EP2054156B1 - Roller mill - Google Patents
Roller mill Download PDFInfo
- Publication number
- EP2054156B1 EP2054156B1 EP07822668.5A EP07822668A EP2054156B1 EP 2054156 B1 EP2054156 B1 EP 2054156B1 EP 07822668 A EP07822668 A EP 07822668A EP 2054156 B1 EP2054156 B1 EP 2054156B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller
- roller mill
- mill
- smaller
- section
- 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.)
- Expired - Fee Related
Links
- 239000000463 material Substances 0.000 claims description 42
- 238000000034 method Methods 0.000 claims description 7
- 238000007873 sieving Methods 0.000 claims 7
- 238000003801 milling Methods 0.000 claims 6
- 238000012216 screening Methods 0.000 description 12
- 238000005549 size reduction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000010951 particle size reduction Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005096 rolling process Methods 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
Definitions
- the in the Fig. 1 and Fig. 2 illustrated roller mill 1 has two rotatably mounted, oppositely rotating rollers 2, 3, which form a nip between them.
- the two rollers 2, 3 each have a first and a second region 2a, 2b and 3a, 3b, which have different diameters D 1 , D 2 , so that the roller mill a section A with a smaller nip s 1 and a section B having a larger nip s 2 .
- the width b B of the section B with the larger nip s 2 is between 20 and 40% of the width b A of the section A with the smaller nip s. 1
- the larger nip s 2 is 1 to 3 times larger than the smaller nip s 1 .
- the grinding plant according to the Fig. 5 illustrated embodiment may be modified.
- the screen 6 has only a first discharge opening 6a for the coarse material 7 and a second discharge opening 6b for the fine material 8.
- the coarse material 7 is fed to a crusher 12, the discharge 13 is fed together with fresh material 10 via the entry port 6 d of the sieve 6.
- the fine material 8 of the screening device 6 discharged via the second discharge opening 6b is fed to the section B with the larger nip. There again a single grain shredding takes place.
- the comminuted material 14 of section B is then fed to section A of the roller mill with the smaller nip and exposed there to a comminution.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Description
Die Erfindung betrifft ein Verfahren zum Zerkleinern von Mahlgut mit einer Walzenmühle mit zwei drehbar gelagerten, gegensinnig umlaufenden Walzen, die zwischen sich einen Walzenspalt ausbilden.The invention relates to a method for comminuting regrind with a roll mill with two rotatably mounted, oppositely rotating rollers which form a nip between them.
Wird eine derartige Walzenmühle zur Gutbettzerkleinerung eingesetzt, ist das maximale Aufgabekorn im Wesentlichen durch die Geometrie der Walzen limitiert. Bei derzeit verwendeten Walzendurchmessern von 2,4 m ergibt sich dabei ein maximales Kornband von 50-70 mm. Das Aufgabegut hat jedoch teilweise eine Korngröße von mehr als 200 mm. Es ist daher erforderlich, das Aufgabegut in Primärbrechern, Sekundärbrechern und Tertiärbrechern einer Vorzerkleinerung zu zuführen.If such a roll mill is used for comminution grinding, the maximum feed grain is essentially limited by the geometry of the rolls. At currently used roll diameters of 2.4 m results in a maximum grain size of 50-70 mm. However, the feed has partially a grain size of more than 200 mm. It is therefore necessary to feed the feed into primary crushers, secondary crushers and tertiary crushers for pre-shredding.
Aus der
Der Erfindung liegt die Aufgabe zugrunde, den Aufwand für die Vorzerkleinerung zu reduzieren.The invention has for its object to reduce the cost of pre-shredding.
Erfindungsgemäß wird diese Aufgabe durch die Merkmale des Anspruchs 1 gelöst.According to the invention, this object is solved by the features of
Die bei der Erfindung zur Anwendung kommende Walzenmühle weist zwei drehbar gelagerte, gegensinnig umlaufende Walzen auf, die zwischen sich einen Walzenspalt ausbilden. Bei den beiden Walzen ist jeweils wenigstens ein erster und ein zweiter Bereich vorgesehen, die unterschiedliche Durchmesser haben, sodass die Walzenmühle wenigstens einen Abschnitt mit einem kleineren Walzenspalt und mindestens einen Abschnitt mit einem größeren Walzenspalt aufweist.The rolling mill used in the invention has two rotatably mounted, oppositely rotating rollers which form a nip between them. In the case of the two rollers, in each case at least one first and one second region are provided, which have different diameters, so that the Roll mill having at least a portion with a smaller nip and at least a portion with a larger nip.
Das erfindungsgemäße Verfahren zum Zerkleinern von Mahlgut verwendet die oben beschriebene Walzenmühle, wobei im Abschnitt der Walzenmühle mit dem größeren Walzenspalt eine Einzelkornzerkleinerung und im Abschnitt der Walzenmühle mit dem kleineren Walzenspalt eine Gutbettzerkleinerung durchgeführt wird.The method according to the invention for comminuting regrind uses the above-described roller mill, in which section of the roller mill with the larger nip a single-particle comminution and in the section of the roller mill with the smaller nip a comminuted bed comminution are carried out.
Auf diese Weise kann zumindest ein Teil der Vorzerkleinerung und die Gutbettzerkleinerung in einem Aggregat durchgeführt werden. Dadurch reduzieren sich die Kosten für die Zerkleinerung des Mahlgutes sowohl im Bereich der Anschaffungskosten als auch im Bereich der laufenden Betriebskosten.In this way, at least part of the pre-crushing and the Gutbettzerkleinerung can be performed in an aggregate. This reduces the costs for comminution of the material to be ground, both in terms of acquisition costs and in terms of ongoing operating costs.
Weitere Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Further embodiments of the invention are the subject of the dependent claims.
Weiterhin kann vorgesehen werden, dass das zu zerkleinernde Mahlgut zunächst gesiebt wird und anschließend das Grobgut der Siebung dem Abschnitt der Walzenmühle mit dem größeren Walzenspalt und das Feingut der Siebung dem Abschnitt der Walzenmühle mit dem kleineren Walzenspalt zugeführt wird. Das zerkleinerte Mahlgut des Abschnitts der Walzenmühle mit dem größeren Walzenspalt wird entweder noch mal der Siebung oder dem Abschnitt der Walzenmühle mit dem kleineren Walzenspalt zugeführt.Furthermore, it can be provided that the grinding stock to be comminuted is first screened and then the coarse material of the screening of the section of the roll mill with the larger nip and the fines of the screening Section of the roller mill with the smaller nip is supplied. The comminuted millbase of the section of the roll mill with the larger nip is fed either again to the screening or to the section of the mill with the smaller nip.
Das zerkleinernde Mahlgut des Abschnitts der Walzenmühle mit dem kleineren Walzenspalt kann entweder gesiebt oder als Fertiggut abgeführt werden.The comminuting regrind of the section of the roll mill with the smaller nip can either be screened or removed as finished product.
In einer anderen Ausgestaltung wird das zu zerkleinernde Mahlgut zunächst gesiebt, wobei das Feingut der Siebung dem Abschnitt der Walzenmühle mit dem größeren Walzenspalt und das Grobgut der Siebung einem zusätzlichen Brecher zugeführt wird.In another embodiment, the grinding stock to be comminuted is first sieved, the fine material of the screening being fed to the section of the roll mill with the larger nip and the coarse material of the screening to an additional breaker.
Gemäß einer weiteren Ausführungsform wird das zerkleinerte Gut aus dem Abschnitt der Walzenmühle mit dem kleineren Walzenspalt gesiebt, wobei das Grobgut der Siebung dem Abschnitt der Walzenmühle mit dem kleineren Walzenspalt und das Feingut der Siebung als Fertiggut abgeführt wird.According to a further embodiment, the comminuted material is screened from the section of the roller mill with the smaller nip, wherein the coarse material of the screening is discharged to the section of the roller mill with the smaller nip and the fine material of the screening as finished product.
Weitere Vorteile und Ausgestaltungen der Erfindung werden im Folgenden anhand der Beschreibung einiger Ausführungsbeispiele und der Zeichnung näher erläutert.Further advantages and embodiments of the invention will be explained in more detail below with reference to the description of some embodiments and the drawings.
In der Zeichnung zeigen
- Fig. 1
- eine schematische Draufsicht auf die Walzen der Walzenmühle gemäß einem ersten Ausführungsbeispiel,
- Fig. 2
- eine schematische Seitenansicht der Walzenmühle,
- Fig. 3
- ein Flussschaltbild einer Mahlanlage gemäß einem ersten Ausführungsbeispiel,
- Fig. 4
- ein Flussschaltbild einer Mahlanlage gemäß einem zweiten Ausführungsbeispiel,
- Fig. 5
- ein Flussschaltbild einer Mahlanlage gemäß einem dritten Ausführungsbeispiel und
- Fig. 6
- eine schematische Draufsicht auf die Walzen der Walzenmühle gemäß einem zweiten Ausführungsbeispiel.
- Fig. 1
- a schematic plan view of the rolls of the roll mill according to a first embodiment,
- Fig. 2
- a schematic side view of the roll mill,
- Fig. 3
- a flow diagram of a grinding plant according to a first embodiment,
- Fig. 4
- a flow diagram of a grinding plant according to a second embodiment,
- Fig. 5
- a flow diagram of a grinding plant according to a third embodiment and
- Fig. 6
- a schematic plan view of the rollers of the roller mill according to a second embodiment.
Die in den
Mit einer derartigen Dimensionierung der Durchmesser der beiden Walzen kann beispielsweise bei einem Walzenspalt s2 von 45 mm ein Aufgabekorn von 140-225 mm zerkleinert werden. Die Breite der beiden Abschnitte bestimmt sich vor allem durch die Massenströme.With such a dimensioning of the diameter of the two rolls, for example, at a nip s 2 of 45 mm, a feed grain of 140-225 mm can be comminuted. The width of the two sections is determined primarily by the mass flows.
Mit Hilfe der oben beschriebenen Walzenmühle kann die Anzahl der für die Vorzerkleinerung erforderlichen Brecher reduziert werden. Bei entsprechender Dimensionierung kann auf etwaige Vorbrecher sogar völlig verzichtet werden. Dadurch wird nicht nur der Maschinenaufwand deutlich reduziert, sondern es können auch erhebliche Einsparungen beim Energieverbrauch erreicht werden.With the help of the above-described roller mill, the number of crushers required for pre-crushing can be reduced. With appropriate dimensioning can be dispensed with any pre-breaker even completely. As a result, not only the machine cost is significantly reduced, but it can also be achieved significant savings in energy consumption.
Mit einer derartigen Walzenmühle kann im Abschnitt B der Walzenmühle mit dem größeren Walzenspalt eine Einzelkornzerkleinerung und im Abschnitt A der Walzenmühle mit dem kleineren Walzenspalt eine Gutbettzerkleinerung durchgeführt werden. Dies setzt natürlich voraus, dass die Walzenmühle zwei voneinander getrennte Zuführschächte 4, 5 aufweist.With a roll mill of this kind, single-particle size reduction can be carried out in section B of the roll mill with the larger nip, and fine-particle size reduction in section A of the roll mill with the smaller nip. This assumes, of course, that the roll mill has two
Jede der beiden Walzen 2, 3 ist in allgemein bekannter Art und Weise gelagert. Hierbei ist üblicherweise eine Walze als Festwalze und die andere Loswalze ausgebildet. Außerdem sind ein entsprechender Antrieb sowie eine Anpressvorrichtung vorgesehen.Each of the two
Das Grobgut 7 der Siebung wird dem Abschnitt B mit dem größeren Walzenspalt zugeführt, in dem eine Einzelkornzerkleinerung stattfindet. Das Feingut 8 der Siebung gelangt in dem Abschnitt A mit dem kleineren Walzenspalt und wird dort einer Gutbettzerkleinerung unterzogen. Das Austragsgut der beiden Abschnitte A, B der Walzenmühle 1 wird als Rückgut 11 wieder über die Eintragsöffnung 6d dem Sieb 6 zugeführt.The
Bei dem in
Für den Fall, dass der Walzenspalt des Abschnitts B der Walzenmühle 1 für das Frischgut nicht groß genug ist, kann die Mahlanlage gemäß dem in
Das zerkleinerte Mahlgut 15 des Abschnitts A der Walzenmühle mit dem kleineren Walzenspalt wird entweder einem Sieb 16 (gestrichelt dargestellt) zugeführt oder als Fertiggut 15 abgeführt. Wird das Gut dem Sieb 16 zugeführt, wird dessen grobes Gut wiederum dem Abschnitt A der Walzenmühle mit dem kleineren Walzenspalt zugeführt und dessen Feingut als Fertiggut abgeführt.The comminuted material to be ground 15 of the section A of the roller mill with the smaller nip is either a sieve 16 (shown in phantom) supplied or discharged as
Im Rahmen der Erfindung sind selbstverständlich auch andere Schaltungen denkbar, die insbesondere durch eine Kombination der oben beschriebenen Schaltungen erhalten werden können.In the context of the invention, of course, other circuits are conceivable, which can be obtained in particular by a combination of the circuits described above.
Anstelle der in
Claims (5)
- Method for comminuting milling material having a roller mill (1) having two rotatably supported, counter-rotating rollers (2, 3) which together form a roller gap, with there being provided in each of the two rollers (2, 3) at least a first and a second region which have different diameters (D1, D2) so that the roller mill has at least a portion (A) having a smaller roller gap (s1) and at least a portion (B) having a larger roller gap (s2), with at least a portion of the milling material to be comminuted first being supplied to the portion (B) of the roller mill having the larger roller gap and subsequently being supplied at least partially to the portion (A) of the roller mill (1) having the smaller roller gap, characterised in that individual grain comminution is carried out in the portion (B) of the roller mill (1) having the larger roller gap and material bed comminution is carried out in the portion (A) of the roller mill (1) having the smaller roller gap.
- Method according to claim 1, characterised in that the milling material to be comminuted is first sieved and subsequently the coarse material (7) from the sieving operation is supplied to the portion (B) of the roller mill (1) having the larger roller gap and the fine material (8) from the sieving operation is supplied to the portion (A) of the roller mill (1) having the smaller roller gap, and the comminuted milling material (14, 11) of the portion (B) of the roller mill having the larger roller gap is either supplied to the sieving operation again or to the portion (A) of the roller mill (1) having the smaller roller gap.
- Method according to claim 2, characterised in that the comminuted milling material of the portion (A) of the roller mill (1) having the smaller roller gap is either sieved or is conveyed away as finished material (15).
- Method according to claim 1, characterised in that the milling material to be comminuted is first sieved, with the fine material (8) from the sieving operation being supplied to the portion (B) of the roller mill (1) having the larger roller gap and the coarse material (7) from the sieving operation being supplied to an additional crusher (12).
- Method according to one or more of claims 1 to 4, characterised in that the comminuted material of the portion (A) of the roller mill (1) having the smaller roller gap is sieved, with the coarse material from the sieving operation again being conveyed away from the portion of the roller mill (A) having the smaller roller gap and the fine material from the sieving operation being conveyed away as finished material.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006054598A DE102006054598A1 (en) | 2006-11-20 | 2006-11-20 | rolling mill |
PCT/EP2007/062450 WO2008061941A1 (en) | 2006-11-20 | 2007-11-16 | Roller mill |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2054156A1 EP2054156A1 (en) | 2009-05-06 |
EP2054156B1 true EP2054156B1 (en) | 2014-03-05 |
Family
ID=38858940
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07822668.5A Expired - Fee Related EP2054156B1 (en) | 2006-11-20 | 2007-11-16 | Roller mill |
Country Status (11)
Country | Link |
---|---|
US (1) | US20100032506A1 (en) |
EP (1) | EP2054156B1 (en) |
AU (1) | AU2007324566B2 (en) |
BR (1) | BRPI0719864A8 (en) |
CA (1) | CA2665025A1 (en) |
DE (1) | DE102006054598A1 (en) |
DK (1) | DK2054156T3 (en) |
MX (1) | MX2009003847A (en) |
RU (1) | RU2454279C2 (en) |
WO (1) | WO2008061941A1 (en) |
ZA (1) | ZA200901599B (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101678625B1 (en) | 2008-07-02 | 2016-11-23 | 뷔흘러 에이지 | Apparatus and method for producing flour and/or semolina |
AT515361A1 (en) * | 2014-01-27 | 2015-08-15 | Feiba Engineering & Plants Gmbh | Roller mill, in particular for comminution of dry ice pellets |
NL2013781B1 (en) * | 2014-11-12 | 2016-10-07 | Ds Tags Ip B V | A method of transmitting data, a mobile electronic device, an electronic token, a software services platform and a computer program product. |
US10857539B2 (en) | 2018-10-17 | 2020-12-08 | General Mills Inc. | Apparatus and method for variable sizing of particulates |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US376712A (en) * | 1888-01-17 | Machine for splitting grain | ||
US1044832A (en) * | 1912-06-13 | 1912-11-19 | Enos A Wall | Ore-crusher. |
US2325719A (en) * | 1940-03-29 | 1943-08-03 | Jr Herbert Turner | Reduction crusher |
CA1075658A (en) * | 1976-11-17 | 1980-04-15 | George P. Keil | Roller mill |
DE3719251A1 (en) * | 1987-06-10 | 1988-12-22 | Kloeckner Humboldt Deutz Ag | METHOD AND SYSTEM FOR CONTINUOUS PRESSURE REDUCTION OF SPROEDEN GROSSGUTES |
DE3919416C2 (en) * | 1989-06-14 | 1994-12-01 | Kloeckner Humboldt Deutz Ag | Plant for comminuting or grinding at least two brittle good material components that can be ground differently |
RU2010604C1 (en) * | 1990-08-07 | 1994-04-15 | Горбенко Анатолий Иванович | Crusher |
US6634577B2 (en) * | 2000-12-20 | 2003-10-21 | Tsukuba Food Science, Inc. | Crusher, process for preparing and testing materials and apparatus therefor |
-
2006
- 2006-11-20 DE DE102006054598A patent/DE102006054598A1/en not_active Withdrawn
-
2007
- 2007-11-16 EP EP07822668.5A patent/EP2054156B1/en not_active Expired - Fee Related
- 2007-11-16 WO PCT/EP2007/062450 patent/WO2008061941A1/en active Application Filing
- 2007-11-16 RU RU2009123472/13A patent/RU2454279C2/en not_active IP Right Cessation
- 2007-11-16 AU AU2007324566A patent/AU2007324566B2/en not_active Ceased
- 2007-11-16 US US12/446,845 patent/US20100032506A1/en not_active Abandoned
- 2007-11-16 CA CA002665025A patent/CA2665025A1/en not_active Abandoned
- 2007-11-16 BR BRPI0719864A patent/BRPI0719864A8/en not_active Application Discontinuation
- 2007-11-16 DK DK07822668.5T patent/DK2054156T3/en active
- 2007-11-16 MX MX2009003847A patent/MX2009003847A/en unknown
-
2009
- 2009-03-05 ZA ZA2009/01599A patent/ZA200901599B/en unknown
Also Published As
Publication number | Publication date |
---|---|
BRPI0719864A8 (en) | 2015-04-28 |
RU2454279C2 (en) | 2012-06-27 |
DE102006054598A1 (en) | 2008-05-21 |
AU2007324566A1 (en) | 2008-05-29 |
AU2007324566A2 (en) | 2009-06-25 |
DK2054156T3 (en) | 2014-05-26 |
ZA200901599B (en) | 2010-02-24 |
CA2665025A1 (en) | 2008-05-29 |
EP2054156A1 (en) | 2009-05-06 |
US20100032506A1 (en) | 2010-02-11 |
BRPI0719864A2 (en) | 2014-06-03 |
AU2007324566B2 (en) | 2011-09-15 |
WO2008061941A1 (en) | 2008-05-29 |
MX2009003847A (en) | 2009-04-23 |
RU2009123472A (en) | 2010-12-27 |
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