EP4374966A1 - Plaque d'usure de cavité pour un rotor d'un broyeur à impacteur à arbre vertical (vsi) - Google Patents

Plaque d'usure de cavité pour un rotor d'un broyeur à impacteur à arbre vertical (vsi) Download PDF

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Publication number
EP4374966A1
EP4374966A1 EP22209820.4A EP22209820A EP4374966A1 EP 4374966 A1 EP4374966 A1 EP 4374966A1 EP 22209820 A EP22209820 A EP 22209820A EP 4374966 A1 EP4374966 A1 EP 4374966A1
Authority
EP
European Patent Office
Prior art keywords
cavity
wear plate
wear
rotor
plate
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.)
Pending
Application number
EP22209820.4A
Other languages
German (de)
English (en)
Inventor
Hodin Esbelani
Andreas Forsberg
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.)
Sandvik SRP AB
Original Assignee
Sandvik SRP AB
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
Application filed by Sandvik SRP AB filed Critical Sandvik SRP AB
Priority to EP22209820.4A priority Critical patent/EP4374966A1/fr
Priority to PCT/EP2023/079515 priority patent/WO2024115013A1/fr
Publication of EP4374966A1 publication Critical patent/EP4374966A1/fr
Pending legal-status Critical Current

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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
    • B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
    • B02C13/18—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor
    • B02C13/1807—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate
    • B02C13/1835—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate by means of beater or impeller elements fixed in between an upper and lower rotor disc
    • 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
    • B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
    • B02C13/18—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor
    • B02C13/1807—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate
    • B02C13/185—Construction or shape of anvil or impact plate
    • 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
    • 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
    • B02C19/0025—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 by means of a rotor with radially extending channels
    • 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
    • B02C19/0031—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 by means of an open top 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
    • C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
    • C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
    • C22C29/08—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on tungsten carbide

Definitions

  • This invention generally relates to a cavity wear plate for a rotor of a vertical shaft impactor (VSI) crusher.
  • the invention also relates to a rotor of a vertical shaft impact crusher comprising the cavity wear plate.
  • VSI vertical shaft impactor
  • VSI crushers find widespread use for crushing a variety of hard materials, such as rock, ore, demolished constructional materials and the like.
  • a VSI crusher comprises a housing that accommodates a horizontally aligned rotor mounted at a generally vertically extending main shaft.
  • the rotor is provided with a top aperture through which material to be crushed is fed under gravity from an elevated position.
  • the centrifugal forces of the spinning rotor eject the material outwards against a wall of compacted feed material (the stone bed) which also protects the walls of the rotor such that on impact the feed material is crushed to a desired size.
  • the rotor commonly comprises a horizontal upper disc and a horizontal lower disc provided with a centrally located distributor plate to protect the lower disc and distribute the material outwards for crushing.
  • the upper and lower discs are connected and axially separated by a plurality of upstanding rotor wall sections.
  • a top aperture is formed within the upper disc such that feed material flows downwardly towards the lower disc between the wall sections and is then ejected at high speed from the distributor plate.
  • the upper disc and lower discs are provided with wear plates (or wear parts) to protect the discs with the wear plates on the lower disc being radially mounted between the distributor plate and the wall sections and being secured at the walls sections with wear plate fixings such as wedges and the like.
  • the wear plates, and in particular the lower wear plates are therefore subjected to substantial abrasive wear which significantly reduces their operational lifetime resulting in the need for regular replacement of the wear plates at service intervals. It is not uncommon to have over 40 wear resistant components, or wear parts, protecting the rotor body. Many of these are what are referred to in the industry as rotor tips or cavity wear plates. The rotor tips are often placed at the exit of the outlet ports of the rotor body. It is usually these wear parts which experience the greatest wear and tear.
  • An object of the invention is to rotors for VSI crushers with improved wear capacity.
  • a cavity wear plate configured for mounting to a vertical rotor wall of a rotor of a VSI-crusher to protect a cavity of the vertical rotor wall, characterized in that the cavity wear plate comprises cemented carbides.
  • the cavity wear plate comprises a wear body having a top surface, a bottom surface, an external wear surface, an internal surface, in which the wear body is substantially L-shaped when viewed in transverse cross-section and comprises a radially inward section and a radially outward section that is generally substantially orthogonal to the radially inward section.
  • the cavity wear plate is configured for mounting to a vertical rotor wall of a rotor such that, in use, the radially inward section is disposed generally radially with respect to the rotor and the radially outward section is disposed generally circumferentially with respect to the rotor.
  • the external wear surface of the radially inward section is curved outwardly when viewed in transverse cross-section.
  • the internal surface of the wear body comprises an elongated recess for mounting the wear body to a vertical rotor wall.
  • the elongated recess extends longitudinally along the internal surface of the wear body.
  • the cavity wear plate comprises cemented carbides and nodular iron.
  • the cavity wear plate consists essentially of cemented carbides and nodular iron.
  • the cavity wear plate is of modular construction and comprises a plurality of cavity wear plate parts configured to fit together.
  • the cavity wear plate parts comprise an upper cavity wear plate part, an intermediate cavity wear plate part, and a lower cavity wear plate part.
  • each of the cavity wear plate parts comprises an elongated recess for mounting the wear body to a vertical rotor wall.
  • the cavity wear plate comprises a plate body section and a peripheral wear section disposed on an external wear side of the plate body.
  • the plate body comprises a metal (e.g, iron) and the peripheral wear section comprises a metal (e.g, iron) and the cemented carbides.
  • the invention provides a rotor of a VSI crusher, wherein the rotor comprises:
  • a cavity wear plate according to the invention is mounted to each vertical rotor wall to protect a cavity of each vertical rotor wall.
  • the or each cavity wear plate abuts a full length of a second trailing edge of each vertical rotor wall.
  • the invention provides a VSI crusher comprising a rotor according to the invention.
  • the term “comprise,” or variations thereof such as “comprises” or “comprising,” are to be read to indicate the inclusion of any recited integer (e.g. a feature, element, characteristic, property, method/process step or limitation) or group of integers (e.g. features, element, characteristics, properties, method/process steps or limitations) but not the exclusion of any other integer or group of integers.
  • the term “comprising” is inclusive or open-ended and does not exclude additional, unrecited integers or method/process steps.
  • VSI crusher or “vertical shaft impactor crusher” refers to a crusher of the type having a housing that accommodates a horizontally aligned rotor mounted at a generally vertically extending main shaft.
  • the rotor is provided with a top aperture through which material to be crushed is fed under gravity from an elevated position.
  • the centrifugal forces of the spinning rotor eject the material outwards against a wall of compacted feed material (the stone bed) which also protects the walls of the rotor such that on impact the feed material is crushed to a desired size.
  • the upper disc and lower discs are provided with wear plates (also referred to herein as wear parts) to protect the discs with the wear plates on the lower disc being radially mounted between the distributor plate and the wall sections and being secured at the wall sections with wear plate fixings such as wedges and the like.
  • wear plates also referred to herein as wear parts
  • the wear plates, and in particular the lower wear plates are therefore subjected to substantial abrasive wear which significantly reduces their operational lifetime resulting in the need for regular replacement of the wear plates at service intervals.
  • wear resistant components, or wear parts protecting the rotor body, including wear tips and cavity wear parts/plates.
  • the wear tips are often placed at the exit of the outlet ports of the rotor body. It is usually these wear parts which experience the greatest wear and tear.
  • CMOS wear plate or “cavity wear part” refers to a wear part for protecting a rotor of a VSI crusher that is mounted to a vertical wall of the rotor and functions to protect cavities in the rotor defined by the shape of the vertical rotor walls. Such cavities are illustrated in Figure 4 (50, 52, 54).
  • cemented carbide refers to a class of hard composite materials used extensively as cutting tools that consist of fine particles of carbide cemented into a composite by a binder metal. Cemented carbides commonly use tungsten carbide (WC), titanium carbide (TiC), silicon carbide (SiC), boron carbide (BC), or tantalum carbide (TaC) as the aggregate.
  • the composite may include additional materials, such as iron.
  • the composite sold under the tradename HX900 contains tungsten carbide and nodular iron.
  • the cemented carbide comprises a mix of different grades of carbides (granules). As used herein, this form of cemented carbide is referred to herein as "cemented carbides”. Cemented carbides and composites formed from cemented carbides are described in US4119459 and US3790353 .
  • Fig. 1 shows a rotor 1 for use in a Vertical Shaft Impact Crusher, i.e., a VSI-crusher.
  • the rotor 1 has a roof in the form of a horizontal upper disc 2 having a top wear plate 4, and a floor in the form of a horizontal lower disc 6.
  • the lower disc 6 has a hub 8 ( Fig. 2 ), which is welded to the disc 6.
  • the hub 8 is to be connected to a shaft (not shown) for rotating the rotor 1 inside the housing of a VSI-crusher.
  • the upper disc 2 has a central aperture 10 through which material to be crushed can be fed into the rotor 1.
  • the upper disc 2 is protected from rocks impacting the rotor 1 from above by the top wear plate 4.
  • the lower disc 6 is protected from wear by three lower wear plates 12, 14 and 16.
  • a distributor plate 18 is fastened to the centre of the lower disc 6. The distributor plate 18 distributes the material that is fed via the aperture 10 in the upper disc 2 and protects the lower disc 6 from wear and impact damages caused by the material fed via the aperture 10.
  • the upper and lower discs 2, 6 are separated by and held together by a vertical rotor wall which is separated into three wall segments 22, 24 and 26.
  • the gaps between the wall segments 22, 24, 26 define outflow openings 28, 30, 32, through which material may be ejected against a housing wall.
  • the respective wall segment 22, 24, 26 is protected from wear by a wear tip 34, 36, 38 located at a first trailing edge 27A of the respective wall segment 22, 24, 26.
  • Each wear tip 34, 36, 38 is mounted in a tip holder.
  • Each wall segment 22, 24, 26 is provided with a cavity wear plate 40, 42, 44 at a second trailing edge 27B of the wall segments 22, 24, 26, which will be described in more detail below.
  • the cavity wear plates protect the rotor 1 and in particular the wear tips 34, 36, 38 from material rebounding from the housing wall and from ejected material and airborne fine dust spinning around the rotor 1.
  • Fig. 4 illustrates the rotor 1 as seen from above and in operation.
  • the upper disc 2 and the top wear plate 4 are not shown in Fig. 4 for reasons of clarity.
  • the arrow R indicates the rotational direction of the rotor 1 during operation of the VSI-crusher.
  • a bed of material 46 is built up inside the rotor 1 against each of the three wall segments 22, 24, 26.
  • the bed 46 which consists of material that has been fed to the rotor 1 and then has been trapped inside it, extends from a rear support plate 48 to the wear tip 38.
  • the bed 46 protects the vertical wall segment 26 and the wear tip 38 from wear and provides a proper direction to the ejected material.
  • the arrow A describes a typical passage of a piece of rock fed to the rotor 1 via the central aperture 10 and ejected via the outflow opening 30.
  • the rotor 1 In operation the rotor 1 will have a function that resembles that of a centrifugal pump.
  • the rotor 1 "pumps" rock and high-pressure dust laden air through the outflow openings 28, 30, 32, in a direction which is indicated by the arrow A of Fig. 4 .
  • Horizontal low pressure air streams are formed on either side of the high-pressure dust laden air. It would seem, from practical experiences, that dust is "sucked” into these low-pressure air streams.
  • the horizontal dust laden low pressure air streams which are indicated by dashed arrows LP in Fig. 4 , are thus drawn towards the rotor 1, due to the outflow of high-pressure air and rock along the arrow A.
  • Figures 5A, 5B , 6A, 6B and 7 show a cavity wear plate 40 formed in three separate parts 40A, 40B and 40C configured to fit together when mounted to the second trailing edge 27B ( Figure 7 ) of a wall segment to form the elongated assembled cavity wear plate shown in Figures 6A and 6B .
  • the plate 40 (and each plate section), when viewed in transverse cross section comprises a substantially L-shaped wear body having a radially inward section 60 and a radially outward section 61 that is orthogonal to the radially inward section.
  • the plate has an inner surface 62 including an L-shaped section 63 dimensioned to abut the second trailing edge 27B of the wall segment, and an elongated recess 64 that extends longitudinally along the inner surface 62 and that upon assembly functions as a coupling means for coupling the cavity wear plate to the wall segment.
  • the plate also has an external wear surface 67 which is located at the opposite side of the wear body to the elongated recess 64 and includes a first wear surface 68 that is generally curved and disposed on the radially inward section 60 of the plate and a second wear surface 69 disposed on the radially outward section 61 of the plate.
  • the first wear surface 68 When mounted to a vertical wall segment, the first wear surface 68 is disposed generally radially with respect to the rotor 1 and the second wear surface 69 is disposed generally circumferentially with respect to the rotor 1.
  • the first and second wear surfaces 68, 69 are adapted for contacting abrasive particles and dust contained in the dust laden low pressure air streams LP circulating around the rotor 1, as illustrated in Fig. 4 .
  • the first and second wear surfaces 68, 69 are adapted for contacting dust laden low-pressure air streams denoted CA in Fig. 4 and flowing into the cavity.
  • Figure 7 shows a cavity wear plate 40 attached to a second trailing edge 27B of the wall segment 22.
  • the elongated recess 64 of plate 40 has a proximal part 65 and a distal section 66 that is wider than the proximal part.
  • the cavity wear plate 40 is mounted to the wall segment 22 by means of a bolt 70 having a shaft 71 that extends through a hole in the wall segment 22 and a bolt head 72 dimensioned to slot into the distal section 66 of the elongated recess 64.
  • Mounting of the cavity wear plate 40 involves removing the horizontal upper disc 2 and top wear plate 4 to expose the vertical wall segments, threading the shafts 71 of three mounting bolts through the apertures of each wall segment, attaching the bolt heads 72 to distal ends of the shafts 71 and then slotting the cavity wear plate parts 40A, 40B and 40C in sequence on to the bolt heads until the cavity wear plate parts abut to form a single cavity wear plate 40 mounted to the second trailing edge 27B of the wall segment 22. The bolts can then be tightened to tightly couple the cavity wear part to the wall segment.
  • the cavity wear plate parts 40A, 40B and 40C each comprise a plate body 80 formed of nodular iron and a peripheral wear region 81 that defines the first and second wear surfaces 68, 69 and is formed from nodular iron and cemented carbides.
  • the peripheral wear region 81 extends to a depth of about 5 to 30 mm.
  • the plate body and peripheral wear regions form a uniform plate part that is formed by casting. This construction while preferred, is not essential.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
EP22209820.4A 2022-11-28 2022-11-28 Plaque d'usure de cavité pour un rotor d'un broyeur à impacteur à arbre vertical (vsi) Pending EP4374966A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22209820.4A EP4374966A1 (fr) 2022-11-28 2022-11-28 Plaque d'usure de cavité pour un rotor d'un broyeur à impacteur à arbre vertical (vsi)
PCT/EP2023/079515 WO2024115013A1 (fr) 2022-11-28 2023-10-23 Plaque d'usure de cavité pour un rotor d'un broyeur à impacteur à arbre vertical (vsi)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22209820.4A EP4374966A1 (fr) 2022-11-28 2022-11-28 Plaque d'usure de cavité pour un rotor d'un broyeur à impacteur à arbre vertical (vsi)

Publications (1)

Publication Number Publication Date
EP4374966A1 true EP4374966A1 (fr) 2024-05-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP22209820.4A Pending EP4374966A1 (fr) 2022-11-28 2022-11-28 Plaque d'usure de cavité pour un rotor d'un broyeur à impacteur à arbre vertical (vsi)

Country Status (2)

Country Link
EP (1) EP4374966A1 (fr)
WO (1) WO2024115013A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3790353A (en) 1972-02-22 1974-02-05 Servco Co Division Smith Int I Hard-facing article
US4119459A (en) 1976-02-05 1978-10-10 Sandvik Aktiebolag Composite body consisting of cemented carbide and cast alloy
EP0187252A2 (fr) 1984-12-04 1986-07-16 SBM WAGENEDER Gesellschaft m.b.H. Broyeur à impact pour le concassage de rocher ou similaire
US20050017110A1 (en) * 2003-07-22 2005-01-27 Johnson Louis Wein Vertical shaft impactor with suspended impeller
KR20080005195U (ko) 2007-05-03 2008-11-06 크라텍주식회사 수직형 임팩트 크라셔의 로터
EP1545782B1 (fr) * 2002-08-28 2009-08-12 Sandvik Intellectual Property AB Organe destine au support d'une piece d'usure de concasseur
EP2142300A1 (fr) 2007-04-25 2010-01-13 Sandvik Intellectual Property Ab Partie d'usure pour un broyeur vsi et procede de reduction de l'usure sur le rotor d'un tel broyeur

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7090159B2 (en) * 2004-03-23 2006-08-15 Kennametal Inc. Invertible center feed disk for a vertical shaft impact crusher

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3790353A (en) 1972-02-22 1974-02-05 Servco Co Division Smith Int I Hard-facing article
US4119459A (en) 1976-02-05 1978-10-10 Sandvik Aktiebolag Composite body consisting of cemented carbide and cast alloy
EP0187252A2 (fr) 1984-12-04 1986-07-16 SBM WAGENEDER Gesellschaft m.b.H. Broyeur à impact pour le concassage de rocher ou similaire
EP1545782B1 (fr) * 2002-08-28 2009-08-12 Sandvik Intellectual Property AB Organe destine au support d'une piece d'usure de concasseur
US20050017110A1 (en) * 2003-07-22 2005-01-27 Johnson Louis Wein Vertical shaft impactor with suspended impeller
EP2142300A1 (fr) 2007-04-25 2010-01-13 Sandvik Intellectual Property Ab Partie d'usure pour un broyeur vsi et procede de reduction de l'usure sur le rotor d'un tel broyeur
KR20080005195U (ko) 2007-05-03 2008-11-06 크라텍주식회사 수직형 임팩트 크라셔의 로터

Also Published As

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