WO2020143997A1 - Cylindre broyeur comprenant des éléments de bordure - Google Patents

Cylindre broyeur comprenant des éléments de bordure Download PDF

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Publication number
WO2020143997A1
WO2020143997A1 PCT/EP2019/085142 EP2019085142W WO2020143997A1 WO 2020143997 A1 WO2020143997 A1 WO 2020143997A1 EP 2019085142 W EP2019085142 W EP 2019085142W WO 2020143997 A1 WO2020143997 A1 WO 2020143997A1
Authority
WO
WIPO (PCT)
Prior art keywords
roller
grinding
base body
grinding roller
edge element
Prior art date
Application number
PCT/EP2019/085142
Other languages
German (de)
English (en)
Inventor
Frank Schroers
Silvio Lorenz
Bernhard Peterwerth
Christoph Schimming
Daniel AUSTRUP
Cesar Augusto Fontanezi Rodrigues
Original Assignee
Thyssenkrupp Industrial Solutions Ag
Thyssenkrupp Ag
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 Thyssenkrupp Industrial Solutions Ag, Thyssenkrupp Ag filed Critical Thyssenkrupp Industrial Solutions Ag
Publication of WO2020143997A1 publication Critical patent/WO2020143997A1/fr

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
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/30—Shape or construction of rollers
    • 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 invention relates to a grinding roller of a roller mill with edge elements for comminuting granular material.
  • Roller mills are usually used for crushing regrind, such as limestone, clinker or similar rocks.
  • regrind such as limestone, clinker or similar rocks.
  • edge elements For controlled influencing of the lateral flow of regrind from a grinding gap formed between the grinding rollers of a roller mill, it is known to arrange edge elements on one of the grinding rollers.
  • Such a roller mill with edge elements is known for example from DE 20 2014 006 837 U1.
  • An increased specific grinding pressure acts on the edge elements, which leads to a heavy load on the edge elements.
  • the connection of the edge elements is accordingly a critical point and a potential weak point.
  • a grinding roller of a roller mill comprises a roller shaft and a roller base body attached around the roller shaft, wherein the roller base body of the grinding roller comprises at least one end region an edge element which extends in the radial direction of the grinding roller.
  • the edge element is formed in one piece with the roller base body.
  • the grinding roller preferably has two edge elements, each of which is arranged on an end region of the grinding roller, in particular of the roller base, and is formed in one piece with the roller base.
  • the edge elements each form an end face of the grinding roller.
  • the edge element is preferably a closed circular ring, which is preferably attached coaxially to the roller shaft.
  • edge element is formed in one piece with the roller base body means that the roller base body is designed as a monoblock which comprises at least one edge element.
  • the roller base body has a radially outwardly facing grinding surface, which preferably has a plurality of, in particular pin-shaped, wear elements, which are each fitted in recesses in the grinding surface.
  • the grinding surface is arranged between the two end regions of the roller body.
  • the at least one edge element extends in the radial direction of the grinding roller beyond the grinding surface.
  • the roller shaft preferably extends axially through the grinding roller and serves to rotationally drive the grinding roller about its central axis.
  • the roller shaft is preferably connected to a drive device, such as a motor, so that it drives the roller shaft.
  • the roller base body is in particular arranged coaxially with the roller shaft around it.
  • the basic roller body is hollow-cylindrical and in particular is attached directly to the roller shaft, in particular shrunk onto it. It is also conceivable that at least one preferably hollow-cylindrical intermediate element is arranged between the roller shaft and the roller base body, which is fastened directly to the roller shaft, preferably shrunk onto it.
  • the grinding rollers rotate in opposite directions to one another, the material to be ground being comminuted within the grinding gap formed between the two grinding rollers.
  • a material layer is usually formed on the grinding surface of the respective grinding roller and provides an autogenous wear protection of the grinding surface.
  • this autogenous wear protection layer can be thicker at the end regions of the roller ends, in particular of the roller base body, which are provided with edge elements, than at the other regions of the grinding rollers. This leads to an increased grinding pressure at the end regions of the roller base body, through which the edge elements are subjected to greater loads and fail more frequently. Edge elements formed in one piece with the roller base body have the advantage that they fail less quickly and withstand a high grinding pressure.
  • the omission of, for example, highly stressed and thus critical connecting elements, such as screws, between the edge elements and the roller base body enables the one-piece design of the edge elements with the roller base body to withstand higher forces with similar external dimensions.
  • the production of the roller base body with the edge elements is relatively simple, it being possible to dispense with a complex assembly of the edge elements on the end regions of the grinding roller, in particular of the roller base body.
  • the risk of failure of the edge elements is minimized by forming the edge elements in one piece with the roller base body.
  • the one-piece design prevents vibrations of the grinding roller.
  • the roller base body with the edge element is produced by forging, casting or machining. These manufacturing methods represent a cost-effective way of integrally forming the edge elements with the roller body.
  • the roller base body has a circumferential groove which is arranged circumferentially at one end of the roller base body.
  • the roller base body preferably has two circumferential grooves, which are each provided on an end region of the roller base body.
  • the groove is special Open in the radial direction to the outside and has a depth of about 10 mm to 150 mm and a width of about 10 mm to 100 mm.
  • the groove provides a holder for wear protection to protect the edges of the grinding roller against wear and ensures simple attachment of the wear protection, for example wear protection plates within the groove.
  • the groove adjoins the edge element.
  • a groove adjoins each edge element, which lies against the surface of the edge element facing inwards in the direction of the grinding surface.
  • wear protection is attached to the edge element, wherein the wear protection according to a further embodiment comprises a plurality of wear protection elements which are, for example, plate-shaped.
  • the wear protection elements are preferably made of a hard metal and / or ceramic, in particular tungsten carbide, ceramic, titanium carbide, boron carbide or chromium carbide or a mixture of these materials.
  • the wear protection element is preferably integrally connected to the roller base body, for example by soldering or gluing.
  • the wear protection element can also be positively and / or non-positively connected to the roller base body, for example by means of screws, a tongue and groove connection or a clamp.
  • the wear protection can also include, for example, surfacing.
  • Each edge element preferably has a plurality of wear protection elements, each of which extends, for example, over the inward-facing side surface of the edge element and in particular additionally over the width of the groove and is arranged, for example, side by side to form a ring.
  • the wear protection is attached to the inwardly facing side surface of the edge element.
  • the inner sides of the edge elements are exposed to particularly high wear, so that wear protection elements attached there extend the service life of the roller body considerably.
  • the wear protection is attached, for example, to the radially outward-facing surface of the edge element and, in particular, completely covers this surface of the edge element circumferentially.
  • the wear protection elements are plate-shaped and / or pin-shaped. The wear protection elements preferably all have the same shape, which greatly simplifies the manufacture and attachment of the wear protection elements to the roller base body.
  • the grinding roller has a plurality of wear protection elements which are arranged in the circumferential groove and / or on the inwardly facing side surfaces of the edge element.
  • the arrangement in the circumferential groove arranged on the end regions of the roller base body ensures a particularly stable hold of the wear protection elements.
  • wear of the grinding surface is taken into account with wear protection elements arranged in a groove. This design ensures that the edge elements continue to be protected against wear even when the grinding surface is worn.
  • the wear protection element extends over the groove and, preferably in the radial direction, extends along the inwardly facing side surface of the edge element.
  • the wear protection element has two legs that form an angle of approximately 90 ° to one another and one leg is attached in the groove and the other leg is attached to the edge element.
  • a hollow cylindrical intermediate element is arranged between the roller shaft and the roller base body.
  • the intermediate element is preferably fastened to the roller shaft, in particular by shrinking on.
  • the roller base body is in particular fastened to the intermediate element, in particular shrunk onto it.
  • Such an intermediate element in particular facilitates maintenance of the grinding roller, the upper material layer, preferably the entire roller base body, being removed together with the edge elements, so that only the intermediate element is on the roller shaft. A new roller base is then applied to the intermediate element.
  • the intermediate element can also be part of a roller base body removed in a previous maintenance process, to which a new roller base body has been applied.
  • the invention also encompasses a roller mill for comminuting granular material, comprising a first grinding roller and a second grinding roller, which are arranged opposite one another and can be driven in opposite directions, a grinding gap being formed between the grinding rollers, each grinding roller having a roller shaft and a roller base body attached around the roller shaft and at least one of the grinding rollers is a grinding roller as described above.
  • the edge element is designed such that it extends over the grinding gap and at least partially covers the opposite grinding roller on the end face.
  • each of the grinding rollers is a grinding roller as described above, each edge element being designed in such a way that it extends over the grinding gap and at least partially covers the opposite grinding roller on the end face.
  • An end gap is preferably formed between the edge elements and the end face of the opposing grinding roller.
  • An end-side gap prevents the edge element from colliding with the end region of the respective opposite roller base body in the event of the grinding rollers skewing, the opposing grinding rollers not being arranged parallel to one another.
  • Another advantage of the one-piece design of the roller base body with the edge element is that the end gap can be defined more precisely.
  • the gap is subject to a much greater tolerance, since the manufacturing tolerances of the different parts of the edge elements add up. The smaller the gap, the smaller the bypass made of non-ground material. If the gap is too small, however, the risk of a collision of the edge elements with the opposite roller base body also increases. It is therefore advantageous to be able to set the gap as precisely as possible.
  • the invention also includes a method for setting a grinding roller as described above, wherein the roller base body with the at least one Edge element is produced by forging, casting or machining, so that the roller base body is formed in one piece with the at least one edge element.
  • the advantages described with respect to the grinding roller also apply, in terms of the method, to the method for producing such a grinding roller.
  • Fig. 1 shows a schematic representation of a roller mill with two grinding rollers, one having edge elements, in a plan view according to an embodiment.
  • Fig. 2 shows a schematic representation of a roller mill with two grinding rollers with edge elements in a plan view according to another embodiment.
  • FIG. 3 shows a schematic illustration of a grinding roller with edge elements in a perspective view and a top view according to an exemplary embodiment.
  • Fig. 4 shows a schematic representation of a grinding roller with edge elements in a perspective view and a plan view according to another
  • Fig. 5 shows a schematic representation of a grinding roller with edge elements in a perspective view and a plan view according to another
  • Embodiment. 6 shows a schematic illustration of a roller mill with two grinding rollers, one grinding roller having edge elements, in a sectional view according to a further exemplary embodiment.
  • FIG. 1 shows a roller mill 10 with a first grinding roller 12 and a second grinding roller 14, each of which has an essentially cylindrical roller base 37, 38.
  • the grinding rollers 12, 14 are arranged opposite one another and can be driven in opposite directions.
  • a grinding gap 16 is formed between the grinding rollers 12, 14 and extends in the axial direction.
  • the grinding rollers 12, 14 are, for example, arranged almost parallel or completely parallel to one another, so that the grinding gap 16 extending between the grinding rollers 12, 14 has an almost constant width.
  • Each of the grinding rollers 12, 14 also has a roller shaft 30, 32, which extends along the central axis through the respective roller base 37, 38 and drives the grinding rollers 12, 14 rotating about their central axis.
  • the first and the second grinding rollers 12, 14 have the same diameter, the first grinding roller 12 being, for example, longer than the second grinding roller 14.
  • the roller base bodies 37, 38 each have a first end region 24, 28 and a second end region 22, 26, which are arranged at opposite ends of the roller base body 37, 38.
  • the first end region 24 of the first roller main body 37 is arranged opposite the first end region 28 of the second roller main body 38, the second end region 22 of the first roller main body 37 being arranged opposite the second end region 26 of the second roller main body 38.
  • the first grinding roller 12 has two edge elements 18, 20, which are each attached to an end region of the grinding roller 12, in particular of the roller base body 38.
  • the first edge element 18 is arranged on the first edge region 22 of the first roller base body 38 of the grinding roller 12 and extends in the radial direction beyond the grinding gap 16, so that it partially covers the end face of the second roller base body 37 at the first end region 26.
  • the second edge element 20 is on the second end region 24 of the first roller base body 38 arranged and extends in the radial direction over the grinding gap 16, so that it partially covers the end face of the second roller body 37 of the second end region 28.
  • An end gap 34, 36 is formed between the edge elements 18 and the respective end face of the second roller base 37.
  • FIG. 2 shows a further embodiment of a grinding roller with edge elements 18, 20, the grinding roller essentially corresponding to the grinding roller shown in FIG. 1 with the difference that in the exemplary embodiment in FIG. 2 each of the grinding rollers 12, 14 each has an edge element 18 , 20 has.
  • the first and the second grinding rollers 12, 14 have the same diameter and the same length and are of essentially identical construction.
  • the edge elements 18, 20 are arranged diagonally opposite one another in relation to the end regions 22 - 28 of the roller base bodies 37, 38.
  • the first roller base body 38 has at its first end region 24 an edge element 18 which extends in the radial direction over the grinding gap 16 and partially covers the end face of the second roller base body 37 at the first end region 28.
  • the second roller base body 37 has at its second end region 26 an edge element 20 which extends in the radial direction over the grinding gap 16 and partially covers the end face of the first roller base body 38 at its second edge region 22.
  • the second edge element 20 is arranged with respect to the first edge element 18 on the diagonally opposite end region 26 of the second grinding roller 14.
  • the grinding rollers 12, 14 are arranged offset in the axial direction so that a first end gap 34 is formed between the first edge element 18 and the end face of the second roller base body 38 and a second end gap between the second edge element 20 and the end face of the first roller base body 37 36 is formed.
  • the first and the second end gap 34, 36 each extend in the radial direction.
  • the edge elements 18, 20 each include, for example, a circumferential circular ring.
  • the edge elements 18, 20 are preferably made of a wear-resistant material, such as steel.
  • the edge elements 18, 20 have for example, a thickness of 10 mm to 150 mm, preferably 50 mm to 100 mm, and cover the opposite roller base 37, 38 by about 0-20%, in particular 0.5-10%, preferably 1 -5% of the diameter of the roller base 37, 38.
  • the grinding roller 12 has a roller shaft 30 and a roller base body 38.
  • the roller base body 38 is attached, for example, directly to the roller shaft 30. It is also conceivable that a preferably sleeve-shaped intermediate element is arranged coaxially to the roller shaft 30 between the roller shaft 30 and the roller base body.
  • the roller base body 38 is essentially hollow-cylindrical and is arranged coaxially to the roller shaft 30 around it.
  • the roller base body 38 comprises a central region which is arranged between the two edge elements and has a grinding surface 40. During operation of the grinding roller, the grinding surface 40 comes into contact with the material to be ground in order to comminute it.
  • the roller base body 38 also includes, by way of example, two edge elements 18, 20 which extend beyond the grinding surface 40 in the radial direction of the grinding roller 12.
  • the roller base body 38 is formed in one piece, so that the edge elements 18, 20 and the central region of the roller base body 38 are formed in one piece and result in the roller base body 38.
  • the roller base body 38 is a monoblock and is preferably produced by forging, casting or machining, such as turning or milling.
  • the edge elements 18, 20 extend parallel to one another, preferably exclusively in the radial direction of the grinding roller 12.
  • FIG. 4 shows a grinding roller 12 which essentially corresponds to the grinding roller 12 shown in FIG. 3, the same elements being provided with the same reference numerals.
  • the grinding roller 12 of FIG. 4 has a circumferential groove 42, 44.
  • the grinding roller has a circumferential groove 42, 44 in the roller base body 38 at each end.
  • the groove 42, 44 extends circumferentially around the roller base body 38 and is designed to be open radially to the outside.
  • Each of the two circumferential grooves 42, 44 borders directly on a respective one Edge element 18, 20.
  • each groove 42, 44 has a depth of approximately 10 mm-150 mm, preferably between 30 mm-60 mm.
  • FIG. 5 shows a grinding roller 12 which essentially corresponds to the grinding roller 12 shown in FIG. 4, the same elements being provided with the same reference numerals.
  • the grinding roller 12 of FIG. 5 has a plurality of wear elements 46, 48.
  • a plurality of wear protection elements 46 are attached to the axially inward-facing side surface of the edge element 18, 20.
  • the inward-facing side surfaces are the side surfaces of the edge elements 18, 20 facing one another.
  • the wear protection elements 46 are preferably plate-shaped and releasably attached to the edge element, for example by means of screws, gluing or soldering.
  • a plurality of wear protection elements 48 are arranged in the circumferential grooves 42, 44.
  • the wear protection elements 48 are designed, for example, in the form of a partial ring and in particular are arranged next to one another in the respective groove 42, 44, so that they form a closed wear surface.
  • the wear protection elements 48 have a height that corresponds to the depth of the respective groove 42, 48, so that they are flush with the grinding surface 40.
  • the wear protection elements 46, 48 are formed, for example, from hard metal, ceramic or a combination of these materials.
  • the wear protection elements 46, 48 comprise tungsten carbide, ceramic, titanium carbide, boron carbide or chromium carbide or a mixture of these materials. It is also conceivable that an overlay weld or a wear-resistant coating made of hard metal, ceramic, diamonds or carbides is applied to the inwardly facing side surface of the edge elements 18, 20.
  • FIG. 6 shows a further embodiment of a roller mill 10 with a grinding roller with edge elements 18, 20, the roller mill 10 essentially corresponding to the roller mill 10 shown in FIG. 1 with the difference that each grinding roller 12, 14 in the exemplary embodiment of FIG. 6 each has an intermediate element 50, 52, which between the respective roller shaft 30, 32 and the respective
  • Roller base body 38 is arranged.
  • the intermediate element 50, 52 is preferably hollow-cylindrical, in particular slightly conical, and is in each case firmly attached to the respective roller shaft 30, 32 coaxially to the latter, so that it rotates with the roller shaft 30, 32.
  • the intermediate elements have the same material as the roller base body 38.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)

Abstract

La présente invention concerne un cylindre broyeur (12, 14) d'un broyeur à cylindres (10) présentant un arbre de cylindre (30) et un corps de base de cylindre (37, 38) disposé autour de l'arbre de cylindre (30), lequel présente une surface de broyage (40), le corps de base de cylindre (37, 38) du cylindre broyeur (12, 14) comprenant sur au moins une zone d'extrémité un élément de bordure (18, 20), qui fait saillie au-delà de la surface de broyage (40) dans la direction radiale du cylindre broyeur (12, 14), l'élément de bordure étant formé d'une seule pièce avec le corps de base de cylindre. L'invention concerne aussi un procédé pour la fabrication d'un tel cylindre broyeur, le corps de base de cylindre étant fabriqué avec l'au moins un élément de bordure (18, 20) par forgeage, coulage ou usinage par enlèvement de copeaux, de telle sorte que le corps de base de cylindre est formé d'une seule pièce avec l'au moins un élément de bordure (18, 20).
PCT/EP2019/085142 2019-01-09 2019-12-13 Cylindre broyeur comprenant des éléments de bordure WO2020143997A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019200190.4 2019-01-09
DE102019200190.4A DE102019200190A1 (de) 2019-01-09 2019-01-09 Mahlwalze mit Randelementen

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WO2020143997A1 true WO2020143997A1 (fr) 2020-07-16

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WO (1) WO2020143997A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112295659A (zh) * 2020-10-26 2021-02-02 辽宁五寰特种材料与智能装备产业技术研究院有限公司 一种新型高压辊磨机辊系结构
US20220410166A1 (en) * 2021-06-23 2022-12-29 Metso Outotec USA Inc. Grinding roll and a grinding assembly comprising the grinding roll

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Publication number Priority date Publication date Assignee Title
EP0383004A1 (fr) * 1989-02-16 1990-08-22 Klöckner-Humboldt-Deutz Aktiengesellschaft Rouleaux pour presses à cylindres à haute pression
DE102006003230A1 (de) * 2006-01-24 2007-07-26 Khd Humboldt Wedag Gmbh Walzen-Paar für Hochdruck-Walzenpressen zur Druckzerkleinerung körnigen Gutes
CN101823011A (zh) * 2010-03-23 2010-09-08 中信重工机械股份有限公司 一种辊压磨的柱钉式辊面结构及柱钉更换方法
WO2012079965A2 (fr) * 2010-12-17 2012-06-21 Thyssenkrupp Polysius Ag Cylindre broyeur d'un broyeur à cylindre
DE202014006837U1 (de) 2014-08-27 2014-09-08 Thyssenkrupp Ag Mahlwalze für eine Walzenmühle, sowie eine Walzenmühle
CN104307592A (zh) * 2014-10-29 2015-01-28 成都利君实业股份有限公司 一种辊压机及高压辊磨机用辊子侧面防磨损装置

Family Cites Families (2)

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Publication number Priority date Publication date Assignee Title
US8708264B2 (en) * 2012-04-20 2014-04-29 Metso Minerals (Sweden) Ab Roller crusher having at least one roller comprising a flange
DE102017208014A1 (de) * 2017-05-11 2018-11-15 Thyssenkrupp Ag Walzenmühle und Verfahren zum Betreiben einer Walzenmühle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0383004A1 (fr) * 1989-02-16 1990-08-22 Klöckner-Humboldt-Deutz Aktiengesellschaft Rouleaux pour presses à cylindres à haute pression
DE102006003230A1 (de) * 2006-01-24 2007-07-26 Khd Humboldt Wedag Gmbh Walzen-Paar für Hochdruck-Walzenpressen zur Druckzerkleinerung körnigen Gutes
CN101823011A (zh) * 2010-03-23 2010-09-08 中信重工机械股份有限公司 一种辊压磨的柱钉式辊面结构及柱钉更换方法
WO2012079965A2 (fr) * 2010-12-17 2012-06-21 Thyssenkrupp Polysius Ag Cylindre broyeur d'un broyeur à cylindre
DE202014006837U1 (de) 2014-08-27 2014-09-08 Thyssenkrupp Ag Mahlwalze für eine Walzenmühle, sowie eine Walzenmühle
CN104307592A (zh) * 2014-10-29 2015-01-28 成都利君实业股份有限公司 一种辊压机及高压辊磨机用辊子侧面防磨损装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112295659A (zh) * 2020-10-26 2021-02-02 辽宁五寰特种材料与智能装备产业技术研究院有限公司 一种新型高压辊磨机辊系结构
CN112295659B (zh) * 2020-10-26 2022-04-29 辽宁五寰特种材料与智能装备产业技术研究院有限公司 一种高压辊磨机辊系结构
US20220410166A1 (en) * 2021-06-23 2022-12-29 Metso Outotec USA Inc. Grinding roll and a grinding assembly comprising the grinding roll
US11612895B2 (en) * 2021-06-23 2023-03-28 Metso Outotec USA Inc. Grinding roll and a grinding assembly comprising the grinding roll

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