EP4065281A1 - VERSCHLEIßSCHUTZELEMENT FÜR EINE ZERKLEINERUNGSEINRICHTUNG - Google Patents
VERSCHLEIßSCHUTZELEMENT FÜR EINE ZERKLEINERUNGSEINRICHTUNGInfo
- Publication number
- EP4065281A1 EP4065281A1 EP20808486.3A EP20808486A EP4065281A1 EP 4065281 A1 EP4065281 A1 EP 4065281A1 EP 20808486 A EP20808486 A EP 20808486A EP 4065281 A1 EP4065281 A1 EP 4065281A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wear
- protection element
- wear protection
- ceramic
- less
- 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
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 invention comprises a wear protection element for attachment to a comminution device or a silo, the wear protection element being made entirely of a ceramic comprising 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.
- the wear protection element is, for example, cylindrical or has a polygonal cross section.
- one end of the wear protection element is designed in such a way that it can be fastened to the surface of the wear surface, in particular in a recess in the surface of the wear surface.
- 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 designed, for example, in the form of a plate and is attached to the inner wall of a store, in particular a silo for mineral rocks.
- the wear protection element is made entirely from the ceramic. It is also conceivable that only part of the wear protection element, such as, for example, the area protruding from the surface of the comminution device, is formed from the ceramic. For example, the wear protection element has a fastening area which is attached partially or completely in the recess in the surface of the comminution device and a wear area which is completely or partially formed from the ceramic.
- a wear protection element made from yttrium-stabilized, tetragonal polycrystalline zirconium oxide (TPZ) exhibits very favorable wear behavior together with high toughness. This is particularly advantageous when using such wear protection elements in shredding devices.
- 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 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 zirconia 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 an yttrium content of 2-4 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 10-12 mol% of Ce02.
- the ceramic has a content of 8-10 mol% of Mg-PSZ. It is also conceivable that the ceramic has a content of 5-10 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 invention also comprises a comminution device with a wear surface and a wear protection element as described above, the wear protection element being at least partially attached in a recess in the surface of the wear surface.
- this is Wear protection element materially connected to the wear surface, in particular welded, glued or soldered.
- 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 sectional view.
- FIG. 4 shows schematic representations of a further 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.
- 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 and arranged next to one another, have a circular cross section. It is also conceivable that the wear protection elements 16 vary over the surface of the grinding roller in terms of size, number, cross-sectional shape and arrangement in relation to one another, for example to compensate for local differences in wear during operation of the comminution device 10.
- 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.
- Further cross-sectional shapes of the wear protection corner elements 17 are also 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 is, for example, cylindrical and made entirely from a ceramic.
- the ceramic is the 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 ceramic material offers the advantage of a particularly high level of wear resistance and, at the same time, a relatively inexpensive setting.
- the wear protection element 16 having a jacket 18 and a core 20 which is at least partially radially surrounded by the jacket 18.
- the core 20 extends axially along the central axis of the essentially cylindrical wear protection element 16 up 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 is cohesively connected to the fastening area 24 with the recess 26 in the surface of the wear surface 12 of the grinding roller, 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, the wear area 22 approximately comprising 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 comprises the yttrium-stabilized, tetragonal polycrystalline zirconium oxide (TPZ).
- TPZ yttrium-stabilized, tetragonal polycrystalline zirconium oxide
- particles of industrial diamonds for example 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.
- 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)
- Crushing And Pulverization Processes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE20195837A BE1027796B1 (de) | 2019-11-26 | 2019-11-26 | Verschleißschutzelement für eine Zerkleinerungseinrichtung |
| DE102019218217.8A DE102019218217A1 (de) | 2019-11-26 | 2019-11-26 | Verschleißschutzelement für eine Zerkleinerungseinrichtung |
| PCT/EP2020/083406 WO2021105235A1 (de) | 2019-11-26 | 2020-11-25 | VERSCHLEIßSCHUTZELEMENT FÜR EINE ZERKLEINERUNGSEINRICHTUNG |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4065281A1 true EP4065281A1 (de) | 2022-10-05 |
| EP4065281B1 EP4065281B1 (de) | 2024-03-06 |
Family
ID=73476189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20808486.3A Active EP4065281B1 (de) | 2019-11-26 | 2020-11-25 | Verschleissschutzelement für eine zerkleinerungseinrichtung |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20220410169A1 (de) |
| EP (1) | EP4065281B1 (de) |
| CN (1) | CN114375228B (de) |
| DK (1) | DK4065281T3 (de) |
| FI (1) | FI4065281T3 (de) |
| WO (1) | WO2021105235A1 (de) |
Family Cites Families (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2808637B2 (ja) * | 1988-02-24 | 1998-10-08 | 住友化学工業株式会社 | 導電性ジルコニア焼結体 |
| JP4048017B2 (ja) * | 2000-04-28 | 2008-02-13 | 株式会社ニッカトー | 耐久性および耐摩耗性にすぐれたジルコニア質焼結体からなる粉砕・分散用メディア |
| JP4443806B2 (ja) * | 2001-10-18 | 2010-03-31 | 株式会社ニッカトー | 耐久性に優れたジルコニア質焼結体およびそれを用いた粉砕・分散機用部材 |
| EP1403918A1 (de) * | 2002-09-25 | 2004-03-31 | Corning Incorporated | Halbleitervorrichtung und Herstellungsverfahren |
| CN1583280A (zh) * | 2004-06-10 | 2005-02-23 | 济南倍力粉技术工程有限公司 | 振动研磨筒及其制作方法 |
| DE102006010042A1 (de) | 2006-03-04 | 2007-09-06 | Khd Humboldt Wedag Gmbh | Hartkörper für den autogenen Verschleißschutz von Walzenoberflächen |
| KR100842096B1 (ko) * | 2006-12-07 | 2008-06-30 | 김대현 | 치과용 임플란트 지대주 및 상부구조물에 있어 연결 구조가형성된 블록체 및 그 제조방법 |
| WO2010136207A1 (en) * | 2009-05-29 | 2010-12-02 | Metalogenia, S.L. | Wear element for earth/rock working operations with enhanced wear resistance |
| CA2784643C (en) * | 2009-12-18 | 2017-04-04 | Metso Minerals (Wear Protection) Ab | Bimaterial elongated insert member for a grinding roll |
| CN202015631U (zh) * | 2011-03-25 | 2011-10-26 | 南通高欣金属陶瓷复合材料有限公司 | 中速磨煤机陶瓷复合磨辊 |
| DE102011054573A1 (de) * | 2011-10-18 | 2013-04-18 | Betek Gmbh & Co. Kg | Verschleißschutzelement |
| TW201330979A (zh) * | 2011-10-28 | 2013-08-01 | Smidth As F L | 耐磨滾輪 |
| CN103111347A (zh) * | 2013-01-29 | 2013-05-22 | 北京理研社技术有限公司 | 一种磨辊和磨盘瓦 |
| DE102013104098A1 (de) * | 2013-04-23 | 2014-10-23 | Thyssenkrupp Industrial Solutions Ag | Vorrichtung zur Zerkleinerung von abrasiven Materialien |
| CN103736549B (zh) * | 2014-01-02 | 2015-07-01 | 洛阳鹏飞耐磨材料股份有限公司 | 一种立磨机金属基陶瓷复合材料磨辊的制备方法 |
| JP6527139B2 (ja) * | 2014-04-17 | 2019-06-05 | 日本碍子株式会社 | 多孔質板状フィラー、断熱膜、及び多孔質板状フィラーの製造方法 |
| BE1021335B1 (fr) * | 2014-07-16 | 2015-11-03 | Magotteaux International S.A. | Grains ceramiques et procede pour leur production. |
| WO2016150719A1 (en) * | 2015-03-25 | 2016-09-29 | Flsmidth A/S | A wear-resistant body and a method for producing the same |
| DE102015207922A1 (de) * | 2015-04-29 | 2016-11-03 | Takraf Gmbh | Hartkörper als Rasterpanzerung für eine Rollenpresse, Verfahren zur dessen Herstellung, und Rolle für eine Rollenpresse |
| DE102016200911A1 (de) * | 2016-01-22 | 2017-07-27 | Thyssenkrupp Ag | Verschleißschutzelement für eine Zerkleinerungseinrichtung |
| DE102016200912A1 (de) * | 2016-01-22 | 2017-07-27 | Thyssenkrupp Ag | Verschleißschutzelement für eine Zerkleinerungseinrichtung |
| CN106000565B (zh) * | 2016-05-13 | 2018-05-29 | 东莞市煜田新材料有限公司 | 陶瓷内定子 |
| CN108201923B (zh) * | 2016-12-16 | 2019-10-18 | 邯郸史威新材料有限公司 | 一种陶瓷复合齿辊破碎机辊齿的制备方法 |
| DE102017211948B3 (de) * | 2017-07-12 | 2018-03-22 | Thyssenkrupp Ag | Siebsegment mit einem Verschleißschutz sowie Verfahren zum Herstellen eines Siebsegments |
| CN108342657B (zh) * | 2018-03-27 | 2019-06-11 | 东北大学 | 一种高耐磨金属陶瓷复合辊套及其制备方法 |
| CN109704731B (zh) * | 2019-03-15 | 2021-09-21 | 中南大学 | 一种纳米钇稳定的氧化锆-氧化铝复合粉末的制备方法 |
-
2020
- 2020-11-25 EP EP20808486.3A patent/EP4065281B1/de active Active
- 2020-11-25 US US17/780,234 patent/US20220410169A1/en active Pending
- 2020-11-25 DK DK20808486.3T patent/DK4065281T3/da active
- 2020-11-25 CN CN202080061583.2A patent/CN114375228B/zh active Active
- 2020-11-25 WO PCT/EP2020/083406 patent/WO2021105235A1/de not_active Ceased
- 2020-11-25 FI FIEP20808486.3T patent/FI4065281T3/fi active
Also Published As
| Publication number | Publication date |
|---|---|
| FI4065281T3 (fi) | 2024-03-26 |
| BR112022009847A2 (pt) | 2022-08-02 |
| CN114375228B (zh) | 2024-06-28 |
| CN114375228A (zh) | 2022-04-19 |
| DK4065281T3 (da) | 2024-04-02 |
| EP4065281B1 (de) | 2024-03-06 |
| WO2021105235A1 (de) | 2021-06-03 |
| US20220410169A1 (en) | 2022-12-29 |
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