EP1973665B1 - Method for comminuting material and roller mill - Google Patents
Method for comminuting material and roller mill Download PDFInfo
- Publication number
- EP1973665B1 EP1973665B1 EP08708657A EP08708657A EP1973665B1 EP 1973665 B1 EP1973665 B1 EP 1973665B1 EP 08708657 A EP08708657 A EP 08708657A EP 08708657 A EP08708657 A EP 08708657A EP 1973665 B1 EP1973665 B1 EP 1973665B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mill
- drives
- speed
- roller
- compensation control
- 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
- 238000000034 method Methods 0.000 title claims description 13
- 230000005540 biological transmission Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 235000012054 meals Nutrition 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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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
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
Definitions
- the invention relates to a roller mill and to a method for comminuting grinding stock with a roller mill, which has a grinding table, at least one grinding roller and at least two drives for driving the roller mill, wherein a compensation control for the drives is performed.
- the grinding table is usually driven in roller mills, which drives the grinding rollers on the grinding bed.
- roller mills which drives the grinding rollers on the grinding bed.
- the invention is therefore based on the object to improve the compensation control for the drives.
- a roller mill which has a grinding table, at least one grinding roller and at least two drives for driving the roller mill.
- a power compensation control is performed, wherein the power of the drives are controlled in a predetermined ratio to each other by controlling the speed of at least one drive.
- At least two grinding rollers are driven via a respective drive.
- the grinding table is driven only via the at least two grinding rollers and the material to be ground. But it is also conceivable that the grinding plate is assigned its own drive.
- the control of the speed of the drives via frequency converter, which preferably operate with field-oriented control.
- the power compensation control additionally comprises a regulation of the rotational speed of the grinding table, wherein preferably a predetermined speed of the grinding table is maintained.
- the drawing shows a schematic representation of a roller mill with a power compensation control.
- a roller mill 1 which has a grinding table 10, at least two grinding rollers 11, 12 and at least two drives 13, 14 for driving the two grinding rollers 11, 12.
- Each drive comprises a motor 13a, 14a and a transmission 13b, 14b.
- a plurality of grinding rollers in particular three, four or more grinding rollers can be provided.
- the grinding table 10 is freely rotatable about an axis of rotation 10a, so that it is set in rotation only via the driven grinding rollers 11, 12 and the grinding material 3 located between the grinding roller and the grinding table. It would also be conceivable that the grinding table is assigned its own drive.
- a power compensation control 2 wherein the power of the drives 13, 14 are regulated in a predetermined ratio to each other by controlling the speed of at least one drive.
- identical drives 13, 14 are provided for the two identically designed grinding rollers 11, 12, so that the power balance control keeps the power of the two drives at the same level.
- the grinding table could be driven at a lower or higher power than the grinding rollers.
- the power balancing control 2 in the illustrated embodiment consists essentially of one of the drives 13, 14 associated frequency converter 20, 21, a power compensation regulator 22, a Mahltellerfacesensor 23 and a Mahltellertextiereregler 24th
- the frequency converter 20, 21 are provided in a conventional manner with a field-oriented control. You get from the drives 13, 14 the current motor current or the motor voltage. From this, the power consumption of each drive is determined and a moving sum mean value is formed, which is weighted by a factor (with the same power of the drives equal to 0.5) and represents the target value of the drive. At almost constant Resistance torque depends this value essentially only on the speed of the respective drive.
- a deviation between the drive actual and nominal drive power is applied to the power compensation regulator 22, which effects a power adjustment of the two drives 13, 14 by adjusting the rotational speed of one or both drives such that the power of the two drives in the predetermined ratio, in the present case at the same level.
- the grinding table 10 rotates at a predetermined setpoint speed n soll .
- the grinding table speed controller 24 communicates with the grinding table speed sensor 23 and continuously receives the actual value of the speed of the grinding table, which is compared with the setpoint n soll , from which the control deviation results. From this, the controller generates the set speed of the drives 13, 14 at a fixed assumed ratio.
- the frequency converters 20, 21 have an internal speed controller and a revolving motor model, whereby the drive speed of the drives and the engine torque can be tapped.
- the frequency converter must be able to read in and output control and status data at the latest every 5 ms, so that the function of the power compensation regulator is ensured.
- the system is a cascade control, the individual levels are dynamically decoupled from each other and thus can be considered individually.
- the advantage of the regulation described above is that with a power balancing control the power consumption of the Drives 13, 14 differ only slightly and even major changes in the system (translation jump) are very fast.
- a further advantage is that it is possible to dispense almost completely with expensive and maintenance-intensive measuring technology, since the frequency converters used provide all relevant data except for the grinding table speed.
- the control interventions can be performed almost without power, so that the overall efficiency is at the level of a regulated drive.
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Disintegrating Or Milling (AREA)
Description
Die Erfindung betrifft eine Rollenmühle sowie ein Verfahren zur Zerkleinerung von Mahlgut mit einer Rollenmühle, die einen Mahlteller, wenigstens eine Mahlrolle sowie wenigstens zwei Antriebe zum Antreiben der Rollenmühle aufweist, wobei eine Ausgleichsregelung für die Antriebe durchgeführt wird.The invention relates to a roller mill and to a method for comminuting grinding stock with a roller mill, which has a grinding table, at least one grinding roller and at least two drives for driving the roller mill, wherein a compensation control for the drives is performed.
In der Praxis wird bei Rollenmühlen üblicherweise der Mahlteller angetrieben, welcher über das Mahlbett die Mahlrollen antreibt. Dies führt jedoch zur starken Leistungsschwankungen und somit zu hohen Belastungen des Antriebsstranges, sodass man in der sicher zu übertragenden Antriebsleistung sehr begrenzt ist.In practice, the grinding table is usually driven in roller mills, which drives the grinding rollers on the grinding bed. However, this leads to strong power fluctuations and thus to high loads on the drive train, so that one is very limited in the safely transmitted drive power.
Man hat daher in der
Bereits geringe Drehzahländerungen zwischen einzelnen Mahlrollen bewirken bei den einzelnen Antrieben relativ hohe Leistungsschwankungen. Dies kann dazu führen, dass die Mahlrollen dauernd beschleunigt oder verzögert werden, d.h. die einzeln angetriebenen Mahlrollen arbeiten gegeneinander, was während des Zerkleinerungsbetriebes zu einem deutlich erhöhten Kraft- bzw. Energiebedarf führt.Even small speed changes between individual grinding rollers cause relatively high power fluctuations in the individual drives. This can cause the grinding rolls to be constantly accelerated or decelerated, i. the individually driven grinding rollers work against each other, which during the crushing operation leads to a significantly increased power and energy requirements.
In der
Die Erfindung liegt daher die Aufgabe zugrunde, die Ausgleichsregelung für die Antriebe zu verbessern.The invention is therefore based on the object to improve the compensation control for the drives.
Erfindungsgemäß wird diese Aufgabe durch die Merkmale der Ansprüche 1 und 10 gelöst.According to the invention, this object is solved by the features of
Beim erfindungsgemäßen Verfahren zur Zerkleinerung von Mahlgut wir eine Rollenmühle verwendet, die einen Mahlteller, wenigstens eine Mahlrolle sowie wenigstens zwei Antriebe zum Antreiben der Rollenmühle aufweist. Außerdem wird eine Leistungsausgleichsregelung durchgeführt, wobei durch Regelung der Drehzahl wenigstens eines Antriebs die Leistung der Antriebe in einem vorgegebenen Verhältnis zueinander geregelt werden.In the method according to the invention for comminuting grinding stock, we use a roller mill which has a grinding table, at least one grinding roller and at least two drives for driving the roller mill. In addition, a power compensation control is performed, wherein the power of the drives are controlled in a predetermined ratio to each other by controlling the speed of at least one drive.
Auf diese Weise können dynamische Übersetzungsänderungen zwischen Mahlteller und Mahlrolle zuverlässig ausgeglichen werden, wobei ganz bewusst unterschiedliche Drehzahlen für die Antriebe zugelassen werden.In this way, dynamic translation changes between grinding plate and grinding roller can be compensated reliably, with deliberately different speeds are allowed for the drives.
Gemäß einem bevorzugten Ausführungsbeispiel werden wenigstens zwei Mahlrollen über jeweils einen zugeordneten Antrieb angetrieben. Der Mahlteller wird dabei lediglich über die wenigstens zwei Mahlrollen und das Mahlgut angetrieben. Es ist aber auch denkbar, dass dem Mahlteller ein eigener Antrieb zugeordnet ist.According to a preferred embodiment, at least two grinding rollers are driven via a respective drive. The grinding table is driven only via the at least two grinding rollers and the material to be ground. But it is also conceivable that the grinding plate is assigned its own drive.
Die Regelung der Drehzahl der Antriebe erfolgt über Frequenzumrichter, die vorzugsweise mit feldorientierter Regelung arbeiten.The control of the speed of the drives via frequency converter, which preferably operate with field-oriented control.
Gemäß einem bevorzugten Ausführungsbeispiel umfasst die Leistungsausgleichsregelung zusätzlich eine Regelung der Drehzahl des Mahltellers, wobei vorzugsweise eine vorgegebene Drehzahl des Mahltellers aufrechterhalten wird.According to a preferred embodiment, the power compensation control additionally comprises a regulation of the rotational speed of the grinding table, wherein preferably a predetermined speed of the grinding table is maintained.
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.
Die Zeichnung zeigt eine schematische Darstellung einer Rollenmühle mit einer Leistungsausgleichsregelung.The drawing shows a schematic representation of a roller mill with a power compensation control.
In der Zeichnung ist eine Rollenmühle 1 schematisch dargestellt, die einen Mahlteller 10, wenigstens zwei Mahlrollen 11, 12 sowie wenigstens zwei Antriebe 13, 14 zum Antreiben der beiden Mahlrollen 11, 12 aufweist. Jeder Antrieb umfasst einen Motor 13a, 14a sowie ein Getriebe 13b, 14b. Im Rahmen der Erfindung können selbstverständlich auch mehrere Mahlrollen, insbesondere drei, vier oder mehr Mahlrollen vorgesehen werden.In the drawing, a
Der Mahlteller 10 ist um eine Drehachse 10a frei drehbar, sodass er lediglich über die angetriebenen Mahlrollen 11, 12 und das zwischen Mahlrolle und Mahlteller befindliche Mahlgut 3 in Rotation versetzt wird. Es wäre aber auch denkbar, dass dem Mahlteller ein eigener Antrieb zugeordnet wird.The grinding table 10 is freely rotatable about an axis of
Die Übertragung der Drehbewegung der Mahlrollen 11, 12 auf den Mahlteller 10 erfolgt über das Mahlgut 3. Durch das in der Praxis relativ ungleichmäßig ausgebildete Mahlgutbett ändert sich das Übersetzungsverhältnis von Mahlrolle zu Mahlteller laufend. Das Übersetzungsverhältnis wird letztendlich durch den Abstand des Kraftangriffspunktes zwischen Mahlrollenachse und Mahltellerachse bestimmt. In der Zeichnung ist der Abstand r1 des Kraftangriffspunktes der Mahlrolle 11 zur Drehachse 10a kleiner als der Abstand r2 des Friktionspunktes der Mahlrolle 12 zur Drehachse 10a.The transmission of the rotational movement of the grinding rollers 11, 12 on the grinding table 10 via the material to be ground 3. By virtue of the practice in practice relatively uneven Mahlgutbett the ratio of Mahlrolle to Mahlteller changes continuously. The gear ratio is ultimately determined by the distance of the point of force application between Mahlrollenachse and Mahltellerachse. In the drawing, the distance r 1 of the force application point of the grinding roller 11 to the
Ein unterschiedliches Übersetzungsverhältnis führt jedoch dazu, dass bei gleicher Drehzahl der Mahlrollen 11, 12 unterschiedliche Drehmomente auf den Mahlteller übertragen werden. Dadurch wird der eine Antrieb gegenüber dem anderen Antrieb abgebremst bzw. beschleunigt. Dies daraus resultierenden starken Leistungsschwankungen der Antriebe haben einen erhöhten Energiebedarf zur Folge. Außerdem wird die gewünschte Leistungsverteilung zwischen den Antrieben damit zerstört.However, a different gear ratio results in that at the same speed of the grinding rollers 11, 12 different torques are transmitted to the grinding table. As a result, one drive is braked or accelerated with respect to the other drive. The resulting strong power fluctuations of the drives result in an increased energy requirement. In addition, the desired power distribution between the drives is destroyed.
Um diese Auswirkungen zu vermeiden ist eine Leistungsausgleichsregelung 2 vorgesehen, wobei durch Regelung der Drehzahl wenigstens eines Antriebs die Leistung der Antriebe 13, 14 in einem vorgegebenen Verhältnis zueinander geregelt werden. Im dargestellten Ausführungsbeispiel sind für die beiden identisch ausgebildeten Mahlrollen 11, 12 gleiche Antriebe 13, 14 vorgesehen, sodass die Leistungsausgleichsregelung die Leistung der beiden Antriebe auf gleichem Niveau hält.In order to avoid these effects, a
Es wäre aber auch denkbar, dass neben ein oder mehreren Mahlrollen auch der Mahlteller über einen eigenen Antrieb verfügt. In diesem Fall könnte der Mahlteller mit einer niedrigeren oder höheren Leistung als die Mahlrollen angetrieben werden.But it would also be conceivable that in addition to one or more grinding rollers and the grinding table has its own drive. In this case, the grinding table could be driven at a lower or higher power than the grinding rollers.
Die Leistungsausgleichsregelung 2 besteht im dargestellten Ausführungsbeispiel im Wesentlichen aus je einem der Antriebe 13, 14 zugeordneten Frequenzumrichter 20, 21, einem Leistungsausgleichsregler 22, einem Mahltellerdrehzahlsensor 23 und einem Mahltellerdrehzahlregler 24.The
Die Frequenzumrichter 20, 21 sind in an sich bekannter Art und Weise mit einer feldorientierten Regelung versehen. Sie erhalten von den Antrieben 13, 14 den momentanen Motorstrom bzw. die Motorspannung. Daraus wird die Leistungsaufnahme jedes Antriebs ermittelt und ein gleitender Summenmittelwert gebildet, der mit einem Faktor (bei gleichen Leistungen der Antriebe gleich 0,5) gewichtet wird und den Sollwert des Antriebs darstellt. Bei nahezu konstantem Widerstandmoment hängt dieser Wert im Wesentlichen nur von der Drehzahl des jeweiligen Antriebs ab.The frequency converter 20, 21 are provided in a conventional manner with a field-oriented control. You get from the
Eine Abweichung zwischen Antriebsist- und Antriebssollleistung wird auf den Leistungsausgleichregler 22 gegeben, welcher eine Leistungsanpassung der beiden Antriebe 13, 14 bewirkt, indem die Drehzahl eines oder beider Antriebe derart angepasst wird, dass die Leistung der beiden Antriebe in dem vorgegebenen Verhältnis, im vorliegenden Fall auf gleichen Niveau, geregelt wird. Dabei wird außerdem berücksichtigt, dass der Mahlteller 10 mit einer vorgegebenen Solldrehzahl nsoll dreht.A deviation between the drive actual and nominal drive power is applied to the
Zweckmäßigerweise ist jedoch eine zusätzliche Regelung für die Mahltellerdrehzahl vorgesehen, der hier durch den Mahltellerdrehzahlregler 24 verwirklicht ist. Der Mahltellerdrehzahlregler 24 steht mit dem Mahltellerdrehzahlsensor 23 in Verbindung und erhält laufend den Istwert der Drehzahl des Mahlteller, die mit dem Sollwert nsoll verglichen wird, woraus sich die Regelabweichung ergibt. Daraus erzeugt der Regler bei einem fest angenommenen Übersetzungsverhältnis die Solldrehzahl der Antriebe 13, 14.Appropriately, however, an additional control for the Mahltellerdrehzahl is provided, which is realized here by the Mahltellerdrehzahlregler 24. The grinding table speed controller 24 communicates with the grinding table speed sensor 23 and continuously receives the actual value of the speed of the grinding table, which is compared with the setpoint n soll , from which the control deviation results. From this, the controller generates the set speed of the
Die Frequenzumrichter 20, 21 verfügen über einen internen Drehzahlregler und ein mitlaufendes Motormodell, wodurch die Antriebsdrehzahl der Antriebe und das Motormoment abgegriffen werden können. Zweckmäßigerweise müssen die Frequenzumrichter in der Lage sein, Steuer- und Zustandsdaten spätestens aller 5 ms einzulesen bzw. auszugeben, damit die Funktion des Leistungsausgleichsreglers gewährleistet ist.The frequency converters 20, 21 have an internal speed controller and a revolving motor model, whereby the drive speed of the drives and the engine torque can be tapped. Advantageously, the frequency converter must be able to read in and output control and status data at the latest every 5 ms, so that the function of the power compensation regulator is ensured.
Regelungstechnisch stellt sich das System als Kaskadenregelung dar, wobei die einzelnen Ebenen dynamisch voneinander entkoppelt sind und somit einzeln betrachtet werden können. Der Vorteil der obenbeschriebenen Regelung besteht darin, dass mit einer Leistungsausgleichsregelung die Leistungsaufnahmen der Antriebe 13, 14 nur geringfügig voneinander abweichen und selbst starke Änderungen im System (Übersetzungssprung) sehr schnell werden.Control technology, the system is a cascade control, the individual levels are dynamically decoupled from each other and thus can be considered individually. The advantage of the regulation described above is that with a power balancing control the power consumption of the
Weiterhin ist von Vorteil, dass nahezu vollständig auf aufwendige und wartungsintensive Messtechnik verzichtet werden kann, da die eingesetzten Frequenzumrichter alle relevanten Daten bis auf die Mahltellerdrehzahl bereitstellen. Mit den Frequenzumrichtern können darüber hinaus die Regeleingriffe nahezu leistungslos erfolgen, sodass der Gesamtwirkungsgrad auf dem Niveau eines umgeregelten Antriebs liegt.A further advantage is that it is possible to dispense almost completely with expensive and maintenance-intensive measuring technology, since the frequency converters used provide all relevant data except for the grinding table speed. In addition, with the frequency converters, the control interventions can be performed almost without power, so that the overall efficiency is at the level of a regulated drive.
Claims (11)
- Method for comminuting material to be ground having a roller mill (1) which has a mill platen (10), at least one mill roller (11, 12) and at least two drives (13, 14) for driving the roller mill (1), with a compensation control operation being carried out for the drives, characterised in that
the compensation control system is formed by a power compensation control system (2), with the power of the drives being controlled at a predetermined ratio relative to each other by the speed of at least one drive (12, 14) being controlled. - Method according to claim 1, characterised in that at least two driven mill rollers (11, 12) are provided and a drive (13, 14) is associated with each mill roller.
- Method according to claim 2, characterised in that the mill platen (10) is driven only by means of the at least two mill rollers (11, 12) and the material (3) to be ground.
- Method according to one or more of the preceding claims, characterised in that the power compensation control system (2) further comprises control of the speed of the mill platen (10).
- Method according to one or more of the preceding claims, characterised in that the speed of the drives (13, 14) is controlled in such a manner that a predetermined speed of the mill platen (10) is further maintained.
- Method according to one or more of the preceding claims, characterised in that the power compensation control system (2) comprises a motor model.
- Method according to one or more of the preceding claims, characterised in that the control of the speed of the drives (13, 14) is carried out by means of frequency converters (10, 21).
- Method according to one or more of the preceding claims, characterised in that the power consumption of the drives (13, 14) is detected.
- Method according to one or more of the preceding claims, characterised in that an independent drive is associated with the mill platen (10).
- Roller mill (1) having a mill platen (10), at least one mill roller (11, 12), at least two drives (13, 14) for driving the roller mill (1) and a compensation control system for the drives,
characterised in that the compensation control system is formed by a power compensation control system (2) which is constructed in order to carry out the method according to any one of the preceding claims. - Roller mill according to claim 10, characterised in that the power compensation control system (2) comprises a frequency converter (20, 21) associated with the drives (13, 14), a power compensation control unit (22), a mill platen speed sensor (23) and a mill platen speed control unit (24).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007006092A DE102007006092A1 (en) | 2007-02-07 | 2007-02-07 | Process for comminuting regrind with a roller mill |
PCT/EP2008/051354 WO2008095902A1 (en) | 2007-02-07 | 2008-02-04 | Method for comminuting material to be ground using a roller mill |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1973665A1 EP1973665A1 (en) | 2008-10-01 |
EP1973665B1 true EP1973665B1 (en) | 2009-11-25 |
Family
ID=39233095
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08708657A Expired - Fee Related EP1973665B1 (en) | 2007-02-07 | 2008-02-04 | Method for comminuting material and roller mill |
Country Status (7)
Country | Link |
---|---|
US (1) | US8128011B2 (en) |
EP (1) | EP1973665B1 (en) |
JP (1) | JP5208970B2 (en) |
CN (1) | CN101594939B (en) |
DE (2) | DE102007006092A1 (en) |
DK (1) | DK1973665T3 (en) |
WO (1) | WO2008095902A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008015141A1 (en) * | 2008-03-20 | 2009-11-05 | Gebr. Pfeiffer Ag | roller mill |
DE102008036784C5 (en) * | 2008-08-07 | 2013-06-20 | Thyssenkrupp Polysius Ag | Roller mill and method for comminution of regrind |
DE102008039539B4 (en) * | 2008-08-25 | 2010-08-26 | Polysius Ag | roller mill |
DE102009012353C5 (en) † | 2009-03-09 | 2013-08-22 | ThyssenKrupp Resource Technologies AG | roller mill |
DE102010016011A1 (en) * | 2010-03-18 | 2011-09-22 | Polysius Ag | roller mill |
FR2977170B1 (en) * | 2011-06-29 | 2013-08-09 | Cie Engrenages Et Reducteurs Messian Durand | DRIVE DEVICE FOR MILLING MACHINE AND CORRESPONDING MILL |
DE102012106554A1 (en) * | 2012-07-19 | 2014-05-15 | Thyssenkrupp Resource Technologies Gmbh | Method and plant for comminuting regrind with a roller mill |
DE102013200578A1 (en) * | 2013-01-16 | 2014-07-17 | Siemens Aktiengesellschaft | Method for drive control |
CN103191827B (en) * | 2013-04-17 | 2016-04-20 | 北京便宜坊烤鸭集团有限公司 | A kind of glutinous rice face production equipment and glutinous rice face production method |
CN107774379A (en) * | 2017-11-22 | 2018-03-09 | 贵州金鑫铝矿有限公司 | A kind of bauxite lapping device |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS5219780U (en) | 1975-07-29 | 1977-02-12 | ||
JPS5228875A (en) | 1975-07-29 | 1977-03-04 | Nippon Kogaku Kk <Nikon> | Mask |
JPS58159854A (en) * | 1982-03-16 | 1983-09-22 | 株式会社神戸製鋼所 | Method and device for driving roller of vertical roller mill |
DE3815218A1 (en) * | 1988-05-04 | 1989-11-16 | Loesche Gmbh | AIRFLOW MACHINE |
US5050810A (en) * | 1990-01-16 | 1991-09-24 | Parham Robert L | One-piece pulverizing roller |
CH682809A5 (en) * | 1990-12-12 | 1993-11-30 | Buehler Ag | Automatic product feed system, method for controlling the grinding of a Müllereiwalzenstuhles. |
JPH07328465A (en) * | 1994-06-01 | 1995-12-19 | Mitsubishi Heavy Ind Ltd | Operation of vertical roller mill |
JP3565380B2 (en) * | 1996-02-06 | 2004-09-15 | 中国電力株式会社 | Mill characteristic measuring device |
DE19702854A1 (en) | 1997-01-27 | 1998-07-30 | Krupp Polysius Ag | Vertical axis mill for grinding mineral materials |
FI116277B (en) * | 2003-09-26 | 2005-10-31 | Metso Paper Inc | Chopping or crushing equipment, in particular chipper |
DE102006050205B4 (en) * | 2006-10-25 | 2013-03-21 | Gebr. Pfeiffer Ag | Safety system for roller mill |
SE532429C2 (en) * | 2008-05-30 | 2010-01-19 | Sandvik Intellectual Property | Device and means of limiting spinning in a gyratory crusher |
-
2007
- 2007-02-07 DE DE102007006092A patent/DE102007006092A1/en not_active Withdrawn
-
2008
- 2008-02-04 EP EP08708657A patent/EP1973665B1/en not_active Expired - Fee Related
- 2008-02-04 CN CN2008800019848A patent/CN101594939B/en active Active
- 2008-02-04 WO PCT/EP2008/051354 patent/WO2008095902A1/en active Application Filing
- 2008-02-04 US US12/525,755 patent/US8128011B2/en not_active Expired - Fee Related
- 2008-02-04 DE DE502008000208T patent/DE502008000208D1/en active Active
- 2008-02-04 JP JP2009548678A patent/JP5208970B2/en active Active
- 2008-02-04 DK DK08708657.5T patent/DK1973665T3/en active
Also Published As
Publication number | Publication date |
---|---|
JP5208970B2 (en) | 2013-06-12 |
DE502008000208D1 (en) | 2010-01-07 |
WO2008095902A1 (en) | 2008-08-14 |
JP2010517753A (en) | 2010-05-27 |
CN101594939A (en) | 2009-12-02 |
CN101594939B (en) | 2012-05-30 |
DE102007006092A1 (en) | 2008-08-14 |
US8128011B2 (en) | 2012-03-06 |
US20100059611A1 (en) | 2010-03-11 |
DK1973665T3 (en) | 2010-04-12 |
EP1973665A1 (en) | 2008-10-01 |
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