WO2011064930A1 - Dispositif de broyage de minerai et procédé pour produire un agrégat recyclé - Google Patents

Dispositif de broyage de minerai et procédé pour produire un agrégat recyclé 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
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English (en)
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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Filing date
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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/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/32—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/286—Feeding or discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C19/00—Other disintegrating devices or methods
    • B02C19/0012—Devices 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)
    • B02C19/0018—Devices 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary 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
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
    • B02C23/12—Separating 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION 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
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B9/00—General arrangement of separating plant, e.g. flow sheets
    • B03B9/06—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse
    • B03B9/061—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse the refuse being industrial
    • B03B9/065—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse the refuse being industrial the refuse being building rubble
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING 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
    • B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00—Use 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
    • C04B20/02—Treatment
    • C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/286—Feeding or discharge
    • B02C2013/28618—Feeding means
    • B02C2013/28681—Feed distributor plate for vertical mill
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/58—Construction or demolition [C&D] waste
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use 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

Selon la présente invention, des dépôts tels que du mortier sont efficacement éliminés tout en évitant le broyage d'agrégat recyclé. La présente invention concerne un procédé pour produire un agrégat recyclé, qui comprend une étape pour broyer du béton usagé, une étape de criblage pour cribler les matériaux broyés afin d'extraire l'agrégat recyclé, et une étape de broyage de minerai pour broyer l'agrégat broyé extrait afin d'éliminer le mortier déposé, dans lequel une étape pour émettre consécutivement des particules abrasives et une étape pour amener l'agrégat recyclé à tomber dans la zone dans laquelle le groupe de particules abrasives est émis sont effectuées en parallèle, et dans lequel les particules abrasives sont amenées en collision avec l'agrégat recyclé pour éliminer le mortier déposé.
PCT/JP2010/005649 2009-11-25 2010-09-16 Dispositif de broyage de minerai et procédé pour produire un agrégat recyclé WO2011064930A1 (fr)

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JP2009267520A JP2011111342A (ja) 2009-11-25 2009-11-25 磨鉱装置及び再生骨材の生産方法
JP2009-267520 2009-11-25

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WO2011064930A1 true WO2011064930A1 (fr) 2011-06-03

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JP6161586B2 (ja) * 2014-10-02 2017-07-12 コトブキ技研工業株式会社 粒状物質の磨砕装置
JP2017206424A (ja) * 2016-05-20 2017-11-24 株式会社ナベカヰ 大型建築物解体現場における廃コンクリート再生工法
CN111151519B (zh) * 2020-01-03 2021-03-19 安徽省海仁材料科技有限公司 一种再生混凝土颗粒表面砂浆去除装置

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CN106824450B (zh) * 2017-03-31 2019-06-21 华侨大学 一种立轴式骨料破碎装置

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