EP2032260B1 - Roll mill - Google Patents

Roll mill Download PDF

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Publication number
EP2032260B1
EP2032260B1 EP07730281A EP07730281A EP2032260B1 EP 2032260 B1 EP2032260 B1 EP 2032260B1 EP 07730281 A EP07730281 A EP 07730281A EP 07730281 A EP07730281 A EP 07730281A EP 2032260 B1 EP2032260 B1 EP 2032260B1
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EP
European Patent Office
Prior art keywords
grinding
edge
roller
impounding
roller mill
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Expired - Fee Related
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EP07730281A
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German (de)
French (fr)
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EP2032260A1 (en
Inventor
Christian Neumann
Franz-Josef Zurhove
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ThyssenKrupp Industrial Solutions AG
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ThyssenKrupp Polysius AG
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    • 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
    • B02C15/04—Mills with pressed pendularly-mounted rollers, e.g. spring pressed

Definitions

  • the invention relates to a roller mill with a grinding table and at least one rolling on the grinding table grinding roller, wherein to be comminuted millbase is derived after the stress in a gap formed between grinding plate and grinding roller over the edge of the grinding table.
  • the mill In order to achieve high throughputs with low mass-related labor requirements, the mill must be operated either with the highest possible grinding table speed or with a smaller distance between the grinding rollers - ie with a larger number of grinding rollers.
  • the smoothness of the roller mill is to be regarded as limiting here. So that the ground material can not escape from the gap between grinding plate and grinding roller during the grinding process and thus is optimally stressed, usually a so-called jam is provided.
  • a roller mill according to the preamble of claim 1 with three grinding rollers is known, wherein in each case between two grinding rollers in the region of the grinding path a locking device is provided to stop the material to be ground on its way from the center to the edge of the grinding table. In this way, it is to be prevented that regrind leaves the plate without being crushed. Due to the blocking edge, a very high grinding bed is formed in the region of the grinding path, which increases the grinding capacity and improves the running smoothness of the mill. The way to the outside of the plate is then only possible in the field of grinding rollers.
  • this locking device has the disadvantages that it has no influence on the escape of the ground material from the grinding gap and that the roll width is not applied uniformly and completely with regrind and thus does not contribute to the crushing.
  • a stationary arranged stowage wall is provided, which leads in the direction of rotation of the grinding table to the grinding gap of a grinding roller and whose height allows a flow around the ground material-gas mixture at least at its upper edge.
  • This baffle wall has the effect of a coarse Vorsichtung, because the air flow around the finer parts lead because of their greater levitation capacity around the baffle up and down, while the coarser portions are deflected and fed back to the shortest route to the grinding. In this way, the repeated overrolling of the goods should be eliminated with finer proportions.
  • From the JP 05 007 786 A is a vertical mill with a non-co-rotating with the grinding table, stationary jamming edge, wherein the jamming edge extends over the entire circumference of Mahltellerrandes.
  • the invention is based on the object to further develop the roller mill to the effect that higher throughputs can be achieved with low mass-related work needs.
  • the roller mill according to the invention has a grinding plate and at least one rolling on the plate grinding roller, to be comminuted millbase is derived after the stress in a gap formed between the grinding plate and grinding roller over the edge of the grinding plate and further provided with a non-co-rotating with the grinding table, stationary jamming edge is, which is provided at least on the edge of the grinding plate facing side of the grinding roller and forms at least a part of an increase of the edge of the grinding plate.
  • the increase in the edge of the grinding plate is higher in the region of the grinding rollers than in the region between the grinding rollers, in order to prevent a radial escape of the material to be ground from the gap formed between the grinding plate and the grinding roller.
  • the material to be ground against the in the DE-A-36 42 814 revealed do not escape from the grinding gap in the field of grinding rollers, but are only exposed to a full load through the grinding rollers.
  • the discharge of the finished ground material then takes place only in a range between the grinding material just crushing the grinding roller and the next grinding roller. Due to the fact that no or hardly any ground material can escape in the area of the grinding rollers, an optimal load is guaranteed.
  • the shredded material should leave the plate as quickly as possible and be fed to the sighting. It is known that fine fractions adversely affect the stability of the grinding bed and lead to vibrations.
  • the physical relationship between available residence time between two comminution processes with the centrifugal forces and the plate contour including a co-rotating stagnation edge and the flow behavior of the ground material results in the trajectories of the particles and thus the proportion of already used material leaving the plate and the proportion of the following crushing is supplied.
  • the residence time and the centrifugal forces are determined by the distance and the radial position of the grinding rollers and the speed of the plate.
  • the flow properties of the regrind are primarily dependent on the type (grain, mineralogy, etc.), the fineness and moisture and can only be influenced to a limited extent.
  • the height of the jammed edge has a strong influence on the railway lines.
  • the storage edge must have variable heights over the circumference. In this way, higher speeds of the grinding table and thus higher throughput rates are possible.
  • the storage edge is adjustable in the radial and / or vertical direction.
  • the jamming edge can have different heights over their length;
  • roller mill consists essentially of a grinding table 1 and at least one rolling on the grinding table grinding roller 2. In the illustrated embodiment, four grinding rollers 2 are shown. In the context of the invention, but it would also be conceivable, for example, to provide a roller mill with two or six grinding rollers.
  • the grinding table 1 is rotatably driven about a vertical axis 1a.
  • the grinding rollers 2 rest with their own weight on the grinding table 1 or can be acted upon by a suitable device with an additional contact force.
  • the millbase to be comminuted is fed centrally via a feed device 3 on the rotating grinding table 1 and passes from there by centrifugal force to the outside and is detected by the grinding rollers 2.
  • the actual crushing work takes place in the gap between the grinding roller 2 and the grinding table 1.
  • a grinding wheel not co-rotating with the grinding plate i. stationary arranged Staukante 4 provided.
  • the storage edge 4 can be adjustable by suitable means both in the radial direction (double arrow 5) and in the vertical direction (double arrow 6).
  • a provided at the outer edge 1a, with the grinding table 1 co-rotating stop ring 7 is provided.
  • additional, known from practice Stauringerhöhungen be provided. It is also conceivable that the storage edge has different heights over its length in the circumferential direction of the grinding table 1.
  • Fig. 3 shows a somewhat more detailed plan view of the roller mill, from which in particular a conceivable form of the stationary edge of the jam 4 emerges.
  • the adjacent area 4a of the stopping edge 4 is formed essentially parallel to the grinding roller.
  • the front in the direction of rotation 9 of the grinding plate 1 area 4b of the Staukante is slightly bent or bent and follows approximately the contour of Mahltellerrandes 1b.
  • the sufficiently comminuted regrind passes further outward by centrifugal force and is discharged via the edge 1b of the grinding table or via the storage ring 7. Due to the increased congestion in the area of Grinding roller 2 ensures that the material to be ground is subjected to sufficient comminution by the grinding roller before it is discharged over the edge of the grinding table 1. In addition, it is ensured by the much lower storage ring 7 or possibly not provided at all Stauring that in particular the fine material is discharged before it is rolled over again. This has a positive effect on the smoothness of the machine, so that higher speeds of the grinding table 1 can be driven and thus a higher throughput is achieved.

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

Abstract

The invention relates to a roll mill having a grinding plate and at least one grinding roll rolling on the grinding plate, wherein material which is to be comminuted, after being subjected to loading in a gap formed between the grinding plate and grinding roll, is directed away over the periphery of the grinding plate and, furthermore, a stationary accumulating edge, which does not rotate along with the grinding plate, is provided, at least on that side of the grinding roll which is directed towards the periphery of the grinding plate, this accumulating edge forming at least part of an elevation of the periphery of the grinding plate. The elevation of the periphery of the grinding plate here is higher in the region of the grinding rolls than in the region between the grinding rolls, in order to prevent the material which is to be comminuted from escaping radially from the gap formed between the grinding plate and grinding roll.

Description

Die Erfindung betrifft eine Rollenmühle mit einem Mahlteller und wenigstens einer auf dem Mahlteller abrollenden Mahlrolle, wobei zu zerkleinerndes Mahlgut nach der Beanspruchung in einem zwischen Mahlteller und Mahlrolle gebildeten Spalt über den Rand des Mahltellers abgeleitet wird.The invention relates to a roller mill with a grinding table and at least one rolling on the grinding table grinding roller, wherein to be comminuted millbase is derived after the stress in a gap formed between grinding plate and grinding roller over the edge of the grinding table.

Um hohe Durchsatzleistungen mit niedrigem massenbezogenen Arbeitsbedarf erreichen zu können, muss die Mühle entweder mit einer möglichst hohen Mahltellerdrehzahl oder mit einem geringeren Abstand zwischen den Mahlrollen - also mit einer größeren Mahlrollenzahl - betrieben werden. Die Laufruhe der Rollenmühle ist hier als limitierend anzusehen. Damit das Mahlgut während des Mahlvorganges nicht aus dem Spalt zwischen Mahlteller und Mahlrolle entweichen kann und somit optimal beansprucht wird, ist üblicherweise ein so genannter Stauring vorgesehen.In order to achieve high throughputs with low mass-related labor requirements, the mill must be operated either with the highest possible grinding table speed or with a smaller distance between the grinding rollers - ie with a larger number of grinding rollers. The smoothness of the roller mill is to be regarded as limiting here. So that the ground material can not escape from the gap between grinding plate and grinding roller during the grinding process and thus is optimally stressed, usually a so-called jam is provided.

Aus der DE-A-36 42 814 ist eine Rollenmühle gemäß dem Oberbegriff des Anspruchs 1 mit drei Mahlwalzen bekannt, wobei jeweils zwischen zwei Mahlwalzen im Bereich der Mahlbahn eine Sperrvorrichtung vorgesehen ist, um das Mahlgut auf seinem Weg vom Zentrum zum Rand des Mahltellers anzuhalten. Auf diese Weise soll verhindert werden, dass Mahlgut ohne dass es zerkleinert wird den Teller verlässt. Durch die Sperrkante bildet sich im Bereich der Mahlbahn ein sehr hohes Mahlbett aus, wodurch die Mahlleistung erhöht und die Laufruhe der Mühle verbessert werden soll. Der Weg nach außen zum Tellerrand ist dann nur noch im Bereich der Mahlwalzen möglich. Diese Sperrvorrichtung hat allerdings die Nachteile, dass sie keinen Einfluss auf das Entweichen des Mahlguts aus dem Mahlspalt hat und dass die Rollenbreite nicht gleichmäßig und vollständig mit Mahlgut beaufschlagt wird und somit nicht zur Zerkleinerung beiträgt.From the DE-A-36 42 814 a roller mill according to the preamble of claim 1 with three grinding rollers is known, wherein in each case between two grinding rollers in the region of the grinding path a locking device is provided to stop the material to be ground on its way from the center to the edge of the grinding table. In this way, it is to be prevented that regrind leaves the plate without being crushed. Due to the blocking edge, a very high grinding bed is formed in the region of the grinding path, which increases the grinding capacity and improves the running smoothness of the mill. The way to the outside of the plate is then only possible in the field of grinding rollers. However, this locking device has the disadvantages that it has no influence on the escape of the ground material from the grinding gap and that the roll width is not applied uniformly and completely with regrind and thus does not contribute to the crushing.

In der DE-A-1 507 579 wird einer Rollenquetschmühle beschrieben, bei der zwischen den beiden Mahlrollen ebenfalls eine stationär angeordnete Stauwand vorgesehen ist, die in Drehrichtung des Mahltellers bis zum Mahlspalt einer Mahlrolle führt und deren Höhe ein Umströmen des Mahlgut-Gas-Gemisches zumindest an ihrer Oberkante ermöglicht. Diese Stauwand hat die Wirkung einer groben Vorsichtung, weil der Luftstrom die feineren Anteile wegen ihres größeren Schwebevermögen um die Stauwand oben und unten herumführt, während die gröberen Anteile abgelenkt und auf dem kürzesten Wege der Vermahlung wieder zugeführt werden. Auf diese Weise soll die wiederholte Überrollung des Gutes mit feineren Anteilen beseitigt werden.In the DE-A-1 507 579 is a Rollenquetschmühle described in the between the two grinding rollers also a stationary arranged stowage wall is provided, which leads in the direction of rotation of the grinding table to the grinding gap of a grinding roller and whose height allows a flow around the ground material-gas mixture at least at its upper edge. This baffle wall has the effect of a coarse Vorsichtung, because the air flow around the finer parts lead because of their greater levitation capacity around the baffle up and down, while the coarser portions are deflected and fed back to the shortest route to the grinding. In this way, the repeated overrolling of the goods should be eliminated with finer proportions.

Aus der JP 05 007 786 A ist eine Vertikalmühle mit einer nicht mit dem Mahlteller mitrotierenden, stationären Staukante bekannt, wobei sich die Staukante über den gesamten Umfang des Mahltellerrandes erstreckt.From the JP 05 007 786 A is a vertical mill with a non-co-rotating with the grinding table, stationary jamming edge, wherein the jamming edge extends over the entire circumference of Mahltellerrandes.

Der Erfindung liegt nun die Aufgabe zugrunde, die Rollenmühle dahingehend weiterzuentwickeln, dass höhere Durchsatzleistungen mit niedrigem massenbezogenen Arbeitsbedarf erreicht werden können.The invention is based on the object to further develop the roller mill to the effect that higher throughputs can be achieved with low mass-related work needs.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale des Anspruches 1 gelöst.According to the invention, this object is solved by the features of claim 1.

Die erfindungsgemäße Rollenmühle weist einen Mahlteller und wenigstens eine auf dem Teller abrollende Mahlrolle auf, wobei zu zerkleinerndes Mahlgut nach der Beanspruchung in einem zwischen Mahlteller und Mahlrolle gebildeten Spalt über den Rand des Mahltellers abgeleitet wird und ferner eine nicht mit dem Mahlteller mitrotierende, stationäre Staukante vorgesehen ist, die zumindest auf der dem Rand des Mahltellers zugewandten Seite der Mahlrolle vorgesehen ist und die wenigstens ein Teil einer Erhöhung des Randes des Mahltellers bildet. Die Erhöhung des Randes des Mahltellers ist dabei im Bereich der Mahlrollen höher als im Bereich zwischen den Mahlrollen ausgebildet ist, um ein radiales Entweichen des Mahlgutes aus dem zwischen Mahlteller und Mahlrolle gebildeten Spalt zu verhindern.The roller mill according to the invention has a grinding plate and at least one rolling on the plate grinding roller, to be comminuted millbase is derived after the stress in a gap formed between the grinding plate and grinding roller over the edge of the grinding plate and further provided with a non-co-rotating with the grinding table, stationary jamming edge is, which is provided at least on the edge of the grinding plate facing side of the grinding roller and forms at least a part of an increase of the edge of the grinding plate. The increase in the edge of the grinding plate is higher in the region of the grinding rollers than in the region between the grinding rollers, in order to prevent a radial escape of the material to be ground from the gap formed between the grinding plate and the grinding roller.

Bei der erfindungsgemäßen Rollenmühle soll das Mahlgut entgegen der in der DE-A-36 42 814 offenbarten Lehre nicht im Bereich der Mahlrollen aus dem Mahlspalt entweichen, sondern erst einer vollständigen Beanspruchung durch die Mahlrollen ausgesetzt werden. Der Austrag des fertiggemahlenen Mahlgutes erfolgt dann erst in einem Bereich zwischen der das Mahlgut gerade zerkleinernden Mahlrolle und der nächsten Mahlrolle. Dadurch, dass kein bzw. kaum Mahlgut im Bereich der Mahlrollen entweichen kann, wird eine optimale Beanspruchung gewährleistet.In the roller mill according to the invention, the material to be ground against the in the DE-A-36 42 814 revealed do not escape from the grinding gap in the field of grinding rollers, but are only exposed to a full load through the grinding rollers. The discharge of the finished ground material then takes place only in a range between the grinding material just crushing the grinding roller and the next grinding roller. Due to the fact that no or hardly any ground material can escape in the area of the grinding rollers, an optimal load is guaranteed.

Nach der Beanspruchung soll das zerkleinerte Material möglichst schnell den Teller verlassen und der Sichtung zugeführt werden. Es ist bekannt, dass feine Anteile die Stabilität des Mahlbetts negativ beeinflussen und zu Vibrationen führen. Durch den physikalischen Zusammenhang von verfügbarer Verweilzeit zwischen zwei Zerkleinerungsvorgängen mit den Zentrifugalkräften und der Tellerkontur einschließlich einer mitrotierenden Staukante sowie dem Fließverhalten des Mahlguts ergeben sich die Bahnkurven der Partikel und somit der Anteil des bereits beanspruchten Guts, der den Teller verlässt und der Anteil, der der folgenden Zerkleinerung zugeführt wird. Die Verweilzeit und die Zentrifugalkräfte werden durch den Abstand und die radiale Position der Mahlrollen und die Drehzahl des Tellers festgelegt. Die Fließeigenschaften des Mahlguts sind primär abhängig vom Typ (Körnung, Mineralogie, etc.), der Feinheit und Feuchte und können nur begrenzt beeinflusst werden. Die Höhe der Staukante hat einen starken Einfluss auf die Bahnlinien. Um einerseits ein seitliches Entweichen aus der Zerkleinerungszone zu verhindern und andererseits ein schnelles Abfließen von der Mahlbahn zu erzielen, muss die Staukante über den Umfang veränderliche Höhen aufweisen. Auf diese Weise sind höhere Drehzahlen des Mahltellers und damit auch höhere Durchsatzleistungen möglich.After the stress, the shredded material should leave the plate as quickly as possible and be fed to the sighting. It is known that fine fractions adversely affect the stability of the grinding bed and lead to vibrations. The physical relationship between available residence time between two comminution processes with the centrifugal forces and the plate contour including a co-rotating stagnation edge and the flow behavior of the ground material results in the trajectories of the particles and thus the proportion of already used material leaving the plate and the proportion of the following crushing is supplied. The residence time and the centrifugal forces are determined by the distance and the radial position of the grinding rollers and the speed of the plate. The flow properties of the regrind are primarily dependent on the type (grain, mineralogy, etc.), the fineness and moisture and can only be influenced to a limited extent. The height of the jammed edge has a strong influence on the railway lines. On the one hand to prevent lateral escape from the crushing zone and on the other hand to achieve a rapid flow from the grinding path, the storage edge must have variable heights over the circumference. In this way, higher speeds of the grinding table and thus higher throughput rates are possible.

Weitere Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Further embodiments of the invention are the subject of the dependent claims.

Gemäß einem bevorzugten Ausführungsbeispiel ist die Staukante in radialer und/oder vertikaler Richtung verstellbar. Auch kann die Staukante über ihre Länge unterschiedliche Höhen aufweisen;According to a preferred embodiment, the storage edge is adjustable in the radial and / or vertical direction. Also, the jamming edge can have different heights over their length;

Weiterhin ist denkbar, dass im Bereich des Randes des Mahltellers ein mit dem Mahlteller mitrotierender Stauring vorgesehen ist. In diesem Fall wird die Staukante im Bereich der Mahlrolle höher als der Stauring ausgebildet sein. Dadurch kann einerseits ein Mahlgutbett aufrechterhalten und andererseits das Abfließen des ausreichend zerkleinerten Mahlgutes im Bereich zwischen zwei Mahlrollen erleichtert werden.Furthermore, it is conceivable that in the region of the edge of the grinding plate a co-rotating with the grinding plate jam is provided. In this case, the jamming edge will be formed higher in the area of the grinding roller than the storage ring. As a result, on the one hand maintain a Mahlgutbett and on the other hand, the flow of sufficiently comminuted material to be ground in the area between two grinding rollers are facilitated.

Weitere Vorteile und Ausgestaltungen der Erfindung werden im Folgenden anhand der Beschreibung und der Zeichnung näher erläutert.Further advantages and embodiments of the invention will be explained in more detail below with reference to the description and the drawing.

In der Zeichnung zeigen

Fig. 1
eine schematische Draufsicht einer Rollenmühle,
Fig. 2
eine schematische Schnittdarstellung längs der Linie A-A der Fig. 1 und
Fig. 3
eine etwas detailliertere Draufsicht einer weiteren Rollenmühle.
In the drawing show
Fig. 1
a schematic plan view of a roller mill,
Fig. 2
a schematic sectional view along the line AA of Fig. 1 and
Fig. 3
a slightly more detailed plan view of another roller mill.

Die in den Figuren 1 und 2 dargestellte Rollenmühle besteht im Wesentlichen aus einem Mahlteller 1 und wenigstens einer auf dem Mahlteller abrollenden Mahlrolle 2. Im dargestellten Ausführungsbeispiel sind vier Mahlrollen 2 dargestellt. Im Rahmen der Erfindung wäre es aber beispielsweise auch denkbar, eine Rollenmühle mit zwei oder sechs Mahlrollen vorzusehen. Der Mahlteller 1 ist um eine vertikale Achse 1a drehbar angetrieben. Die Mahlrollen 2 ruhen mit ihrem Eigengewicht auf dem Mahlteller 1 bzw. können durch eine geeignete Einrichtung mit einer zusätzlichen Anpresskraft beaufschlagt werden.The in the Figures 1 and 2 shown roller mill consists essentially of a grinding table 1 and at least one rolling on the grinding table grinding roller 2. In the illustrated embodiment, four grinding rollers 2 are shown. In the context of the invention, but it would also be conceivable, for example, to provide a roller mill with two or six grinding rollers. The grinding table 1 is rotatably driven about a vertical axis 1a. The grinding rollers 2 rest with their own weight on the grinding table 1 or can be acted upon by a suitable device with an additional contact force.

Das zu zerkleinernde Mahlgut wird mittig über eine Aufgabeeinrichtung 3 auf den rotierenden Mahlteller 1 aufgegeben und gelangt von dort durch Zentrifugalkraft nach außen und wird von den Mahlrollen 2 erfasst. Die eigentliche Zerkleinerungsarbeit findet im Spalt zwischen Mahlrolle 2 und Mahlteller 1 statt. Um zu verhindern, dass das Mahlgut radial aus dem zwischen Mahlteller und Mahlrolle gebildeten Spalt entweicht, ist auf der dem Rand 1b des Mahltellers 1 zugewandten Seite der Mahlrolle 2 eine nicht mit dem Mahlteller mitrotierende, d.h. stationär angeordnete Staukante 4 vorgesehen.The millbase to be comminuted is fed centrally via a feed device 3 on the rotating grinding table 1 and passes from there by centrifugal force to the outside and is detected by the grinding rollers 2. The actual crushing work takes place in the gap between the grinding roller 2 and the grinding table 1. In order to prevent the ground material from escaping radially from the gap formed between the grinding table and the grinding roller, on the side of the grinding roller 2 facing the edge 1b of the grinding table 1, a grinding wheel not co-rotating with the grinding plate, i. stationary arranged Staukante 4 provided.

Die Staukante 4 kann dabei sowohl in radialer Richtung (Doppelpfeil 5) als auch in vertikaler Richtung (Doppelpfeil 6) durch geeignete Mittel verstellbar sein.The storage edge 4 can be adjustable by suitable means both in the radial direction (double arrow 5) and in the vertical direction (double arrow 6).

Weiterhin kann es zweckmäßig sein, wenn ein am äußeren Rand 1a vorgesehener, mit dem Mahlteller 1 mitrotierender Stauring 7 vorgesehen ist. In diesem Fall wird man zweckmäßigerweise die Höhe h1 der Staukante 4 (über dem Mahlteller 1) größer wählen als die Höhe h2 des Staurings 7. Selbstverständlich können auch zusätzliche, aus der Praxis bekannte Stauringerhöhungen vorgesehen werden. Außerdem ist es denkbar, dass die Staukante über ihre Länge in Umfangsrichtung des Mahltellers 1 unterschiedliche Höhen aufweist.Furthermore, it may be expedient if a provided at the outer edge 1a, with the grinding table 1 co-rotating stop ring 7 is provided. In this case, it will be expedient to choose the height h 1 of the storage edge 4 (above the grinding table 1) greater than the height h 2 of the storage ring 7. Of course, additional, known from practice Stauringerhöhungen be provided. It is also conceivable that the storage edge has different heights over its length in the circumferential direction of the grinding table 1.

Fig. 3 zeigt eine etwas detailliertere Draufsicht der Rollenmühle, aus der insbesondere eine denkbare Form der stationären Staukante 4 hervorgeht. Im Bereich des zwischen Mahlteller und Mahlrolle ausgebildeten Spalts ist der angrenzende Bereich 4a der Staukante 4 im Wesentlichen parallel zur Mahlrolle ausgebildet. Der in Drehrichtung 9 des Mahltellers 1 vordere Bereich 4b der Staukante ist leicht abgeknickt oder abgebogen und folgt in etwa der Kontur des Mahltellerrandes 1b. Fig. 3 shows a somewhat more detailed plan view of the roller mill, from which in particular a conceivable form of the stationary edge of the jam 4 emerges. In the area of the gap formed between the grinding plate and the grinding roller, the adjacent area 4a of the stopping edge 4 is formed essentially parallel to the grinding roller. The front in the direction of rotation 9 of the grinding plate 1 area 4b of the Staukante is slightly bent or bent and follows approximately the contour of Mahltellerrandes 1b.

Nach der Überrollung gelangt das genügend zerkleinerte Mahlgut durch Zentrifugalkraft weiter nach außen und wird über den Rand 1b des Mahltellers bzw. über den Stauring 7 ausgetragen. Durch die erhöhte Staukante im Bereich der Mahlrolle 2 wird sichergestellt, dass das Mahlgut einer ausreichenden Zerkleinerung durch die Mahlrolle unterworfen wird, bevor es über den Rand des Mahltellers 1 ausgetragen wird. Außerdem wird durch den wesentlich niedrigeren Stauring 7 oder den ggf. überhaupt nicht vorgesehenen Stauring sichergestellt, dass insbesondere das feine Gut ausgetragen wird, bevor es noch mal überrollt wird. Dies wirkt sich positiv auf die Laufruhe der Maschine aus, sodass höhere Drehzahlen des Mahltellers 1 gefahren werden können und dadurch eine höhere Durchsatzleistung erreicht wird.After the overrolling, the sufficiently comminuted regrind passes further outward by centrifugal force and is discharged via the edge 1b of the grinding table or via the storage ring 7. Due to the increased congestion in the area of Grinding roller 2 ensures that the material to be ground is subjected to sufficient comminution by the grinding roller before it is discharged over the edge of the grinding table 1. In addition, it is ensured by the much lower storage ring 7 or possibly not provided at all Stauring that in particular the fine material is discharged before it is rolled over again. This has a positive effect on the smoothness of the machine, so that higher speeds of the grinding table 1 can be driven and thus a higher throughput is achieved.

Claims (10)

  1. Roller mill having a grinding table (1) and at least one grinding roller (2) rolling on the grinding table, grinding stock to be crushed being subjected to compaction in a gap formed between the grinding table and the grinding roller before being led off via the rim of the grinding table, and a fixed impounding edge (4) that does not rotate together with the grinding table furthermore being provided, said edge being provided at least on the side of the grinding roller (2) facing the rim (1b) of the grinding table (1) and forming at least a part of an elevation of the rim of the grinding table, characterized in that the elevation of the rim of the grinding table is higher in the area of the grinding rollers than in the area between the grinding rollers, in order to prevent the ground material escaping radially from the gap (8) formed between the grinding table (1) and the grinding roller (2).
  2. Roller mill according to Claim 1, characterized in that the impounding edge (4) is adjustable in a radial direction.
  3. Roller mill according to Claim 1, characterized in that the impounding edge (4) is adjustable in a vertical direction.
  4. Roller mill according to Claim 1, characterized in that over its length the impounding edge (4) has different heights.
  5. Roller mill according to Claim 1, characterized in that the impounding edge (4) is of straight design.
  6. Roller mill according to Claim 1, characterized in that the impounding edge (4) is arranged parallel to the grinding roller.
  7. Roller mill according to Claim 1, characterized in that an impounding ring (7), which rotates together with the grinding table and which also forms a part of the elevation of the rim of the grinding table, is provided in the area of the rim (1b) of the grinding table (1).
  8. Roller mill according to Claim 7, characterized in that the impounding edge (4) in the area of the grinding roller (2) is higher than the impounding ring (7).
  9. Roller mill according to Claim 7, characterized in that impounding ring elevations are additionally provided.
  10. Roller mill according to Claim 1, characterized in that at least two and preferably more than three grinding rollers (2) are provided.
EP07730281A 2006-06-21 2007-06-20 Roll mill Expired - Fee Related EP2032260B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006028547A DE102006028547A1 (en) 2006-06-21 2006-06-21 roller mill
PCT/EP2007/056165 WO2007147860A1 (en) 2006-06-21 2007-06-20 Roll mill

Publications (2)

Publication Number Publication Date
EP2032260A1 EP2032260A1 (en) 2009-03-11
EP2032260B1 true EP2032260B1 (en) 2012-01-11

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EP07730281A Expired - Fee Related EP2032260B1 (en) 2006-06-21 2007-06-20 Roll mill

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US (1) US7938349B2 (en)
EP (1) EP2032260B1 (en)
JP (1) JP5265534B2 (en)
CN (1) CN101421043B (en)
DE (1) DE102006028547A1 (en)
DK (1) DK2032260T3 (en)
WO (1) WO2007147860A1 (en)

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US8015343B2 (en) * 2008-08-08 2011-09-06 Amazon Technologies, Inc. Providing executing programs with reliable access to non-local block data storage
CN102284322B (en) * 2011-08-16 2012-09-05 天津苏美尔环保投资有限公司 Vertical roller mill
CN103521309A (en) * 2013-10-25 2014-01-22 湖南中宏重型机器有限公司 Combined grinding ring of vertical ring mill
CN103521307B (en) * 2013-10-25 2016-04-27 湖南中宏重型机器有限公司 Vertical type ring mill combined hammer is taken turns
CN108126807A (en) * 2018-01-19 2018-06-08 福建志坤能源科技开发有限公司 Grinding device for copper oxide
DE102019200191A1 (en) 2018-06-08 2019-12-12 Sms Group Gmbh Dry processing of kaolin in the production of HPA
CN109092393A (en) * 2018-08-15 2018-12-28 佛山阳途科技有限公司 A kind of multiple roll Wheat press
US10758912B1 (en) * 2019-04-11 2020-09-01 Gene P. Guthmiller Material processing system

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DE1507579B1 (en) 1966-05-20 1970-09-24 Loesche Kg Caution device for roller mills
DE3642814C2 (en) * 1986-12-15 1996-10-10 Pfeiffer Ag Geb Locking device
JP2754797B2 (en) * 1989-11-07 1998-05-20 宇部興産株式会社 Vertical crusher
JP2868103B2 (en) * 1991-07-02 1999-03-10 宇部興産株式会社 Vertical crusher
JP2618777B2 (en) * 1991-08-02 1997-06-11 宇部興産株式会社 Vertical crusher
JP2882132B2 (en) * 1991-09-03 1999-04-12 宇部興産株式会社 Vertical crusher
JP2704477B2 (en) * 1992-03-09 1998-01-26 宇部興産株式会社 Vertical crusher
JPH0747296A (en) * 1993-08-10 1995-02-21 Ube Ind Ltd Vertical type pulverizer

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Publication number Publication date
US20090200409A1 (en) 2009-08-13
JP2009541027A (en) 2009-11-26
DK2032260T3 (en) 2012-05-07
EP2032260A1 (en) 2009-03-11
WO2007147860A1 (en) 2007-12-27
CN101421043B (en) 2010-06-02
DE102006028547A1 (en) 2007-12-27
CN101421043A (en) 2009-04-29
JP5265534B2 (en) 2013-08-14
US7938349B2 (en) 2011-05-10

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