WO2012049094A1 - Broyeur à paliers élastiques - Google Patents

Broyeur à paliers élastiques Download PDF

Info

Publication number
WO2012049094A1
WO2012049094A1 PCT/EP2011/067581 EP2011067581W WO2012049094A1 WO 2012049094 A1 WO2012049094 A1 WO 2012049094A1 EP 2011067581 W EP2011067581 W EP 2011067581W WO 2012049094 A1 WO2012049094 A1 WO 2012049094A1
Authority
WO
WIPO (PCT)
Prior art keywords
roller
rollers
cavities
roller mill
crushing
Prior art date
Application number
PCT/EP2011/067581
Other languages
English (en)
Inventor
Mads Jespersen
Original Assignee
Flsmidth A/S
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
Application filed by Flsmidth A/S filed Critical Flsmidth A/S
Publication of WO2012049094A1 publication Critical patent/WO2012049094A1/fr

Links

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
    • B02C15/004—Shape or construction of rollers or balls
    • 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
    • B02C15/14—Edge runners, e.g. Chile mills

Definitions

  • the present invention relates to a roller mill for crushing particulate material, such as cement raw materials, crude ore or similar materials, comprising a crushing table and a number of rollers rotating about separate roller shafts which via a hinged connection are connected to a rotatable vertical shaft centrally positioned relative to the crushing table where the rollers are configured for interactive operation with the crushing table.
  • a roller mill of the aforementioned kind is known, for example from UK patent no. 601 ,299. This known mill is designed so that the set of rollers rotate in one direction and the crushing table rotates in the opposite direction so as to increase the capacity of the mill.
  • the set of rollers is capable of rotating at 20 revolutions per minute.
  • roller mills may further or alternatively be provided with an external force mechanism, whether mechanical or hydraulic, for optimizing the crushing pressure.
  • an external force mechanism whether mechanical or hydraulic
  • roller mill of the kind mentioned in the introduction and being characterized in that at least one of the rollers has one or more cavities which make up at least ten per cent of the volume of the roller and in that the roller comprises means for introducing and keeping a liquid in the one or more cavities.
  • the crushing force can be optimized without changing the rotational speed of the vertical shaft or providing the roller mill with an external force mechanism.
  • it will be possible to maintain a desired rotational speed of the vertical shaft and the rollers, e.g. in order to achieve a low level of vibration in the roller mill, and by changing the mass of the rollers by introducing a liquid into the rollers to optimize the crushing pressure.
  • the hinged connection has a centre of rotation which allows a free circular movement of the roller in upward and downward direction in a plane comprising the centreline of the roller shaft. In this way the contribution to the crushing force from the gyroscopic effect will be most effective.
  • the centre of rotation of the hinged connection may in a horizontal plane be in line with the centre of mass of the roller, the roller shaft and the hinge part connected thereto, or in a vertical plane differ from the centre of mass of the roller, roller shaft and the hinge part connected thereto.
  • At least a part of the liquid introduced into the cavities may originate from a cooling system which e.g. controls the roller temperature in the roller mill or from a lubrication system which e.g. lubricates the roller bearings in the roller mill.
  • the liquid introduced into the cavities in the rollers may cool the rollers sufficiently, thereby dispensing with the need for a dedicated cooling system for the rollers.
  • Another advantage by introducing the liquid from a cooling or lubrication system integrated in the roller mill is that it will be possible to carry out the introduction of liquid while the roller mill is in operation.
  • Each roller may have a single large cavity or have several smaller cavities. From the outside of the roller the only connection to the one or more cavities is through the means for introducing and keeping the liquid in the one or more cavities.
  • the one or more cavities inside the roller make up between thirty and ninety per cent, preferably between fifty and eighty per cent, of the volume of the roller.
  • the geometry of the cavities may have any conceivable shapes, however, it is preferred that the cavities are shaped and located inside the roller in a rotational-symmetrical way.
  • the means for introducing and keeping the liquid in the one or more cavities may in principle be constituted by any suitable means as long as they are capable of filling each cavity with the liquid and to shut off access to the cavity after the introduction of the liquid.
  • the means may comprise a one-way valve through which the liquid is introduced. Such means may be connected to the cooling or lubrication system in the roller mill.
  • the means may comprise a valve with only two positions, an open position giving access to an inlet to the cavity from the outside of the roller and a closed position where the inlet to the cavity is sealed. The liquid is introduced into the cavity in the open position and when the mill is in operation the valve is in the closed position.
  • the means may comprise a screwed connection where a threaded hole, which is made from the outside of the roller, is in open connection with an inlet to the cavity and where the mounting of a screw in the threaded hole will seal the inlet to the cavity.
  • the means for introducing and keeping the liquid in the one or more cavities may also be utilised for emptying the one or more cavities, but also other means may be used for this purpose, e.g. a plug connected to the one or more cavities or other suitable arrangements.
  • at least one of the rollers comprises means for at least partly emptying the one or more cavities during operation. This will be advantageous as it then will be possible to fill up the cavities completely with liquid and then slowly reduce the amount of liquid during operation.
  • the means for at least partly emptying the one or more cavities during operation may comprise a solenoid valve which is capable of being controlled during operation of the roller mill.
  • the means for at least partly emptying the one or more cavities may be controlled by the cooling or lubrication system in the mill. In this way both introduction of liquid in the cavities and emptying of the cavities can be controlled during operation by the cooling or lubrication system in the mill.
  • the centre of rotation of the hinged connection in a vertical plane is situated under the horizontal plane which comprises the centre of mass of the roller, roller shaft and the hinge part connected thereto. In this way the centrifugal force which acts upon the roller, the roller shaft and the hinged connection during the operation of the mill, will, because of the special design as defined above, generate a torque around the hinge and hence a downwardly directed force towards the crushing table.
  • the set of rollers and the crushing table are turned in opposite directions.
  • the speed of rotation of the rollers must exceed that applied in bigger mills in order to achieve a desired pressure contribution from the gyroscopic effect which during the operation of the mill produces a force directed downward against the crushing table.
  • the crushing table must have a certain speed of rotation to enable the centrifugal force to transport the material towards its peripheral edge. Therefore the speed of rolling in small mills may become so high as to give rise to operational problems in terms of vibrations and similar occurrences. In small mills, it is therefore preferred that the rollers and the crushing table are turned in the same direction.
  • the fact that the ground material is brought into contact with the gases is mainly ascribable to the gas flows in the crushing area arising in response to the movement of the entire roller arrangement, where the roller arrangement comprises the rollers, roller shafts and the vertical roller shaft, and the fact that the ground material deposited on or present in immediate proximity of the rollers will be thrust away from the rollers by the rotation of the latter.
  • the rotational speed of the roller arrangement must as a minimum be sufficient to bring the ground material into contact with the introduced gases so that the ground material is suspended in the gases.
  • a roller mill 1 which comprises a horizontal crushing table 2 and a set of rollers 3 operating interactively therewith, with the set of rollers 3 being connected to and turning about a vertical shaft 6.
  • the rollers 3 turn about separate horizontal roller shafts 4 which are connected to the vertical shaft 6 via a hinged connection 5 which allows the roller 3, when turning about this connection 5, to move freely up and down in a plane which comprises the centreline 10 of the roller shaft 4.
  • the rollers 3 have an internal cavity 7 into which a liquid is introduced in order to change the dead load of the rollers 3. By changing the dead load of the rollers 3 the force contribution from the mass of the rollers 3 and from the gyroscopic effect will change.
  • the cavities 7 in the rollers 3 make up about sixty per cent of the volume on the inside of each roller 3.
  • the maximum volume of the cavities 7 in the rollers 3 is determined by more parameters, e.g. by the shape of the roller 3 and the necessary thickness of the wear layer of the roller 3.
  • the cavities 7 are shaped and located inside the roller 3 in a rotational-symmetrical way in order to minimize vibrations.
  • An on/off valve 8 is mounted in the roller 3 in order to allow for the introduction of the liquid into the cavity 7.
  • the valve 8 gives access to the cavity 7 from the outside of the roller 3.
  • the valve 8 seals the cavity 7 in order to keep the liquid in the cavity 7.
  • the liquid is introduced into the cavity 7 in the open position and when the roller mill 1 is in operation the valve 8 is in the closed position.
  • the valve 8 may be an externally controlled solenoid valve capable of partly emptying the cavity 7 during operation. In this way it is possible to fill up the cavity 7 completely with liquid and then slowly reduce the amount of liquid during operation. In this way the dead load of the rollers 3 can be reduced continuously thereby reducing the crushing force until the desired crushing force is achieved after which the reduction of liquid is stopped.
  • the centre 9 of rotation of the hinged connection 5, viewed in a vertical plane, is situated under the horizontal plane which comprises the centre 1 1 of mass of the roller 3, the roller shaft 4 and the hinge part 12 connected thereto.
  • the rollers 3 and the crushing table 2 may be turned in opposite directions, in the same direction or the crushing table 2 may be stationary.
  • the preferred operation of the crushing table 2 depends on a number of parameters, e.g. the rotational speed of the vertical shaft 6, the size of the roller mill 1 and the type of material to be crushed.

Landscapes

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

Abstract

L'invention porte sur un broyeur à paliers élastiques (1) pour broyer un matériau en particules, tel que des matériaux amorphes de ciment, des matériaux de minerai brut, ou similaires, lequel broyeur comprend une table de broyage (2) et un certain nombre de paliers élastiques (3) tournant autour d'arbres de palier élastique séparés (4), qui, par l'intermédiaire d'une liaison articulée (5), sont reliés à un arbre vertical rotatif (6) positionné de façon centrale par rapport à la table de broyage (2), les paliers élastiques (3) étant configurés pour un fonctionnement interactif avec la table de broyage (2). Le broyeur à paliers élastiques (1) est caractérisé en ce qu'au moins l'un des paliers élastiques (3) a une ou plusieurs cavités (7) qui constituent au moins dix pour cent du volume du palier élastique (3), et en ce que le palier élastique comprend des moyens (8) pour introduire et maintenir un liquide dans la ou les cavités (7).
PCT/EP2011/067581 2010-10-11 2011-10-07 Broyeur à paliers élastiques WO2012049094A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA201000920 2010-10-11
DKPA201000920 2010-10-11

Publications (1)

Publication Number Publication Date
WO2012049094A1 true WO2012049094A1 (fr) 2012-04-19

Family

ID=44785849

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/067581 WO2012049094A1 (fr) 2010-10-11 2011-10-07 Broyeur à paliers élastiques

Country Status (1)

Country Link
WO (1) WO2012049094A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110694739A (zh) * 2019-11-28 2020-01-17 付耀军 一种陶瓷生产原料研磨处理设备
CN110882761A (zh) * 2019-12-12 2020-03-17 江苏吉能达环境能源科技有限公司 一种水泥终粉磨用立式磨辊结构

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB601299A (en) 1945-11-29 1948-05-03 Clayton Goodfellow And Company Improvements relating to grinding mills
CA1038358A (fr) * 1974-08-12 1978-09-12 Willi Lehr Protecteur sur pulverisateur a rouleaux
SU1404108A1 (ru) * 1986-12-02 1988-06-23 Всесоюзный Научно-Исследовательский Институт Цементного Машиностроения Валок тарельчато-валковой мельницы
WO2009000577A1 (fr) * 2007-06-27 2008-12-31 Flsmidth A/S Broyeur à cylindres
WO2010061304A1 (fr) * 2008-11-26 2010-06-03 Flsmidth A/S Broyeur à meules

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB601299A (en) 1945-11-29 1948-05-03 Clayton Goodfellow And Company Improvements relating to grinding mills
CA1038358A (fr) * 1974-08-12 1978-09-12 Willi Lehr Protecteur sur pulverisateur a rouleaux
SU1404108A1 (ru) * 1986-12-02 1988-06-23 Всесоюзный Научно-Исследовательский Институт Цементного Машиностроения Валок тарельчато-валковой мельницы
WO2009000577A1 (fr) * 2007-06-27 2008-12-31 Flsmidth A/S Broyeur à cylindres
WO2010061304A1 (fr) * 2008-11-26 2010-06-03 Flsmidth A/S Broyeur à meules

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110694739A (zh) * 2019-11-28 2020-01-17 付耀军 一种陶瓷生产原料研磨处理设备
CN110694739B (zh) * 2019-11-28 2021-04-23 林驰杰 一种陶瓷生产原料研磨处理设备
CN110882761A (zh) * 2019-12-12 2020-03-17 江苏吉能达环境能源科技有限公司 一种水泥终粉磨用立式磨辊结构
CN110882761B (zh) * 2019-12-12 2021-02-26 江苏吉能达环境能源科技有限公司 一种水泥终粉磨用立式磨辊结构

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