EP2942105A1 - Roller mill and method for controlling a roller mill - Google Patents
Roller mill and method for controlling a roller mill Download PDFInfo
- Publication number
- EP2942105A1 EP2942105A1 EP14167575.1A EP14167575A EP2942105A1 EP 2942105 A1 EP2942105 A1 EP 2942105A1 EP 14167575 A EP14167575 A EP 14167575A EP 2942105 A1 EP2942105 A1 EP 2942105A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rollers
- electric motor
- roller
- value
- master
- 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.)
- Withdrawn
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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
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/42—Driving mechanisms; Roller speed control
-
- 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
-
- 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
Definitions
- the present invention relates to the field of roll mills. It relates to a roller mill with two counter-rotating rollers which are rotatably mounted in a frame, and method for controlling such a roller mill.
- Roll mills are used for grinding materials, in particular ores and cement. Roll mills typically have a roll diameter of 0.8 to 3 meters and a drive power of 0.2 to 5 megawatts. They are particularly energy efficient compared to other mill types. Such a roller mill is used for example in DE 4028015 A1 described.
- a roller mill comprises two counter-rotating rollers 1,1 ', which rollers 1,1' are mounted horizontally and parallel to each other in a frame rotatably.
- One of the two rollers 1 ' is orthogonal to the axial direction of this roller 1' displaced.
- the other of the two rollers 1 is not orthogonally displaceable.
- the displaceable roller 1 ' is pressed by a spring system onto the fixed roller 1.
- Each roller 1,1 ' has a grinding surface.
- the opposite grinding surfaces of the rollers 1,1 ' form a wedge. Material is filled from above between the rollers 1,1 'in the wedge, guided by the rotation of the rollers 1,1' down and crushed by the wedge.
- the rotation of the rollers 1,1 ' via a drive.
- Known drives for roll mills usually have two Electric motors, wherein each one electric motor of the rollers is connected.
- Fig. 2 shows a roller mill with two drives.
- a drive is assigned to one of the rollers 1,1 'and includes an electric motor 2, a propeller shaft 3 and a planetary gear 4.
- the articulation shaft is connected directly to the shaft of the displaceable roller and the planetary gear is arranged between the articulated shaft and the electric motor.
- the electric motor and the planetary gear are stationary.
- the electric motor delivers the desired speed for the rollers without a speed adjustment of a transmission.
- the drive does not comprise a gearbox and the electric motor is connected directly to the roller via the cardan shaft.
- a direct drive is arranged on the roller itself.
- the drive does not comprise a cardan shaft.
- the electric motors of the two drives are usually controlled by two separate frequency converter.
- the control strategy for the electric motors has an influence on the wear of the rollers.
- the wear of the rollers is influenced, among other things, by the contact pressure of the rollers, the circumferential speed of the grinding surfaces of the individual rollers and the difference between the peripheral speeds of the grinding surfaces of the rollers.
- the wear of the two rolls is usually different strength. It can have both the displaceable roller and the stationary roller 1 a greater wear.
- both drives try to set the same speed for the motors they control, but act independently to achieve that goal.
- the problem is that even with identical frequency converters, the speed controls have a fault so that an identical speed of the two rolls can not be achieved in this way and so result in a difference in the peripheral speeds of the grinding surfaces of the two rolls.
- the diameter of the roller is not considered. With different roll diameters, such as increased wear on one of the two rolls, even at an identical rotational speed of the two rolls leads to different peripheral speeds of the grinding surfaces of the rolls. Another consequence of this is that the load between the two rolls is not evenly distributed, resulting in relative rotation of the two rolls, which in turn leads to increased wear.
- Fig. 3a shows a schematic representation of the signal flow of a roll mill with this control strategy in an initial phase. Both frequency converters 5 are given an identical speed reference 61 as in the first one Steuerungsstratgie.
- Fig. 3b shows a schematic representation of the signal flow of a roll mill with this control strategy in a production phase.
- the frequency converter 5 of the follower After reaching a defined load threshold, the frequency converter 5 of the follower is no longer given the identical speed reference 61 but actual torque value 62 of the masters. This allows a better uniform distribution of the loads on the two rolls and a reduction in the peripheral speed difference of the grinding surfaces of the rolls and thus leads to a reduction of the individual wear of the rolls.
- the master follower strategy can use the actual speed (speed follower) value of the master as the reference for the followers in the production phase, rather than the actual torque value (torque follower).
- both frequency inverters 94 are given an identical speed reference and after switching to the production phase, the follower is given the actual value of the speed of the masters.
- the problem with the master follower strategy is that wear can only be optimized individually for each roller in terms of service life. It is not possible to optimize the wear of both rolls in the overall system of the roll mill so as to maximize the life of the roll mill.
- Object of the present invention is to provide a roller mill, which has an increased life.
- Fig. 4 shows a schematic representation of the signal flow in a roll mill according to the invention.
- the controller provides a speed controller of the frequency converter 5 of the master electric motor 2 before a target value 61 for the speed.
- the resulting by the regulation of the speed for the master electric motor 2 actual value 62 of the rotational speed is in one Multiplier 65 multiplied by a load distribution factor 64.
- the resulting value is given as a setpoint for the speed controller frequency converter 5 for the follower electric motor 2 '.
- a controller 66 is shown, which controller may be a PID controller, for example, to ensure a closed regulator circuit.
- the output of the PID controller is added or subtracted from the original speed reference 61, and then passed to the frequency converter of the follower electric motor 2 'as the setpoint.
- the load distribution factor By the load distribution factor, the wear of the individual rollers can be influenced relative to each other.
- Fig. 5 shows an exemplary relationship between the wear of the rollers and the choice of the load distribution factor.
- the wear 112 of the respective roll is shown in the form of reduction of the roll diameter over the rotational work already performed by the respective roll.
- the curves 113, 114 adjust the wear of two rolls of a pair of rolls as a function of the turning work there.
- the curve 114 shows a greater wear of the corresponding roller than the wear of the roller which is shown in the curve 113.
- the load factor is now chosen so that the roller with the accumulated greater previous wear carries a smaller part of the load required for the meal.
- the load distribution factor may be a positive real number including zero.
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Control Of Multiple Motors (AREA)
Abstract
Gegenstand der Erfindung ist eine Walzenmühle umfassend zwei parallel angeordnete, gegeneinandergepresste und gegenläufig rotierende Walzen (1,1'), wobei eine der Walzen (1') orthogonal zur axialen Richtung dieser Walze (1') verschiebbar ist, zwei Antriebe, welche Antriebe je einer der beiden Walzen (1,1') zugeordnet sind und je einen Elektromotor (2,2') aufweisen, undeine Steuereinheit, wobei die Steuereinheit einem Master-Elekromotor (2) der Elektromotoren einen Sollwert (61) für die Drehzahl vorgibt, wobei die Steuereinheit einem Follower-Elektromotor (2') der Elektromotoren den Drehmomentistwert (62) oder den Drehzahlistwert (62) des Master-Elektromotors multipliziert mit einem Lastteilfaktor (64) als Sollwert (63) vorgibt.The invention relates to a roller mill comprising two parallel, oppositely pressed and counter-rotating rollers (1,1 '), wherein one of the rollers (1') orthogonal to the axial direction of this roller (1 ') is displaceable, two drives, which drives each one of the two rollers (1,1 ') are associated and each having an electric motor (2,2'), anda control unit, wherein the control unit, a Master Elekromotor (2) of the electric motors sets a target value (61) for the rotational speed, the control unit prescribes to a follower electric motor (2 ') of the electric motors the torque actual value (62) or the actual speed value (62) of the master electric motor multiplied by a load part factor (64) as desired value (63).
Description
Die vorliegende Erfindung bezieht sich auf das Gebiet von Walzenmühlen. Sie betrifft eine Walzenmühle mit zwei gegenläufig rotierenden Walzen, welche in einem Rahmen drehbar gelagert sind, und Verfahren zur Steuerung einer solchen Walzenmühle.The present invention relates to the field of roll mills. It relates to a roller mill with two counter-rotating rollers which are rotatably mounted in a frame, and method for controlling such a roller mill.
Walzenmühlen werden zum Mahlen von Materialien, insbesondere von Erzen und Zement verwendet. Walzenmühlen haben typischerweise einen Walzendurchmesser von 0.8 bis 3 Metern und eine Antriebsleistung von 0.2 bis 5 Megawatt. Sie sind besonders energieeffizient im Vergleich zu anderen Mühlenarten. Eine solche Walzenmühle wird beispielsweise in
Wie in
Die Elektromotoren der beiden Antriebe werden meist über zwei getrennte Frequenzumrichter gesteuert. Die Steuerungsstrategie für die Elektromotoren haben eine Einfluss auf die Abnutzung der Rollen. Im Allgemeinen wird die Abnutzung der Rollen unter anderem von dem Anpressdruck der Walzen, der Umfangsgeschwindigkeit der Mahlflächen der einzelnen Walzen und dem Untschied zwischen den Umfangsgeschwindigkeiten der Mahlflächen der Walzen beeinflusst. Ausserdem ist die Abnutzung der beiden Walzen meist unterschiedlich stark. Es kann sowohl die verschiebbaren Walze als auch die feststehenden Walze 1 eine grössere Abnutzung aufweisen. Für die Steuerung einer Walzenmühle sind folgende Steuerungstrategien aus dem Artikel "
Bei der ersten Strategie wird für beide Motoren eine identische Drehzahlreferenz vorgegeben. So versuchen beide Frequenzumrichter die gleiche Drehzahl für die von ihnen gesteuerten Motoren einzustellen, aber handeln dabei unabhängig voneinander, um dieses Ziel zu erreichen. Problematisch ist dabei, dass auch bei baugleichen Frequenzumrichtern die Drehzahlsteuerungen einen Fehler aufweisen so, dass eine identische Drehzahl der beiden Walzen auf diese Weise nicht erreicht werden kann und sich so ein Unterschied in dem Umfangsgeschwindigkeiten der Mahlflächen der beiden Walzen ergeben. Zusätzlich ist es problematisch, dass der Durchmesser der Walze nicht berücksichtigt wird. Bei unterschiedlichen Walzendurchmessern, wie beispielsweise durch eine erhöhten Abnutzung bei einer der beiden Walzen, führt selbst bei einer identischer Drehzahl der beiden Walzen zu unterschiedlichen Umfangsgeschwindigkeiten der Mahlflächen der Walzen. Eine weitere Folge daraus ist, dass die Last zwischen den beiden Walzen nicht gleich verteilt ist und es so zu einem relativen Verdrehung der beiden Walzen zueinander kommt, was wiederum zu einer verstärkten Abnutzung führt.In the first strategy, an identical speed reference is specified for both motors. Thus, both drives try to set the same speed for the motors they control, but act independently to achieve that goal. The problem is that even with identical frequency converters, the speed controls have a fault so that an identical speed of the two rolls can not be achieved in this way and so result in a difference in the peripheral speeds of the grinding surfaces of the two rolls. In addition, it is problematic that the diameter of the roller is not considered. With different roll diameters, such as increased wear on one of the two rolls, even at an identical rotational speed of the two rolls leads to different peripheral speeds of the grinding surfaces of the rolls. Another consequence of this is that the load between the two rolls is not evenly distributed, resulting in relative rotation of the two rolls, which in turn leads to increased wear.
Bei der zweiten Strategie wird für beide Motoren eine identische Drehmomentreferenz vorgegeben. Problematisch ist dabei, dass im Falle, dass das Antriebsdrehmoment größer ist als das Lastdrehmoment, die Walzenmühle beschleunigen oder im umgekehrten Fall verzögert wird. Daraus resultiert eine wechselnde Drehgeschwindigkeit der Walzenmühle proportional zu Variationen des Mahlgutes, was für den Betrieb der Walzenmühle ebenfalls nachteilig ist. Bei der dritten Strategie wird einer der Elektromotoren als Master und der andere Elektromotor als Follower definiert.
Aufgabe der vorliegenden Erfindung ist es, eine Walzenmühle anzugeben, welche eine erhöhte Lebensdauer aufweist.Object of the present invention is to provide a roller mill, which has an increased life.
Diese Aufgabe wird durch eine Walzenmühle mit den Merkmalen des Patentanspruches 1 gelöst. Bevorzugte Ausführungsformen sind Gegenstand der abhängigen Patentansprüche.This object is achieved by a roller mill with the features of
Nachfolgend wird die Erfindung anhand von Ausführungsbeispielen im Zusammenhang mit den Figuren näher erläutert. Die Figuren zeigen:
Figur 1- eine schematische Darstellung eines radialen Schnitt einer Walzenmühle aus dem Stand der Technik;
Figur 2- eine Walzenmühle mit zwei Antrieben aus dem Stand der Technik;
- Figur 3a
- eine schematische Darstellung des Signalflusses bei einer Walzenmühle mit Master-Follower Steuerung aus dem Stand der Technik in einer Anfangsphase;
- Figur 3b
- eine schematische Darstellung des Signalflusses bei einer Walzenmühle mit Master-Follower Steuerung aus dem Stand der Technik in einer Produktionsphase; und
- Figur 4
- eine schematische Darstellung des Signalflusses bei einer erfindungsgemässen Walzenmühle;
Figur 5- einen beispielhafter Zusammenhang zwischen der Abnutzung der Walzen und der Wahl des Lastverteilfaktors;
- FIG. 1
- a schematic representation of a radial section of a roll mill of the prior art;
- FIG. 2
- a roller mill with two drives from the prior art;
- FIG. 3a
- a schematic representation of the signal flow in a roll mill with master-follower control of the prior art in an initial phase;
- FIG. 3b
- a schematic representation of the signal flow in a roll mill with master-follower control of the prior art in a production phase; and
- FIG. 4
- a schematic representation of the signal flow in a roll mill according to the invention;
- FIG. 5
- an exemplary relationship between the wear of the rollers and the choice of the load distribution factor;
Die in den Zeichnungen verwendeten Bezugszeichen sind in der Bezugszeichenliste zusammengefasst. Grundsätzlich sind gleiche Teile mit denselben Bezugszeichen versehen.The reference numerals used in the drawings are summarized in the list of reference numerals. Basically, the same parts are provided with the same reference numerals.
Analog zu
Es sind aber auch andere Zielsetzung bei der Wahl der Lastfaktors möglich, wie beispielsweise die stärke Abnutzung des bereits stärker abgenutzten Walze und die Schonung der weniger stark abgenutzten Walze. Im Allgemeinen kann der Lastverteilfaktor eine positive reelle Zahl einschliesslich Null sein.But there are also other objectives in the choice of the load factor possible, such as the strong wear of the already more worn roller and the conservation of less worn roller. In general, the load distribution factor may be a positive real number including zero.
- 1, 1'1, 1 '
- Walzeroller
- 2, 2'2, 2 '
- Elektromotorelectric motor
- 33
- Kardanwellepropeller shaft
- 44
- Planetengetriebeplanetary gear
- 55
- Frequenzumrichterfrequency converter
- 6161
- DrehzahlsollwertSpeed setpoint
- 6262
- Istwert MasterActual value master
- 6363
- Sollwert FollowerSetpoint Follower
- 6464
- LastverteilfaktorLastverteilfaktor
- 6565
- Multiplikatormultiplier
- 6666
- Reglerregulator
- 111111
- Drehleistung der WalzeRotational power of the roller
- 112112
- Abnutzung der WalzeWear of the roller
- 113113
- Abnutzung der verschiebbaren WalzeWear of the sliding roller
- 114114
- Abnutzung der nicht verschiebbaren WalzeWear of the non-displaceable roller
- 115115
- Lastverteilfaktor in in Abhängigkeit de Drehleistung der WalzenLoad distribution factor in dependence on the rotational power of the rollers
Claims (6)
zwei parallel angeordnete, gegeneinandergepresste und gegenläufig rotierende Walzen (1,1'), wobei eine der Walzen (1') orthogonal zur axialen Richtung dieser Walze (1') verschiebbar ist,
zwei Antriebe, welche Antriebe je einer der beiden Walzen (1,1') zugeordnet sind und je einen Elektromotor (2,2') aufweisen, und
eine Steuereinheit, wobei
die Steuereinheit einem Master-Elekromotor (2) der Elektromotoren einen Sollwert (61) für die Drehzahl vorgibt,
dadurch gekennzeichnet, dass
die Steuereinheit einem Follower-Elektromotor (2') der Elektromotoren den Drehmomentistwert (62) oder den Drehzahlistwert (62) des Master-Elektromotors multipliziert mit einem Lastteilfaktor (64) als Sollwert (63) vorgibt.Comprising roller mill
two parallel, counter-pressed and counter-rotating rollers (1, 1 '), one of the rollers (1') being displaceable orthogonal to the axial direction of this roller (1 '),
two drives, which drives each one of the two rollers (1,1 ') are assigned and each having an electric motor (2,2'), and
a control unit, where
the control unit prescribes a setpoint value (61) for the rotational speed to a master electric motor (2) of the electric motors,
characterized in that
the control unit prescribes to a follower electric motor (2 ') of the electric motors the torque actual value (62) or the actual speed value (62) of the master electric motor multiplied by a load part factor (64) as desired value (63).
zwei parallel angeordnete, gegeneinandergepresste und gegenläufig rotierende Walzen (1,1'), wobei eine der Walzen (1') orthogonal zur axialen Richtung dieser Walze (1') verschiebbar ist, und
zwei Antriebe umfasst, welche Antriebe je einer der beiden Walzen (1,1') zugeordnet sind und je einen Elektromotor (2,2') aufweisen,
dadurch gekennzeichnet, dass das Verfahren folgende Schritte umfasst:
two parallel arranged, pressed against each other and counter-rotating rollers (1,1 '), wherein one of the rollers (1') orthogonal to the axial direction of said roller (1 ') is displaceable, and
comprises two drives, which drives each one of the two rollers (1,1 ') are assigned and each having an electric motor (2,2'),
characterized in that the method comprises the steps of:
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14167575.1A EP2942105A1 (en) | 2014-05-08 | 2014-05-08 | Roller mill and method for controlling a roller mill |
PCT/EP2015/060196 WO2015169950A1 (en) | 2014-05-08 | 2015-05-08 | Roller mill and method for controlling a roller mill |
AU2015257657A AU2015257657B2 (en) | 2014-05-08 | 2015-05-08 | Roller mill and method for controlling a roller mill |
PE2016002183A PE20161555A1 (en) | 2014-05-08 | 2015-05-08 | ROLLER MILL AND METHOD OF CONTROLLING A ROLLER MILL |
CA2948074A CA2948074C (en) | 2014-05-08 | 2015-05-08 | Roller mill and method for controlling a roller mill |
DK15720343.1T DK3140041T3 (en) | 2014-05-08 | 2015-05-08 | Rolling mill and method for controlling a rolling mill |
EP15720343.1A EP3140041B1 (en) | 2014-05-08 | 2015-05-08 | Roller mill and method for controlling a roller mill |
CL2016002734A CL2016002734A1 (en) | 2014-05-08 | 2016-10-27 | Roller mill and method to control a roller mill |
US15/346,296 US10946386B2 (en) | 2014-05-08 | 2016-11-08 | Roller mill and method for controlling a roller mill |
ZA2016/07692A ZA201607692B (en) | 2014-05-08 | 2016-11-08 | Roller mill and method for controlling a roller mill |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14167575.1A EP2942105A1 (en) | 2014-05-08 | 2014-05-08 | Roller mill and method for controlling a roller mill |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2942105A1 true EP2942105A1 (en) | 2015-11-11 |
Family
ID=50679928
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14167575.1A Withdrawn EP2942105A1 (en) | 2014-05-08 | 2014-05-08 | Roller mill and method for controlling a roller mill |
EP15720343.1A Active EP3140041B1 (en) | 2014-05-08 | 2015-05-08 | Roller mill and method for controlling a roller mill |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15720343.1A Active EP3140041B1 (en) | 2014-05-08 | 2015-05-08 | Roller mill and method for controlling a roller mill |
Country Status (9)
Country | Link |
---|---|
US (1) | US10946386B2 (en) |
EP (2) | EP2942105A1 (en) |
AU (1) | AU2015257657B2 (en) |
CA (1) | CA2948074C (en) |
CL (1) | CL2016002734A1 (en) |
DK (1) | DK3140041T3 (en) |
PE (1) | PE20161555A1 (en) |
WO (1) | WO2015169950A1 (en) |
ZA (1) | ZA201607692B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106824387A (en) * | 2017-01-24 | 2017-06-13 | 徐州市诚信破碎机械厂 | A kind of hydraulic combined type disintegrating machine |
CN109289980A (en) * | 2018-11-16 | 2019-02-01 | 南通亚威机械制造有限公司 | A kind of cement roller press |
CN110465394A (en) * | 2019-08-19 | 2019-11-19 | 徐州汉兴再生资源有限公司 | It is a kind of for the grinding device of building waste to can be recycled |
Families Citing this family (4)
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US11020749B2 (en) * | 2018-09-30 | 2021-06-01 | Northeastern University | Servo control device and method for disc gap in disc powder grinding system |
CN110653047A (en) * | 2019-11-05 | 2020-01-07 | 攀钢集团西昌钢钒有限公司 | Coke cutter protection method and device |
GB2601548A (en) * | 2020-12-04 | 2022-06-08 | Weir Minerals Netherlands Bv | Roller controller |
CN115007303B (en) * | 2022-06-21 | 2023-10-20 | 合肥水泥研究设计院有限公司 | Predictive control method and storage medium for roller press pre-grinding system |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4028015A1 (en) | 1990-09-04 | 1992-03-05 | Krupp Polysius Ag | Roller mill for grinding brittle material - has powder fed into gap between rollers to prevent clogging |
DE102011000749A1 (en) | 2011-02-15 | 2012-08-16 | Thyssenkrupp Polysius Ag | Roller mill for crushing brittle materials e.g. limestone, has spur gear and motor that are coupled with grinding rollers through drive shaft |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060288827A1 (en) * | 2005-04-28 | 2006-12-28 | Mitsubishi Heavy Industrial, Ltd. | Method and device for cutting off band-like paper member and controller of the device |
US8833217B2 (en) * | 2007-06-15 | 2014-09-16 | The Bradbury Company, Inc. | Methods and systems to drive rotary presses |
WO2012094219A1 (en) * | 2011-01-08 | 2012-07-12 | Ssi Shredding Systems, Inc. | Controlled feed-rate shredding |
JP2016532561A (en) * | 2013-08-09 | 2016-10-20 | エクストゥルーテック・リミテッド | Powder compression method and roller type compression apparatus |
GB201315451D0 (en) * | 2013-08-30 | 2013-10-16 | Mmd Design & Consult | Mineral breaker |
-
2014
- 2014-05-08 EP EP14167575.1A patent/EP2942105A1/en not_active Withdrawn
-
2015
- 2015-05-08 PE PE2016002183A patent/PE20161555A1/en unknown
- 2015-05-08 CA CA2948074A patent/CA2948074C/en active Active
- 2015-05-08 DK DK15720343.1T patent/DK3140041T3/en active
- 2015-05-08 AU AU2015257657A patent/AU2015257657B2/en active Active
- 2015-05-08 EP EP15720343.1A patent/EP3140041B1/en active Active
- 2015-05-08 WO PCT/EP2015/060196 patent/WO2015169950A1/en active Application Filing
-
2016
- 2016-10-27 CL CL2016002734A patent/CL2016002734A1/en unknown
- 2016-11-08 ZA ZA2016/07692A patent/ZA201607692B/en unknown
- 2016-11-08 US US15/346,296 patent/US10946386B2/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4028015A1 (en) | 1990-09-04 | 1992-03-05 | Krupp Polysius Ag | Roller mill for grinding brittle material - has powder fed into gap between rollers to prevent clogging |
DE102011000749A1 (en) | 2011-02-15 | 2012-08-16 | Thyssenkrupp Polysius Ag | Roller mill for crushing brittle materials e.g. limestone, has spur gear and motor that are coupled with grinding rollers through drive shaft |
Non-Patent Citations (2)
Title |
---|
BRENT JONES: "VFD control methodologies in High Pressure Grinding drive systems", CEMENT INDUSTRY TECHNICAL CONFERENCE, 2012 |
BRENT JONES: "VFD control methodologies in High Pressure Grinding drive systems", CEMENT INDUSTRY TECHNICAL CONFERENCE, 2012, XP002729796 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106824387A (en) * | 2017-01-24 | 2017-06-13 | 徐州市诚信破碎机械厂 | A kind of hydraulic combined type disintegrating machine |
CN106824387B (en) * | 2017-01-24 | 2019-12-24 | 徐州市诚信破碎机械厂 | Hydraulic combined crusher |
CN109289980A (en) * | 2018-11-16 | 2019-02-01 | 南通亚威机械制造有限公司 | A kind of cement roller press |
CN110465394A (en) * | 2019-08-19 | 2019-11-19 | 徐州汉兴再生资源有限公司 | It is a kind of for the grinding device of building waste to can be recycled |
Also Published As
Publication number | Publication date |
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CL2016002734A1 (en) | 2017-07-07 |
US20170050188A1 (en) | 2017-02-23 |
US10946386B2 (en) | 2021-03-16 |
DK3140041T3 (en) | 2018-07-16 |
WO2015169950A1 (en) | 2015-11-12 |
EP3140041A1 (en) | 2017-03-15 |
AU2015257657B2 (en) | 2019-01-17 |
PE20161555A1 (en) | 2017-01-14 |
CA2948074A1 (en) | 2015-11-12 |
AU2015257657A1 (en) | 2016-12-01 |
EP3140041B1 (en) | 2018-04-18 |
ZA201607692B (en) | 2018-04-25 |
CA2948074C (en) | 2022-06-21 |
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