EP3990190A1 - Walzenmühle mit randelementen und verfahren zum einstellen eines stirnseitigen spalts der walzenmühle - Google Patents
Walzenmühle mit randelementen und verfahren zum einstellen eines stirnseitigen spalts der walzenmühleInfo
- Publication number
- EP3990190A1 EP3990190A1 EP20737367.1A EP20737367A EP3990190A1 EP 3990190 A1 EP3990190 A1 EP 3990190A1 EP 20737367 A EP20737367 A EP 20737367A EP 3990190 A1 EP3990190 A1 EP 3990190A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller
- grinding
- grinding roller
- gap
- spacer element
- 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
- 238000000034 method Methods 0.000 title claims description 12
- 125000006850 spacer group Chemical group 0.000 claims description 57
- 239000000463 material Substances 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000011435 rock Substances 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
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
- B02C4/02—Crushing or disintegrating by roller mills with two or more 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
-
- 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
- B02C4/283—Lateral sealing shields
-
- 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
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/32—Adjusting, applying pressure to, or controlling the distance between, milling members
-
- 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 roller mill with edge elements and a method for adjusting a gap on the end of the roller mill.
- Roller mills are usually used to crush grist, such as limestone, clinker or similar rocks.
- grist such as limestone, clinker or similar rocks.
- edge elements For controlled influencing of the lateral outflow of ground material 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.
- the object of the present invention is to provide a roller mill that compensates for wear on the edge elements and can be operated with different types of rock and thus reduces the maintenance costs of the roller mill and optimizes the grinding process.
- a grinding roller of a roller mill comprises a roller base body and an edge element which is attached to an end region of the roller base body of the grinding roller and extends in the radial direction beyond the surface of the roller base body of the grinding roller.
- the edge element comprises a base flange and a spacer element attached to it, a plurality of wear protection elements being attached to the spacer element.
- the edge element preferably extends 10 to 40 cm, preferably 15 to 30 cm, in particular 20 to 25 cm, beyond the surface of the roller base body, in particular the grinding surface.
- the grinding surface is preferably the jacket surface of the cylindrical basic roller body.
- the grinding surface is preferably provided with a plurality, in particular pin-shaped, wear protection elements.
- the base flange is preferably designed as an annular plate which, for example, comprises steel and is fastened, in particular welded, to the basic roller body.
- the base flange is formed in one piece with the roller base body, for example cast.
- the spacer element is attached between the wear protection element and the base flange.
- the spacer element is preferably made of steel, plastic, brass or copper.
- the spacer element is attached to the side face of the base flange facing inward in the axial direction of the grinding roller.
- the spacer element between the base flange and the wear protection element ensures a distance between the wear protection element and the base flange, this being adjustable via the selected thickness of the spacer element.
- the spacer element has, for example, a thickness of 0.1 mm to 40 mm, preferably 5 mm to 30 mm, in particular 20 mm.
- the edge element is, for example, detachably connected to the basic roller body of the grinding roller.
- the grinding roller preferably comprises a drive shaft for driving the grinding roller, on which the roller base body is arranged.
- a detachable arrangement of the edge elements on the roller base offers the advantage of quick and easy replacement of the edge elements in the event of wear.
- the edge elements are, for example, glued, soldered, welded or screwed onto the basic roller body.
- the spacer element is releasably attached to the base flange.
- the spacer element is fastened to the base element via screws or bolts.
- a plurality of spacer elements are preferably arranged next to one another on the base flange and each fastened to the base flange via a releasable connecting means, such as a screw or a bolt.
- a detachable fastening of the spacer element on the base flange enables the spacer element to be exchanged easily.
- the spacer element is exchanged in order to increase or decrease the distance between the wear protection element and the base flange.
- the spacer element is plate-shaped. According to a further embodiment, the spacer element is designed in the shape of a circular ring or part of a circular ring. For example, exactly one or a plurality of spacer elements is attached to the base element.
- the base flange is designed as an annular plate.
- the base flange is preferably firmly connected to the roller base body, in particular welded or formed in one piece with it.
- the wear protection elements are detachably attached to the spacer element.
- the wear protection elements are preferably fastened to the respective spacer element by means of a releasable connecting element, such as a screw or a bolt.
- a releasable connection of the wear protection elements enables the wear protection elements to be exchanged easily, for example in the event of wear.
- the base flange is detachably connected to the basic roller body of the grinding roller.
- the base flange is preferably attached to the round roller body by means of screws or bolts.
- the base flange is at least partially attached to the end face of the roller base body.
- a releasable connection of the base flange to the roller base body enables the complete edge element to be exchanged in a simple manner.
- the invention also comprises a roller mill having a first grinding roller and a second grinding roller, which are arranged opposite one another and can be driven in opposite directions, at least one grinding roller being designed as described above.
- a grinding gap is formed between the grinding rollers, the edge element being designed in such a way that it extends over the grinding gap and at least partially covers the opposite grinding roller at the end. It is also conceivable that each of the grinding rollers has exactly one edge element.
- Each of the grinding rollers has in particular a first end area and a second end area, the first grinding roller having an edge element at its first end area that covers the end of the first end area of the second grinding roller in the area of the grinding gap.
- the second grinding roller preferably has an edge element at its second end area which covers the front side of the second end area of the first grinding roller in the area of the grinding gap.
- the edge elements are arranged diagonally opposite one another with respect to the end regions of the grinding rollers.
- only one grinding roller has two edge elements which are attached to opposite roller ends of the grinding rollers, the opposite grinding roller having no edge element.
- An end-side gap is preferably formed between the edge elements and the end face of the respective opposing grinding roller. A gap at the end prevents the edge element from colliding with the end area of the respective opposing grinding roller in the event of the grinding rollers running incorrectly, the opposing grinding rollers not being arranged parallel to one another.
- the frontal gap serves to reduce wear on the edge elements.
- the edge elements preferably cover the opposing grinding rollers by about 2-10%, in particular 4-7%, preferably 5% of the roller diameter.
- the overlap is understood to mean the area of the opposite grinding roller along which the edge element extends in the radial direction. Too little overlap leads to the material flowing past the edge elements, while too much overlap leads to a collision if the grinding rollers are inclined to one another.
- An overlap of the edge elements of about 2-10%, in particular 4-7%, preferably 5% of the roller diameter offers an optimal overlap, a collision and a flow of the material over the edge elements being avoided.
- the grinding rollers of the roller mill are preferably of identical construction. This offers the advantage that the grinding rollers can be easily exchanged in the event of maintenance and enables time and cost savings.
- the invention also includes a method for adjusting an end-side gap of a roller mill with 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 is formed between the grinding rollers, each of the grinding rollers having an edge element at one end region of a respective roller end, which is designed such that it extends over the grinding gap and at least partially covers the opposite grinding roller at the end, so that between the edge element and the end face the respective opposite grinding roller an end gap is formed.
- the edge element has a base flange.
- the advantages described with reference to the grinding roller apply analogously to the method for setting an end-side gap.
- the method described is preferably used to adjust the width of the front-side gap, the width of the front-side gap preferably being dependent on the thickness of the spacer element.
- the spacer element is in particular on the side face of the facing axially inward in the direction of the frontal gap Base flange attached so that the width of the frontal gap is reduced.
- Each edge element of the roller mill preferably has an identical spacer element, so that the front gaps of a grinding roller preferably have the same width. It is also conceivable for a plurality, for example two or three, spacer elements to be attached next to one another in the axial direction to a respective base flange.
- the spacer element and the wear protection elements are releasably attached to the base flange.
- the spacer element is preferably attached to the base flange by means of screws or bolts.
- the wear protection elements are preferably each attached to the spacer element by means of releasable fastening means such as screws.
- the plurality of spacer elements are screwed to one another and to the base flange.
- a previously described edge element with a spacer element and a plurality of wear protection elements offers the advantage that the front gap can be easily adjusted so that, depending on the application, a spacer element with a corresponding thickness can be easily attached to the base flange and the desired front gap is thus set.
- FIG. 1 shows a schematic representation of a roller mill with two grinding rollers, each having an edge element, according to an exemplary embodiment.
- FIG. 2 shows a schematic representation of a roller mill, a grinding roller having two edge elements according to a further exemplary embodiment.
- 3 shows a schematic representation of a grinding roller with two edge elements in a perspective view and a top 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.
- the grinding rollers 12, 14 are arranged opposite one another and can be driven in opposite directions.
- a grinding gap 16, which extends in the axial direction, is formed between the grinding rollers 12, 14.
- the grinding rollers 12, 14 are arranged parallel to one another, so that the grinding gap 16 extending between the grinding rollers 12, 14 has a constant width.
- Each of the grinding rollers 12, 14 furthermore has a drive shaft 30, 32 which extends along the central axis through the respective grinding roller 12, 14 and which drives the grinding rollers to rotate about their central axis.
- the first and second grinding rollers 12, 14 have the same diameter and the same length and are of essentially identical design.
- the grinding rollers 12, 14 each have a first end region 24, 28 and a second end region 22, 26, which are arranged at opposite ends of the grinding roller.
- the first end area 24 of the first grinding roller 12 is arranged opposite the first end area 28 of the second grinding roller 14, the second end area 22 of the first grinding roller 12 being arranged opposite the second end area 26 of the second grinding roller 14.
- the roller mill 10 also has a first edge element 18 and a second edge element 20, an edge element 18, 20 being arranged on each grinding roller 12, 14.
- the edge elements 18, 20 are arranged diagonally opposite one another in relation to the end regions 22 to 28 of the grinding rollers 12, 14.
- the first grinding roller 12 has an edge element 18 at its first end area 24, which extends in the radial direction over the grinding gap 16 and partially covers the end face of the second grinding roller 14 at the first end area 28.
- the second grinding roller 14 has an edge element 20 at its second end area 26, which extends in the radial direction over the grinding gap 16 and partially covers the end face of the first grinding roller 12 at its second edge area 22.
- the second edge element 20 is related arranged on the first edge element 18 at 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-side gap 34 is formed between the first edge element 18 and the end face of the second grinding roller 14 and a second end-side gap is formed between the second edge element 20 and the end face of the first grinding roller 12 36 is formed.
- the first and the second end gap 34, 36 each extend in the radial direction.
- Each grinding roller 12, 14 comprises a preferably cylindrical roller base body
- the edge elements 18, 20 each include, for example, a circumferential circular ring which is attached to the respective grinding roller 12, 14 in a manner not shown.
- the edge elements 18, 20 are attached to the end face or to the outer circumference of the grinding roller, in particular the respective roller base body. On the outer circumference of the respective grinding roller
- edge elements 18, 20 are made of a wear-resistant material such as steel, for example, and have a thickness of 10 mm to 100 mm and cover the opposing grinding rollers 12, 14 by about 2-10%, in particular 4-7%, preferably 5 % of the roll diameter.
- Fig. 2 shows a roller mill 10 with a first grinding roller 12 and a second grinding roller 14 according to the embodiment of FIG. 1.
- the first edge element 18 is attached to the first edge area 22 of the first grinding roller 12 and extends in the radial direction over the grinding gap 16 so that it partially covers the end face of the second grinding roller 14 at the first end area 26.
- the second edge element 20 is attached to the second end area 24 of the first grinding roller 12 and extends in the radial direction over the grinding gap 16, so that the end face of the second grinding roller 14 faces the second end area 28 partially covered.
- a front-side gap 34, 36 is formed between the edge elements 18 and the respective end face of the second grinding roller 14.
- FIG. 3 shows a grinding roller, for example the first grinding roller 12 of FIGS. 1 and 2, with two edge elements 18, 20.
- Each of the edge elements 18, 20 comprises a base flange 38, which is, for example, an annular plate.
- the base flange 38 is preferably formed in one piece from, for example, steel and is fastened to the basic roller body of the grinding roller 12, in particular welded or formed in one piece with this, in particular cast.
- a spacer element 40 is attached to the base flange 38.
- the spacer element 40 is designed, for example, as a circular plate. It is also conceivable that the spacer element 40 has a plurality of segments in the shape of a partially circular ring, which preferably together form a circular ring and are attached to the base flange next to one another.
- the spacer element 40 is preferably made of steel, plastic, brass or copper.
- the spacer element 40 is, for example, detachably attached to the base flange by means of a force-fit and / or form-fit connection means.
- the spacer element 40 is fastened to the base flange 38 by means of one or a plurality of screws.
- the spacer element 40 is attached to the side surface facing inward in the axial direction of the grinding roller 12 and covers it completely, for example.
- a plurality of wear protection elements 42 are attached to the spacer element 40.
- the wear protection elements 42 are, for example, plate-shaped and made of a wear-resistant material such as tungsten carbide or ceramic.
- the wear protection elements 42 are preferably attached next to one another on the spacer element 40, so that the surface of the spacer element 40 facing inward in the axial direction of the grinding roller 12 is preferably completely covered by one or a plurality of wear protection elements 42.
- the wear protection elements 42 are fastened to the spacer element 40, for example, by means of a releasable connecting means such as screws or bolts.
- the grinding roller 12 has, for example, an edge protection 44, which preferably comprises a plurality of corner blocks which are attached, for example, in a circumferential groove at an end region of the grinding roller. The edge protection 44 preferably rests against the wear protection elements 42.
- a spacer element 40 enables the front-side gap 34, 36 of the roller mill 10 to be easily adjusted, in particular without an axial displacement of the grinding rollers 12, 14 relative to one another.
- a spacer element 40 with a corresponding thickness is attached to the base flange 38. Then, for example, the wear protection elements 42 are fastened to the spacer element 40.
- an axial displacement of at least one of the grinding rollers 12, 14 relative to the other grinding roller 12, 14 is possible.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019209511.9A DE102019209511A1 (de) | 2019-06-28 | 2019-06-28 | Walzenmühle mit Randelementen und Verfahren zum Einstellen eines stirnseitigen Spalts der Walzenmühle |
PCT/EP2020/067541 WO2020260308A1 (de) | 2019-06-28 | 2020-06-23 | Walzenmühle mit randelementen und verfahren zum einstellen eines stirnseitigen spalts der walzenmühle |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3990190A1 true EP3990190A1 (de) | 2022-05-04 |
EP3990190B1 EP3990190B1 (de) | 2023-05-10 |
Family
ID=71527746
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20737367.1A Active EP3990190B1 (de) | 2019-06-28 | 2020-06-23 | Walzenmühle mit randelementen und verfahren zum einstellen eines stirnseitigen spalts der walzenmühle |
Country Status (12)
Country | Link |
---|---|
US (1) | US20220258170A1 (de) |
EP (1) | EP3990190B1 (de) |
AU (1) | AU2020301519B2 (de) |
BR (1) | BR112021026637A2 (de) |
CA (1) | CA3138798C (de) |
CL (1) | CL2021003504A1 (de) |
DE (1) | DE102019209511A1 (de) |
DK (1) | DK3990190T3 (de) |
FI (1) | FI3990190T3 (de) |
PE (1) | PE20220115A1 (de) |
WO (1) | WO2020260308A1 (de) |
ZA (1) | ZA202109426B (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11612895B2 (en) * | 2021-06-23 | 2023-03-28 | Metso Outotec USA Inc. | Grinding roll and a grinding assembly comprising the grinding roll |
BE1031004B1 (de) * | 2022-10-28 | 2024-06-04 | Smidth As F L | Eckblocksegment für eine Walze einer Zerkleinerungsvorrichtung |
WO2024089672A1 (en) * | 2022-10-28 | 2024-05-02 | Flsmidth A/S | Corner block segment for a roll of a comminution device |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE457037C (de) | 1928-03-06 | Bergedorfer Maschinenfabrik Vo | Walzwerk zum Aufbereiten von Ton oder anderen breiigen oder koernigen Massen mit an den Stirnseiten der Walzen liegenden Abschlussplatten fuer den Walzenspalt | |
DE4037816A1 (de) * | 1990-11-28 | 1992-06-04 | Kloeckner Humboldt Deutz Ag | Walzwerk |
DK176624B1 (da) | 2007-07-25 | 2008-12-01 | Smidth As F L | Valsepresse med fleksible ringskivesektioner |
US8833687B2 (en) * | 2012-04-20 | 2014-09-16 | Metso Minerals Industries, Inc. | Crushing roll with edge protection |
US8708264B2 (en) * | 2012-04-20 | 2014-04-29 | Metso Minerals (Sweden) Ab | Roller crusher having at least one roller comprising a flange |
EP3248685A2 (de) | 2012-04-20 | 2017-11-29 | Metso Minerals (Sweden) AB | Rollenanschlag mit mindestens einer rolle mit flansch |
AU2014211783B2 (en) * | 2013-02-04 | 2015-08-20 | Flsmidth A/S | Roller press |
DE202014006837U1 (de) | 2014-08-27 | 2014-09-08 | Thyssenkrupp Ag | Mahlwalze für eine Walzenmühle, sowie eine Walzenmühle |
DE102017208014A1 (de) * | 2017-05-11 | 2018-11-15 | Thyssenkrupp Ag | Walzenmühle und Verfahren zum Betreiben einer Walzenmühle |
-
2019
- 2019-06-28 DE DE102019209511.9A patent/DE102019209511A1/de active Pending
-
2020
- 2020-06-23 EP EP20737367.1A patent/EP3990190B1/de active Active
- 2020-06-23 FI FIEP20737367.1T patent/FI3990190T3/fi active
- 2020-06-23 DK DK20737367.1T patent/DK3990190T3/da active
- 2020-06-23 US US17/622,066 patent/US20220258170A1/en active Pending
- 2020-06-23 CA CA3138798A patent/CA3138798C/en active Active
- 2020-06-23 PE PE2021002244A patent/PE20220115A1/es unknown
- 2020-06-23 WO PCT/EP2020/067541 patent/WO2020260308A1/de active Application Filing
- 2020-06-23 AU AU2020301519A patent/AU2020301519B2/en active Active
- 2020-06-23 BR BR112021026637A patent/BR112021026637A2/pt active Search and Examination
-
2021
- 2021-11-23 ZA ZA2021/09426A patent/ZA202109426B/en unknown
- 2021-12-27 CL CL2021003504A patent/CL2021003504A1/es unknown
Also Published As
Publication number | Publication date |
---|---|
US20220258170A1 (en) | 2022-08-18 |
DK3990190T3 (da) | 2023-06-06 |
BR112021026637A2 (pt) | 2022-02-15 |
EP3990190B1 (de) | 2023-05-10 |
DE102019209511A1 (de) | 2020-12-31 |
CL2021003504A1 (es) | 2022-09-09 |
PE20220115A1 (es) | 2022-01-26 |
FI3990190T3 (fi) | 2023-06-02 |
CA3138798A1 (en) | 2020-12-30 |
AU2020301519B2 (en) | 2023-02-16 |
CA3138798C (en) | 2023-08-22 |
AU2020301519A1 (en) | 2022-02-24 |
ZA202109426B (en) | 2022-09-28 |
WO2020260308A1 (de) | 2020-12-30 |
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