EP2785461B1 - Gutbettwalzenmühle - Google Patents

Gutbettwalzenmühle Download PDF

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Publication number
EP2785461B1
EP2785461B1 EP12816691.5A EP12816691A EP2785461B1 EP 2785461 B1 EP2785461 B1 EP 2785461B1 EP 12816691 A EP12816691 A EP 12816691A EP 2785461 B1 EP2785461 B1 EP 2785461B1
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EP
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Prior art keywords
cylinder
roller
grinding
smoothing roller
axis
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EP12816691.5A
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English (en)
French (fr)
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EP2785461A1 (de
Inventor
Alain Cordonnier
Sébastien DEVROE
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Fives FCB SA
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Fives FCB SA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/06—Mills with rollers forced against the interior of a rotary ring, e.g. under spring action
    • 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

Definitions

  • the invention relates to a compression mill bed materials, usually called horizontal roller mill, and a grinding process using such a mill.
  • Such a mill has a particular application for the grinding of mineral materials, particularly in the dry process, without limitation, for the manufacture of cement clinker.
  • the material advances from one end to the other of the cylinder undergoing successive grinding actions.
  • the particle size of the material is coarser in the part of the mill near the end of the inlet, than in the part of the mill near the end of the outlet.
  • the material fed into the mill has a coarse grain size, with a maximum grain size of up to 120 mm. Due to the operation of the handling systems, the material flow is subject to fluctuations, and the particle size distribution is heterogeneous. This induces variations in the constitution and thickness of the material bed and, thereby, variations in the reaction of the forces exerted by the grinding roll which result in vibrations of the mill.
  • the surface of the bed of material is standardized by the addition of water or other liquid sprayed under pressure by nozzles, which improves the distribution of materials in a layer of uniform thickness on Track.
  • the mill comprises a pre-compression roll, placed upstream of the grinding roll.
  • This pre-compression roll is, like the grinding roll, pressed elastically on the circular track.
  • the purpose of the pre-compression roll is to ensure that the layer of material is wrung out, and that the water that is squeezed out above the layer of material does not reach the grinding roll.
  • the crusher of the document WO97 / 39829 would not be suitable for grinding dry materials.
  • the pre-compression roller of this anteriority which is not maintained at a distance from the track, would not make it possible to standardize the bed of material in the manner of the equalizing roller of the mill according to the invention.
  • the object of the present invention is to provide a horizontal roll mill which overcomes the aforementioned drawbacks, the life of which is increased compared to horizontal roll mills known from the state of the art.
  • Another object of the present invention is to provide a grinding method implemented by a grinder according to the invention.
  • said means for holding the equalizing roller near and at a distance from the raceway of said cylinder, on the one hand, and said means for applying said grinding roller against the rolling track of said cylinder, on the other hand on the other hand, are such that said equalizing roller is able to exert on the bed of materials a pressure which equalizes its surface, lower than the pressure exerted by said grinding roller on said bed of materials.
  • Such a crusher allows the implementation of a compression milling process of material bed in which, during each cylinder revolution, the material passes successively under the equalizing roller and then under the roller grinding, said equalizing roller exerting on the material bed a pressure which equalizes its surface, less than the pressure exerted by said grinding roll on said bed of materials.
  • said means for maintaining the equalizing roller guarantee a minimum distance between the tread and the surface of said equalizing roller, and in which the grinder is fed with a maximum grain size determined between 1 mm and 120 mm and said minimum distance greater than or equal to 0.5 times the determined maximum grain size is determined.
  • the invention also relates to a method of grinding by material bed compression implemented by means of a grinder according to the invention, the holding means comprise said hinge means and wherein said grinder is fed into a material of a maximum grain size determined and the displacement stroke of said equalizing roller is adjusted so as to maintain the surface of the equalizing roller at a distance from the tread of between 0.5 times and 3 times the maximum size of the grains to be ground.
  • the grinding process and the mill according to the invention find a particular application for the grinding of materials in the dry process.
  • Said means for rotating the cylinder 2 may comprise a geared motor whose output axis has a pinion coupled to a ring gear, integral with the outer wall of the cylinder 2.
  • Said means for applying said grinding roll 3 against the tread 20 may comprise slides guiding the ends of the grinding roll 3, as well as jacks or springs able to exert on the ends of the grinding roll 3 the forces which are transmitted to the grinding roller 3.
  • said means for applying said grinding roller 3 against the rolling track 20 of said cylinder 2 are such that the grinding roller 3 exerts on the material bed 5 a mean pressure between 10 MPa and 40 MPa.
  • the supply of materials to the inlet 7 and / or the discharge of the materials to the outlet 8 can be obtained by means of pneumatic handling system.
  • the mill has means (not shown) for controlling the movement of the material along the length of said cylinder 2 so that said material travels only a fraction of the length of the cylinder 2 at each cylinder turn 2 and passes several times. between the cylinder 2 and the grinding roll 3 from said material feed inlet 7 to be milled to said milled material outlet 8.
  • These means may comprise a device intended to ensure the advance of the material, from one end to the other of the cylinder 2 such as in particular described in the document EP-0486371 or EP-0934120 .
  • a device comprises a scraper (or knife) placed at the interior of the cylinder, in the upper descending part, so as to detach the material from the raceway and one or, preferably, several deflector plates arranged under the scraper so as to intercept the material detached by the latter and the deviate towards the exit of the mill.
  • the means 4, 6 are such that, during each cylinder revolution 2, the material passes successively under the equalizing roll 4 and then under the grinding roll 3, said equalizing roll 4 exerting on the material bed 5 a pressure which equalizes its surface, lower than the pressure P exerted by said grinding roll 3 on said bed of materials 5.
  • the pressure of the equalizing roller on the material bed 5 is less than the pressure required to grind the material particles.
  • said holding means 60 of the equalizing roll 4 are such that the equalizing roll 4 exerts on the material bed 5 a pressure of less than 10 MPa, preferably less than 1 MPa.
  • the length of said equalizing roll 4 may be greater than or equal to the length of said grinding roll 3, said equalizing roll 4 being arranged in correspondence of said grinding roll 3 along the length of the roll 2.
  • said holding means 6 of the equalizing roller 4 guarantee a minimum distance between the tread 20 and the surface of said equalizing roller 4, preventing any contact between said equalizing roller 4 and the tread 20.
  • This minimum distance makes it possible to ensure that the granular materials of the bed of materials can be driven laterally, along the axis of the roll, under the action of the said equalizing roller 4, and thus to obtain a bed of materials of constant thickness over the length of the equalizing roller 4.
  • This minimum distance can be determined according to the maximum grain size feeding the mill which can be between 1 mm and 120 mm. According to one embodiment, the minimum distance is greater than or equal to 0.5 times the maximum grain size determined.
  • the equalizing roller 4 is free to rotate, able to be rotated about its axis by friction with the material bed 5.
  • the mill may have drive means for rotating the equalizing roller 4 so that its peripheral speed is equal to the average speed of the material bed 5 on which said equalizing roller 4 is intended to apply.
  • the mill 1 is intended to grind grain with a maximum size of between 1 mm and 120 mm, the diameter of the equalizing roller 4 then being between 100 mm and 660 mm.
  • Said holding means 6 of the equalizing roller 4 may comprise articulation means capable of allowing said equalizing roller 4 to move in a substantially radial direction towards the axis A of said cylinder 2 and elastic means (not shown) forcing said roller equalizer 4 in the opposite direction, towards the raceway (20).
  • said holding means 6 of said equalizing roller 4 ensure the maintenance of said equalizing roller 4 by its two ends, said articulation means of said holding means 6 having two arms 60, each articulated on the one hand, at one end of said arm 60 to said roller equalizer 4, along the axis of said equalizing roller 4 and, on the other hand, at the other end of said arm 60 to a frame of said mill 1, along an axis of rotation B, in particular parallel to the axis A of said cylinder 2 .
  • the displacement stroke of the equalizing roller 4 is limited by said holding means 6.
  • said grinder 1 is fed with a material of a maximum grain size determined and the displacement stroke of said equalizing roller 4 is adjusted so as to maintain the surface of the equalizing roller 4 at a distance from the raceway 20 included between 0.5 and 3 times the maximum size of the kernels to be grinded.
  • the moving stroke of the equalizing roller 4 may be such that the equalizing roller 4 scans the entire range of value.
  • the mill 1 has said means for controlling the movement of the material along the length of said cylinder 2 so that said material travels only a fraction of the length of the cylinder 2 at each cylinder turn 2 and passes several times. between the cylinder 2 and the grinding roll 3 from said material feed inlet 7 to be milled to said milled material outlet 8.
  • the distance "d" between the surface of said equalizing roller 4 and the rolling track 20 may be variable along the length of said cylinder 2, decreasing from said inlet 7 to said outlet 8. and according to the example shown in the figure 4 the axis of the equalizing roller 4 can be inclined with respect to the axis of the cylinder 2.
  • This arrangement makes it possible to take into account the fact that the grain size of the material is coarser in the part of the mill located near the end of the inlet 7 than in the part of the mill located near the end of the exit 8.
  • the distance between the surface of the equalizing roller 4 and the running track 20 at the end of the roller on the input side 7 is greater than the distance between the surface of the equalizing roller 4 and the running track 20 at the end of the roll on the outlet side 8.
  • the ratio between the two distances can be between 1 and 2.
  • the axis of rotation of the equalizing roller 4 is parallel to the axis A of the cylinder 2.
  • the mill and grinding processes according to the invention will find a particular application for the grinding of mineral materials and / or the grinding of materials in the manufacture of cement clinker, particularly in the dry process.

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

Claims (16)

  1. Verfahren zum Zerkleinern durch Kompression eines Materialbettes, das mittels eines Brechers (1) durch Kompression des Materialbettes (5) durchgeführt wird, umfassend:
    - einen Zylinder (2) mit horizontaler Achse (A), dessen Innenwand eine Laufbahn (20) für eine Zerkleinerungswalze (3) aufweist, die im Inneren des Zylinders (2) angeordnet ist,
    - Mittel zum Rotieren des Zylinders um seine Achse (A),
    - die Zerkleinerungswalze (3), deren Achse parallel zu derjenigen Achse (A) des Zylinders (2) verläuft,
    - Mittel zum Anlegen der Zerkleinerungswalze (3) gegen die Laufbahn (20) des Zylinders (2),
    - einen, an einem der Enden des Zylinders (2) angeordneten, Einlass (7) für das Zuführen des zu zerkleinernden Materials, und einen Auslass (R) für das zerkleinerte Material an dem anderen Ende des Zylinders (2),
    - eine Egalisierwalze (4), die der Zerkleinerungswalze (3) in der Drehrichtung (R) des Zylinders (2) vorgelagert angeordnet ist,
    - Mittel zum Halten (6) der Egalisierwalze (4) in der Nähe und beabstandet von der Laufbahn des Zylinders (2), die jeglichen Kontakt zwischen der Egalisierwalze (4) und der Laufbahn (20) verhindern,
    wobei bei dem Verfahren während jeder Umdrehung des Zylinders (2) das Material nacheinander unter der Egalisierwalze (4) und dann unter der Zerkleinerungswalze (3) durchläuft, wobei die Egalisierwalze (4) auf das Materialbett (5) einen Druck ausübt, der seine Oberfläche ebnet, der niedriger als der Druck (P) ist, der durch die Zerkleinerungswalze (3) auf das Materialbett (5) ausgeübt wird.
  2. Verfahren zum Zerkleinern nach Anspruch 1, wobei die Mittel zum Halten (6) der Egalisierwalze (4) einen Mindestabstand zwischen der Laufbahn (20) und der Oberfläche der Egalisierwalze (4) garantieren, und wobei der Brecher mit einer bestimmten maximalen Korngröße beschickt wird, die zwischen 1 mm und 120 mm liegt, und der Mindestabstand festgelegt wird, der größer als oder gleich dem 0,5-fachen der ermittelten maximalen Korngröße ist.
  3. Verfahren zum Zerkleinern nach Anspruch 2, wobei die Egalisierwalze (4) frei drehbar ist, in Rotation um ihre Achse versetzt aufgrund der Reibung mit dem Materialbett (5).
  4. Verfahren zum Zerkleinern nach Anspruch 2, das Motormittel aufweist, um die Egalisierwalze (4) derart in Drehung zu versetzen, dass ihre Umfangsgeschwindigkeit gleich der Durchschnittsgeschwindigkeit des Materialbettes (5) ist, auf das die Egalisierwalze (4) angewandt wird.
  5. Verfahren zum Zerkleinern nach einem der Ansprüche 1 bis 4, wobei Körner von maximaler Größe zwischen 1 mm und 120 mm verarbeitet werden und wobei der Durchmesser der Egalisierwalze (4) zwischen 100 mm und 660 mm gewählt wird.
  6. Verfahren zum Zerkleinern nach einem der Ansprüche 1 bis 5, wobei die Mittel zum Halten (6) der Egalisierwalze (4) Gelenkmittel, die geeignet sind, die Verschiebung der Egalisierwalze (4) in einer im Wesentlichen radialen Richtung zur Achse (A) des Zylinders (2) zu gestatten, und elastische Mittel aufweisen, die die Egalisierwalze (4) in die entgegengesetzte Richtung zu der Laufbahn (20) zwingen.
  7. Verfahren zum Zerkleinern nach Anspruch 6, wobei die Mittel zum Halten (6) der Egalisierwalze (4) das Halten der Egalisierwalze (4) an ihren beiden Enden gewährleisten, wobei die Gelenkmittel der Mittel zum Halten (6) zwei Arme (60) aufweisen, die jeweils einerseits an einem der Enden des Arms (60) an die Egalisierwalze (4) entlang der Achse der Egalisierwalze (4) und andererseits an dem anderen Ende des Arms (60) an einen Rahmen des Brechers (1) entlang einer Rotationsachse (B) parallel zur Achse (A) des Zylinders (2) angelenkt sind.
  8. Verfahren zum Zerkleinern nach einem der Ansprüche 1 bis 7, wobei die Länge der Egalisierwalze (4) größer als oder gleich der Länge der Zerkleinerungswalze (3) ist, wobei die Egalisierwalze (4) in Übereinstimmung mit der Zerkleinerungswalze (3) entlang der Länge des Zylinders (2) angeordnet ist.
  9. Verfahren zum Zerkleinern nach einem der Ansprüche 1 bis 8, das Mitteln zum Steuern der Verschiebung des Materials entlang der Länge des Zylinders (2) aufweist, so dass das Material nur einen Bruchteil der Länge des Zylinderabschnitts (2) bei jeder Umdrehung des Zylinders (2) durchläuft und mehrmals zwischen dem Zylinder (2) und der Zerkleinerungswalze (3) von dem Einlass (7) für das Zuführen des zu zerkleinernden Materials zu dem Auslass (8) für das zerkleinerte Material durchläuft, und wobei der Abstand (d) zwischen der Oberfläche der Egalisierwalze (4) und der Laufbahn (20) entlang der Länge des Zylinders (2) von dem Einlass (7) zu dem Auslass (8) abnehmend variabel ist.
  10. Verfahren zum Zerkleinern nach einem der Ansprüche 1 bis 8, wobei die Rotationsachse der Egalisierwalze (4) parallel zur Achse (A) des Zylinders (2) ist.
  11. Verfahren zum Zerkleinern nach einem der Ansprüche 1 bis 10, wobei die Mittel zum Anlegen der Zerkleinerungswalze gegen die Laufbahn des Zylinders derart sind, dass die Zerkleinerungswalze (3) einen durchschnittlichen Druck zwischen 10 MPa und 40 MPa auf das Materialbett ausübt und die Mittel zum Halten (6) der Egalisierwalze (4) derart sind, dass die Egalisierwalze (4) einen Druck von weniger als 10 MPa, vorzugsweise weniger als 1 MPa auf das Materialbett (5) ausübt.
  12. Verfahren zum Zerkleinern nach einem der Ansprüche 1 bis 11, wobei der Brecher (1) mit einem Material mit einer bestimmten maximalen Korngröße beschickt wird und der Durchmesser der Egalisierwalze (4) wie folgt ausgewählt wird:
    - zwischen dem 2- und 6-fachen der maximalen Größe der zu zerkleinernden Körner, wenn, unter dieser letzten Bedingung der Durchmesser der Egalisierwalze größer als oder gleich dem 0,15-fachen des Durchmessers der Zerkleinerungswalze (3) ist, und anderenfalls
    - mindestens gleich dem 0,15-fachen des Durchmessers der Zerkleinerungswalze (3).
  13. Verfahren zum Zerkleinern nach Anspruch 6, wobei der Brecher (1) mit einem Material mit einer bestimmten maximalen Korngröße beschickt wird und der Verschiebeweg der Egalisierwalze (4) derart angepasst wird, dass die Oberfläche der Egalisierwalze (4) in einem Abstand von der Laufbahn (20) gehalten wird, der zwischen dem 0,5-fachen und dem 3-fachen der maximalen Größe der zu zerkleinernden Körner liegt.
  14. Verfahren zum Zerkleinern nach einem der Ansprüche 1 bis 13, wobei das Material in dem Brecher (1) im Trockenverfahren zerkleinert wird.
  15. Brecher (1) durch Kompression eines Materialbettes (5), umfassend:
    - einen Zylinder (2) mit horizontaler Achse (A), dessen Innenwand eine Laufbahn (20) für eine Zerkleinerungswalze (3) aufweist, die im Inneren des Zylinders angeordnet ist (2),
    - Mittel zur Rotation des Zylinders um seine Achse (A),
    - die Zerkleinerungswalze (3), deren Achse parallel zu derjenigen der Achse (A) des Zylinders (2) verläuft,
    - Mittel zum Anlegen der Zerkleinerungswalze (3) gegen die Laufbahn (20) des Zylinders (2),
    - einen Einlass (7) für das Zuführen des zu zerkleinernden Materials, der an einem der Enden des Zylinders (2) angeordnet ist, und einen Auslass (8) für das zerkleinerte Material an dem anderen Ende des Zylinders (2),
    dadurch gekennzeichnet, dass es Folgendes aufweist:
    - eine Egalisierwalze (4), die der Zerkleinerungswalze (3) in der Drehrichtung (R) des Zylinders (2) vorgelagert angeordnet ist, dazu bestimmt, die Oberfläche des Materialbettes zu ebnen,
    - Mittel zum Halten (6) der Egalisierwalze (4) in der Nähe und beabstandet von der Laufbahn des Zylinders (2), die jeglichen Kontakt zwischen der Egalisierwalze (4) und der Laufbahn (20) verhindern,
    und wobei die Mittel zum Halten (6) der Egalisierwalze (4) in der Nähe und beabstandet von der Laufbahn des Zylinders (2) einerseits und die Mittel zum Anlegen der Zerkleinerungswalze (3) gegen die Laufbahn (20) des Zylinders (2) andererseits derart sind, dass die Egalisierwalze (4) geeignet ist, auf das Materialbett (5) einen Druck auszuüben, der seine Oberfläche ebnet, der niedriger als der Druck (P) ist, der durch die Zerkleinerungswalze (3) auf das Materialbett (5) ausgeübt wird.
  16. Verwendung des Verfahrens zum Zerkleinern nach einem der Ansprüche 1 bis 14 oder des Brechers (1) nach Anspruch 15 zum Zerkleinern von Mineralstoffen und/oder zum Zerkleinern von Stoffen bei der Herstellung von Zementklinker.
EP12816691.5A 2011-12-02 2012-11-30 Gutbettwalzenmühle Active EP2785461B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1103689A FR2983418B1 (fr) 2011-12-02 2011-12-02 Broyeur par compression de lit de matieres
PCT/FR2012/052768 WO2013079883A1 (fr) 2011-12-02 2012-11-30 Broyeur par compression de lit de matières

Publications (2)

Publication Number Publication Date
EP2785461A1 EP2785461A1 (de) 2014-10-08
EP2785461B1 true EP2785461B1 (de) 2016-02-03

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Country Status (12)

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US (1) US9675977B2 (de)
EP (1) EP2785461B1 (de)
JP (1) JP6386380B2 (de)
CN (1) CN103998137B (de)
BR (1) BR112014013272A2 (de)
CA (1) CA2855958C (de)
DK (1) DK2785461T3 (de)
FR (1) FR2983418B1 (de)
MX (1) MX342818B (de)
RU (1) RU2601582C2 (de)
UA (1) UA111638C2 (de)
WO (1) WO2013079883A1 (de)

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FR3026967B1 (fr) * 2014-10-10 2016-10-28 Fives Fcb Broyeur par compression de lit de matieres
PE20211616A1 (es) * 2018-08-28 2021-08-23 Canada Mining Innovation Council Molino triturador de un solo rodillo
US20220219281A1 (en) * 2019-05-02 2022-07-14 Koolmill Systems Limited Abrading apparatus
CN114838360B (zh) * 2022-04-29 2025-07-29 江门市崖门新财富环保工业有限公司 一种碾压式滚筒热解装置
CN119056516B (zh) * 2024-11-01 2025-03-14 南通泱絮新材料科技有限公司 一种陶瓷制品加工用原料研磨混合装置

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Publication number Publication date
FR2983418A1 (fr) 2013-06-07
DK2785461T3 (en) 2016-03-07
EP2785461A1 (de) 2014-10-08
BR112014013272A2 (pt) 2017-06-13
MX2014006565A (es) 2014-07-09
JP2015500137A (ja) 2015-01-05
WO2013079883A1 (fr) 2013-06-06
FR2983418B1 (fr) 2013-11-22
US20140326810A1 (en) 2014-11-06
CN103998137B (zh) 2016-09-07
US9675977B2 (en) 2017-06-13
UA111638C2 (uk) 2016-05-25
RU2601582C2 (ru) 2016-11-10
CA2855958A1 (fr) 2013-06-06
JP6386380B2 (ja) 2018-09-05
MX342818B (es) 2016-10-12
RU2014126878A (ru) 2016-01-27
CA2855958C (fr) 2019-02-26
CN103998137A (zh) 2014-08-20

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