EP2756886B1 - Roller crusher having at least one roller comprising a flange - Google Patents
Roller crusher having at least one roller comprising a flange Download PDFInfo
- Publication number
- EP2756886B1 EP2756886B1 EP14164193.6A EP14164193A EP2756886B1 EP 2756886 B1 EP2756886 B1 EP 2756886B1 EP 14164193 A EP14164193 A EP 14164193A EP 2756886 B1 EP2756886 B1 EP 2756886B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller
- flange
- rollers
- crusher
- roller crusher
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000463 material Substances 0.000 claims description 50
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000005219 brazing Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- -1 ore Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Images
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
- B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B3/00—Presses characterised by the use of rotary pressing members, e.g. rollers, rings, discs
- B30B3/04—Presses characterised by the use of rotary pressing members, e.g. rollers, rings, discs co-operating with one another, e.g. with co-operating cones
Definitions
- the roller crusher may comprise a flange attached to each end of one of said rollers, respectively.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Crushing And Grinding (AREA)
Description
- The invention relates to a roller crusher having two generally parallel rollers arranged to rotate in opposite directions, towards each other, and separated by a gap, each roller having a first end and a second end.
- When crushing or grinding rock, ore, cement clinker and other hard materials roller crushers may be used having two generally parallel rolls which rotate in opposite directions, towards each other, and which are separated by a gap. The material to be crushed is fed by gravity or choke-fed into the gap. One type of roller crusher is called high pressure grinding rollers or high pressure roller crushers. This type of roller crusher uses a crushing technique called interparticle crushing. Here, the material to be crushed or pulverised is crushed not only by the crushing surface of the rolls, but also by particles in the material to be crushed, hence the name interparticle crushing.
- One example of a high pressure grinding roller is described in
EP-516 952 - Other examples of grinding rollers having an improved roll for a roller press are described in
DE-4037816 ,US-5054701 ,DE-457037 ,US-1014383 ,US-1908519 , andWO2009013276 . - A general problem associated with existing high pressure grinding rollers is that the ratio between the roller diameter and the roller width is very important due to a significant edge effect, i.e. the crushing result is reduced at the edges of the rollers. This is because of the fact that material can escape over the edges of the rollers thereby reducing the crushing pressure on the material towards the gap at the edges of the rollers. Thus, these roller parameters cannot be varied to the desired extent.
- It is an object of the present invention to provide an improvement of the prior art. More particularly, it is an object of the present invention to provide a roller crusher for which the roller diameter and the roller width can be varied more freely without a reduced crushing result.
- These and other objects as well as advantages that will be apparent from the following description of the present invention are achieved by roller crusher according to the independent claims.
- A roller crusher having two generally parallel rollers arranged to rotate in opposite directions, towards each other, and separated by a gap is provided. Each roller has a first end and a second end. The roller crusher comprises a flange attached to at least one of the ends of one of the rollers. The flange extends in a radial direction of the roller, and has a height above an outer surface of the roller. According to the invention the flange comprises a wear-resistant structure to protect the flange from wear, wherein the structure comprises a feeding structure on the inside of the flange arranged to increase pressure on material towards the gap between the rollers. This is advantageous in that the flange eliminates the weakness spot at the edge of the rollers. The flange will help maintaining the material on the outer roller surface. That is to say, due to the flange, the material is prevented from falling over the edge of the roller. This will in turn help increasing the pressure on the material towards the gap between the rollers at the edge of the rollers. By eliminating the weakness spot at the edge of the rollers, the roller diameter and the roller width can be varied more freely without a reduced crushing result. Additionally, the flanges will facilitate the providing of an autogenous protection layer on the rollers, consisting of the material to be crushed.
- The height may be sufficient to extend across the gap to a point on the opposite of said rollers, at which point an active engagement between said opposite roller and a material to be crushed starts, when the gap is set to a maximum operational gap. The advantages mentioned above will thus be achieved at the most critical moment of the crushing operation.
- The feeding structure on the inside of the flange is advantageous in that the structure will help increasing the pressure on the material towards the gap between the rollers at the edge of the roller even further. The structure will engage with the material which will be moved inside the crushing area and the pressure will be optimized.
- The structure may be arcuate, continuous, intermittent, or a combination thereof. These are preferred embodiments of the structure.
- The flange is made of a first material and the structure of a second material, said second material being harder than said first material. This way, the structure will act as a wear-resistant element and protect the flange from wear. The structure will also help creating and holding an autogenous protection layer on the flange.
- The flange may be divided into a plurality of segments, which is advantageous in that both the manufacturing and mounting of the flange will be facilitated. The flange may be attached to the roller by means of adhesive, bolting, screwing, welding, brazing or any other suitable fastening technique.
- The roller crusher may comprise a flange attached to each end of one of said rollers, respectively. The advantages mentioned above will thus be achieved on both ends of the roller.
- Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the [element, device, component, means, etc]" are to be interpreted openly as referring to at least one instance of said element, device, component, means, etc., unless explicitly stated otherwise. Further, by the term "comprising" it is meant "comprising but not limited to" throughout the application. Lastly, the "nip angle" is defined as the angle between the horizontal plane extending through the centre of a first and a parallel second roller, and a straight line which is drawn from the centre of the first roller to and through a point on the parallel second roller, at which point an active engagement between the second roller and the material to be crushed is started. In the literature concerning this subject, two different nip angles are provided. One nip angle concerns single particle crushing, and one nip angle concerns interparticle crushing. The nip angle concerning interparticle crushing is obviously smaller than the nip angle concerning single crushing. Note that, in the present application, the nip angle concerning interparticle crushing is intended.
- The above, as well as additional objects, features and advantages of the present invention, will be better understood through the following illustrative and non-limiting detailed description of preferred embodiments of the present invention, with reference to the appended drawings, where the same reference numerals will be used for similar elements, wherein:
-
Fig. 1 is a perspective view of a roller crusher according to one exemplary embodiment of the invention, -
Fig. 2a , which is not part of the present invention, is a perspective view of a roller of the roller crusher having two flanges extending in a radial direction of the roller, -
Fig. 2b is a perspective view of a segment of one of the flanges inFig. 2a , -
Fig. 3a is a perspective view of a roller of a roller crusher having two flanges extending in a radial direction of the roller, -
Fig. 3b is a perspective view of a segment of one of the flanges inFig. 3a , -
Fig. 4a is a perspective view of a roller of a roller crusher having two flanges extending in a radial direction of the roller, -
Fig. 4b is a perspective view of a segment of one of the flange inFig. 4a , and -
Fig. 5 is a side view of the roller crusher inFig.1 , when having one flange only. -
Fig. 1 illustrates aroller crusher 1 according to one exemplary embodiment of the invention. Theroller crusher 1 has two generallyparallel rollers 2 arranged to rotate in opposite directions, towards each other, and are separated by a gap. Eachroller 2 has afirst end 3 and asecond end 4. Theroller crusher 1 comprises aflange 5 attached to the first andsecond end rollers 2 of theroller crusher 1. Theflanges 5 extend in a radial direction of theroller 2 and have a height H above anouter surface 6 of the roller which is sufficient to extend across the gap to a point on the opposite of saidrollers 2, at which point an active engagement between saidopposite roller 2 and a material to be crushed starts. The height H is sufficient to extend across the gap to a point on the opposite of saidrollers 2, at which point an active engagement between saidopposite roller 2 and a material to be crushed starts when the gap is set to a maximum operational gap. Theflanges 5 are plain and will help maintaining material to be crushed on theouter roller surface 6. That is to say, due to theflanges 5, the material is prevented from falling over the edge of theroller 2. The flanges will also facilitate the providing of an autogenous protection layer on the rollers, consisting of the material to be crushed. Theflanges 5 are divided into a plurality ofsegments 7 in order to facilitate the manufacturing and mounting of the same. Theflanges 5 are, for example, attached to theroller 2 by means of adhesive, bolting or screwing. - In
Fig. 2a , theroller 2 of theroller crusher 1 having aflange 5 on eachend roller 2 is illustrated. Theflanges 5 are plain and will eliminate the weakness spot at the edge of therollers 2. Theflanges 5 will help maintaining the material on theouter surface 6 of therollers 2 and prevent the material from falling over the edge of theroller 2. This will in turn increase the pressure on the material towards the gap between therollers 2 at the edge of therollers 2. -
Fig. 2b illustrates asegment 7 of theflange 5 inFig. 2a . As stated above, theflanges 5 are divided intosegments 7 in order to facilitate the manufacturing and mounting of the same. However, theflanges 5 can naturally be designed as one single unit. - In
Fig. 3a , a first embodiment of theroller 2 of theroller crusher 1 according to the present invention is illustrated. Here, theflanges 5 comprise afeeding structure 8 on the inside of theflanges 5. Thestructure 8 extends from the inside of theflange 5 towards theother end roller 2. Thestructure 8 is continuous and arcuate. Thestructure 8 will increase the pressure on the material towards the gap between therollers 2 at the edge of theroller 2. The material will engage with thestructure 8 and be pressured towards and through the gap, i.e. the material will be choke-fed into the gap. -
Fig. 3b illustrates asegment 7 of theflange 5 inFig. 3a . Naturally, also theflanges 5 according to this first embodiment can be designed as one single unit. - In
Fig. 4a , a second embodiment of theroller 2 of theroller crusher 1 is illustrated. Here, theflanges 5 also comprise afeeding structure 8 on the inside. However, thestructure 8 according to this embodiment is intermittent. -
Fig. 4b illustrates asegment 7 of theflange 5 inFig. 4a . Naturally, also theflanges 5 according to this second embodiment can be designed as one single unit. - In
Fig. 5 , a side view of theroller crusher 1 is illustrated in order to facilitate the understanding of the nip angle α. A first straight line has been drawn from the centre of theright roller 2 to and through a point on theleft roller 2, at which point an active engagement between theleft roller 2 and the material to be crushed is started. The nip angle α is measured between the horizontal plane extending through the centre of the left and right roller, and said first straight line. It is the smaller of the two possible angles which can be obtained in accordance with the definition presented above. In the embodiment illustrated inFig. 5 , the height H of theflange 5 above theouter surface 6 of theroller 2 is sufficient to extend across the gap to a point on the opposite of saidrollers 2, at which point an active engagement between saidopposite roller 2 and a material to be crushed starts. - During the crushing operation of the
roller crusher 1, the material to be crushed is transported to theroller crusher 1 by means of a feeding arrangement and is introduced into a funnel of the feeding arrangement. The material to be crushed is then fed to the gap between the tworollers 2 of theroller crusher 1. Theflange 5 of theroller crusher 1 will help maintaining the material on theouter roller surface 6 of therollers 2 and help increasing the pressure on the material towards the gap between the rollers throughout the width of therollers 2, especially at the edge of therollers 2. When the material has been crushed by means of the two parallel and rotating crushingrollers 2, it travels by gravity out of gap in order to be transported from the unit. - The invention has mainly been described above with reference to a few embodiments. However, as is readily appreciated by a person skilled in the art, other embodiments than the ones disclosed above are equally possible within the scope of the invention, as defined by the appended claims.
- For instance, the structure may be of any suitable size and shape, for example straight, inclined, curved, ring shaped, double or single.
- The size and shape of the flanges may also be varied to include a plurality of structures. If the flanges comprise a plurality of structures, these structures may be of different size and shape.
Claims (9)
- A roller crusher (1) having two generally parallel rollers (2) arranged to rotate in opposite directions, towards each other, and separated by a gap, each roller (2) having a first end (3) and a second end (4), said roller crusher (1) comprising:a flange (5) attached to at least one of said ends (3, 4) of one of said rollers (2),said flange (5) extending in a radial direction of said roller (2),said flange (5) having a height (H) above an outer surface (6) of said one of said rollers (2),characterised in that said flange (5) is made of a first material and comprises a wear-resistant structure (8) to protect said flange (5) from wear, wherein said structure is made of a second material, said second material being harder than said first material, and wherein the structure (8)
comprises a feeding structure (8) on the inside of the flange (5) arranged to increase pressure on material towards the gap between the rollers (2). - A roller crusher (1) according to claim 1, wherein said structure (8) extending from the inside of the flange (5) towards the other end (3, 4) of the roller (2).
- A roller crusher (1) according to anyone of the preceding claims, wherein said structure (8) is arcuate.
- A roller crusher (1) according to anyone of the preceding claims, wherein said structure (8) is continuous.
- A roller crusher (1) according to anyone of the preceding claims, wherein said structure (8) is intermittent.
- A roller crusher (1) according to any one of the preceding claims, wherein said flange is made of a first material and said structure is made of a second material, said second material being harder than said first material.
- A roller crusher (1) according to any one of the preceding claims, wherein said flange (5) is divided into a plurality of segments (7).
- A roller crusher (1) according to any one of the preceding claims, wherein said flange (5) is attached to said roller (2) by means of adhesive, bolting, screwing, welding, brazing or any other suitable fastening technique.
- A roller crusher (1) according to any one of the preceding claims, comprising a flange (5) attached to each end (3, 4) of one of said rollers (2), respectively.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK14164193.6T DK2756886T3 (en) | 2012-04-20 | 2012-04-20 | Roll crusher with at least one roller comprising a flange. |
EP17174192.9A EP3248685A2 (en) | 2012-04-20 | 2012-04-20 | Roller crusher having at least one roller comprising a flange |
EP14164193.6A EP2756886B1 (en) | 2012-04-20 | 2012-04-20 | Roller crusher having at least one roller comprising a flange |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20120164950 EP2653229A1 (en) | 2012-04-20 | 2012-04-20 | Roller crusher having at least one roller comprising a flange |
EP14164193.6A EP2756886B1 (en) | 2012-04-20 | 2012-04-20 | Roller crusher having at least one roller comprising a flange |
Related Parent Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20120164950 Division EP2653229A1 (en) | 2012-04-20 | 2012-04-20 | Roller crusher having at least one roller comprising a flange |
EP20120164950 Previously-Filed-Application EP2653229A1 (en) | 2012-04-20 | 2012-04-20 | Roller crusher having at least one roller comprising a flange |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17174192.9A Division EP3248685A2 (en) | 2012-04-20 | 2012-04-20 | Roller crusher having at least one roller comprising a flange |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2756886A2 EP2756886A2 (en) | 2014-07-23 |
EP2756886A3 EP2756886A3 (en) | 2015-06-03 |
EP2756886B1 true EP2756886B1 (en) | 2017-06-07 |
Family
ID=46000964
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20120164950 Withdrawn EP2653229A1 (en) | 2012-04-20 | 2012-04-20 | Roller crusher having at least one roller comprising a flange |
EP14164193.6A Active EP2756886B1 (en) | 2012-04-20 | 2012-04-20 | Roller crusher having at least one roller comprising a flange |
EP17174192.9A Withdrawn EP3248685A2 (en) | 2012-04-20 | 2012-04-20 | Roller crusher having at least one roller comprising a flange |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20120164950 Withdrawn EP2653229A1 (en) | 2012-04-20 | 2012-04-20 | Roller crusher having at least one roller comprising a flange |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17174192.9A Withdrawn EP3248685A2 (en) | 2012-04-20 | 2012-04-20 | Roller crusher having at least one roller comprising a flange |
Country Status (3)
Country | Link |
---|---|
EP (3) | EP2653229A1 (en) |
CN (1) | CN203281336U (en) |
DK (1) | DK2756886T3 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022271579A1 (en) | 2021-06-23 | 2022-12-29 | Metso Outotec USA Inc. | A grinding roll and a grinding assembly comprising the grinding roll |
EP3990190B1 (en) | 2019-06-28 | 2023-05-10 | FLSmidth A/S | Roller mill with border elements and method of adjusting a frontal gap in the roller mill |
US11931745B2 (en) | 2021-06-23 | 2024-03-19 | Metso Outotec USA Inc. | Grinding roll |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107309053A (en) * | 2017-05-11 | 2017-11-03 | 胡逸琴 | A kind of geological exploration ore multiple stage crushing equipment |
CN108283964A (en) * | 2018-03-29 | 2018-07-17 | 郑伟杰 | A kind of roll-type stone crusher with screening function |
DE102018108690A1 (en) | 2018-04-12 | 2019-10-17 | Thyssenkrupp Ag | Grinding roller and roller press |
US11077446B2 (en) * | 2018-10-01 | 2021-08-03 | Metso Outotec USA Inc. | Startup sequence for roller crusher |
CN109847839A (en) * | 2019-02-18 | 2019-06-07 | 沈阳五寰科技有限公司 | A kind of high-pressure roller mill |
CN111923465B (en) * | 2020-08-10 | 2021-11-16 | 山西省农业科学院高寒区作物研究所 | Oat flattening machine |
US20220288598A1 (en) * | 2021-03-10 | 2022-09-15 | Metso Outotec USA Inc. | Spur wheel scraper |
US11938488B2 (en) | 2021-12-09 | 2024-03-26 | Metso Outotec USA Inc. | Roller crusher and method for operation thereof |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE457037C (en) * | 1928-03-06 | Bergedorfer Maschinenfabrik Vo | Rolling mill for processing clay or other pulpy or granular masses with end plates for the roll gap located on the end faces of the rolls | |
US1014383A (en) * | 1911-02-25 | 1912-01-09 | Jeremiah S Frazee | Crushing-rolls. |
US1908519A (en) * | 1928-07-10 | 1933-05-09 | Albert P Leonard | Sugar cane mill |
US3873259A (en) * | 1973-12-07 | 1975-03-25 | United States Steel Corp | Mold segment |
EP0328647B1 (en) * | 1987-04-28 | 1993-11-03 | Nittetsu Mining Co., Ltd. | Roll crusher and method of crushing using the same |
US5054701A (en) * | 1989-06-20 | 1991-10-08 | Fives-Cail Babcock | Milling process and apparatus |
US5253816A (en) * | 1989-07-20 | 1993-10-19 | Krupp Polysius Ag | Material crushing roller construction |
DE4037816A1 (en) * | 1990-11-28 | 1992-06-04 | Kloeckner Humboldt Deutz Ag | Seal for ends of gap between milling rollers - comprises annular ring mounted at roller ends covering both gap and edge of second roller |
DE4132474A1 (en) | 1991-05-28 | 1992-12-03 | Kloeckner Humboldt Deutz Ag | WEAR-RESISTANT GRINDING ROLLER FOR USE IN ROLLING MACHINES, ESPECIALLY IN HIGH PRESSURE ROLLING PRESSES |
DK176624B1 (en) * | 2007-07-25 | 2008-12-01 | Smidth As F L | Rolling press with flexible ring disc sections |
-
2012
- 2012-04-20 EP EP20120164950 patent/EP2653229A1/en not_active Withdrawn
- 2012-04-20 EP EP14164193.6A patent/EP2756886B1/en active Active
- 2012-04-20 DK DK14164193.6T patent/DK2756886T3/en active
- 2012-04-20 EP EP17174192.9A patent/EP3248685A2/en not_active Withdrawn
-
2013
- 2013-04-19 CN CN2013201992838U patent/CN203281336U/en not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3990190B1 (en) | 2019-06-28 | 2023-05-10 | FLSmidth A/S | Roller mill with border elements and method of adjusting a frontal gap in the roller mill |
WO2022271579A1 (en) | 2021-06-23 | 2022-12-29 | Metso Outotec USA Inc. | A 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 |
US11931745B2 (en) | 2021-06-23 | 2024-03-19 | Metso Outotec USA Inc. | Grinding roll |
Also Published As
Publication number | Publication date |
---|---|
EP3248685A2 (en) | 2017-11-29 |
CN203281336U (en) | 2013-11-13 |
DK2756886T3 (en) | 2017-09-25 |
EP2756886A3 (en) | 2015-06-03 |
EP2756886A2 (en) | 2014-07-23 |
EP2653229A1 (en) | 2013-10-23 |
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