EP3171980B1 - A roller with a segmented wear surface for crushing particulate material - Google Patents

A roller with a segmented wear surface for crushing particulate material Download PDF

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Publication number
EP3171980B1
EP3171980B1 EP15741494.7A EP15741494A EP3171980B1 EP 3171980 B1 EP3171980 B1 EP 3171980B1 EP 15741494 A EP15741494 A EP 15741494A EP 3171980 B1 EP3171980 B1 EP 3171980B1
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EP
European Patent Office
Prior art keywords
wear
roller
segments
guiding means
roller body
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.)
Active
Application number
EP15741494.7A
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German (de)
English (en)
French (fr)
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EP3171980A1 (en
Inventor
Niels Ole Cedergaard
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.)
FLSmidth AS
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FLSmidth AS
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Filing date
Publication date
Application filed by FLSmidth AS filed Critical FLSmidth AS
Publication of EP3171980A1 publication Critical patent/EP3171980A1/en
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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
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/30—Shape or construction of rollers
    • B02C4/305—Wear resistant rollers

Definitions

  • the present invention relates to a roller for the crushing of particulate material, such as crude ore for use in the cement or minerals industries, by which a roller body is provided with a plurality of individual wear segments which are arranged on longitudinal guiding means and between clamps such that two or more of the wear segments are fixed to the same lateral section of one lateral portion of the roller body in a manner such that the frequency of, and cost associated with, the replacement of such wear segments is minimized.
  • the invention also relates to the plurality of individual wear segments and to a method of manufacturing the roller.
  • the roller may for example be used in a vertical roller mill, in a high-pressure grinding roller press, or in similar equipment for crushing of particulate material.
  • grinding rollers without wear segments were required to be replaced every three to eight months (depending on the tip speed of the grinding rollers) because of excessive wear due to the impact of the grinding media and particulate against the rollers within the housing.
  • Such a replacement process was (and is) time consuming. For example, it can take four to six hours or more to replace grinding rollers in a grinding mill, and a full change-out of all grinding rollers (albeit, seldom necessary) takes approximately sixteen hours or more.
  • These time-consuming repair processes if performed too often, may result in losses such as superfluous operational downtime, increased labor costs, and reduced throughput. If the repair process is performed too infrequently, other expensive losses such as shaft failure, inefficient grinding, and/or further degradation of intact grinding rollers or mill components may be incurred.
  • grinding rollers were typically very costly. For example, when an exotic high end wear surface was implemented, the entire roller was required to be fabricated out of the exotic high-end material.
  • segmented crushing rollers were implemented. Such segmented crushing rollers also allowed for intermittent use of exotic high end wear segments (i.e. - using an exotic high end wear segment in one wear segment and not another).
  • Examples of patents/applications that describe rollers having the outer circumference of the roller body covered with segmented wear segments are found in, for example, EP 2703085 , DE 197 09 263 A1 , US 5,253,816 and US 5,860,609 . In each of the foregoing patents/applications the rollers are arranged laterally on the roller body (i.e.
  • the wear segments are arranged laterally on the circumference of the grinding roller so that a wear segment spans an entire lateral portion of the grinding roller).
  • the foregoing design is not advantageous because it still results in a time-consuming repair process and may result in losses such as superfluous operational downtime, increased labor and material costs, and reduced throughput.
  • the non-uniform wear will also result in non-optimal production and an increase in energy.
  • a new type of crushing roller, and wear segments therefor are needed in order to reduce costs and time associated with the frequent repair and/or replacement of premature segmented discs.
  • a new type of crushing roller, and wear segments therefor are needed in order to maintain a uniform wear across the full width of roller segments (in the lateral direction).
  • such new type of crushing rollers will allow for easy replacement or refurbishment when the outer half of wear segments (i.e. - the wear segments which are typically the most worn) need replacement and will provide for uniform wear in order to achieve and maintain optimum production and minimize the loss of energy throughout the life of the wear segments.
  • a roller for crushing particulate material comprises a roller body 2 having a center axis 3, a plurality of wear segments 4, 5, having crushing surfaces that are fixed to said roller body 2; a plurality of clamps 7, 8 disposed on the sides of said roller body 2; said roller is characterized in a guiding means 6 disposed on said roller body 2 between said clamps 7, 8; wherein said guiding means 6 run longitudinally about the circumference of said roller body, and wherein said wear segments 4, 5 are arranged on said guiding means 6 such that two or more of said wear segments are fixed to the same lateral section of one lateral portion of said roller body.
  • the plurality of wear segments 4, 5 can include grooves 11 and knobs 12, the grooves 11 and knobs 12 cooperating with the guiding means 6 to fix the plurality of wear segments 4, 5 to the roller body 2.
  • the roller 1 can also comprise a plurality of keys 10, the plurality of keys 10 being fixed to the roller body 2.
  • the plurality of wear segments 4, 5 can also be comprised of keyways 13, the keyways 13 cooperating with the plurality of keys 10 to prevent the plurality of wear segments 4, 5 from moving in the longitudinal direction.
  • the plurality of wear segments 4, 5 can also include projections 14, 15.
  • a wear segment 4 is provided for arrangement on longitudinal guiding means 6 of a roller for crushing particulate material, said wear segmentcomprises a groove 11 and a knob 12, wherein said groove 11 is configured to accept a longitudinal guiding means 6 and wherein said knob 12 is configured to extend at least partially over a portion of said guiding means 6, said wear segment further comprises a plurality of keyways 13, said keyways 13 cooperating with keys 10 on a roller body to prevent said wear segment 4 from moving in the longitudinal direction.
  • the wear segment 4 can also include projections 14, 15 disposed on the knobs 12 of the longitudinal side of the wear segments 4, 5 that face the longitudinal guiding means 6
  • a method for manufacturing a roller 1 for crushing particulate material is also provided.
  • the method comprises the steps of: affixing a plurality of wear segments 4, 5 to a roller body 2 having a center axis 3 by arranging said wear segments 4, 5 on longitudinal guiding means 6 and disposing said wear segments 4, 5 between a plurality of clamps 7, 8 such that two or more of said wear segments are fixed to the same lateral section of one lateral portion of said roller body; and tightening at least one of said plurality of clamps 7, 8 so that a first longitudinal side of wear segment 4 abuts guiding means 6 and a first longitudinal side of wear segment 5; a second longitudinal side of wear segment 4 abuts plurality of clamps 7 and a second longitudinal side of wear segment 5 abuts plurality of clamps 8.
  • the method may also include additional steps as further described herein.
  • a roller 1 for crushing particulate material has a roller body 2 which has a center axis 3 extending laterally through the center shaft of the roller body 2.
  • the outer circumference of the roller body 2 is provided with a plurality of individual wear segments 4, 5; the plurality of wear segments 4, 5 having crushing surfaces.
  • the plurality of wear segments 4, 5 may have different crushing surfaces.
  • wear segment 5 can be made of an exotic, high end wear surface, for example a ceramic or another hard cast or forged material, without limitation; and wear segment 4 can be made of a traditional wear surface (for example, cast iron, austempered ductile iron, carbidic austempered ductile iron or polyurethane).
  • the crushing surface of the wear segments 4, 5 may be PTA, hard-faced, sintered, hipped or may have studs (made of for example, tungsten carbide) embedded therein to increase the service life of the plurality of wear segments 4, 5.
  • the plurality of wear segments 4, 5 are fixed to the roller body 2.
  • the roller has a plurality of clamps 7, 8 which are disposed on the longitudinal (i.e. - when the roller 1 is viewed in an orientation where the center axis 3 runs laterally through the center shaft of said roller body 2) sides of the roller body 2.
  • the roller 1 has guiding means 6 disposed on the roller body 2 between the plurality of clamps 7, 8 which are disposed on the longitudinal sides of the roller body 2.
  • Guiding means 6 run longitudinally (i.e. - when the roller 1 is viewed in an orientation where the center axis 3 runs laterally through the center shaft of said roller body 2) (also referred to herein as “longitudinal guiding means” or simply “guiding means”) about the circumference of the roller body 2.
  • the guiding means 6 is substantially parallel to plurality of clamps 7 and plurality of clamps 8.
  • the position of longitudinal guiding means 6 is determined by the regular wear pattern for a particular grinding roller application.
  • the wear pattern of a grinding roller application shows that wear is greater on the left longitudinal 2/3 of the grinding roller
  • guiding means 6 may be disposed 2/3 from the left longitudinal side of the grinding roller.
  • Such orientation allows for placement of high end exotic wear segments to be placed in the area where wear is the greatest and for utilization of a conventional wear segments in the remaining 1/3.
  • Such an arrangement allows for a uniform wear profile.
  • the guiding means 6 is a single uniform piece. In other embodiments the guiding means 6 are multiple pieces. Guiding means 6 are typically wedge shaped but can also be substantially rectangular in shape. Guiding means 6 may be composed of a high strength or low alloy steel, for example CrMo, without limitation.
  • the guiding means 6 is floating (i.e. - it is not affixed to the roller body 2 by a fastening means).
  • the guiding means 6 are fixed to the roller body 2 by a fastening means 9, in this case, for example, radially located screws.
  • the roller body 2 may have two or more guiding means 6 which are disposed on the roller body 2 between the plurality of clamps 7, 8 which are disposed on the longitudinal sides of the roller body 2.
  • Each of the two or more guiding means 6 run longitudinally (i.e. - when the roller 1 is viewed in an orientation where the center axis 3 runs laterally through the center shaft of said roller body 2) about the circumference of the roller body 2.
  • the position of the division of the two or more guiding means 6 is determined by the regular wear pattern for the grinding roller application.
  • one of said plurality of clamps 7 is fixed and another of said plurality of clamps 8 is movable.
  • the plurality of wear segments 4, 5 are arranged on longitudinal guiding means 6.
  • three or more longitudinal wear segments 4, 5 can be laterally aligned, meaning that the three or more longitudinal wear segments may be fixed to the same lateral section of one lateral portion of the roller body 2.
  • the three or more wear segments can have different wear surfaces. Because of the longitudinal guiding means 6, the wear segments 4, 5 can be smaller and lower in weight, as opposed to if the guiding means was to run laterally. Additionally, by arranging the wear segments 4, 5 on a longitudinal guiding means 6, a longitudinal half of the wear segment (i.e. - 5) can be replaced without replacing its corresponding longitudinal half of wear segment (i.e. - 4).
  • This arrangement is advantageous because wear profiles of certain grinding mills have shown that one longitudinal side of the roller surface wears more heavily than the other side.
  • Such an arrangement allows the reduction of the initial costs associated with wear parts (i.e. - allowing for exotic wear parts to be used on only one longitudinal half) and allows for the amount of scrapped material to be reduced when repair is necessary.
  • Such an arrangement promotes uniform wear across lateral subsections of the roller allowing for more efficient grinding and lower energy consumption. This arrangement also translates to less operational downtime, decreased labor costs and increased throughput.
  • a wear segment 4 is arranged adjacent to the wear segment 5 so that when the roller body 2 is viewed so that the roller 1 is in an orientation so that the center axis 3 extends laterally through the center shaft of the roller body 2, a first long side of a wear segment 4 abuts a first long side of the wear segment 5, a second long side of the wear segment 4 abuts a clamp 7 and the second long side of the wear segment 5 abuts a clamp 8.
  • the plurality of wear segments 4, 5 have grooves 11 and knobs 12.
  • the grooves 11 and knobs 12 cooperate with longitudinal guiding means 6 in order to fix the plurality of wear segments 4, 5 to the roller body 2.
  • the knob 12 of a wear segment 5 abuts the knob 12 of a wear segment 4 and the longitudinal guiding means 6 extends into the grooves 11 of wear segment 5 and wear segment 4.
  • keys 10 may be disposed on the roller body 2. Keys 10 are configured to prevent longitudinal shifting of the wear segments 4, 5.
  • the wear segments 4, 5 have keyways 13, wherein the keys 10 interlock with the keyways 13 to further prevent the longitudinal shift of the wear segments 4, 5.
  • shearing pins 16 may be disposed on the roller body 2. Shearing pins 16 are configured to prevent shifting of the wear segments 4, 5.
  • the wear segments 4, 5 have pin holes 17, wherein the shearing pins 16 interlock with the pin holes 17 to further prevent the shift of the wear segments 4, 5.
  • the wear segments 4, 5 have mating male projections 14 and/or female projections 15. The projections 14, 15 are disposed on the knobs 12 of the longitudinal side of the wear segments 4, 5 that face the longitudinal guiding means 6.
  • the wear segments 4, 5 are arranged on longitudinal guiding means 6.
  • the plurality of wear segments 4, 5 are fixed to the roller body 2 by the plurality of clamps 7, 8.
  • Fasteners such as the axially arranged screw connections tighten the clamps 7, 8 and fix the wear segments 4, 5 to the roller body 2.
  • a normal force is applied to the wear segments 4, 5 and guiding means 6, the wear segments are forced against the guiding means 6 and the clamps 7, 8 and the guiding means 6 are tensioned whereby such tension and force stop the wear segments 4, 5 from further movement in the lateral direction.
  • the wear segments 4, 5 have mating male projections 14 and/or female projections 15 the tension and force also act to interlock the projections 14, 15 and stop the wear segments from further movement in the longitudinal direction.
  • the guiding means 6 acts like an internal floating clamp.
  • the wear segments 4, 5 may contain knotches disposed on the longitudinal side of the wear segments 4, 5 that face the clamps 7, 8. The knotches cooperate with the clamps 7, 8 to create a tight fit and to further secure the plurality of wear segments 4, 5 to the roller body 2.
  • a method for manufacturing a roller 1 according to the invention is also disclosed.
  • wear segments 4, 5 are arranged on a roller body 2 on longitudinal guiding means 6 and between a plurality of clamps 7, 8.
  • the plurality of clamps 7, 8 are tightened forcing a first longitudinal side of a wear segment 4 to abut guiding means 6 and a first longitudinal side of wear segment 5; a second longitudinal side of wear segment 4 to abut the plurality of clamps 7 and a second longitudinal side of wear segment 5 to abut plurality of clamps 8.
  • keys 10 are fixed on the roller body and wear segments 4, 5 with keyways 13 are arranged on a roller body 2 on longitudinal guiding means 6 and between a plurality of clamps 7, 8.
  • the plurality of clamps 7, 8 are tightened forcing a first longitudinal side of a wear segment 4 to abut guiding means 6 and a first longitudinal side of wear segment 5; a second longitudinal side of wear segment 4 to abut the plurality of clamps 7 and a second longitudinal side of wear segment 5 to abut plurality of clamps 8.
  • the wear segments 4, 5 have mating male projections 14 and/or female projections 15 the tightening interlocks the projections 14, 15 of a plurality of wear segments 4, 5.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
EP15741494.7A 2014-07-25 2015-07-22 A roller with a segmented wear surface for crushing particulate material Active EP3171980B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA201470463 2014-07-25
PCT/DK2015/050224 WO2016012028A1 (en) 2014-07-25 2015-07-22 A roller with a segmented wear surface for crushing particulate material

Publications (2)

Publication Number Publication Date
EP3171980A1 EP3171980A1 (en) 2017-05-31
EP3171980B1 true EP3171980B1 (en) 2018-08-29

Family

ID=53719591

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15741494.7A Active EP3171980B1 (en) 2014-07-25 2015-07-22 A roller with a segmented wear surface for crushing particulate material

Country Status (3)

Country Link
EP (1) EP3171980B1 (zh)
CN (1) CN106573246B (zh)
WO (1) WO2016012028A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107020179A (zh) * 2017-05-29 2017-08-08 肇庆市思睿力机器人科技有限公司 一种改良矿石破碎机用辊齿
CN111570013B (zh) * 2020-05-28 2022-05-24 中钢天源股份有限公司 一种镶嵌硬质合金柱钉的辊压机辊子结构
CN112871274B (zh) * 2020-12-22 2022-06-17 周文兵 一种破碎机对辊及工业石料破碎机

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5253816A (en) * 1989-07-20 1993-10-19 Krupp Polysius Ag Material crushing roller construction
DE19638237A1 (de) 1996-09-19 1998-03-26 Deutz Ag Verschleißfeste Oberflächenpanzerung für die Walzen von Hochdruck-Walzenpressen zur Druckzerkleinerung körnigen Gutes
DE19709263A1 (de) 1997-03-06 1998-09-10 Krupp Polysius Ag Walze
DE102007032261A1 (de) * 2007-07-11 2009-01-15 Khd Humboldt Wedag Gmbh Walze für eine Hochdruckwalzenpresse insbesondere zur Gutbettzerkleinerung körnigen Gutes
CA2828054A1 (en) * 2011-02-23 2012-08-30 Flsmidth A/S Crushing roller
JP5782986B2 (ja) * 2011-10-21 2015-09-24 三菱マテリアル株式会社 破砕装置及び破砕物製造方法
CN202516605U (zh) * 2011-12-23 2012-11-07 黑龙江昱泰重型机器制造有限公司 一种多段组合式齿辊
EP2703085A1 (en) * 2012-08-29 2014-03-05 Metso Brasil Industria e Comercio Ltda Roll for a roller grinder, and roller grinder comprising such roll
CN203448136U (zh) * 2013-08-30 2014-02-26 绵阳金鼎机电技术有限公司 一种高精度、易整体拆装耐磨齿辊
CN203508084U (zh) * 2013-09-18 2014-04-02 四川旭虹光电科技有限公司 圆角压辊

Also Published As

Publication number Publication date
CN106573246B (zh) 2020-03-03
WO2016012028A1 (en) 2016-01-28
CN106573246A (zh) 2017-04-19
EP3171980A1 (en) 2017-05-31

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