EP2632598B2 - Roller mill - Google Patents

Roller mill Download PDF

Info

Publication number
EP2632598B2
EP2632598B2 EP12713873.3A EP12713873A EP2632598B2 EP 2632598 B2 EP2632598 B2 EP 2632598B2 EP 12713873 A EP12713873 A EP 12713873A EP 2632598 B2 EP2632598 B2 EP 2632598B2
Authority
EP
European Patent Office
Prior art keywords
grinding
roller mill
feed
cone
screw feeder
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.)
Not-in-force
Application number
EP12713873.3A
Other languages
German (de)
French (fr)
Other versions
EP2632598A2 (en
EP2632598B1 (en
Inventor
Michael Keyssner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Loesche GmbH
Original Assignee
Loesche GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=45953057&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2632598(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Loesche GmbH filed Critical Loesche GmbH
Priority to PL12713873T priority Critical patent/PL2632598T3/en
Publication of EP2632598A2 publication Critical patent/EP2632598A2/en
Application granted granted Critical
Publication of EP2632598B1 publication Critical patent/EP2632598B1/en
Publication of EP2632598B2 publication Critical patent/EP2632598B2/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • 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
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/007—Mills with rollers pressed against a rotary horizontal disc
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/02—Feeding devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
    • B02C23/24—Passing gas through crushing or disintegrating zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
    • B02C23/24—Passing gas through crushing or disintegrating zone
    • B02C23/30—Passing gas through crushing or disintegrating zone the applied gas acting to effect material separation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
    • B02C23/24—Passing gas through crushing or disintegrating zone
    • B02C23/32—Passing gas through crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
    • 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
    • B02C2015/002—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs combined with a classifier

Definitions

  • the invention relates to a roller mill according to the preamble of claim 1.
  • the invention is particularly suitable for roller mills, which are provided for grinding of raw coal.
  • Roller mills which roll a grinding bowl or a grinding plate with a grinding track and with spring-loaded grinding rollers which roll on the grinding track or on a grinding bed formed thereon feed material, are used for the comminution of various materials ( DE 102 24 009 B4 . DE 31 003 41 A1 and DE 31 34 601 C2 ).
  • the feed material which is comminuted in a grinding gap between the grinding rollers and the grinding path, can be fed to the grinding chamber and the rotating grinding bowl laterally or centrally.
  • the comminuted material to be ground in an ascending gas stream for example an air stream which reaches the grinding space via a blade ring at the circumference of the grinding bowl, is fed to a sifter arranged above the grinding space. Fine material is discharged in the gas stream, while the coarse material particles are rejected in the classifier and returned via a semolina cone with a bottom cone opening to the central region of the grinding bowl and get under the grinding rollers for recalculation due to the flying force effect.
  • a central feed or task of material to be comminuted in vertical roller mills is carried out vertically from above into the center of the grinding bowl through a feeding trap tube, which is guided centrally through the separator ( US Pat. No. 4,606,506 . DE 195 28 338 C1 ).
  • this feed can be largely prevented by caking even with very moist and sticky feed material, such as raw coal, a clogging of the feed tube.
  • a sifter rotor must be used with a hollow shaft for receiving the task fallopian tube.
  • Such a classifier rotor is considerably more expensive compared to a conventional classifier drive design.
  • the task of the feed material takes place via steeply inclined feed chutes, which are arranged laterally on the classifier and do not extend into the center of the roller mill or grinding chamber (EP 1 239 966 B1 . US Pat. No. 4,597,537 ).
  • feed chutes which are arranged laterally on the classifier and do not extend into the center of the roller mill or grinding chamber.
  • the strong inclination of the feed chute prevents at the same time a discharge parabola for the raw coal into the center of the grinding bowl.
  • the sifter and the lateral task chute would have to be positioned considerably higher.
  • the feed material such as raw coal
  • Disadvantageous consequences are an uneven grinding roller load and a reduced running smoothness of the roller mill as well as a lower energy efficiency of the grinding process. Incomplete supply of the raw coal to the grinding rollers and comminution can also lead to deposits of coal dust and a fire hazard.
  • Out EP 0 294 609 A2 is a roller mill with two grinding rollers known, which is intended for a relatively small throughput and, for example, as a laboratory mill.
  • the desired simple and inexpensive construction relates to training and arrangement of the roller carrier and its storage.
  • the roller carrier crosses the mill housing above the Mahltellers diametrically and has a central part with a central through-opening for feed material, which is placed over a centrally arranged in a cover of the roller mill feed nozzle.
  • An alternative roller mill is provided with an air sifter and a semolina cone.
  • horizontally arranged tube screw conveyor ends in a region of the cone wall, so that supplied feed material along the cone wall can reach a cone opening and centered on the grinding table.
  • Out JP 2000 237 614 A is an air flow roller mill with an additional classifying air flow for varying the grain size distribution, which is supplied tangentially above the grinding rollers, but below the viewing space.
  • the variable particle size distribution also serves to discharge coarse material rejected in the classifier by means of a horizontal screw conveyor which runs directly below the semolina cone opening.
  • the feed to be crushed passes through a screw conveyor, which ends in a vertical discharge pipe of the semolina cone or in the area between the grinding rollers and the semolina cone, centrally on the grinding bowl.
  • JP 2000 312 832 A is a vertical mill with a sifter rotor, but shown without a semolina cone.
  • the feed material passes through a feed line and a horizontal screw conveyor, which ends between two grinding rollers, into the grinding chamber.
  • the screw conveyor is mounted on the side of the mill housing and with its opening does not reach into the mill center.
  • the invention has for its object to provide a roller mill, in particular a coal mill, which ensures a continuous, uniform and cost-effective task / supply of the feed material and a trouble-free, efficient grinding process.
  • the invention is based on a roller mill, in particular an air-flow roller mill for grinding raw coal, with a feed system which supplies the raw coal to the center of the roller mill, in particular into the center of the grinding bowl, which is advantageously provided with a defined distribution area , guaranteed.
  • a feed system which supplies the raw coal to the center of the roller mill, in particular into the center of the grinding bowl, which is advantageously provided with a defined distribution area , guaranteed.
  • the feed material in the center of the semolina cone which is located above the grinding chamber and below a classifier, discarded, so that the feed material passes together with the rejected by the sifter coarse material in the center of the grinding bowl and is evenly distributed to all grinding rollers.
  • the worm shaft of the worm feeder is connected at one end to a drive device and mounted at the other end in a storage.
  • the drive device and the bearing of the worm shaft are arranged outside the roller mill.
  • the storage of the worm shaft outside the roller mill or the grinding / sighting space largely prevents contamination by coal dust.
  • roller mill with a screw feeder consist in addition to a continuous, uniform and trouble-free feeding of the feed material into the center of the grinding bowl and a uniform distribution of the feed material together with rejected in the classifier coarse grain on the grinding bowl and under the grinding rollers in an energy saving for the milling process. Energy savings of up to 5% compared to the previously used task arrangements are possible. In addition, a trouble-free and reliable, continuous material task is ensured.
  • the screw feeder as a tube screw conveyor and to guide substantially horizontally through the roller mill and the semolina cone.
  • the drive device and the bearing of the worm shaft can be arranged on a support structure on the mill housing.
  • a seal between the rotating worm shaft and the mill housing can be carried out advantageously in a mechanical manner or by means of sealing gas.
  • the worm shaft is provided outside a conveying trough of the worm feeder with a protective tube which extends from a milling chamber-side end region of the worm feeder to close to the bearing of the worm shaft outside the rolling mill.
  • the drive device for example a motor with a gearbox, can be operated at a constant or controllable speed, for example by means of a frequency converter, be executed.
  • a mill outside end portion of the screw feeder is provided outside the roller mill with the laterally arranged drive means, while a Mahlraumscher end portion is arranged in the semolina cone of the roller mill.
  • the outer wall end region of the screw feeder is provided with a receiving opening, via which the feed material in the screw feeder and with the help of the worm gear in a forced conveyance to the center of the roller mill, which is determined by the longitudinal axis of the roller mill passes ,
  • the milling space-side end region of the screw feeder has an ejection opening, which is designed and dimensioned coaxially with the longitudinal axis of the roller mill for the central feed of the feed material.
  • Such a supply and uniform distribution of the feed material, preferably together with the rejected in the classifier coarse grain, allows an energetically extremely advantageous grinding process.
  • the uniform distribution of the feed material to be crushed also improves the smooth running of the roller mill and allows a better adjustment of the setting parameters for the grinding.
  • the worm gear, the conveyor trough and a cover or the tube screw conveyor from the outer end of the mill outside to the milling room side end range, while the worm shaft from the outside drive means, which is particularly close to the receiving opening, extends to the storage outside the roller mill at the opposite end ,
  • the screw feeder is connected via its receiving opening in the outer wall end region with a feed channel for the feed material.
  • This feed channel can expediently be arranged substantially vertically and have at the upper end a rotary valve which serves as an air seal.
  • the feed channel of the feed system may be formed in a simple construction as a closed pipe.
  • the feed material can then fall from the rotary feeder via the closed feed channel and the receiving opening in the screw conveyor or in the conveyor trough, to then transported by means of the worm gear to the trough-side ejection opening and dropping vertically down the grinding bowl centrally.
  • the roller mill 2 has a grinding bowl 4, which rotates about a longitudinal axis 20.
  • the grinding bowl 4 is provided with a grinding path 26 on which a grinding bed is formed from the feed material to be crushed (not shown).
  • a suspension system (not shown) force-loaded grinding rollers 6 roll off and crush the feed material 5, which is supplied by means of a feed system.
  • grinding roller 6 In the drawing figure, only one grinding roller 6 is shown schematically. In principle, two, three, four or more grinding rollers can be arranged.
  • the comminuted regrind (not shown) is in an ascending gas flow (not shown), which is supplied via a blade ring 28 on the circumference of the grinding bowl 4 the grinding chamber 3, a classifier 7, which arranged above the grinding chamber 3 and in this embodiment in the roller mill 2 is integrated, fed to the classification.
  • the classifier 7 is provided with a rotor 30 which rotates about the longitudinal axis 20 and has sight strips 31. Concentrically around the sifter rotor 30, a Leiterielkranz 33 is arranged to form a viewing space 32.
  • the semolina cone 8 has on the bottom side a central cone opening 9, which allows a central supply of the coarse grain to the grinding bowl 4 or to a central distribution region 24 of the grinding bowl 4 and a uniform feed to the grinding rolls 6.
  • the central distribution region 24 is frusto-conical. Uniform distribution of the coarse grain and the feed material 5 supplied by means of the feed system is ensured by uniformly discharging the feed material 5 and the coarse grain via the conical distribution region 24 or displacement body and on the grinding bowl 4 under centrifugal force in the direction of the grinding path 26 and below the grinding rolls 6 reach.
  • the feeding system for an energy-efficient, central and uniform feeding of the feed 5 into the grinding chamber 3 and on the grinding path 26 of the grinding bowl 4 has a screw feeder 10.
  • the screw feeder 10 is arranged substantially horizontally and integrated into the roller mill 2 in the region of the semolina cone 8.
  • the screw feeder 10 is connected outside the roller mill 2 with a supply channel 19, which is arranged almost perpendicularly on the outside of the roller mill 2 or on the separator 7.
  • a compensator (not shown) for vibration isolation of the feed system, in particular of the screw feeder 10, may be arranged by the roller mill 2.
  • the screw feeder 10 has a worm shaft 12, which is guided by the roller mill 2 and the semolina cone 8 and thereby cuts the longitudinal axis 20 of the roller mill.
  • a conveyor trough 11 and a cover 21 of the screw feeder 10 which may also be designed as a tube worm conveyor.
  • the screw feeder 10 is arranged with a mill outside end portion 25 outside the roller mill 2, while a milling space side end portion 27 in the center of the roller mill 2 and the grinding chamber 3 is arranged.
  • the task of the feed material 5 from the vertical feed channel 19 in the screw feeder 10 takes place via a receiving opening 15 in the outer wall end portion 25 by the feed material 5 falls into the conveyor trough 11 and with the help of the worm gear 29 from the mills outer side end portion 25 to the milling space end portion 27 and a discharge opening 17 formed here is forcibly conveyed. Forced delivery prevents caking and blockages.
  • the ejection opening 17 are located in the conveyor trough 11 are above the cone opening 9 and is coaxial with the longitudinal axis 20 of the roller mill, so that the feed material 5 together with the coarse grain on the cone opening 9 on the central distribution area 24 of the grinding bowl 4 and from here evenly on the grinding path 26 comes to shredding.
  • the worm shaft 12 is provided outside the conveyor trough 11 and the cover 21 or outside of the tube worm conveyor with a protective tube 16 which extends to close to a bearing 14 for the worm shaft 12. Seals (not shown) of the worm shaft 12 opposite the fixed mill housing 22 may be provided.
  • a drive device 13 outside the roller mill 2 is connected to the opposite end of the bearing 14 of the worm shaft 12 and may be arranged as the bearing 14 on a support structure 18 of the roller mill 2.

Landscapes

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

Description

Die Erfindung betrifft eine Wälzmühle gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a roller mill according to the preamble of claim 1.

Die Erfindung ist insbesondere für Wälzmühlen geeignet, welche zur Vermahlung von Rohkohle vorgesehen sind.The invention is particularly suitable for roller mills, which are provided for grinding of raw coal.

Wälzmühlen, welche eine Mahlschüssel beziehungsweise einen Mahlteller mit einer Mahlbahn und mit federnd beaufschlagten Mahlwalzen, welche auf der Mahlbahn beziehungsweise auf einem darauf von zugeführtem Aufgabematerial gebildeten Mahlbett abrollen, werden zur Zerkleinerung unterschiedlichster Materialien verwendet ( DE 102 24 009 B4 , DE 31 003 41 A1 und DE 31 34 601 C2 ).Roller mills, which roll a grinding bowl or a grinding plate with a grinding track and with spring-loaded grinding rollers which roll on the grinding track or on a grinding bed formed thereon feed material, are used for the comminution of various materials ( DE 102 24 009 B4 . DE 31 003 41 A1 and DE 31 34 601 C2 ).

Das Aufgabematerial, welches in einem Mahlspalt zwischen den Mahlwalzen und der Mahlbahn zerkleinert wird, kann dem Mahlraum und der rotierenden Mahlschüssel seitlich oder zentral aufgegeben werden.The feed material, which is comminuted in a grinding gap between the grinding rollers and the grinding path, can be fed to the grinding chamber and the rotating grinding bowl laterally or centrally.

Bei Luftstrom-Wälzmühlen wird das zerkleinerte Mahlgut in einem aufsteigenden Gasstrom, beispielsweise einem Luftstrom, welcher über einen Schaufelkranz am Umfang der Mahlschüssel in den Mahlraum gelangt, einem über dem Mahlraum angeordneten Sichter zugeführt. Feingut wird im Gasstrom ausgetragen, während die Grobgutpartikel im Sichter abgewiesen und über einen Grießekonus mit einer bodenseitigen Konusöffnung dem zentralen Bereich der Mahlschüssel zurückgeführt werden und aufgrund der Fliegkraftwirkung unter die Mahlwalzen zur erneuten Vermahlung gelangen.In the case of air-flow roller mills, the comminuted material to be ground in an ascending gas stream, for example an air stream which reaches the grinding space via a blade ring at the circumference of the grinding bowl, is fed to a sifter arranged above the grinding space. Fine material is discharged in the gas stream, while the coarse material particles are rejected in the classifier and returned via a semolina cone with a bottom cone opening to the central region of the grinding bowl and get under the grinding rollers for recalculation due to the flying force effect.

Eine zentrale Zuführung oder Aufgabe von zu zerkleinerndem Material in vertikale Wälzmühlen erfolgt senkrecht von oben in das Zentrum der Mahlschüssel durch ein Aufgabefallrohr, welches mittig durch den Sichter geführt wird ( US A 4,606,506 , DE 195 28 338 C1 ). Bei dieser Zuführung kann in der Regel auch bei sehr feuchtem und klebrigem Aufgabematerial, beispielsweise Rohkohle, eine Verstopfung des Aufgaberohres durch Anbackungen weitgehend verhindert werden. Nachteilig ist jedoch, dass ein Sichterrotor mit einer Hohlwelle zur Aufnahme des Aufgabefallrohres eingesetzt werden muss. Ein derartiger Sichterrotor ist im Vergleich zu einer konventionellen Sichterantriebskonstruktion erheblich kostenintensiver. Für relativ große Sichter mit einem Fallrohrdurchmesser > 1 m ist zudem eine wirtschaftliche Umsetzung aufgrund der erforderlichen hohen Umfangsgeschwindigkeiten mit außenverzahnten Axial-Rollenlagern nicht möglich. Weiterhin ist die Höhe des Aufgabepunktes für das Aufgabematerial oberhalb des Sichters wegen der längeren und in der erforderlichen Höhe auszuführenden Förderwege und dem damit verbundenen Investitions- und Energiebedarf nachteilig.A central feed or task of material to be comminuted in vertical roller mills is carried out vertically from above into the center of the grinding bowl through a feeding trap tube, which is guided centrally through the separator ( US Pat. No. 4,606,506 . DE 195 28 338 C1 ). In this feed can be largely prevented by caking even with very moist and sticky feed material, such as raw coal, a clogging of the feed tube. The disadvantage, however, that a sifter rotor must be used with a hollow shaft for receiving the task fallopian tube. Such a classifier rotor is considerably more expensive compared to a conventional classifier drive design. For relatively large classifier with a downpipe diameter> 1 m also an economic implementation due to the required high peripheral speeds with external gear axial roller bearings is not possible. Furthermore, the height of the application point for the feed material above the classifier is disadvantageous because of the longer and in the required height to be executed delivery routes and the associated investment and energy needs.

Insbesondere bei großen Mühlen- und Sichtereinheiten erfolgt die Aufgabe des Aufgabematerials über stark geneigte Aufgabeschurren, welche seitlich am Sichter angeordnet sind und nicht bis in das Zentrum der Wälzmühle beziehungsweise des Mahlraumes reichen ( EP 1 239 966 B1 , US A 4,597,537 ). Bei derartigen Aufgabeanordnungen ist die Gefahr von Anbackungen in der Aufgabeschurre gegeben. Die starke Neigung der Aufgabeschurre verhindert gleichzeitig eine Abwurfparabel für die Rohkohle in das Zentrum der Mahlschüssel. Hierzu müsste der Sichter und die seitliche Aufgabeschurre erheblich höher positioniert werden. Das Aufgabematerial, beispielsweise Rohkohle, fällt aus der Aufgabeschurre seitlich auf die Mahlschüssel und gelangt nicht zentral auf einen Streuteller oder auf einen kegelstumpfförmig ausgebildeten Verteilungskörper im Zentrum der Mahlschüssel und kann dadurch nicht gleichmäßig allen Mahlwalzen zur Zerkleinerung zugeführt werden. Nachteilige Folgen sind eine ungleichmäßige Mahlwalzenbelastung und eine verringerte Laufruhe der Wälzmühle sowie eine geringere Energieeffizienz des Mahlprozesses. Eine unvollständige Zuführung der Rohkohle zu den Mahlwalzen und zur Zerkleinerung kann zudem zu Ablagerungen von Kohlestaub und zu einer Brandgefahr führen.Particularly in the case of large mill and classifier units, the task of the feed material takes place via steeply inclined feed chutes, which are arranged laterally on the classifier and do not extend into the center of the roller mill or grinding chamber ( EP 1 239 966 B1 . US Pat. No. 4,597,537 ). In such task arrangements the risk of caking in the task chute is given. The strong inclination of the feed chute prevents at the same time a discharge parabola for the raw coal into the center of the grinding bowl. For this purpose, the sifter and the lateral task chute would have to be positioned considerably higher. The feed material, such as raw coal, falls from the feed chute laterally on the grinding bowl and does not arrive centrally on a spreading plate or on a frusto-conical distribution body in the center of the grinding bowl and can not be uniformly fed to all grinding rolls for crushing. Disadvantageous consequences are an uneven grinding roller load and a reduced running smoothness of the roller mill as well as a lower energy efficiency of the grinding process. Incomplete supply of the raw coal to the grinding rollers and comminution can also lead to deposits of coal dust and a fire hazard.

In DE 19 38 772 C3 ist eine Wälzmühle mit einem integrierten Windsichter und mit einer Gutzuführrinne beschrieben, welche stark geneigt ist und die Mühlen- und Trichterwand des Sichters durchsetzt. Die Gutzuführrinne endet außermittig im Trichterauslauf, und das Aufgabematerial gelangt mit dem im Sichter abgewiesenen Grobkorn über einen zentralen Aufgabestutzen auf einen Verteilerkegel im Zentrum der Mahlbahn. Die Gutzuführrinne soll für eine vollständige und gleichmäßige Materialzuführung als pneumatische oder Vibrations-Förderrinne ausgebildet sein.In DE 19 38 772 C3 is described a roller mill with an integrated air classifier and with a Gutzuführrinne, which is highly inclined and passes through the mill and funnel wall of the classifier. The Gutzuführrinne ends off-center in the hopper outlet, and the feed material passes with the rejected in the classifier coarse grain via a central feed nozzle on a distributor cone in the center of the grinding path. The Gutzuführrinne should be designed for a complete and uniform material supply as a pneumatic or vibration conveyor trough.

Bei kleineren Kohlemühlen ist eine laterale Aufgabeanordnung mittels eines horizontalen Rohrschneckenförderers am Mühlenoberteil üblich. Wenn das Schneckenrohr am Mühlengehäuse endet, wird das Aufgabematerial außermittig der Mahlschüssel aufgegeben. Die Rohkohle muss durch den aufwärts strömenden Gasstrom erfasst und im Mahlraum verteilt werden, bevor eine Zerkleinerung im Mahlspalt zwischen den Mahlwalzen und der Mahlschüssel bzw. Mahlbahn erfolgen kann. Die Austrittsgeschwindigkeit des Gasstroms aus dem die Mahlschüssel umgebenden Schaufelkranz muss entsprechend hoch eingestellt werden, damit die aufgegebene, grobstückige Rohkohle unter dem Einfluss der Gravitationskraft nicht entgegen diesem Gasstrom durch den Schaufelkranz in einen Rejectaustrag unterhalb der Mahlschüssel fallen kann ohne dem Zerkleinerungsprozess zu unterliegen. Sowohl die Ungleichverteilung der aufgegebenen Rohkohle im Mahlraum als auch die erhöhte Gasgeschwindigkeit zur Vermeidung des Materialausfalls über den Schaufelkranz erfordern zudem einen erhöhten Energieaufwand.For smaller coal mills, a lateral feed arrangement by means of a horizontal pipe worm conveyor on the top of the mill is common. When the screw tube ends at the mill housing, the feed material is off-center of the grinding bowl abandoned. The raw coal must be detected by the upflowing gas stream and distributed in the grinding chamber, before a comminution can take place in the grinding gap between the grinding rolls and the grinding bowl or grinding path. The exit velocity of the gas stream from the blade ring surrounding the blade ring must be set high enough so that the abandoned, lumpy raw coal under the influence of gravitational force can not fall contrary to this gas flow through the blade ring in a reject discharge below the grinding bowl without subjecting the crushing process. Both the unequal distribution of abandoned raw coal in the grinding chamber and the increased gas velocity to avoid material failure via the blade ring also require an increased energy expenditure.

Aus EP 0 294 609 A2 ist eine Wälzmühle mit zwei Mahlwalzen bekannt, welche für eine relativ kleine Durchsatzleistung und beispielsweise als Labormühle vorgesehen ist. Die angestrebte einfache und kostengünstige Konstruktion betrifft Ausbildung und Anordnung des Walzenträgers und dessen Lagerung. Der Walzenträger durchquert das Mühlengehäuse oberhalb des Mahltellers diametral und weist ein Mittelteil mit einer zentralen Durchgangsöffnung für Aufgabegut auf, welches über einen mittig in einer Abdeckung der Wälzmühle angeordneten Aufgabestutzen aufgegeben wird. Eine alternative Wälzmühle ist mit einem Windsichter und einem Grießekonus versehen. Ein nur in einer Figur gezeigter, horizontal angeordneter Rohrschneckenförderer endet in einem Bereich der Konuswand, so dass zugeführtes Aufgabegut entlang der Konuswand zu einer Konusöffnung und mittig auf den Mahlteller gelangen kann.Out EP 0 294 609 A2 is a roller mill with two grinding rollers known, which is intended for a relatively small throughput and, for example, as a laboratory mill. The desired simple and inexpensive construction relates to training and arrangement of the roller carrier and its storage. The roller carrier crosses the mill housing above the Mahltellers diametrically and has a central part with a central through-opening for feed material, which is placed over a centrally arranged in a cover of the roller mill feed nozzle. An alternative roller mill is provided with an air sifter and a semolina cone. An only shown in a figure, horizontally arranged tube screw conveyor ends in a region of the cone wall, so that supplied feed material along the cone wall can reach a cone opening and centered on the grinding table.

Aus JP 2000 237 614 A geht eine Luftstrom-Wälzmühle mit einem zusätzlichen Sichtluftstrom zum Variieren der Korngrößenverteilung hervor, welcher oberhalb der Mahlwalzen, jedoch unterhalb des Sichtraums, tangential zugeführt wird. Der variablen Korngrößenverteilung dient auch die Abführung vom im Sichter abgewiesenen Grobgut mit Hilfe eines horizontalen Schneckenförderers, welcher unmittelbar unterhalb der Grießekonusöffnung verläuft. Das zu zerkleinernde Aufgabegut gelangt über einen Schneckenförderer, welcher in einem vertikalen Austragsrohr des Grießekonus oder im Bereich zwischen den Mahlwalzen und dem Grießekonus endet, zentral auf die Mahlschüssel.Out JP 2000 237 614 A is an air flow roller mill with an additional classifying air flow for varying the grain size distribution, which is supplied tangentially above the grinding rollers, but below the viewing space. The variable particle size distribution also serves to discharge coarse material rejected in the classifier by means of a horizontal screw conveyor which runs directly below the semolina cone opening. The feed to be crushed passes through a screw conveyor, which ends in a vertical discharge pipe of the semolina cone or in the area between the grinding rollers and the semolina cone, centrally on the grinding bowl.

In JP 2000 312 832 A ist eine Vertikalmühle mit einem Sichterrotor, jedoch ohne einen Grießekonus gezeigt. Das Aufgabegut gelangt über eine Zuführungsleitung und einen horizontalen Schneckenförderer, welcher zwischen zwei Mahlwalzen endet, in den Mahlraum. Der Schneckenförderer ist seitlich am Mühlengehäuse montiert und reicht mit seiner Öffnung nicht bis in das Mühlenzentrum.In JP 2000 312 832 A is a vertical mill with a sifter rotor, but shown without a semolina cone. The feed material passes through a feed line and a horizontal screw conveyor, which ends between two grinding rollers, into the grinding chamber. The screw conveyor is mounted on the side of the mill housing and with its opening does not reach into the mill center.

Konstruktionsbedingt können die einseitig am Mühlengehäuse montierten Schneckenförderer nicht in jedem Fall eine ungestörte Zuführung des Aufgabeguts gewährleisten. Eine zusätzliche Montage in der Grießekonuswand ist relativ aufwändig und nicht geeignet, in jedem Fall eine vollständige, gleichmäßige und kontinuierliche Materialaufgabe zu sichern.Due to the design, the screw conveyors mounted on one side of the mill housing can not always ensure undisturbed feeding of the feed material. An additional assembly in the semolina wall is relatively complex and not suitable, in any case to ensure a complete, uniform and continuous material task.

Der Erfindung liegt die Aufgabe zugrunde, eine Wälzmühle, insbesondere eine Kohlemühle, zu schaffen, welche eine kontinuierliche, gleichmäßige und kostengünstige Aufgabe/Zuführung des Aufgabematerials und einen störungsfreien, effizienten Mahlprozess gewährleistet.The invention has for its object to provide a roller mill, in particular a coal mill, which ensures a continuous, uniform and cost-effective task / supply of the feed material and a trouble-free, efficient grinding process.

Erfindungsgemäß wird die Aufgabe durch die Merkmale des Anspruchs 1 gelöst. Zweckmäßige und vorteilhafte Ausgestaltungen sind in den Unteransprüchen und in der Figurenbeschreibung enthalten.According to the invention the object is achieved by the features of claim 1. Advantageous and advantageous embodiments are contained in the subclaims and in the description of the figures.

Der Erfindung geht von einer Wälzmühle, insbesondere einer Luftstrom-Wälzmühle zur Vermahlung von Rohkohle, mit einem Aufgabesystem aus, welches eine Zuführung der Rohkohle in das Zentrum der Wälzmühle, insbesondere in das Zentrum der Mahlschüssel, welche hier vorteilhaft mit einem definiert ausgebildeten Verteilungsbereich versehen ist, gewährleistet. Dabei wird das Aufgabematerial im Zentrum des Grießekonus, welcher oberhalb des Mahlraums und unterhalb eines Sichters angeordnet ist, abgeworfen, so dass das Aufgabematerial zusammen mit dem vom Sichterrotor abgewiesenen Grobgut in das Zentrum der Mahlschüssel gelangt und gleichmäßig auf alle Mahlwalzen verteilt wird.The invention is based on a roller mill, in particular an air-flow roller mill for grinding raw coal, with a feed system which supplies the raw coal to the center of the roller mill, in particular into the center of the grinding bowl, which is advantageously provided with a defined distribution area , guaranteed. In this case, the feed material in the center of the semolina cone, which is located above the grinding chamber and below a classifier, discarded, so that the feed material passes together with the rejected by the sifter coarse material in the center of the grinding bowl and is evenly distributed to all grinding rollers.

Ausgehend von einem Aufgabesystem mit einem Schneckenaufgeber, welcher in den Grießekonus integriert und derart ausgebildet beziehungsweise angeordnet ist, dass das Aufgabegut sowohl in die Wälzmühle hinein gefördert als auch der Mahlschüssel zentral aufgegeben wird, ist erfindungsgemäß in einer konstruktiv besonders einfachen und wirkungsvollen Anordnung vorgesehen, dass der Schneckenaufgeber mit einer Schneckenwelle aufweist, welche die Längsachse der Wälzmühle schneidet und beidendseitig jeweils außerhald der Wälzmühle angeordnet ist.Starting from a feed system with a screw feeder, which is integrated into the semolina cone and designed or arranged so that the feed material both promoted into the roller mill and the grinding bowl is centrally abandoned, is provided according to the invention in a structurally particularly simple and effective arrangement that the screw feeder having a worm shaft which intersects the longitudinal axis of the roller mill and is arranged at both ends each outside the roller mill.

Gemäß der Erfindung ist die Schneckenwelle des Schneckenaufgebers an einem Ende mit einer Antriebseinrichtung verbunden und am anderen Ende in einer Lagerung gelagert. Erfindungsgemäß sind die Antriebseinrichtung und die Lagerung der Schneckenwelle außerhalb der Wälzmühle angeordnet.According to the invention, the worm shaft of the worm feeder is connected at one end to a drive device and mounted at the other end in a storage. According to the invention, the drive device and the bearing of the worm shaft are arranged outside the roller mill.

Die Lagerung der Schneckenwelle außerhalb der Wälzmühle beziehungsweise des Mahl-/Sichtraumes verhindert weitgehend eine Verschmutzung durch Kohlenstaub.The storage of the worm shaft outside the roller mill or the grinding / sighting space largely prevents contamination by coal dust.

Vorteile der Wälzmühle mit einem Schneckenaufgeber gemäß der Erfindung bestehen neben einer kontinuierlichen, gleichmäßigen und störungsfreien Zuführung des Aufgabematerials in das Zentrum der Mahlschüssel und einer gleichmäßigen Verteilung des Aufgabematerials zusammen mit dem im Sichter abgewiesenen Grobkorn auf die Mahlschüssel und unter die Mahlwalzen in einer Energieeinsparung für den Mahlprozess. Energieeinsparungen bis zu 5 % gegenüber den bisher eingesetzten Aufgabeanordnungen sind möglich. Außerdem wird eine störungsfreie und zuverlässige, kontinuierliche Materialaufgabe gewährleistet.Advantages of the roller mill with a screw feeder according to the invention consist in addition to a continuous, uniform and trouble-free feeding of the feed material into the center of the grinding bowl and a uniform distribution of the feed material together with rejected in the classifier coarse grain on the grinding bowl and under the grinding rollers in an energy saving for the milling process. Energy savings of up to 5% compared to the previously used task arrangements are possible. In addition, a trouble-free and reliable, continuous material task is ensured.

Es ist zweckmäßig, den Schneckenaufgeber als Rohrschneckenförderer auszubilden und im Wesentlichen horizontal durch die Wälzmühle und den Grießekonus zu führen.It is expedient to design the screw feeder as a tube screw conveyor and to guide substantially horizontally through the roller mill and the semolina cone.

Es ist von Vorteil, dass die Antriebseinrichtung und die Lagerung der Schneckenwelle auf einer Unterstützungskonstruktion am Mühlengehäuse angeordnet werden können.It is advantageous that the drive device and the bearing of the worm shaft can be arranged on a support structure on the mill housing.

Eine Abdichtung zwischen der rotierenden Schneckenwelle und dem Mühlengehäuse kann vorteilhaft in mechanischer Weise oder mittels Sperrgas erfolgen.A seal between the rotating worm shaft and the mill housing can be carried out advantageously in a mechanical manner or by means of sealing gas.

Zweckmäßigerweise ist die Schneckenwelle außerhalb eines Fördertroges des Schneckenaufgebers mit einem Schutzrohr versehen, welches von einem mahlraumseitigen Endbereich des Schneckenaufgebers bis nahe an die Lagerung der Schneckenwelle außerhalb der Wälzmühle reicht.Expediently, the worm shaft is provided outside a conveying trough of the worm feeder with a protective tube which extends from a milling chamber-side end region of the worm feeder to close to the bearing of the worm shaft outside the rolling mill.

Die Antriebseinrichtung, beispielsweise ein Motor mit Getriebe, kann mit konstanter oder regelbarer Drehzahl, beispielsweise mittels Frequenzumrichter, ausgeführt werden.The drive device, for example a motor with a gearbox, can be operated at a constant or controllable speed, for example by means of a frequency converter, be executed.

Ein mühlenaußenseitiger Endbereich des Schneckenaufgebers ist außerhalb der Wälzmühle mit der seitlich angeordneten Antriebseinrichtung versehen, während ein mahlraumseitiger Endbereich im Grießekonus der Wälzmühle angeordnet ist.A mill outside end portion of the screw feeder is provided outside the roller mill with the laterally arranged drive means, while a Mahlraumseitiger end portion is arranged in the semolina cone of the roller mill.

Um Aufgabegut in die Wälzmühle hineinzufördern, ist der mühlenaußenseitige Endbereich des Schneckenaufgebers mit einer Aufnahmeöffnung versehen, über welche das Aufgabegut in den Schneckenaufgeber und mit Hilfe des Schneckengetriebes in einer Zwangsförderung bis in das Zentrum der Wälzmühle, welches von der Längsachse der Wälzmühle bestimmt ist, gelangt.In order to feed feed material into the roller mill, the outer wall end region of the screw feeder is provided with a receiving opening, via which the feed material in the screw feeder and with the help of the worm gear in a forced conveyance to the center of the roller mill, which is determined by the longitudinal axis of the roller mill passes ,

Der mahlraumseitige Endbereich des Schneckenaufgebers weist eine Auswurföffnung auf, welche für die zentrale Zuführung des Aufgabegutes koaxial zur Längsachse der Wälzmühle ausgebildet und dimensioniert ist. Nach der Zwangsförderung des im Rohrtrog oder Fördertrog des Schneckenaufgebers transportierten Aufgabematerials kann dieses Material sehr genau und zuverlässig durch die zentral angeordnete, definiert bemessene, trogseitige Auswurföffnung senkrecht nach unten auf die Mahlschüssel und den hier ausgebildeten zentralen Verteilungsbereich fallen und gleichmäßig den Mahlwalzen zugeführt werden.The milling space-side end region of the screw feeder has an ejection opening, which is designed and dimensioned coaxially with the longitudinal axis of the roller mill for the central feed of the feed material. After the forced conveyance of the feed material transported in the trough or conveyor trough of the worm feeder, this material can fall very precisely and reliably through the centrally arranged, defined, trough-side ejection opening vertically downwards onto the grinding bowl and the central distribution area formed here and can be fed evenly to the grinding rolls.

Eine derartige Zuführung und gleichmäßige Verteilung des Aufgabematerials, vorzugsweise zusammen mit dem im Sichter abgewiesenen Grobkorn, ermöglicht einen energetisch außerordentlich vorteilhaften Mahlprozess. Die gleichmäßige Verteilung des zu zerkleinernden Aufgabematerials verbessert zudem die Laufruhe der Wälzmühle und erlaubt eine bessere Justierung der Einstellparameter für die Vermahlung.Such a supply and uniform distribution of the feed material, preferably together with the rejected in the classifier coarse grain, allows an energetically extremely advantageous grinding process. The uniform distribution of the feed material to be crushed also improves the smooth running of the roller mill and allows a better adjustment of the setting parameters for the grinding.

Zweckmässigerweise reichen das Schneckengetriebe, der Fördertrog und eine Abdeckung beziehungsweise der Rohrschneckenförderer von dem mühlenaußenseitigen Endbereich bis zu dem mahlraumseitigen Endbereich, während die Schneckenwelle von der außenseitigen Antriebseinrichtung, welche insbesondere nahe der Aufnahmeöffnung angeordnet ist, bis zu der Lagerung außerhalb der Wälzmühle am gegenüberliegenden Endbereich reicht.Conveniently, the worm gear, the conveyor trough and a cover or the tube screw conveyor from the outer end of the mill outside to the milling room side end range, while the worm shaft from the outside drive means, which is particularly close to the receiving opening, extends to the storage outside the roller mill at the opposite end ,

Es ist vorteilhaft, wenn der Schneckenaufgeber über seine Aufnahmeöffnung im mühlenaußenseitigen Endbereich mit einem Zuführungskanal für das Aufgabematerial verbunden ist. Dieser Zuführungskanal kann zweckmäßigerweise im Wesentlichen senkrecht angeordnet sein und am oberen Ende eine Zellenradschleuse aufweisen, welche als Luftabschluss dient.It is advantageous if the screw feeder is connected via its receiving opening in the outer wall end region with a feed channel for the feed material. This feed channel can expediently be arranged substantially vertically and have at the upper end a rotary valve which serves as an air seal.

Der Zuführungskanal des Aufgabesystems kann in einer einfachen Konstruktion als eine geschlossene Rohrleitung ausgebildet sein. Das Aufgabematerial kann dann aus der Zellenradschleuse über den geschlossenen Zuführungskanal und über die Aufnahmeöffnung in den Schneckenförderer beziehungsweise in den Fördertrog fallen, um dann mit Hilfe des Schneckengetriebs bis zur trogseitigen Auswurföffnung transportiert und senkrecht nach unten fallend der Mahlschüssel zentral aufgegeben zu werden.The feed channel of the feed system may be formed in a simple construction as a closed pipe. The feed material can then fall from the rotary feeder via the closed feed channel and the receiving opening in the screw conveyor or in the conveyor trough, to then transported by means of the worm gear to the trough-side ejection opening and dropping vertically down the grinding bowl centrally.

Die Erfindung wird nachstehend anhand einer Zeichnung weiter erläutert. In der einzigen Figur ist eine Wälzmühle gemäß der Erfindung stark schematisiert und ausschnittsweise gezeigt.The invention will be explained below with reference to a drawing. In the single figure, a roller mill according to the invention is highly schematic and fragmentary shown.

Die Wälzmühle 2 weist eine Mahlschüssel 4 auf, welche um eine Längsachse 20 rotiert. Die Mahlschüssel 4 ist mit einer Mahlbahn 26 versehen, auf welcher vom zu zerkleinernden Aufgabematerial ein Mahlbett gebildet wird (nicht dargestellt). Auf diesem Mahlbett rollen stationär angeordnete und mit Hilfe eines Federungssystems (nicht dargestellt) kraftbeaufschlagte Mahlwalzen 6 ab und zerkleinern das Aufgabematerial 5, welches mit Hilfe eines Aufgabesystems zugeführt wird.The roller mill 2 has a grinding bowl 4, which rotates about a longitudinal axis 20. The grinding bowl 4 is provided with a grinding path 26 on which a grinding bed is formed from the feed material to be crushed (not shown). On this grinding bed stationarily arranged and by means of a suspension system (not shown) force-loaded grinding rollers 6 roll off and crush the feed material 5, which is supplied by means of a feed system.

In der Zeichnungsfigur ist lediglich eine Mahlwalze 6 schematisch dargestellt. Grundsätzlich können zwei, drei, vier oder mehr Mahlwalzen angeordnet sein.In the drawing figure, only one grinding roller 6 is shown schematically. In principle, two, three, four or more grinding rollers can be arranged.

Das zerkleinerte Mahlgut (nicht dargestellt) wird in einem aufsteigendem Gasstrom (nicht dargestellt), welcher über einen Schaufelkranz 28 am Umfang der Mahlschüssel 4 dem Mahlraum 3 zugeführt wird, einem Sichter 7, welcher oberhalb des Mahlraums 3 angeordnet und in diesem Ausführungsbeispiel in die Wälzmühle 2 integriert ist, zur Klassierung zugeführt.The comminuted regrind (not shown) is in an ascending gas flow (not shown), which is supplied via a blade ring 28 on the circumference of the grinding bowl 4 the grinding chamber 3, a classifier 7, which arranged above the grinding chamber 3 and in this embodiment in the roller mill 2 is integrated, fed to the classification.

Der Sichter 7 ist mit einem um die Längsachse 20 rotierenden Rotor 30, welcher Sichtleisten 31 aufweist, versehen. Konzentrisch um den Sichterrotor 30 ist unter Ausbildung eines Sichtraumes 32 ein Leitflügelkranz 33 angeordnet.The classifier 7 is provided with a rotor 30 which rotates about the longitudinal axis 20 and has sight strips 31. Concentrically around the sifter rotor 30, a Leitflügelkranz 33 is arranged to form a viewing space 32.

Genügend zerkleinertes Feingut (nicht dargestellt) verlässt den Sichter 7 im Gasstrom über einen Feingutaustrag (nicht dargestellt), während Grobkorn (nicht dargestellt) vom Sichter 7 abgewiesen wird und in einen Grießekonus 8 unterhalb des Sichters 7 fällt. Der Grießekonus 8 weist bodenseitig eine zentrale Konusöffnung 9 auf, welche eine mittige Zuführung des Grobkorns zur Mahlschüssel 4 beziehungsweise auf einen zentralen Verteilungsbereich 24 der Mahlschüssel 4 und eine gleichmäßige Zuführung zu den Mahlwalzen 6 ermöglicht.Sufficiently crushed fines (not shown) leave the classifier 7 in the gas stream via a fines discharge (not shown), while coarse grain (not shown) is rejected by the classifier 7 and falls into a semolina cone 8 below the classifier 7. The semolina cone 8 has on the bottom side a central cone opening 9, which allows a central supply of the coarse grain to the grinding bowl 4 or to a central distribution region 24 of the grinding bowl 4 and a uniform feed to the grinding rolls 6.

Im vorliegenden Ausführungsbeispiel ist der zentrale Verteilungsbereich 24 kegelstumpfförmig ausgebildet. Eine gleichmäßige Verteilung des Grobkorns und des mit Hilfe des Aufgabesystems zugeführten Aufgabematerials 5 ist gewährleistet, indem das Aufgabematerial 5 und das Grobkorn über den konischen Verteilungsbereich 24 oder Verdrängungskörper gleichmäßig abgeleitet werden und auf der Mahlschüssel 4 unter Fliehkraftwirkung in Richtung Mahlbahn 26 und unter die Mahlwalzen 6 gelangen.In the present embodiment, the central distribution region 24 is frusto-conical. Uniform distribution of the coarse grain and the feed material 5 supplied by means of the feed system is ensured by uniformly discharging the feed material 5 and the coarse grain via the conical distribution region 24 or displacement body and on the grinding bowl 4 under centrifugal force in the direction of the grinding path 26 and below the grinding rolls 6 reach.

Das Aufgabesystem für eine energieeffiziente, zentrale und gleichmäßige Zuführung des Aufgabeguts 5 in den Mahlraum 3 und auf die Mahlbahn 26 der Mahlschüssel 4 weist einen Schneckenaufgeber 10 auf. Der Schneckenaufgeber 10 ist im Wesentlichen horizontal angeordnet und in die Wälzmühle 2 im Bereich des Grießekonus 8 integriert.The feeding system for an energy-efficient, central and uniform feeding of the feed 5 into the grinding chamber 3 and on the grinding path 26 of the grinding bowl 4 has a screw feeder 10. The screw feeder 10 is arranged substantially horizontally and integrated into the roller mill 2 in the region of the semolina cone 8.

Der Schneckenaufgeber 10 ist außerhalb der Wälzmühle 2 mit einem Zuführungskanal 19 verbunden, welcher nahezu senkrecht außenseitig an der Wälzmühle 2 beziehungsweise am Sichter 7 angeordnet ist. In einem Verbindungsbereich 23 zwischen dem Schneckenaufgeber 10 und dem Zuführungskanal 19 kann ein Kompensator (nicht dargestellt) zur Schwingungsisolation des Aufgabesystems, insbesondere des Schneckenaufgebers 10, von der Wälzmühle 2 angeordnet sein.The screw feeder 10 is connected outside the roller mill 2 with a supply channel 19, which is arranged almost perpendicularly on the outside of the roller mill 2 or on the separator 7. In a connection region 23 between the screw feeder 10 and the feed channel 19, a compensator (not shown) for vibration isolation of the feed system, in particular of the screw feeder 10, may be arranged by the roller mill 2.

Der Schneckenaufgeber 10 weist eine Schneckenwelle 12 auf, welche durch die Wälzmühle 2 beziehungsweise den Grießekonus 8 geführt ist und dabei die Längsachse 20 der Wälzmühle schneidet. Im Bereich der Längsachse 20 endet ein Fördertrog 11 und eine Abdeckung 21 des Schneckenaufgebers 10, welcher auch als Rohrschneckenförderer ausgebildet sein kann.The screw feeder 10 has a worm shaft 12, which is guided by the roller mill 2 and the semolina cone 8 and thereby cuts the longitudinal axis 20 of the roller mill. In the region of the longitudinal axis 20 ends a conveyor trough 11 and a cover 21 of the screw feeder 10, which may also be designed as a tube worm conveyor.

Aus der Figur geht hervor, dass der Schneckenaufgeber 10 mit einem mühlenaußenseitigen Endbereich 25 außerhalb der Wälzmühle 2 angeordnet ist, während ein mahlraumseitiger Endbereich 27 im Zentrum der Wälzmühle 2 beziehungsweise des Mahlraumes 3 angeordnet ist.From the figure shows that the screw feeder 10 is arranged with a mill outside end portion 25 outside the roller mill 2, while a milling space side end portion 27 in the center of the roller mill 2 and the grinding chamber 3 is arranged.

Die Aufgabe des Aufgabematerials 5 aus dem senkrechten Zuführungskanal 19 in den Schneckenaufgeber 10 erfolgt über eine Aufnahmeöffnung 15 im mühlenaußenseitigen Endbereich 25, indem das Aufgabematerial 5 in den Fördertrog 11 fällt und mit Hilfe des Schneckengetriebes 29 von dem mühlenaußenseitigen Endbereich 25 bis zum mahlraumseitigen Endbereich 27 und einer hier ausgebildeten Auswurföffnung 17 zwangsgefördert wird. Die Zwangsförderung verhindert Anbackungen und Verstopfungen.The task of the feed material 5 from the vertical feed channel 19 in the screw feeder 10 takes place via a receiving opening 15 in the outer wall end portion 25 by the feed material 5 falls into the conveyor trough 11 and with the help of the worm gear 29 from the mills outer side end portion 25 to the milling space end portion 27 and a discharge opening 17 formed here is forcibly conveyed. Forced delivery prevents caking and blockages.

Die Auswurföffnung 17 im Fördertrog 11 befindet sind oberhalb der Konusöffnung 9 und ist koaxial zur Längsachse 20 der Wälzmühle ausgebildet, so dass das Aufgabematerial 5 zusammen mit dem Grobkorn über die Konusöffnung 9 auf den zentralen Verteilungsbereich 24 der Mahlschüssel 4 und von hier gleichmäßig auf die Mahlbahn 26 zur Zerkleinerung gelangt.The ejection opening 17 are located in the conveyor trough 11 are above the cone opening 9 and is coaxial with the longitudinal axis 20 of the roller mill, so that the feed material 5 together with the coarse grain on the cone opening 9 on the central distribution area 24 of the grinding bowl 4 and from here evenly on the grinding path 26 comes to shredding.

Die Schneckenwelle 12 ist außerhalb des Fördertrogs 11 und der Abdeckung 21 beziehungsweise außerhalb des Rohrschneckenförderers mit einem Schutzrohr 16 versehen, welches bis nahe an eine Lagerung 14 für die Schneckenwelle 12 reicht. Abdichtungen (nicht dargestellt) der Schneckenwelle 12 gegenüber dem feststehenden Mühlengehäuse 22 können vorgesehen sein.The worm shaft 12 is provided outside the conveyor trough 11 and the cover 21 or outside of the tube worm conveyor with a protective tube 16 which extends to close to a bearing 14 for the worm shaft 12. Seals (not shown) of the worm shaft 12 opposite the fixed mill housing 22 may be provided.

Eine Antriebseinrichtung 13 außerhalb der Wälzmühle 2 ist mit dem der Lagerung 14 gegenüberliegenden Endbereich der Schneckenwelle 12 verbunden und kann wie die Lagerung 14 auf einer Unterstützungskonstruktion 18 der Wälzmühle 2 angeordnet sein.A drive device 13 outside the roller mill 2 is connected to the opposite end of the bearing 14 of the worm shaft 12 and may be arranged as the bearing 14 on a support structure 18 of the roller mill 2.

Claims (9)

  1. Roller mill
    having a grinding chamber (3) and a rotating grinding pan (4), on which resiliently impacted grinding rollers (6) roll and grind feed material (5) which is fed to the grinding pan (4) with the aid of a feed system,
    having a classifier (7) above the grinding chamber (3), to which the ground grinding material is fed in an ascending gas flow and
    having a grit cone (8) for coarse grain rejected in the classifier (7) and dropping down which passes via a conical opening (9) back into the grinding chamber (3) and to the grinding pan (4) for renewed grinding, wherein the feed system comprises a screw feeder (10) which is integrated in the region of the grit cone (8) into the roller mill (2) and is formed in such a way that the feed material (5) is conveyed into the roller mill (2) and centrally fed to the grinding pan (4),
    characterised in that
    the screw feeder (10) comprises a screw shaft (12) which is guided through the grit cone (8) and cuts the longitudinal axis (20) of the roller mill (2) and is arranged on both sides respectively outside of the roller mill,
    the screw shaft (12) is connected at one end with a drive means (13) and is positioned at the other end in a bearing (14) and the drive means (13) and the bearing (14) are arranged outside of the roller mill (2),
    the screw feeder (10) comprises a conveyor tray (11) and a cover (21) which extend from a mill outer side end region (25) to a grinding chamber side end region (27), a receiving opening (15) is formed in the cover (21) and an ejection opening (17) in the pipe tray (11) and virtually coaxially with the longitudinal axis (20) of the roller mill and above the cone opening (9).
  2. Roller mill according to claim 1,
    characterised in that
    the screw feeder (10) is formed as a tubular screw conveyer and is arranged virtually horizontally and above the cone opening (9) of the grit cone (8).
  3. Roller mill according to claim 1 or 2,
    characterised in that
    the screw feeder (10) comprises a mill outer side end region (25) and a grinding chamber side end region (27) and a receiving opening (15) for the feed material (5) is formed in the mill outer side end region and an ejection opening (17) for the central feed of the feed material (5) onto the grinding pan (4) is formed in the grinding chamber side end region (27).
  4. Roller mill according to one of the preceding claims,
    characterised in that
    the feed system comprises a feed channel (19) for the feed material (5) which is arranged virtually perpendicular on the side and outside of the roller mill (2) and is connected to the screw feeder (10) via the receiving opening (15) in the mill outer side end region (25).
  5. Roller mill according to one of the preceding claims,
    characterised in that
    a means for vibration insulation of the feed system from the roller mill (2) is provided.
  6. Roller mill according to claim 5,
    characterised in that
    the means for vibration insulation comprises a compensator which is integrated into the feed channel (19).
  7. Roller mill according to one of the preceding claims,
    characterised in that
    a seal is provided between the rotating screw shaft (12) and the mill housing (22) which is formed as a mechanical seal or takes place by means of barrier gas.
  8. Roller mill according to one of the preceding claims,
    characterised in that
    the drive means (13) of the feed system is designed with a constant speed or with a speed which can be regulated by means of a frequency inverter.
  9. Roller mill according to one of the preceding claims,
    characterised in that
    the grinding pan (4) comprises a central distribution region (24) for distributing the feed material (5) and the returned coarse grain under the grinding rollers (6) which is formed as a raised region, for example in the form of a truncated cone or as a dispersion plate, and the ejection opening (17) of the screw feeder (10) and the cone opening (9) of the grit cone (8) are arranged above the central distribution region (24) of the grinding pan (4).
EP12713873.3A 2011-03-21 2012-03-15 Roller mill Not-in-force EP2632598B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12713873T PL2632598T3 (en) 2011-03-21 2012-03-15 Roller mill

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011014592A DE102011014592A1 (en) 2011-03-21 2011-03-21 roller mill
PCT/EP2012/001162 WO2012126590A2 (en) 2011-03-21 2012-03-15 Roller mill

Publications (3)

Publication Number Publication Date
EP2632598A2 EP2632598A2 (en) 2013-09-04
EP2632598B1 EP2632598B1 (en) 2014-05-14
EP2632598B2 true EP2632598B2 (en) 2018-01-10

Family

ID=45953057

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12713873.3A Not-in-force EP2632598B2 (en) 2011-03-21 2012-03-15 Roller mill

Country Status (15)

Country Link
US (1) US8925844B2 (en)
EP (1) EP2632598B2 (en)
JP (1) JP5756559B2 (en)
KR (1) KR20140009240A (en)
CN (1) CN103764290A (en)
AU (1) AU2012231043A1 (en)
BR (1) BR112013016311A2 (en)
CA (1) CA2817277A1 (en)
CO (1) CO6771443A2 (en)
DE (1) DE102011014592A1 (en)
DK (1) DK2632598T3 (en)
ES (1) ES2474146T3 (en)
PE (1) PE20141238A1 (en)
PL (1) PL2632598T3 (en)
WO (1) WO2012126590A2 (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104001586A (en) * 2014-05-15 2014-08-27 江苏天鹏机电制造有限公司 High-efficient vertical mill millstone auxiliary member
US10016762B2 (en) * 2015-06-16 2018-07-10 Arvos Raymond Bartlett Snow Llc Vertical bowl mill for producing coarse ground particles
JP2017047378A (en) * 2015-09-02 2017-03-09 ホソカワミクロン株式会社 Powder treatment apparatus and method for manufacturing toner
CN106040367A (en) * 2016-08-03 2016-10-26 无锡得戟重工有限公司 Grinding device for cement production
CN106179615A (en) * 2016-08-23 2016-12-07 南京凯盛国际工程有限公司 A kind of vertical mill feeding device
EP3292912B1 (en) * 2016-09-09 2019-12-25 Loesche GmbH Method for operating a multicyclone for separating fine and micro grain and multicyclone
DE102016121926B4 (en) 2016-11-15 2019-12-24 Neuman & Esser Process Technology Gmbh Mill
JP6782623B2 (en) * 2016-12-14 2020-11-11 花王株式会社 Toner manufacturing method
DE102017115856A1 (en) * 2017-07-14 2019-01-17 Maschinenfabrik Köppern Gmbh & Co. Kg Roller press and method for determining the filling level
JP6982467B2 (en) * 2017-10-27 2021-12-17 ホソカワミクロン株式会社 Powder processing equipment
CN107744858A (en) * 2017-11-16 2018-03-02 温岭市忠盛金属材料有限公司 Zinc powder drying and crushing device in alkali leaching electrolytic metal zinc powder
CN112973878A (en) * 2019-12-02 2021-06-18 宁海县洪基新型建材科技有限公司 Vertical slag mill and grinding process thereof
CN112517176A (en) * 2019-12-19 2021-03-19 彭茄琪 Biomass particle fuel smashing device with material pressing function
EP4142948B1 (en) * 2020-04-29 2024-05-22 Fidetechnology Lda Apparatus and method for grinding particulate material
EP3903940A1 (en) * 2020-04-29 2021-11-03 Mads Jespersen Cement production apparatus and method for grinding particulate material
CN113070147A (en) * 2021-05-06 2021-07-06 义乌市创继农业科技有限公司 Pig feed production raw material crushing machine and crushing processing method
CN113245044A (en) * 2021-06-17 2021-08-13 安徽索维机电设备制造有限公司 Full-automatic vacuum basket type grinder
CN114405629B (en) * 2022-01-25 2023-06-06 张家港东南机械有限公司 Superfine powder mill
CN115445739B (en) * 2022-07-05 2024-07-26 江西庞泰环保股份有限公司 Tar residue liquefaction grinding device and tar residue treatment system using same

Family Cites Families (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2100734A (en) * 1936-02-05 1937-11-30 Comb Eng Co Inc Mill and classifier
US2112359A (en) * 1936-06-29 1938-03-29 Comb Eng Co Inc Rotary bowl mill
US3038671A (en) * 1960-02-02 1962-06-12 Marchfelder Richard Apparatus for treating fibrous materials
DE1938772C3 (en) * 1969-07-30 1980-06-12 Krupp Polysius Ag, 4720 Beckum Roller mill
DE3100341A1 (en) 1981-01-08 1982-07-22 Loesche GmbH, 4000 Düsseldorf ROLL MILL, ESPECIALLY FOR COAL GRINDING
DE3134601C2 (en) 1981-09-01 1985-10-31 Loesche GmbH, 4000 Düsseldorf Roller bowl mill
JPS58178346U (en) * 1982-05-21 1983-11-29 宇部興産株式会社 Laura Mill's airtight structure
US4597537A (en) 1982-09-14 1986-07-01 Onoda Cement Company, Ltd. Vertical mill
JPS59171750U (en) * 1983-05-02 1984-11-16 株式会社神戸製鋼所 Rolla mill sealing device
US4606506A (en) 1984-05-04 1986-08-19 Kawasaki Jukogyo Kabushiki Kaisha Vertical type roller mill
DE3418197A1 (en) * 1984-05-16 1985-11-21 Krupp Polysius Ag, 4720 Beckum GRINDING METHOD AND MILLING PLANT
DE3718781A1 (en) * 1987-06-04 1988-12-15 Krupp Polysius Ag ROLL MILL
JPH055953Y2 (en) * 1987-08-04 1993-02-16
CN2056608U (en) * 1989-05-02 1990-05-02 付祥正 Verticle pulverizer
DE4124416A1 (en) * 1991-07-23 1993-01-28 Krupp Polysius Ag DEVICE AND METHOD FOR CRUSHING GROUND DIFFERENT GRAIN
JP2556414B2 (en) * 1992-03-31 1996-11-20 川崎重工業株式会社 Vertical roller mill
DE4323587C2 (en) * 1993-07-14 1996-07-18 Loesche Gmbh Method and device for crushing material of different grain sizes
GB9317849D0 (en) * 1993-08-27 1993-10-13 Bpb Industries Plc Improvements in calcination
DE19528338C1 (en) 1995-08-02 1996-10-24 Evt Energie & Verfahrenstech Dish shaped mill, with rotating milling dish
JP3624307B2 (en) * 1998-12-24 2005-03-02 太平洋エンジニアリング株式会社 Crushing classification method and apparatus
JP2000312832A (en) * 1999-04-30 2000-11-14 Ishikawajima Harima Heavy Ind Co Ltd Vertical mill
DE19961837A1 (en) 1999-12-21 2001-06-28 Loesche Gmbh Sifter mill, and especially rolling sifter mill, has guide vanes with flow-optimized form, and has vaned rotor in dynamic sieve section cylindrically constructed and has cylindrical rotor section with perpendicularly disposed vanes
US6820829B1 (en) * 2000-02-25 2004-11-23 Exportech Company, Inc. Method and apparatus for separating material
DE10224009B4 (en) 2002-05-29 2004-07-22 Loesche Gmbh Process for comminuting material, in particular ores, and roller mill for carrying out the process
US7226010B2 (en) * 2004-02-27 2007-06-05 Abb Inc. Method and apparatus for solid fuel pulverizing operation and maintenance optimization
CN2698446Y (en) * 2004-03-18 2005-05-11 鲁扬 Flour mill
JP2010125356A (en) * 2008-11-25 2010-06-10 Ihi Corp Vertical mill
JP5531411B2 (en) * 2009-01-09 2014-06-25 宇部興産機械株式会社 Vertical crusher

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
Auszüge aus der Betriebsanleitung BA200700125 für Mahlanlage mit Walzenschüsselmühle MPS 2800 B der Gebr. Pfeiffer AG Kaiserslautern aus dem Jahr 2007 †
BEITZ W. ET AL: "Taschenbuch für den Maschinenbau", vol. 19. AUFL, 1997, SPRINGER VERLAG, BERLIN, pages: U57 - U58 †
Betriebsanleitung einer Rohrförderschnecke der Firma Di Matteo Förderanlagen GmbH & Co. KG aus dem Jahr 2007 †
KOTOWSKI C. ET AL: "Gleichzeitige Herstellung von Kalksteinmehl und Körnungen minus 1,2 mm mit einer MPS-Walzenschüsselmühle", ZKG INTERNATIONAL, vol. 56, no. 6, 2003, pages 73 - 75 †
SCHNEIDER O.: "Die Walzenschüsselmühle MPS für Vermahlung von Steinkohle", AUFBEREITUNGS-TECHNIK, no. 9, 1971, pages 537 - 549 †
Sonderdruck in Mitteilung Nr. 40, Deutsche Babcock Werke Aktiengesellschaft, 1983, S. 3-15 †

Also Published As

Publication number Publication date
KR20140009240A (en) 2014-01-22
CA2817277A1 (en) 2012-09-27
BR112013016311A2 (en) 2018-07-10
CO6771443A2 (en) 2013-10-15
DE102011014592A1 (en) 2012-09-27
WO2012126590A2 (en) 2012-09-27
JP2014508642A (en) 2014-04-10
DK2632598T3 (en) 2014-07-21
US8925844B2 (en) 2015-01-06
EP2632598A2 (en) 2013-09-04
ES2474146T3 (en) 2014-07-08
US20130313348A1 (en) 2013-11-28
CN103764290A (en) 2014-04-30
PL2632598T3 (en) 2014-08-29
EP2632598B1 (en) 2014-05-14
JP5756559B2 (en) 2015-07-29
PE20141238A1 (en) 2014-10-15
AU2012231043A1 (en) 2013-06-13
WO2012126590A3 (en) 2012-12-06

Similar Documents

Publication Publication Date Title
EP2632598B2 (en) Roller mill
EP2637790B1 (en) Process of grinding and grinding mill
DE102007005250B3 (en) Dry grinding method for continuous dry grinding in an abrasive tower grinder uses a closed vertical grinding container fitted with a worm feeder driven so as to rotate and feed grinding substances upwards
EP1919624B1 (en) Drying mill and method of drying ground material
EP0325770B1 (en) Grinding method and arrangement
EP1948360B1 (en) Roller mill
DE4323587C2 (en) Method and device for crushing material of different grain sizes
EP2694215B1 (en) Method and device for grinding moist material
EP3209423B1 (en) Grinding plant for comminution of material and method of comminution of material
DE10141414A1 (en) Roller mill, in particular airflow roller mill, and method for grinding materials with magnetizable, in particular iron-containing components, for example slags
EP2804696B1 (en) Method and vertical mill for grinding a product to be milled
DE8425837U1 (en) Roller mill
EP3274112B1 (en) Molding sand cooler
DE4316350C1 (en) Feed apparatus for gas-flow comminuting machines
EP3541523B1 (en) Mill
DE3222890A1 (en) POWDER MILL DEVICE
DE7234679U (en) WHEEL GRINDER FOR CRUSHING GROUND PRODUCTS THROUGH HARD-GRINDABLE PARTICLES
DE102009015037B4 (en) roller mill
EP3849714B1 (en) Sifting wheel with flat sail elements and method of sifting with such a sifting wheel
DE102014116395A1 (en) Silosystem with conveyor
DD225634A1 (en) TASKING DEVICE FOR ROLLING MILLS
DD139396A1 (en) SEPARATION DEVICE FOR MILLS
DE2620921A1 (en) Classification unit for piece or bulk goods - is operated through a sorting net fitted between central housing and surrounding rotor

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20130205

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20131125

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

DAX Request for extension of the european patent (deleted)
AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 667835

Country of ref document: AT

Kind code of ref document: T

Effective date: 20140615

REG Reference to a national code

Ref country code: NL

Ref legal event code: T3

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502012000753

Country of ref document: DE

Effective date: 20140626

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2474146

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20140708

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

Effective date: 20140717

REG Reference to a national code

Ref country code: PL

Ref legal event code: T3

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140815

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140814

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140514

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140914

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140514

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140514

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140514

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140514

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140514

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140514

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140915

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140514

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140514

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140514

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140514

REG Reference to a national code

Ref country code: DE

Ref legal event code: R026

Ref document number: 502012000753

Country of ref document: DE

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: GEBR. PFEIFFER SE

Effective date: 20150207

Opponent name: MITSUBISHI HITACHI POWER SYSTEMS EUROPE GMBH

Effective date: 20150212

PLAX Notice of opposition and request to file observation + time limit sent

Free format text: ORIGINAL CODE: EPIDOSNOBS2

REG Reference to a national code

Ref country code: DE

Ref legal event code: R026

Ref document number: 502012000753

Country of ref document: DE

Effective date: 20150207

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20150331

Year of fee payment: 4

Ref country code: NL

Payment date: 20150226

Year of fee payment: 4

Ref country code: DK

Payment date: 20150213

Year of fee payment: 4

Ref country code: ES

Payment date: 20150302

Year of fee payment: 4

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: PL

Payment date: 20150302

Year of fee payment: 4

Ref country code: TR

Payment date: 20150219

Year of fee payment: 4

PLAF Information modified related to communication of a notice of opposition and request to file observations + time limit

Free format text: ORIGINAL CODE: EPIDOSCOBS2

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140514

PLBB Reply of patent proprietor to notice(s) of opposition received

Free format text: ORIGINAL CODE: EPIDOSNOBS3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150315

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140514

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20151130

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150315

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150331

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150331

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

Effective date: 20160331

REG Reference to a national code

Ref country code: NL

Ref legal event code: MM

Effective date: 20160401

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20160315

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140514

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160401

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160315

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160315

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20170427

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20120315

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160331

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140514

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140514

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160315

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160316

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

27A Patent maintained in amended form

Effective date: 20180110

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: DE

Ref legal event code: R102

Ref document number: 502012000753

Country of ref document: DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 502012000753

Country of ref document: DE

Representative=s name: WUNDERLICH & HEIM PATENTANWAELTE PARTNERSCHAFT, DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 667835

Country of ref document: AT

Kind code of ref document: T

Effective date: 20170315

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140514

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170315

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140514

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140514

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20220329

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160315

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502012000753

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20231003