EP3525934B1 - Zerkleinerungsrolle - Google Patents

Zerkleinerungsrolle Download PDF

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Publication number
EP3525934B1
EP3525934B1 EP17768810.8A EP17768810A EP3525934B1 EP 3525934 B1 EP3525934 B1 EP 3525934B1 EP 17768810 A EP17768810 A EP 17768810A EP 3525934 B1 EP3525934 B1 EP 3525934B1
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EP
European Patent Office
Prior art keywords
roller
zone
wear
inserts
stress
Prior art date
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Active
Application number
EP17768810.8A
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English (en)
French (fr)
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EP3525934A1 (de
Inventor
Xavier Prignon
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Magotteaux International SA
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Magotteaux International SA
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Publication date
Application filed by Magotteaux International SA filed Critical Magotteaux International SA
Publication of EP3525934A1 publication Critical patent/EP3525934A1/de
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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
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/004—Shape or construction of rollers or balls
    • B02C15/005—Rollers or balls of composite construction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/30—Shape or construction of rollers

Definitions

  • the present invention relates to a grinding roller for vertical axis mills used for grinding materials such as rocks, coal, cement clinker or any other related material such as slag.
  • These rollers are particularly resistant to wear thanks to specifically shaped reinforcing inserts placed near the working surfaces of the roller allowing constant and uniform wear over the entire working surface and thus a longer lifespan.
  • Grinding rollers for vertical axis crushers are well known to those skilled in the art. They are generally made of relatively ductile cast iron in which inserts are included in extremely wear-resistant materials, generally chrome cast iron, sometimes including ceramic grains, in order to reinforce the surfaces most stressed during grinding.
  • EP 1570905A1 discloses a grinding roller comprising several peripheral inserts made of material with high wear resistance and high hardness, mechanically sealed in a die cast in ductile material with first zones subjected to high wear stress as well as second zones subjected to low wear stress.
  • the roller In the first zone, the roller has on its peripheral face inserts comprising a contiguous part, and in the second zone, a non-contiguous part.
  • WO 9605005 discloses a bimetallic casting mounted on the hub of a vertical axis crusher roller. It comprises a core made of ductile cast iron provided with mechanical connecting elements in the form of studs which are made integral by casting an envelope, made of a non-ductile wear material with a high chromium content.
  • WO 2015/162047A1 discloses a grinding roller with high massivity inserts embedded in a metal matrix composed of ductile iron and steel, the roller comprising inserts with a VIS massivity module of between 3 and 5 cm.
  • WO 2015/015507 A1 discloses a grinding roller for a vertical axis crusher, aimed at solving the problem of wear and life of the roller.
  • the roller includes a body with an inner periphery and an outer periphery, and at least one insert that is disposed inside the body such that it is located close to the inner periphery and away from the outer periphery.
  • the present invention proposes a roller reinforced by inserts whose profile benefits from a particular design which causes constant wear of the entire working surface of the roller while avoiding local punctual wear. These rollers make it possible to maintain the performance of the crusher at a satisfactory level for longer while minimizing the risk of breakage and reducing manufacturing costs.
  • Vertical axis crushers are known to those skilled in the art. There are different types and they generally include a table rotating around a vertical axis onto which material to be ground is fed.
  • the crusher is equipped with a plurality of very heavy wheels of generally cylindrical or frustoconical shape, called “rollers”, which are positioned above the table.
  • rollerers When the table rotates, the material to be ground is driven outwards by centrifugal force and passes between the rollers and the table.
  • the own weight and a vertical force applied to the rollers cause the compaction and crushing of the bed of material passing below the rollers.
  • This material itself serves as a frictional connection between the table and the rollers, which means that the rotation of the table causes the rotation of the rollers or vice versa. Grinding in the material bed is done by compression and shearing of the material.
  • Compressive stresses and relative speeds between the rollers and the table vary over the width (thickness) of the roller.
  • the level of compressive stress depends on the height of the material bed and the spacing between the rollers and the table over the width of the roller.
  • the level of wear is not constant over the width of the roller. Over time, more marked areas of wear form along the generator of the rollers which cause a drop in grinding efficiency and ultimately require the replacement of the rollers.
  • This drop in yield can be explained by the very operation of a vertical crusher.
  • this stop is adjusted to ensure a safety space of approximately 10 mm between the table and the working surface of the grinding roller.
  • the intensity of wear on a roller of a vertical axis crusher depends mainly on the abrasiveness of the material, the pressure applied locally and the relative speed between the surface of the roller and the material to be crushed. As the mill rotates, material builds up outside the turntable, causing much greater wear and tear on the outer part of the grinding roller working surface (see Figure 3 ). This is why this part must be particularly reinforced with inserts.
  • the invention discloses grinding rollers whose metal matrix is a relatively ductile material such as GS cast iron or mild steel. These rollers are provided with a plurality of high wear-resistant inserts distributed over the entire periphery near the working surface of the roller (see figure 2 ).
  • the originality of the grinding roller according to the present invention lies in the design of the inserts which are profiled in such a way that part of them is in the immediate vicinity, or even flush with the work surface (in the state new of the roller) in places of heavy stress, and another part set back from the work surface (when the roller is new) in areas of less stress.
  • This original distribution of reinforcement ensures more constant wear across the entire width of the working surface of the grinding roller.
  • the distance between the portion of the insert close to the work surface and the work surface itself in the high stress zone (Z1) is defined by d1.
  • the distance between the portion of the insert set back from the work surface and the work surface itself in the low-stress zone (Z2) is defined by d2, the distance d1 in the high-stress zone (Z1) always being less than d2 in the low demand zone (Z2).
  • d1 0 or is close to zero.
  • the notion “flush with the working surface” must however be put into perspective knowing that the size of the grinding rollers, the diameter of which is sometimes around three meters for a mass of 15 tonnes.
  • the distance d1 is generally less than 10 mm, preferably 8 mm, or even 5 mm or less depending on the practical conditions of casting.
  • the portion of the outer surface of the insert which is set back from the working surface of the grinding roller is at a distance d2 generally greater than 10mm, preferably greater than 15mm and particularly preferably greater than 20mm.
  • the inserts will often have a transition zone (Z3) joining the portions close to and those set back from the work surface. These portions correspond to a zone (Z3) where the external surface of the insert gradually moves away from the working surface of the roller when new.
  • the ductile material filling the volume between the exterior surface of the inserts and the original surface of the roller therefore has a variable thickness over the thickness of the roller.
  • transition zone Z3 The presence of a transition zone Z3 is however not always necessary and in certain cases, the zone of high wear stress Z1 can pass without transition to a zone of low wear stress Z2 (see Figure 7 ).
  • the roller will therefore have two zones over its working width, zone 1 (Z1) being subjected to strong stress where the exterior surface of the insert will be closest to or flush with the surface of the insert. working surface (original profile) of the roller, zone 2 (Z2) being subjected to low stress where the exterior surface of the insert will be furthest away and set back from the working surface (original profile) of the roller (peripheral surface).
  • the rollers will nevertheless often include a transition zone 3 (Z3) corresponding to an average stress intensity where the distances d1 and d2 meet.
  • zones Z1 and Z2 the distances d1 and d2 are not necessarily completely constant but can vary slightly depending on the difficulties encountered in placing the inserts in the molds during the preparation of the casting.
  • the invention aims to accelerate wear in zones 2 and possibly 3, which has the consequence that the wear gradient between zone 1 and the rest of the The thickness of the roller is less.
  • the rollers can thus keep a profile closer to the original profile and therefore have a longer lifespan.
  • the increase in lifespan observed is between 10 and 80%, preferably between 30 and 70%. The most noticeable improvements were observed on the frustoconical roller models.
  • Grinding rollers which have axial symmetry with a generator of revolution giving rise to a “cylinder” or “tire” type roller (see Figure 4 ) can be used on both external peripheral faces and can be turned over (for example, the rollers for RM type crushers).
  • the inserts may contain ceramic grains (oxides, carbides, metal nitrides or borides, intermetallic compounds) in order to improve their resistance to wear.
  • these grains will be arranged in the part of the insert which is closest to the (original) peripheral surface of the roller in zone Z1.
  • the arrangement of the ceramic grains is preferably in the form of a wafer which can be infiltrated by the melting of the casting. The wafers are preformed to a desired section and placed in the mold before casting.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Claims (9)

  1. Zerkleinerungsrolle (1) für Zerkleinerer mit vertikaler Achse, welche durch Gießen einer metallischen Matrix in einer Gießerei hergestellt wird, wobei die Rolle (1) an ihrem Umfang eine Vielzahl von Verstärkungseinsätzen (2) umfasst, wobei bestimmte Abschnitte der Umfangsfläche eines gleichen Einsatzes sich je nach Verschleißbeanspruchungen in einem Abstand d1 oder d2 zur Arbeitsfläche (3) befinden, wobei die Rolle Folgendes umfasst:
    - mindestens einen Bereich mit starker Verschleißbeanspruchung Z1, wobei mindestens ein Abschnitt des Einsatzes (2) in einem Abstand d1 in der Nähe der Arbeitsfläche (3) der Rolle positioniert ist;
    - einen Bereich mit schwacher Verschleißbeanspruchung Z2, wobei ein Abschnitt des Einsatzes in einem Abstand d2 positioniert ist, der gegenüber der Arbeitsfläche (3) der Rolle zurückversetzt ist, wobei d1 < d2.
  2. Rolle (1) nach Anspruch 1, dadurch gekennzeichnet, dass sie mindestens einen Zwischenbereich Z3 umfasst, welcher die Bereiche Z1 und Z2 verbindet.
  3. Rolle (1) nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass d1 kleiner als 10 mm, vorzugsweise kleiner als 5 mm ist, und d2 größer als oder gleich 10 mm, vorzugsweise größer als 20 mm ist.
  4. Rolle (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass d1 = 0.
  5. Rolle (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie zwei Bereiche mit starker Beanspruchung Z1 umfasst, die sich bei einer Rolle mit symmetrischer Benutzung auf beiden Seiten eines Bereiches mit schwacher Beanspruchung Z2 befindet.
  6. Rolle (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Einsätze (2) auf der Fläche, die hin zur Arbeitsfläche (3) gerichtet ist, keramische Verstärkungen umfassen.
  7. Rolle (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Einsätze (2) bis zu 60 Vol.-% Keramikkörner umfassen.
  8. Rolle (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Keramikkörner Aluminiumoxid, Zirkonoxid, Aluminiumoxid-Zirkonoxid und/oder Metallcarbide umfassen.
  9. Rolle (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Rolle eine Kegelstumpfform aufweist.
EP17768810.8A 2016-10-12 2017-09-20 Zerkleinerungsrolle Active EP3525934B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP16193517.6A EP3308861A1 (de) 2016-10-12 2016-10-12 Zerkleinerungsrolle
PCT/EP2017/073701 WO2018069006A1 (fr) 2016-10-12 2017-09-20 Galet de broyage

Publications (2)

Publication Number Publication Date
EP3525934A1 EP3525934A1 (de) 2019-08-21
EP3525934B1 true EP3525934B1 (de) 2023-10-25

Family

ID=57130280

Family Applications (2)

Application Number Title Priority Date Filing Date
EP16193517.6A Withdrawn EP3308861A1 (de) 2016-10-12 2016-10-12 Zerkleinerungsrolle
EP17768810.8A Active EP3525934B1 (de) 2016-10-12 2017-09-20 Zerkleinerungsrolle

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP16193517.6A Withdrawn EP3308861A1 (de) 2016-10-12 2016-10-12 Zerkleinerungsrolle

Country Status (17)

Country Link
US (1) US11123742B2 (de)
EP (2) EP3308861A1 (de)
JP (1) JP6931387B2 (de)
KR (1) KR20190065283A (de)
CN (1) CN109843442B (de)
AU (1) AU2017342978B2 (de)
BR (1) BR112019006614A2 (de)
CA (1) CA3036461A1 (de)
CL (1) CL2019000786A1 (de)
DK (1) DK3525934T3 (de)
ES (1) ES2965916T3 (de)
MX (1) MX2019004261A (de)
PL (1) PL3525934T3 (de)
PT (1) PT3525934T (de)
RU (1) RU2730026C1 (de)
WO (1) WO2018069006A1 (de)
ZA (1) ZA201901867B (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1027444B1 (fr) 2020-02-11 2021-02-10 Magotteaux Int Piece d'usure composite
JP2024067390A (ja) * 2022-11-04 2024-05-17 三菱重工業株式会社 粉砕ローラ、粉砕テーブル及び固体燃料粉砕装置並びに粉砕ローラの製造方法
JP2024067391A (ja) * 2022-11-04 2024-05-17 三菱重工業株式会社 粉砕ローラ、粉砕テーブル及び固体燃料粉砕装置並びに粉砕ローラの製造方法

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4579289A (en) * 1983-11-07 1986-04-01 Eschweiler Bergwerks-Verein Aktiengesellschaft Skew roller for a planetary type skew rolling mill
US4606506A (en) * 1984-05-04 1986-08-19 Kawasaki Jukogyo Kabushiki Kaisha Vertical type roller mill
JPS63143949A (ja) * 1986-12-09 1988-06-16 アイエヌジ商事株式会社 粉砕機に使用される破砕面部材
US5238046A (en) * 1990-09-20 1993-08-24 Magotteaux International Method of manufacturing a bimetal casting and wearing part produced by this method
BE1008577A6 (fr) 1994-08-17 1996-06-04 Magotteaux Int Piece de fonderie bimetallique servant de piece d'usure dans les broyeurs verticaux et leur procede de fabrication.
PT930948E (pt) * 1996-10-01 2001-01-31 Magotteaux Int Peca de desgaste composita
JP2003225578A (ja) * 2002-02-01 2003-08-12 E & A:Kk 粉砕装置の破砕歯
JP3807734B2 (ja) * 2002-08-09 2006-08-09 アイエヌジ商事株式会社 破砕面部材
EP1570905A1 (de) * 2004-03-03 2005-09-07 Magotteaux International S.A. Mahlwerkzeug für Walzenmühle
JP2009183877A (ja) * 2008-02-06 2009-08-20 Ube Techno Enji Kk 竪型粉砕機の粉砕ローラ
JP2012035157A (ja) * 2010-08-04 2012-02-23 Ube Techno Enji Kk 粉砕ローラ
US20140217212A1 (en) * 2011-09-09 2014-08-07 Bühler AG Roll
ES2686366T3 (es) * 2013-04-11 2018-10-17 Fujico Co., Ltd. Método y dispositivo para producir un cilindro de laminación
WO2015015507A1 (en) * 2013-07-30 2015-02-05 Balaji Industrial Products Ltd., A grinding roller for vertical roller mill and method of manufacturing the same
BE1021839B1 (fr) 2014-04-23 2016-01-21 Magotteaux International S.A. Galet de broyage comportant des inserts a massivite elevee
CN104549654B (zh) * 2015-01-12 2017-05-10 溧阳中材重型机器有限公司 立磨磨辊辊套与磨盘衬板之间的耐磨装置
CN205020152U (zh) * 2015-09-10 2016-02-10 中材（天津）粉体技术装备有限公司 立式辊磨磨辊和立式辊磨

Also Published As

Publication number Publication date
CL2019000786A1 (es) 2019-07-26
MX2019004261A (es) 2019-06-12
AU2017342978A1 (en) 2019-04-18
BR112019006614A2 (pt) 2019-07-02
US11123742B2 (en) 2021-09-21
PT3525934T (pt) 2023-12-18
DK3525934T3 (da) 2024-01-29
WO2018069006A1 (fr) 2018-04-19
JP2019531888A (ja) 2019-11-07
JP6931387B2 (ja) 2021-09-01
KR20190065283A (ko) 2019-06-11
EP3525934A1 (de) 2019-08-21
US20200055055A1 (en) 2020-02-20
CN109843442B (zh) 2021-10-15
RU2730026C1 (ru) 2020-08-14
EP3308861A1 (de) 2018-04-18
CN109843442A (zh) 2019-06-04
ZA201901867B (en) 2020-09-30
PL3525934T3 (pl) 2024-04-08
AU2017342978B2 (en) 2022-09-15
ES2965916T3 (es) 2024-04-17
CA3036461A1 (en) 2018-04-19

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