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WO2010034068A1 - Dispositif de transformation de pneu - Google Patents

Dispositif de transformation de pneu Download PDF

Info

Publication number
WO2010034068A1
WO2010034068A1 PCT/AU2009/001275 AU2009001275W WO2010034068A1 WO 2010034068 A1 WO2010034068 A1 WO 2010034068A1 AU 2009001275 W AU2009001275 W AU 2009001275W WO 2010034068 A1 WO2010034068 A1 WO 2010034068A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
tyre
processing device
shreds
chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/AU2009/001275
Other languages
English (en)
Inventor
Richard Bamford
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KINGSTON INVESTMENT AND MANAGEMENT Co Ltd
Original Assignee
KINGSTON INVESTMENT AND MANAGEMENT Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU2008905017A external-priority patent/AU2008905017A0/en
Application filed by KINGSTON INVESTMENT AND MANAGEMENT Co Ltd filed Critical KINGSTON INVESTMENT AND MANAGEMENT Co Ltd
Publication of WO2010034068A1 publication Critical patent/WO2010034068A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • B02C13/28—Shape or construction of beater elements
    • B02C13/2804—Shape or construction of beater elements the beater elements being rigidly connected to the rotor
    • 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
    • B02C13/02—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft
    • B02C13/06—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor
    • 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
    • B02C13/282—Shape or inner surface of mill-housings
    • B02C13/284—Built-in screens
    • 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
    • B02C2013/28672—Feed chute arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C2210/00—Codes relating to different types of disintegrating devices
    • B02C2210/02—Features for generally used wear parts on beaters, knives, rollers, anvils, linings and the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/04—Disintegrating plastics, e.g. by milling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2030/00—Pneumatic or solid tyres or parts thereof
    • 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
    • Y02W30/62—Plastics recycling; Rubber recycling

Definitions

  • the present invention relates to a tyre processing device for processing tyres into reusable s by-products.
  • the device is particularly designed for the purpose of processing used vehicle tyres into granular particles and metal.
  • Vehicle tyres typically have three main constituents: steel belts, fabric plies and rubber. Tyreo recycling plants generally shred used vehicle tyres into granular particles in order to extract these constituents for recycling purposes.
  • the tyres are first torn into smaller pieces by a shredding machine. While some tyre pieces produced by tyre shredding machines comprise steel only or rubber only and can bes separated, most of the tyre pieces produced by tyre shredding machines will still contain a combination of steel, fibre and rubber.
  • Some tyre constructions facilitate the stripping of steel from the tyres before the tyres are0 shredded. This adds further handling to the recycling process and is only applicable to a small proportion of tyres with specific constructions. As a result of the problems identified above, only a small proportion of tyre constituents can be economically extracted and separated out for recycling purposes and a significant proportion of tyre pieces are discarded.
  • the present invention provides a tyre processing device comprising: a main chamber having a chamber opening adapted to receive vehicle tyres and a chamber wall having a plurality of perforations; a rotor mounted in the main chamber and adapted to rotate about a rotor axis, the rotor having a rotor surface with a lateral width and a circumferential length; i5 a plurality of rotor teeth projecting radially from the rotor surface, the rotor teeth being spaced at intervals both laterally across the lateral width of the rotor surface and circumferentially around the rotor surface; and at least one bar element mounted adjacent to the rotor and extending substantially parallel to the rotor axis, the bar element having a substantially straight wear surface 20 extending across the width of the rotor surface and radially spaced from the rotor teeth by a clearance extending along the straight wear surface; wherein the rotor teeth are
  • the tyre processing device further comprises a tyre conveyor to deliver the tyres to the chamber opening.
  • the chamber opening comprises first and second adjacent zones and the tyre processing device further comprises first and second rams adapted to operate within the first and second zones of the chamber opening.
  • the rams operate in opposing phases and the tyre conveyor is adapted to alternatively deliver one tyre into the first zone of the chamber opening and a following tyre into the second zone of the chamber opening.
  • the tyre processing device further comprises at least one door adapted to selectively open and close the first and second zones of the chamber opening.
  • the bar element is mounted relative to the rotor such that the wear surface converges towards the rotor narrowing the clearance between the wear surface and the rotor teeth in a direction of rotation of the rotor. Further preferably, the clearance between the bar element and the rotor teeth is approximately 4mm.
  • the tyre processing device further comprises a ram arranged adjacent the chamber opening, the ram being operational between a retracted position in which the ram is clear of the chamber opening to allow a tyre to enter the main chamber and an extended position in which the ram presses into the chamber opening, pressing the tyre against the rotor teeth.
  • the tyre processing device further comprises a vibrating pan feeder adapted to receive the shreds that pass through the perforations, the vibrating pan feeder having a screen with screen apertures adapted to retain shreds larger than the screen apertures and allow shreds smaller than the screen apertures to pass through the screen.
  • the tyre processing device further comprises a magnetic belt arranged over a portion of the vibrating pan feeder, the magnetic belt adapted to magnetically extract ferrous shreds from the pan feeder.
  • the tyre processing device further comprises a ferrous shreds conveyor to deliver the ferrous shreds from the magnetic belt to a ferrous shred receptacle.
  • the tyre processing device further comprises a fluid supply for injecting fluid into the main chamber.
  • the fluid supply is a water supply.
  • the rotor teeth are arranged on the rotor surface in a circumferential series of substantially parallel tooth rows and wherein the rotor teeth in one tooth row are laterally offset relative to the rotor teeth in an adjacent tooth row, such that the rotor teeth in the one tooth row are not circumferentially aligned with the rotor teeth in the adjacent tooth row.
  • the spacing of rotor teeth within the tooth rows and the number of tooth rows is such that any linear circumferential circular path around the rotor encounters at least one rotor tooth.
  • the bar element is formed from a laminated steel and white iron wear plate and the rotor teeth are formed from cast white iron.
  • said at least one bar element includes a first bar element and a second bar element arranged on opposite sides of the chamber opening and a third bar element arranged on substantially the opposite side of the rotor to the chamber opening.
  • the present invention provides a method for processing a tyre comprising the steps of:
  • a tyre processing device comprising: a main chamber having a chamber opening adapted to receive vehicle tyres and a chamber wall having a plurality of perforations; a rotor mounted in the main chamber and adapted to rotate about a rotor axis, the rotor having a rotor surface with a lateral width and a circumferential length; a plurality of rotor teeth projecting radially from the rotor surface, the rotor teeth being spaced at intervals both laterally across the lateral width of the rotor surface and circumferentially around the rotor surface; and at least one bar element mounted adjacent to the rotor and extending substantially parallel to the rotor axis, the bar element having a substantially straight wear surface extending across the width of the rotor surface and radially spaced from the rotor teeth by a clearance extending along the straight wear surface;
  • the tyre processing device further comprises first and second rams adapted to operate within first and second zones of the chamber opening, the method further comprising: supplying a first tyre into the first zone of the chamber opening; extending the first ram into the first zone to crush the first tyre between the first ram and the rotor; supplying a second tyre into the second zone of the chamber opening; retracting the first ram and extending the second ram into the second zone to crush the second tyre between the second ram and the rotor; and repeating the above steps to alternately crush tyres into the first and second zones of the chamber opening.
  • Fig. 1 is a side elevation view of a tyre processing device
  • Fig. 2 is a cross section showing a main chamber and rotor of the tyre processing device of Fig. 1;
  • Fig. 3 is an end elevation view of the tyre processing device of Fig. 1;
  • Fig. 4 is a top plan view of the tyre processing device of Fig. 1;
  • Fig. 5A depicts the rotor of the tyre processing device of Fig. 1;
  • Fig. 5B shows the teeth layout of the rotor of Fig. 5A;
  • Fig.6 depicts the main chamber of the tyre processing device of Fig. 1;
  • Fig. 7A shows a bar element of the tyre processing device of Fig.l in isolation
  • Fig. 7B is a cross sectional view of the bar element shown in Fig. 7A;
  • Fig. 8A is a top view of a rotor tooth of the rotor of the tyre processing device of Fig.l shown in isolation;
  • Fig. 8B is longitudinal cross section of the rotor tooth of Fig. 8A;
  • Fig. 8C is a transverse cross section of the rotor tooth of Fig. 8A.
  • FIG. 1 is a side elevation showing the tyre processing device 10 having a 5 housing 12, a tyre conveyor 14, a chute 16, a ram mechanism 18, a shredder assembly 20, a drive unit 22, a pan feeder 24 and a magnetic belt 26.
  • the shredder assembly 20 comprises a main chamber 28 having a generally cylindrical chamber wall 30 with a chamber opening 32, a rotor 34 housed in the i ⁇ main chamber 30 and three bar elements 36 mounted in the main chamber 28 at intervals around the circumference of the chamber wall 30.
  • the rotor 34 is mounted for rotation about a rotor axis 38 on a rotor shaft 40.
  • Fig. 6 depicts the chamber wall 30 in isolation and shows perforations 42 formed in the is chamber wall 30. Although only a small area of perforations 42 is depicted in Fig. 6, the perforations 42 are formed throughout the entire chamber wall 30.
  • the bar elements 36 are shown in isolation in Figs. 7A and 7B and each comprise a tapered wear plate 44 and a mounting flange 45 having bolt apertures 46.
  • the bar elements 36 are 2o formed from highly wear resistant laminated steel and white iron.
  • the bar elements 36 are mounted by bolts through the bolt apertures 46 and oriented such that the tapered wear plate 44 tapers inwardly toward the rotor 34 in the rotational direction of the rotor 34.
  • the rotor 34 shown in isolation in Figs. 5A and 5B, comprises a cylinder having a plurality of teeth recesses 48 formed in the outer surface of the rotor 34 for detachably mounting rotor teeth 50, shown in Fig. 5B.
  • the rotor teeth 50 are depicted separately in Figs. 8A to 8C and comprise rectangular blocks made of cast white iron having a central bolt aperture 52.
  • the rotor teeth 50 are bolted into the teeth recesses 48 of the rotor 34 via the bolt apertures 52,o with the bolts extending radially into the rotor 34.
  • the clearance between the bar elements 36 and the rotor teeth 50 is preferably about 4mm.
  • the rotor teeth 50 are arranged on the rotor 34 in teeth rows 54 that extend obliquely to the rotor axis 38 across the width of the rotor 34.
  • the rotor teeth 50 in adjacent teeth rows 54 eg. Rows 1 and 2 of Fig. 5B, are staggered widthwise relative to one another such that over a series of four teeth rows 54, eg. Rows 1 to 4, the rotor teeth 50 overlap one another in a widthwise direction across the width of the rotor 34.
  • the pan feeder 24 as best shown in Fig. 1, comprises an elongate shaker table having a screen with uniform apertures and a series of three extraction ducts 56.
  • the tyre conveyor 14 comprises a first conveyor belt 58 and a second conveyor belt 60, each having partitions 62.
  • the partitions 62 of the first conveyor belt 58 are staggered relative to the partitions 62 of the second conveyor belt 60.
  • the chute 16 comprises a first chute lane 64 associated with the first conveyor belt 58 and a second chute lane 66 associated with the second conveyor belt 60.
  • the first and second chute lanes 64, 66 lead to respective first and second sides of the chamber opening 32. Doors may be provided to open and close access from the first and second chute lanes 64, 66 into the chamber opening 32.
  • the ram mechanism 18 comprises a first ram 68 and a second ram 70, each operational between a retracted position, in which the ram is clear of the chamber opening 32, and an extended position, in which the ram extends into the chamber opening 32.
  • This dual conveyor and ram arrangement allows a much greater throughput of tyres.
  • a ferrous shreds conveyor 72 is arranged adjacent to the magnetic belt 26.
  • the drive unit 24 comprises two motors 74, each associated with a fly wheel 76 via a drive belt.
  • the fly wheels 76 are mounted to opposite ends of the rotor shaft 40.
  • the drive unit 24 drives the rotor 34 to rotate about the rotor axis 38. Tyres are loaded onto the tyre conveyor 14 with the partitions 62 separating each of the tyres and staggering the tyres of the first conveyor belt 58 relative to the second conveyor belt 60.
  • the ram mechanism 18 is synchronised with the tyre conveyor 14 such that the first ram 68 is in the retracted position as a first tyre is delivered from the first conveyor belt 58 via the chute 16 into the first side of the chamber opening 32. The first ram 68 then moves to the extended position, crushing the first tyre in the chamber opening 32 into the rotor 34.
  • the second ram 70 moves to the retracted position as a second tyre is delivered from the second conveyor belt 60 via the chute 16 into the second side of the chamber opening 32.
  • the first ram 68 then returns to the retracted position, as the second ram 70 moves to the extended position, crushing the second tyre in the chamber opening 32 into the rotor 34.
  • the cycle then repeats as another tyre is delivered from the first conveyor belt 58.
  • the crushing force of the rams 68, 70 on the tyres presses the tyres into the rotor teeth 50 of the rotating rotor 34.
  • the rotor teeth 50 engage the tyres and drag them with the rotor 34 as it rotates within the main chamber 28. This draws the tyres between the rotor teeth 50 and the bar elements 36, shredding and tearing the tyres into shreds.
  • Shreds larger than the perforations 42 are retained within the main chamber 28 by the chamber wall 30, while shreds smaller than the perforations 42 pass through the perforations 42 of the chamber wall 30 and fall into the vibrating pan feeder 24.
  • the shreds retained in the main chamber 28 are further shredded between the rotor teeth 50 and the bar elements 36 until they are sufficiently small to pass through the perforations 42.
  • the shreds passing through the perforations 42 are received in the vibrating pan feeder 24 and travel along the shaker table beneath the magnetic belt 26.
  • Ferrous shreds are extracted from the pan feeder 24 by the magnetic belt 26 and conveyed to a ferrous shreds conveyor 72.
  • Non-ferrous shreds vibrate along the shaker table over the screen of the pan feeder 24 and the shreds smaller than the screen apertures, "fine" shreds, pass through the screen while the shreds larger than the screen apertures, “coarse” shreds, remain on the shaker table.
  • the fine shreds are removed from below the screen and the coarse shreds are extracted via the extraction ducts 56 at the end of the shaker table.
  • the perforations 42 in the chamber wall 30 are preferably 16mm in diameter and the screen of the pan feeder 24 are preferably 9mm in diameter.
  • the shreds passing through the 16mm perforations are sufficiently small that the ferrous constituents (most commonly steel) exists in homogenous ferrous shreds (ie. without any rubber or fibre). This allows the tyre processing device 10 to extract at least approximately 90% of the ferrous constituents via the ferrous shreds conveyor 72.
  • the non-ferrous shreds are separated in the pan feeder 24 into fine shreds ⁇ 9mm and coarse shreds >9mm, which can be further sorted by shred size for various applications or further processed to extract more pure rubber and fibre material.
  • the clearance between the bar elements and the rotor teeth is preferably about 4mm.
  • the staggered arrangement of the partitions 62 delivers alternate tyres into opposite sides of the chamber opening 32, applying load to alternate sides of the rotor 34. This allows a greater throughput of tyres to be processed in the tyre processing device 10, while helping to balance the load applied to the shredding assembly 20.
  • a fluid lubricant/coolant such as water may be injected into the main chamber 28 to help cool the shredder assembly 20 and to facilitate shredding of the tyres, which are easier to shred when wet.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)

Abstract

L’invention concerne un dispositif de transformation de pneu (10) conçu pour transformer des pneus de véhicule en particules de pneu recyclables et pour trier les particules de pneu en différents constituants. Le dispositif de transformation de pneus (10) comprend un boîtier (12), une bande transporteuse de pneu (14), une goulotte de déversement (16), un mécanisme à piston (18), un ensemble déchiqueteur (20), une unité d'entraînement (22), un dispositif d'alimentation à godets (24) et une courroie magnétique (26). L'ensemble déchiqueteur (20) comprend: un logement principal (28) présentant une paroi de logement (30) généralement cylindrique munie d'une ouverture de logement (32); un rotor (34) disposé dans le logement principal (28) par intervalles autour de la circonférence de la paroi de logement (30). Le rotor (34) comprend un cylindre comportant plusieurs évidements de denture (48) créés dans la surface extérieure du rotor (34) pour y installer de manière amovible les dents (50) du rotor.
PCT/AU2009/001275 2008-09-26 2009-09-25 Dispositif de transformation de pneu Ceased WO2010034068A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2008905017 2008-09-26
AU2008905017A AU2008905017A0 (en) 2008-09-26 Rubber Product Processing Device

Publications (1)

Publication Number Publication Date
WO2010034068A1 true WO2010034068A1 (fr) 2010-04-01

Family

ID=42059211

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2009/001275 Ceased WO2010034068A1 (fr) 2008-09-26 2009-09-25 Dispositif de transformation de pneu

Country Status (1)

Country Link
WO (1) WO2010034068A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITRE20130025A1 (it) * 2013-04-11 2014-10-12 Daniele Furin Impianto per il recupero della tela e della gomma di pneumatici usati e per la fabbricazione di manufatti in materiale isolante
CN105879981A (zh) * 2016-05-10 2016-08-24 成都易顺通环保科技有限公司 固废物及生活垃圾管道运输剪切破碎装置
CN109718905A (zh) * 2019-01-28 2019-05-07 孔伟伟 一种生活垃圾高效分拣装置
CN113000098A (zh) * 2021-02-25 2021-06-22 深圳市宏恒星再生科技有限公司 建筑混凝土再生骨料的筛分研磨机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003026845A2 (fr) * 2001-09-28 2003-04-03 Republic Welding Company Rotor et contre-lame pour meuleuse rotative
EP1944087A1 (fr) * 2005-08-23 2008-07-16 Bridgestone Corporation Broyeur permettant de réduire la taille d un matériau et procédé permettant de réduire la taille d'un matériau
JP2008168196A (ja) * 2007-01-10 2008-07-24 Shibasaki Shoji:Kk 廃タイヤ切断装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003026845A2 (fr) * 2001-09-28 2003-04-03 Republic Welding Company Rotor et contre-lame pour meuleuse rotative
EP1944087A1 (fr) * 2005-08-23 2008-07-16 Bridgestone Corporation Broyeur permettant de réduire la taille d un matériau et procédé permettant de réduire la taille d'un matériau
JP2008168196A (ja) * 2007-01-10 2008-07-24 Shibasaki Shoji:Kk 廃タイヤ切断装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITRE20130025A1 (it) * 2013-04-11 2014-10-12 Daniele Furin Impianto per il recupero della tela e della gomma di pneumatici usati e per la fabbricazione di manufatti in materiale isolante
EP2789443A3 (fr) * 2013-04-11 2015-03-18 ISOL-ECO Societa' a Responsabilita' Limitata Installation de recyclage de plis et de caoutchouc de pneus usagés pour la fabrication de produits en matériau isolant
CN105879981A (zh) * 2016-05-10 2016-08-24 成都易顺通环保科技有限公司 固废物及生活垃圾管道运输剪切破碎装置
CN109718905A (zh) * 2019-01-28 2019-05-07 孔伟伟 一种生活垃圾高效分拣装置
CN109718905B (zh) * 2019-01-28 2021-03-30 重庆外宇科技有限公司 一种生活垃圾高效分拣装置
CN113000098A (zh) * 2021-02-25 2021-06-22 深圳市宏恒星再生科技有限公司 建筑混凝土再生骨料的筛分研磨机

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