズに破砕した破砕物を磨鉱装置20の磨鉱室32へ供給する系統である。
 コンクリートガラの破砕物には再生骨材の原料となる粗骨材や細骨材を含んでいて、磨鉱装置20を通過する際に付着モルタルが除去される。
<3.1> Crushed material supply system The crushed material supply system L 1 is a system for supplying the crushed material crushed to a size of 50 mm or less with a known crusher to a grinding chamber 32 of the grinding apparatus 20. It is.
The crushed concrete glass contains coarse aggregates and fine aggregates as raw materials for recycled aggregates, and adhering mortar is removed when passing through the grinding apparatus 20.
<3.2>再生骨材供給系統
 再生骨材供給系統L2は磨鉱装置10から選別スクリーン装置40へ向けて磨鉱を終えた再生骨材を供給する系統である。
 磨鉱装置10で磨鉱を終えた破砕物を、選別スクリーン装置40へ供給して所定のサイズに分級する。
<3.2> recycled aggregate supply system recycled aggregate supply system L 2 is a system for supplying recycled aggregate finishing the Migakuko toward the Migakuko device 10 to the sorting screen device 40.
The crushed material that has been polished by the polishing apparatus 10 is supplied to the sorting screen apparatus 40 and classified into a predetermined size.
<3.3>研磨粒供給系統
 研磨粒供給系統L3は選別スクリーン装置40から磨鉱装置10のブラストロータ20へ向けて研磨粒を供給する系統で、選別スクリーン装置40で分級した再生骨材のうち、研磨粒に適した再生細骨材(再生砂)を取り出して磨鉱装置10のブラストロータ20へ還流することができる。
 研磨粒供給系統L3の先端は研磨粒投入路36と連通している。
<3.3> Abrasive Grain Supply System The abrasive grain supply system L 3 is a system for supplying abrasive grains from the sorting screen device 40 toward the blast rotor 20 of the grinding apparatus 10, and the recycled aggregate classified by the sorting screen device 40. Among them, recycled fine aggregate (recycled sand) suitable for abrasive grains can be taken out and returned to the blast rotor 20 of the grinding apparatus 10.
The tip of the abrasive grain supply system L 3 communicates with the abrasive grain introduction path 36.
<3.4>再生骨材還流系統
 再生骨材還流系統L4は選別スクリーン装置40で分級した再生骨材のうち、分級した再生粗骨材(再生骨材)を磨鉱装置10の本体30内へ供給する系統である。
 再生骨材還流系統L4の先端は直接、或いは破砕物供給系統L1を経由して骨材投入路35と連通している。
<3.4> Recycled Aggregate Return System Recycled aggregate return system L 4 is a recycled aggregate classified by the sorting screen device 40, and classified coarse aggregate (regenerated aggregate) is the main body 30 of the grinding apparatus 10. It is a system that supplies the inside.
The tip of the recycled aggregate reflux system L 4 communicates with the aggregate input path 35 directly or via the crushed material supply system L 1 .
 尚、図1の符号51,52は研磨粒供給系統L3と再生骨材還流系統L4に設けた貯留タンクであるが、これらの貯留タンク51,52は必須ではない。 Although reference numeral 51 in FIG. 1 is a storage tank provided in the abrasive supply line L 3 and recycled aggregate reflux line L 4, these storage tanks 51 and 52 is not essential.
<4>選別スクリーン装置
 選別スクリーン装置40は破砕物を複数のサイズに分級する装置で、階層的に配置した篩目サイズの異なる複数の篩41と送風器42とを具備している。
 選別スクリーン装置40には配管を介して集塵装置43が接続していて、選別スクリーン装置40内に舞う微粉を吸引回収できるようになっている。
<4> Sorting Screen Device The sorting screen device 40 is a device that classifies crushed materials into a plurality of sizes, and includes a plurality of sieves 41 and blowers 42 that are arranged hierarchically and have different mesh sizes.
A dust collecting device 43 is connected to the sorting screen device 40 via a pipe so that the fine powder floating in the sorting screen device 40 can be sucked and collected.
[再生骨材の生産方法]
 つぎに再生骨材の生産方法について説明する。
[Production method of recycled aggregate]
Next, a method for producing recycled aggregate will be described.
<1>磨鉱工程
 図1において、破砕物供給系統L1を通じて50mm以下に破砕した破砕物を磨鉱装置10へ向けて供給を開始し、並行して研磨粒供給系統L3を通じて磨鉱装置10のブラストロータ20へ向けて研磨粒を供給する。
 図2~7を参照して磨鉱装置10による破砕物(再生骨材)に付着したモルタルを除去工程を以下に説明する。
<1> Grinding process In FIG. 1, supply of the crushed material crushed to 50 mm or less through the crushed material supply system L 1 toward the grinding apparatus 10 is started, and in parallel, the grinding apparatus through the abrasive grain supply system L 3. Abrasive grains are supplied to 10 blast rotors 20.
With reference to FIGS. 2 to 7, the process of removing mortar attached to the crushed material (recycled aggregate) by the grinding apparatus 10 will be described below.
<1.1>研磨粒の投射
 図2において、研磨粒投入路36を通じて回転中のブラストロータ20の中央部へ研磨粒Bを供給すると、研磨粒Bはブラストロータ20の回転遠心力を受けてブラストロータ20の側方から周囲の堆積層34へ向けて高速で噴射される。
 その結果、ブラストロータ20の周囲に環状を呈する研磨粒B群による放射域が形成される。
<1.1> Projection of Abrasive Grain In FIG. 2, when the abrasive grain B is supplied to the central portion of the rotating blast rotor 20 through the abrasive grain introduction path 36, the abrasive grain B receives the rotational centrifugal force of the blast rotor 20. Injected from the side of the blast rotor 20 toward the surrounding deposition layer 34 at high speed.
As a result, a radiation area is formed around the blast rotor 20 by the abrasive grains B having an annular shape.
<1.2>骨材の落下
 骨材投入路35を通じて磨鉱室32内へ再生骨材Aを供給する。
 投入された再生骨材Aはブラストロータ20の上面を覆った分配体31に衝突し、分配体31の傾斜面に沿って四方へ分散しながら堆積層34へ向けて転がり落ちる。
<1.2> Falling Aggregate The recycled aggregate A is supplied into the grinding chamber 32 through the aggregate input path 35.
The input recycled aggregate A collides with the distributor 31 covering the upper surface of the blast rotor 20, and rolls down toward the deposition layer 34 while being distributed in all directions along the inclined surface of the distributor 31.
<1.3>付着物の除去
 磨鉱室32内において、再生骨材Aが分配体31を通じて堆積層34へ向けて転がり落ちる際に多数の研磨粒B群の放射域を通過する。
 このとき、再生骨材Aに多数の研磨粒Bが衝突して表面に付着したモルタルが除去される。
 研磨粒Bの衝突に伴い、或いは再生骨材Aが堆積層34の傾斜面を転がり落ちるときに再生骨材Aが回転する。そのため、再生骨材Aの全周面に亘って研磨粒Bを均等に衝突させて付着物を除去することができる。
<1.3> Removal of Deposits In the grinding chamber 32, when the recycled aggregate A rolls down toward the deposition layer 34 through the distributor 31, it passes through the radiation region of a large number of abrasive grains B.
At this time, a large number of abrasive grains B collide with the recycled aggregate A, and the mortar attached to the surface is removed.
The recycled aggregate A rotates as the abrasive grains B collide or when the recycled aggregate A rolls down the inclined surface of the deposited layer 34. Therefore, it is possible to remove the deposits by causing the abrasive grains B to collide evenly over the entire circumferential surface of the recycled aggregate A.
 再生骨材同士を高速で衝突し合えば骨材そのものが破砕して小片化する確率が高くなる。
 本発明では質量(径)の小さな研磨粒Bを質量(径)の大きな再生骨材Aに衝突させるものである。
 したがって、モルタルを構成主体とした塊体に研磨粒Bが高速で衝突すると、この塊体は破砕されるが、再生骨材Aに研磨粒Bを高速で衝突させても再生骨材Aそのものが必要以上に破砕されるおそれがない。
If the recycled aggregates collide with each other at high speed, the probability that the aggregates themselves are crushed and broken into small pieces increases.
In the present invention, abrasive grains B having a small mass (diameter) are collided with recycled aggregate A having a large mass (diameter).
Accordingly, when the abrasive grains B collide with the aggregate composed mainly of mortar at high speed, the aggregate is crushed, but even if the abrasive grains B collide with the recycled aggregate A at high speed, There is no risk of crushing more than necessary.
 磨鉱室32内で除去された付着モルタルは再生骨材Aとともに自然落下するため、磨鉱室32内に蓄積され難い。したがって、後続の再生骨材Aに対しても付着モルタルCの良好な除去性能を持続することができる。 Since the adhered mortar removed in the grinding chamber 32 naturally falls together with the recycled aggregate A, it is difficult to accumulate in the grinding chamber 32. Therefore, the good removal performance of the adhesion mortar C can be maintained even for the subsequent recycled aggregate A.
<1.4>磨鉱時間について
 つぎに付着モルタルを効率よく除去できる幾つかの要因について詳しく説明する。
 図4は再生骨材Aの磨鉱工程を詳しく説明するためのモデル図を示している。
 再生骨材Aが堆積層34の傾斜面に沿って転がり落ちる際に、研磨粒Bが横から当たって付着モルタルCが除去されるわけであるが、以下の要因により再生骨材Aが堆積層34を通過する時間と距離を長く確保できるため効率のよい磨鉱が行える。
<1.4> About the grinding time Next, some factors that can effectively remove the adhered mortar will be described in detail.
FIG. 4 shows a model diagram for explaining the grinding process of the recycled aggregate A in detail.
When the recycled aggregate A rolls down along the inclined surface of the deposited layer 34, the abrasive grains B hit from the side and the attached mortar C is removed, but the recycled aggregate A is deposited by the following factors. Since the time and distance passing through 34 can be secured for a long time, efficient grinding can be performed.
 その要因のひとつは、再生骨材Aが多数の研磨粒Bの衝撃を受けて堆積層34へ向けて押付けられることである。前記横向きの押付け力は再生骨材Aの自然落下の抵抗要素となり、その結果、再生骨材Aが堆積層34を通過する時間(磨鉱時間)が長くなる。
 研磨粒Bの単位時間当たりの噴射数(量)が一定であれば、再生骨材Aへの衝突時間に比例して衝突数が増大するため、付着モルタルCの除去効率がよくなる。
One of the factors is that the recycled aggregate A is pressed toward the deposition layer 34 under the impact of a large number of abrasive grains B. The lateral pressing force becomes a resistance element of the natural fall of the regenerated aggregate A, and as a result, the time for the reclaimed aggregate A to pass through the deposited layer 34 (the grinding time) becomes longer.
If the number (amount) of the abrasive particles B sprayed per unit time is constant, the number of collisions increases in proportion to the collision time with the recycled aggregate A, and the removal efficiency of the adhered mortar C is improved.
 他の要因は、ブラストロータ20が回転しながら研磨粒B群を連続的に放射するため、再生骨材Aにロータの回転方向へ沿った旋回力が作用する。
 したがって、再生骨材Aは堆積層34の傾斜面に対して旋回しながら斜めに転がり落ちることになる。再生骨材Aが堆積層34の傾斜面を斜めに移動すれば、真下に転がり落ちる場合と比べて、再生骨材Aの通過距離と通過時間が長くなる。
 再生骨材Aの通過距離が長くなれば再生骨材Aへの衝突時間が長くなるため、付着モルタルCの除去効率がよくなる。
Another factor is that the abrasive grains B are continuously emitted while the blast rotor 20 rotates, so that the revolving aggregate A acts on the revolving aggregate A in the rotational direction of the rotor.
Therefore, the recycled aggregate A rolls down obliquely while turning with respect to the inclined surface of the deposited layer 34. If the regenerated aggregate A moves obliquely on the inclined surface of the deposited layer 34, the passage distance and the passage time of the regenerated aggregate A become longer than when the regenerated aggregate A rolls right below.
As the passing distance of the regenerated aggregate A becomes longer, the collision time with the regenerated aggregate A becomes longer, and the removal efficiency of the adhered mortar C is improved.
 尚、図5,6は付着モルタルCが除去されるメカニズムを示すもので、図5は研磨粒Bが衝突する前の再生骨材Aを示し、図6は研磨粒Bが衝突したときの再生骨材Aを示す。 5 and 6 show the mechanism by which the adhered mortar C is removed, FIG. 5 shows the recycled aggregate A before the abrasive grains B collide, and FIG. 6 shows the regeneration when the abrasive grains B collide. Aggregate A is shown.
<2>分級工程
 図1において、磨鉱装置10で磨鉱したすべての再生骨材が再生骨材供給系統L2を通じて選別スクリーン装置40へ供給される。
 磨鉱装置10は送風器42の風力で再生骨材を吹き飛ばし、重さの軽重に基づいてエアー分級(風力分離)するとともに、篩目サイズの異なる複数の篩41を透過させて複数のサイズに篩い分けする。
 選別スクリーン装置40内に舞うモルタル等の微粉は、集塵装置43で吸引回収する。
<2> Classifying Step In FIG. 1, all recycled aggregates polished by the grinding apparatus 10 are supplied to the sorting screen apparatus 40 through the recycled aggregate supply system L 2 .
The grinding apparatus 10 blows off the recycled aggregate with the wind force of the blower 42, classifies the air based on the weight of the weight (wind separation), and transmits a plurality of sieves 41 having different sieve sizes to a plurality of sizes. Sift out.
The fine powder such as mortar that floats in the sorting screen device 40 is sucked and collected by the dust collecting device 43.
<3>研磨粒の還流
 選別スクリーン装置40で分級した5mm未満の再生細骨材(再生砂)の一部を研磨粒として、研磨粒供給系統L3を通じて磨鉱装置10のブラストロータ20へ還流する。
 研磨粒は継続して磨鉱装置10へ還流して使用するため、別途に新たな金属質のブラスト材を準備する必要がなく、しかも研磨粒が再生細骨材(再生砂)そのものであるから、最終的に研磨粒だけを分離回収する必要がないため経済的である。
<3> recirculating a part of the reproduction fine aggregate classification was less than 5mm in abrasive particles of reflux sorting screen device 40 (play sand) as abrasive particles, to blast the rotor 20 of Migakuko device 10 through the abrasive particle supply system L 3 To do.
Since the abrasive grains are continuously returned to the grinding apparatus 10 for use, it is not necessary to prepare a new metallic blast material separately, and the abrasive grains are recycled fine aggregate (recycled sand) itself. Finally, it is economical because it is not necessary to separate and collect only the abrasive grains.
<4>再生骨材の還流
 磨鉱装置10を一回通過させた磨鉱で再生骨材に付着したモルタルを完全に除去することは難しい。
 そこで再生骨材還流系統L4を通じて、選別スクリーン装置40で分級した再生骨材を磨鉱装置10の本体30内へ還流して再磨鉱と分級を繰り返す。
 再生骨材の還流回数は、モルタルの除去具合を見ながら、適宜の回数を繰り返す。
<4> Recirculation of recycled aggregate It is difficult to completely remove the mortar attached to the recycled aggregate with the grinding that has passed through the grinding apparatus 10 once.
Therefore, the recycled aggregate classified by the sorting screen device 40 is returned to the main body 30 of the grinding apparatus 10 through the recycled aggregate return system L 4 and re-milling and classification are repeated.
The number of recycles of the recycled aggregate is repeated an appropriate number while observing how the mortar is removed.
[実施例2]
 図7に他の磨鉱装置10を示す。
 本例における磨鉱装置10の基本的な構成と作用は既述した実施例1と同様であるので詳しい説明を省略する。
[Example 2]
FIG. 7 shows another grinding apparatus 10.
Since the basic configuration and operation of the grinding apparatus 10 in this example are the same as those in the first embodiment described above, detailed description thereof will be omitted.
 本例では堆積層34を加振するように本体30に振動を与える手段を付加するとともに、本体30の一部に開口を設けて堆積層34に堆積する研磨粒Bを取り除くことができるようにしたものである。 In this example, a means for applying vibration to the main body 30 is added so as to vibrate the deposited layer 34, and an opening is provided in a part of the main body 30 so that the abrasive grains B deposited on the deposited layer 34 can be removed. It is a thing.
<1>堆積層の加振
 磨鉱装置10は堆積層34に振動を与える手段を具備する。
 堆積層34に振動を与える手段としては、例えば本体30に付設した振動モータ37により振動させることが可能である。
 また振動モータ37以外に、本体30が振動するように公知の揺動機構を適用してもよい。
<1> Excitation of deposited layer The grinding apparatus 10 includes means for applying vibration to the deposited layer 34.
As a means for applying vibration to the deposited layer 34, for example, it is possible to vibrate by a vibration motor 37 attached to the main body 30.
In addition to the vibration motor 37, a known swing mechanism may be applied so that the main body 30 vibrates.
 ブラストロータ20から放射された一部の研磨粒B群によって、堆積層34の傾斜面の表面側が被覆されると、研磨粒B群の被覆がクッションとなって研磨粒Bの衝撃が吸収される可能性がある。
 そこで、振動モータ37等により堆積層34に振動を与えると、図示するように堆積層34の傾斜面の表層に粒径の大きな再生骨材Aが浮き出し、粒径の小さな研磨粒Bが堆積層34の深部へ潜入する。
 したがって、堆積層34の傾斜面の表面は常に粒径の大きな再生骨材A群で覆われるから、研磨粒Bの衝撃が堆積層34で減衰され難くなり、研磨粒B群による再生骨材Aの良好な磨鉱作用が長期間に亘って持続可能となる。
When the surface side of the inclined surface of the deposition layer 34 is covered by a part of the abrasive grains B emitted from the blast rotor 20, the coating of the abrasive grains B serves as a cushion to absorb the impact of the abrasive grains B. there is a possibility.
Therefore, when vibration is applied to the deposited layer 34 by the vibration motor 37 or the like, as shown in the drawing, the regenerated aggregate A having a large particle size is raised on the surface layer of the inclined surface of the deposited layer 34, and the abrasive particles B having a small particle size are formed into the deposited layer. Infiltrate the depth of 34.
Therefore, since the surface of the inclined surface of the deposited layer 34 is always covered with the regenerated aggregate A group having a large particle size, the impact of the abrasive grains B is not easily attenuated by the deposited layer 34, and the regenerated aggregate A by the abrasive grains B group. A good grinding effect can be sustained over a long period of time.
<2>研磨粒の回収
 本例では研磨粒Bを回収する手段として、堆積層34を形成する棚板33の一部に開口38を開設するとともに、棚板33の下方に位置する本体30の側板30aの一部にも回収口39を開設する。
 本例にあっては、前記開口38,39を通じて堆積層34の下層に堆積した粒径の小さな再生骨材Aや研磨粒Bを取り除くことができる。
 堆積層34に強制的な振動を付与することで開口38,39を通じた粒径の小さな再生骨材Aや研磨粒Bの排出を促進できる。
<2> Recovery of Abrasive Grains In this example, as a means for recovering the abrasive grains B, an opening 38 is opened in a part of the shelf 33 that forms the deposition layer 34 and the main body 30 located below the shelf 33 is provided. A recovery port 39 is also opened in a part of the side plate 30a.
In this example, it is possible to remove the regenerated aggregate A and the abrasive grains B having a small particle size deposited under the deposition layer 34 through the openings 38 and 39.
By applying a forced vibration to the deposited layer 34, it is possible to promote the discharge of the recycled aggregate A and the abrasive grains B having a small particle diameter through the openings 38 and 39.
 堆積層34に堆積した研磨粒Bを放置すると、上記したように粒径の小さな再生骨材A群や研磨粒B群の被覆がクッション材となって研磨粒Bの衝撃が吸収される可能性がある。そのため、定期的にマシンの運転を停止して作業員が堆積層34に堆積した粒径の小さな再生骨材A群や研磨粒B群を取り除く必要がある。
 本例のように、堆積層に堆積した粒径の小さな再生骨材A群や研磨粒B群を自動的に排出可能に構成することで上記した定期的なメンテナンス作業が不要となる。
If the abrasive grains B deposited on the deposition layer 34 are left untreated, the impact of the abrasive grains B may be absorbed by the covering of the reclaimed aggregate A group and the abrasive grain B group having a small particle size as described above as a cushioning material. There is. Therefore, it is necessary to periodically stop the operation of the machine and remove the recycled aggregate A group and the abrasive grain group B having a small particle size accumulated by the worker on the deposition layer 34.
As in this example, the above-described periodic maintenance work is not required by configuring the recycled aggregate A group and the abrasive grain group B having a small particle size deposited in the deposited layer so as to be automatically discharged.
<3>他の実施形態
 上記した本体30に振動を与える手段を付加する形態と、堆積層34に堆積した研磨粒Bの回収手段を併有することが望ましいが、いずれか一方の手段のみを装備させるようにしてもよい。
<3> Other Embodiments Although it is desirable to have both a mode for adding a means for applying vibration to the main body 30 and a means for collecting the abrasive grains B deposited on the deposition layer 34, only one of the means is provided. You may make it make it.
[実施例3]
 図8に磨鉱装置10による再生骨材の磨鉱工程と、選別スクリーン装置40による分級工程とよりなる他の実施例に係る再生骨材の生産方法の生産フローを示す。
 本実施例は、研磨粒の供給系統を除いて既述した実施例1の構成と同じであるので説明を省略する。
[Example 3]
FIG. 8 shows a production flow of a reclaimed aggregate production method according to another embodiment comprising a reclaimed aggregate grinding process by the grinding apparatus 10 and a classification process by the sorting screen device 40.
Since the present embodiment is the same as the structure of the first embodiment described above except for the abrasive grain supply system, the description thereof is omitted.
 前記実施例1では、選別スクリーン装置40の排出側と磨鉱装置10のブラストロータ20との間を研磨粒供給系統L3でむすび、選別スクリーン装置40で分級した再生骨材の一部を研磨粒として取り出して磨鉱装置10へ還流させていたが、本実施例のように磨鉱装置10の外部に研磨粒貯留ホッパ51を設け、研磨粒貯留ホッパ51とブラストロータ20との間をむすぶ研磨粒供給系統L3を通じて、研磨粒貯留ホッパ51から直接磨鉱装置10のブラストロータ20へ供給するようにしてもよい。
 尚、符号50は公知の遠心破砕機である。
In the first embodiment, between the discharge side of the sorting screen device 40 and the blast rotor 20 of the grinding apparatus 10 is connected by the abrasive grain supply system L 3 , and a part of the recycled aggregate classified by the sorting screen device 40 is polished. Although it was taken out as grains and returned to the grinding apparatus 10, an abrasive grain storage hopper 51 is provided outside the grinding apparatus 10 as in this embodiment, and the gap between the abrasive grain storage hopper 51 and the blast rotor 20 is laid. through the abrasive supply system L 3, it may be supplied from the abrasive storage hopper 51 to the blast rotor 20 of the direct Migakuko device 10.
Reference numeral 50 is a known centrifugal crusher.
[実施例4]
 以上はコンクリートガラを対象にした場合について説明したが、アスファルト廃材に基づいた破砕物を対象として、アスファルト成分の除去に適用することも可能である。
[Example 4]
Although the above has described the case where concrete glass is targeted, it can also be applied to the removal of asphalt components for crushed materials based on asphalt waste.
 L1・・・・・破砕物供給系統
 L2・・・・・再生骨材供給系統
 L3・・・・・研磨粒供給系統
 L4・・・・・再生骨材還流系統
 A・・・・・・再生骨材
 B・・・・・・研磨粒
 C・・・・・・付着モルタル
 10・・・・・磨鉱装置
 20・・・・・ブラストロータ
 30・・・・・本体
 31・・・・・分配体
 32・・・・・磨鉱室
 34・・・・・堆積層
 40・・・・・選別スクリーン装置
L 1 ... Crushed material supply system L 2 ... Recycled aggregate supply system L 3 ... Abrasive grain supply system L 4 ... Recycled aggregate return system A ...・ ・ ・ Recycled aggregate B ・ ・ ・ ・ ・ ・ Abrasive grains C ・ ・ ・ Adhesive mortar 10 ・ ・ ・ Minishing equipment 20 ・ ・ ・ Blast rotor 30 ・ ・ ・ ・ ・ Main body 31 ・··· Distribution body 32 ··· Grinding chamber 34 ··· Deposited layer 40 · · · Screening device

Claims (5)

  1.  コンクリート廃材を破砕して取り出した再生骨材を磨鉱して付着モルタルを除去する再生骨材の磨鉱装置であって、
     前記磨鉱装置が鉛直軸を中心に回転可能であり、遠心力で研磨粒を放射するブラストロータと、
     前記ブラストロータを収容し、ブラストロータの周囲に堆積層を形成した本体と、
     前記本体内でブラストロータの真上に配置し、再生骨材を堆積層へ向けて拡散する分配体と、
     前記ブラストロータへ研磨粒を供給する系統と、
     前記本体へ再生骨材を供給する系統とを具備し、
     回転するブラストロータから堆積層へ向けて連続的に放射した研磨粒群の放射域に再生骨材を落下させて付着モルタルを除去することを特徴とする、
     磨鉱装置。
    A reclaimed aggregate grinding apparatus that grinds the reclaimed aggregate taken out of the waste concrete and removes the attached mortar,
    A blast rotor in which the grinding apparatus is rotatable about a vertical axis and radiates abrasive grains by centrifugal force;
    A main body that houses the blast rotor and has a deposited layer formed around the blast rotor;
    A distributor disposed within the body directly above the blast rotor and diffusing recycled aggregates toward the deposited layer;
    A system for supplying abrasive grains to the blast rotor;
    A system for supplying recycled aggregate to the main body,
    The reclaimed aggregate is dropped into the radiation area of the abrasive grains radiated continuously from the rotating blast rotor toward the deposition layer, and the adhered mortar is removed.
    Polishing equipment.
  2.  請求項1において、本体の一部に、堆積層に堆積した研磨粒を本体内へ排出する開口を設けたことを特徴とする、磨鉱装置。 2. The polishing apparatus according to claim 1, wherein an opening for discharging abrasive grains deposited in the deposition layer into the main body is provided in a part of the main body.
  3.  請求項1又は請求項2において、本体に振動を与える手段を付加したことを特徴とする、磨鉱装置。 3. A grinding apparatus according to claim 1, further comprising means for applying vibration to the main body.
  4.  再生骨材を含むコンクリート廃材を破砕機で破砕する工程と、この破砕物をスクリーン装置により分級して再生骨材を取り出す分級工程と、取り出した破砕骨材を磨鉱装置により磨鉱して付着モルタルを除去する磨鉱工程とを含む再生骨材の生産方法であって、
     前記磨鉱装置が前記請求項1乃至請求項3の何れかに記載した磨鉱装置であり、
     回転するブラストロータから堆積層へ向けて研磨粒を連続的に放射する工程と、
     研磨粒群の放射域に再生骨材を落下させる工程とを並行して行い、
     再生骨材に研磨粒を衝突させて付着モルタルを除去することを特徴とする、
     再生骨材の生産方法。
    A process of crushing concrete waste containing recycled aggregate with a crusher, a classifying process of classifying the crushed material with a screen device and taking out the regenerated aggregate, and grinding and attaching the crushed aggregate with the grinding machine A method for producing recycled aggregate, comprising a grinding step for removing mortar,
    The grinding apparatus is the grinding apparatus according to any one of claims 1 to 3,
    Radiating abrasive grains continuously from the rotating blast rotor toward the deposited layer;
    In parallel with the process of dropping the recycled aggregate to the radiation area of abrasive grains,
    It is characterized by removing adhered mortar by colliding abrasive grains with recycled aggregate,
    Production method of recycled aggregate.
  5.  請求項4において、スクリーン装置の排出側と磨鉱装置との間にブラストロータへ研磨粒を供給する系統を形成し、選別スクリーン装置で分級した再生骨材の一部を研磨粒として磨鉱装置の本体内へ還流させたことを特徴とする、再生骨材の生産方法。 5. The grinding apparatus according to claim 4, wherein a system for supplying abrasive grains to the blast rotor is formed between the discharge side of the screen apparatus and the grinding apparatus, and a part of the recycled aggregate classified by the sorting screen apparatus is used as abrasive grains. A method for producing recycled aggregate, characterized in that the recycled aggregate is returned to the main body.
PCT/JP2010/005649 2009-11-25 2010-09-16 Ore grinding device and method for producing recycled aggregate WO2011064930A1 (en)

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