EP4065282A1 - Élément résistant à l'usure pour un appareil de broyage - Google Patents

Élément résistant à l'usure pour un appareil de broyage

Info

Publication number
EP4065282A1
EP4065282A1 EP20810984.3A EP20810984A EP4065282A1 EP 4065282 A1 EP4065282 A1 EP 4065282A1 EP 20810984 A EP20810984 A EP 20810984A EP 4065282 A1 EP4065282 A1 EP 4065282A1
Authority
EP
European Patent Office
Prior art keywords
wear
protection element
wear protection
area
ceramic
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.)
Granted
Application number
EP20810984.3A
Other languages
German (de)
English (en)
Other versions
EP4065282B1 (fr
Inventor
Marc TIGGES
Baris Irmak
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
Original Assignee
ThyssenKrupp AG
ThyssenKrupp Industrial Solutions 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
Priority claimed from BE20195840A external-priority patent/BE1027797B1/de
Priority claimed from DE102019218219.4A external-priority patent/DE102019218219A1/de
Application filed by ThyssenKrupp AG, ThyssenKrupp Industrial Solutions AG filed Critical ThyssenKrupp AG
Publication of EP4065282A1 publication Critical patent/EP4065282A1/fr
Application granted granted Critical
Publication of EP4065282B1 publication Critical patent/EP4065282B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • B02C4/305—Wear resistant 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
    • 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
    • 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

Definitions

  • the invention relates to a wear protection element for partial insertion into a recess on the surface of a wear surface of a comminution device and a comminution device with such a wear protection element.
  • the connection between the base body and the wear protection element is usually destroyed by heating and expelled or pulled out of the recess in the base body, for example a roller body, by means of the gases produced during heating.
  • the gases escape through cracks in the material.
  • Mechanical removal of the ceramic wear protection element is also complex since, for example, it is not possible to solder a metal to pull out the wear protection element. The replacement of the wear protection elements therefore often results in long downtimes of the roller mill and high maintenance costs.
  • the invention comprises a wear protection element for partial insertion into a recess on the surface of a wear surface of a comminution device, the wear protection element having a fastening area which can be connected to the recess in the surface of the wear area and a wear area which is at least partially from the Surface of the wear surface protrudes.
  • the fastening area is made of a metal.
  • the wear area has a jacket and a core arranged at least partially within the jacket, the core being made from a metal and the jacket being made from a ceramic. In particular, the core is arranged completely within the jacket.
  • the material of the jacket comprises a ceramic which has yttrium-stabilized, tetragonal polycrystalline zirconium oxide (TPZ), the TPZ having a volume fraction of at least 60%, preferably at least 80%, in particular 95% to 100% of the ceramic.
  • TPZ yttrium-stabilized, tetragonal polycrystalline zirconium oxide
  • the crushing device is, for example, a roller mill, a roller crusher, a hammer mill or a vertical roller mill, the wear surface in particular the surface of a grinding roller exposed to high wear during operation of the crushing device, the hammer tools and the surface of the grinding track of a hammer mill or the surface of the Rolls and the grinding table of a vertical roller mill is.
  • the wear protection element is, for example, cylindrical or has a polygonal cross section. In particular, one end of the
  • Wear protection element designed such that it can be attached to the surface of the wear surface, in particular in a recess in the surface of the wear surface.
  • the fastening area is preferably arranged in such a way that it is exposed to no or only very little wear during operation of the comminuting device.
  • the fastening area is used to fasten the Wear protection element on the surface of the wear surface.
  • the wear area is arranged on the fastening area and preferably extends at the level of the wear protection element beyond the fastening area, so that the wear area is exposed to the majority of the wear acting on the wear protection element.
  • the wear area is preferably attached completely outside the surface of the wear surface, with only the fastening area being arranged in the recess of the wear surface.
  • the fastening area and the core of the wear area are, for example, completely made of a metal such as steel or hard metal such as tungsten carbide.
  • the jacket is preferably made entirely of a ceramic.
  • the core is, for example, cylindrical and extends in particular from the fastening area through the entire wear area. It is also conceivable that the core has a square or polygonal cross section.
  • the core preferably extends in the axial direction along the central axis of the wear protection element through the wear area. It is also conceivable that the core extends along an outer surface of the wear element in the axial direction.
  • Such a wear protection element can be produced much more economically, since it is possible to dispense with the formation of the entire wear protection element from the more expensive, more wear-resistant material such as ceramic.
  • the area of the wear protection element that is exposed to no or only very little wear has a less wear-resistant material, which results in lower material costs.
  • a core made of metal in the wear area offers the advantage that the worn wear protection element can be removed from the recess in the surface of the grinding roller. To remove the wear protection element, it is heated, for example, in order to release a connection between the fastening area and the wear surface of the comminution device. The wear protection element is then pulled out on the metal core.
  • the core extends through the entire wear area. This enables the wear protection element to be removed in a simple manner regardless of the degree of wear.
  • the core is firmly connected to the fastening area or is formed in one piece with it.
  • the fastening area with the core is produced by casting or machining, such as turning or milling. This ensures that the fastening area is removed together with the wear area.
  • the core is, for example, materially connected to the fastening area, in particular soldered, glued or welded to it.
  • the jacket is sleeve-shaped.
  • sleeve-shaped is to be understood in particular that the jacket is designed in the shape of a cylinder with a central recess, the core being arranged within the recess.
  • the fastening area is preferably cylindrical and the wear area rests against it.
  • the material of the jacket comprises a ceramic material, such as, for example, tungsten carbide WC, titanium carbide TiC, titanium carbonitride TiCN, vanadium carbide VC, chromium carbide CrC, tantalum carbide TaC, boron carbide BC, niobium carbide NbC, molybdenum carbide Mo2C, aluminum oxide / Al203, zirconium oxide Zirconium oxide, and SiO 2 carbon or a combination of the materials mentioned.
  • particles of industrial diamonds, in particular high-strength ceramics are preferably embedded in a ceramic or metallic matrix in the wear area.
  • the material of the jacket comprises a ceramic which has yttrium-stabilized, tetragonal polycrystalline zirconium oxide (TPZ), the TPZ having a volume fraction of at least 60%, preferably at least 80%, in particular 95% to 100% of the ceramic.
  • TPZ yttrium-stabilized, tetragonal polycrystalline zirconium oxide
  • This has the advantage of increased corrosion resistance of the material, especially when wet grinding.
  • the ceramic has a porosity of less than 5%, preferably less than 4%, in particular less than 3%.
  • the ceramic preferably has a porosity of at least 1%.
  • the aforementioned information on porosity is preferably the total porosity, which corresponds to an average value of the pore sizes of the material.
  • the pores are preferably distributed essentially uniformly over the ceramic material.
  • the ceramic has a density of 1.5 to 5 g / cm 3, preferably from 2 to 4 g / cm 3, in particular 2.7 to 3g / cm 3.
  • the ceramic has an Al 2 O 3 (corundum) content of 10%. This leads to improved wear resistance and, at the same time, less reduction in the toughness of the ceramic.
  • the ceramic has a ratio of monoclinic to tetragonal zirconium oxide of less than 40%, in particular less than 30%, preferably less than 20%.
  • the ratio of monoclinic to tetragonal zirconium oxide is preferably at least 2%.
  • the zirconium oxide contained in the ceramic has less than 40%, in particular less than 30%, preferably less than 20% monoclinic zirconium oxide, the remaining zirconium oxide being tetragonal zirconium oxide.
  • the ratio of monoclinic to tetragonal zirconium oxide is determined, for example, by means of X-ray diffraction in accordance with ISO 13356.
  • the yttrium-stabilized zirconium oxide of the ceramic has, in particular, a grain size D50 of less than 1.5 ⁇ m, preferably less than 1 ⁇ m, in particular less than 0.8 ⁇ m.
  • the D50 grain size of the ceramic is preferably at least 0.2 ⁇ m.
  • the D50 value means the grain size of 50% of the grains of the ceramic.
  • 50% of the grains of the yttrium-stabilized zirconium oxide have a grain size diameter of less than 1.5 ⁇ m, preferably less than 1 ⁇ m, in particular less than 0.8 ⁇ m.
  • the D90 value of the grain size is preferably less than 3 pm, in particular less than 2 pm, preferably less than 1.5 pm. Wear protection elements of a shredding device are exposed to local stresses. Therefore, a wide grain size distribution should be avoided in order to prevent the formation of cracks or breakouts.
  • the ceramic has a yttrium content of 2 to 4 mol% Y203. Advantages of such a yttrium content are better sintering behavior at an even lower sintering temperature, as well as a finer crystalline structure, which in turn leads to higher fatigue resistance and improved fracture toughness.
  • the ceramic has, for example, Ce-TZP with a content of 10 to 12 mol% of CeO 2. In particular, the ceramic has a content of 8 to 10 mol% of Mg-PSZ. It is also conceivable that the ceramic has a content of 5 to 10 mol% of MgO as a stabilizer.
  • the ceramic has a number of pores with a size of more than 200 ⁇ m of less than 0.1 per mm 2 .
  • the number of pores per surface also provides an indication of the wear resistance.
  • a small number of pores of a relatively large size, such as more than 200 ⁇ m, ensures high wear resistance, since local breakouts from the ceramic material are avoided.
  • the ceramic preferably has a number of pores with a size of more than 150 ⁇ m of less than 0.4 per mm 2 .
  • the ceramic has a number of pores with a size of more than 100 ⁇ m of less than 2 per mm 2 . Such a number of pores increases the service life of the wear protection element considerably.
  • the material of the fastening area comprises a steel, such as a hardened and tempered structural steel.
  • the jacket is firmly connected to the fastening area, for example cohesively, such as gluing or soldering, or positively.
  • the fastening area comprises less than 50%, preferably less than 20%, most preferably less than 15% of the wear protection element.
  • the fastening area comprises at least 10% of the wear protection element.
  • the invention further comprises a comminution device having a wear surface and a wear protection element as described above, the wear protection element being attached at least partially in a recess in the surface of the wear surface, in particular a grinding roller.
  • the fastening area of the wear protection element is materially connected to the grinding roller, in particular welded, glued or soldered.
  • the fastening area is preferably soldered, glued or welded to the recess in the wear surface.
  • the comminution device is, for example, a grinding roller for comminuting the bed of material or a vertical roller mill.
  • FIG. 1 shows a schematic representation of a comminution device in a front view according to an exemplary embodiment.
  • FIG. 2 shows a schematic representation of a grinding roller of the comminution device according to FIG. 1.
  • FIG 3 shows schematic representations of an exemplary embodiment of the wear protection element in a side view and a top view.
  • FIG. 4 shows schematic representations of an exemplary embodiment of the wear protection element in a sectional view.
  • a comminution device 10 in particular a roller mill, is shown schematically.
  • the comminution device 10 comprises two grinding rollers, shown schematically as circles, with wear surfaces 12, 14, which have the same diameter and are arranged next to one another.
  • a grinding gap is formed between the wear surfaces 12, 14 of the grinding rollers, the size of which is adjustable, for example.
  • the grinding rollers rotate in the direction of rotation shown by the arrows in opposite directions to one another, with ground material running through the grinding gap in the direction of fall and being ground.
  • FIG. 2 shows an end region of a grinding roller which has a wear surface 12 to which wear protection elements 16 are attached.
  • the wear protection elements 16 are mounted in the outer periphery of the surface of the grinding roller.
  • the wear protection elements 16 of FIG. 2 which are spaced apart from one another and arranged next to one another, have a circular cross section. It is also conceivable that the wear protection elements 16 vary in size, number, cross-sectional shape and arrangement to one another over the surface of the grinding roller in order to compensate for local differences in wear during operation of the comminution device 10, for example.
  • the grinding roller has wear protection corner elements 17 attached to its end which, for example, have a rectangular cross section and are arranged in a row next to one another in such a way that they form a ring over the circumference of the grinding roller.
  • wear protection corner elements 17 There are also other cross-sectional shapes of the Wear protection corner elements 17 are conceivable which differ from the cross-sectional shape shown in FIG. 2.
  • An arrangement of the wear protection corner elements 17 at a distance from one another is also possible.
  • FIG. 2 only the left end of the grinding roller with the wear surface 12 is shown by way of example, the right end (not shown) advantageously being identical in structure.
  • the wear protection element 16 has a jacket 18 and a core 20 which is at least partially radially surrounded by the jacket.
  • the core 20 extends axially along the center axis of the essentially cylindrical wear protection element 16 to the upper end face of the wear protection element 16.
  • the core 20 is, for example, cylindrical and is preferably firmly connected to the jacket 18. It is also conceivable that a plurality of cores 20, for example two, four or six cores 20, extend through the wear protection element 16, preferably parallel to one another.
  • the diameter of the core 20 is, for example, approximately 10 to 30% of the diameter of the wear protection element 16.
  • the wear protection element 16 has a fastening area 24 and a wear area 22, the fastening area 24 being arranged in the recess 26 on the surface of the wear surface 12 of the grinding roller and with the wear surface 12 the grinding roller is connected.
  • the wear protection element 16 on the fastening area 24 with the recess 26 in the surface of the wear surface 12 of the grinding roller is cohesively, in particular welded, soldered or glued or positively connected, in particular screwed or wedged.
  • the wear area 22 of the wear protection element 16 is arranged at least partially or completely outside the recess 26 in the wear surface 12, so that it protrudes from the surface of the wear surface 12 in the radial direction of the grinding roller (not shown).
  • the fastening area 24 comprises approximately one third of the entire wear protection element 16, with the wear area 22 encompassing approximately the other two thirds.
  • the fastening area 24 is preferably formed from a metal such as steel.
  • the wear area 22 of the wear protection element 16 has the jacket 18 and the core 20, the jacket 18 preferably made of a ceramic material such as tungsten carbide, titanium carbide, titanium carbonitride, vanadium carbide, chromium carbide, tantalum carbide, boron carbide, niobium carbide, molybdenum carbide, aluminum oxide, zirconium oxide, and / or silicon carbide or a combination of the materials mentioned.
  • the ceramic of the jacket comprises yttrium-stabilized, tetragonal polycrystalline zirconium oxide (TPZ), the TPZ having a volume fraction of at least 60%, preferably at least 80%, in particular 95% to 100% of the ceramic.
  • TPZ yttrium-stabilized, tetragonal polycrystalline zirconium oxide
  • particles of industrial diamonds or high-strength ceramics can also be embedded in a ceramic or metallic matrix in the jacket 18.
  • the jacket 18 has a matrix material in which a plurality of particles are arranged.
  • the particles are in particular a highly wear-resistant material that includes, for example, diamond, ceramic or titanium.
  • the matrix material includes, for example, tungsten carbide.
  • the particles are in particular materially bonded to the matrix material, for example by sintering.
  • the wear protection elements 16 are exposed to a high level of wear, in particular the wear area 22 of the wear protection elements 16 protruding from the surface of the wear surfaces 12, 14 of the grinding rollers wears.
  • the wear-resistant material of the wear area 22 considerably reduces the wear of the wear protection elements 16.
  • the fastening area which is exposed to no or only very little wear, is not made from the more expensive, more wear-resistant material.
  • the metal core makes it possible to remove the wear protection element from the recess 26 in the roll surface even if the wear area 22 is already heavily worn by pulling the wear protection element 16 out of the metal core 20 with a suitable tool.
  • the fastening area 24 is preferably formed entirely from a metal and is firmly connected to the core 20. For example, the fastening area 24 is glued, soldered or welded to the core 20 or is formed in one piece therewith.

Landscapes

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

Abstract

L'invention comprend un élément résistant à l'usure (16) destiné à être partiellement inséré dans un évidement (26) dans la surface d'une face d'usure (12) d'un dispositif de broyage, l'élément résistant à l'usure (16) présentant une zone de fixation (24), qui peut être reliée à l'évidement (26) dans la surface de la face d'usure (12), et présentant une zone d'usure (22), qui fait saillie au moins partiellement hors de la surface de la face d'usure (12), la zone de fixation (24) étant formée à partir d'un métal, la zone d'usure (22) présentant une surface latérale (18) et une partie centrale (20), qui est disposée à l'intérieur de la surface latérale (18), la partie centrale (20) étant formée à partir d'un métal et la surface latérale (18) étant formée à partir d'une substance céramique (20), et le matériau de la surface latérale comprenant une substance céramique qui contient de la zircone polycristalline tétragonale stabilisée à l'yttrium (TPZ), la TPZ contenant une proportion en volume d'au moins 60 %, de préférence d'au moins 80 %, en particulier de 95 % à 100 %, de la substance céramique.
EP20810984.3A 2019-11-26 2020-11-25 Élément résistant à l'usure pour un appareil de broyage Active EP4065282B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BE20195840A BE1027797B1 (de) 2019-11-26 2019-11-26 Verschleißschutzelement für eine Zerkleinerungseinrichtung
DE102019218219.4A DE102019218219A1 (de) 2019-11-26 2019-11-26 Verschleißschutzelement für eine Zerkleinerungseinrichtung
PCT/EP2020/083409 WO2021105237A1 (fr) 2019-11-26 2020-11-25 Élément résistant à l'usure pour un appareil de broyage

Publications (2)

Publication Number Publication Date
EP4065282A1 true EP4065282A1 (fr) 2022-10-05
EP4065282B1 EP4065282B1 (fr) 2023-12-13

Family

ID=73497796

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20810984.3A Active EP4065282B1 (fr) 2019-11-26 2020-11-25 Élément résistant à l'usure pour un appareil de broyage

Country Status (6)

Country Link
US (1) US12172172B2 (fr)
EP (1) EP4065282B1 (fr)
CN (1) CN114206504B (fr)
DK (1) DK4065282T3 (fr)
FI (1) FI4065282T3 (fr)
WO (1) WO2021105237A1 (fr)

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DE4132474A1 (de) * 1991-05-28 1992-12-03 Kloeckner Humboldt Deutz Ag Verschleissfeste mahlwalze fuer die verwendung in walzenmaschinen, insbesondere in hochdruckwalzenpressen
DE4431563A1 (de) * 1994-09-05 1996-03-07 Kloeckner Humboldt Deutz Ag Verschleißfeste Oberflächenpanzerung für die Walzen von Hochdruck-Walzenpressen zur Druckzerkleinerung körnigen Gutes (Unterlagen zu P 44 44 337.4 gegeben)
DE19638237A1 (de) * 1996-09-19 1998-03-26 Deutz Ag Verschleißfeste Oberflächenpanzerung für die Walzen von Hochdruck-Walzenpressen zur Druckzerkleinerung körnigen Gutes
CZ294041B6 (cs) * 1996-10-01 2004-09-15 Magotteaux International S.A. Otěruvzdorný díl z kompozitního materiálu
DE10335115A1 (de) * 2003-07-31 2005-02-24 Polysius Ag Mahlwalze
FI118518B (fi) * 2006-01-25 2007-12-14 Metso Powdermet Oy Menetelmä monimateriaalikomponentin tai -rakenteen valmistamiseksi sekä monimateriaalikomponentin tai -rakenteen käyttö
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WO2011064685A1 (fr) * 2009-11-25 2011-06-03 Flsmidth A/S Rouleau résistant à l'usure pour broyage et son procédé de production
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DE102013106738A1 (de) * 2013-06-27 2014-12-31 Thyssenkrupp Industrial Solutions Ag Zerkleinerungsaggregat sowie Verfahren zum Bestücken einer Umfangs- oder Oberfläche eines Zerkleinerungsaggregates mit Profilkörpern
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CN106513107A (zh) * 2016-11-15 2017-03-22 昆明理工大学 一种复合挤压辊及其制备方法

Also Published As

Publication number Publication date
US12172172B2 (en) 2024-12-24
WO2021105237A1 (fr) 2021-06-03
CN114206504A (zh) 2022-03-18
US20220410168A1 (en) 2022-12-29
DK4065282T3 (da) 2024-01-15
CN114206504B (zh) 2024-07-05
EP4065282B1 (fr) 2023-12-13
FI4065282T3 (fi) 2024-01-12

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