EP1009529B1 - Improvements to crushers with ring-shaped track and roller - Google Patents

Improvements to crushers with ring-shaped track and roller Download PDF

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Publication number
EP1009529B1
EP1009529B1 EP97918239A EP97918239A EP1009529B1 EP 1009529 B1 EP1009529 B1 EP 1009529B1 EP 97918239 A EP97918239 A EP 97918239A EP 97918239 A EP97918239 A EP 97918239A EP 1009529 B1 EP1009529 B1 EP 1009529B1
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Prior art keywords
track
edge
roll
roller
matter
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EP97918239A
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German (de)
French (fr)
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EP1009529A1 (en
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Philippe Chevalier
Alain Cordonnier
Philippe Lagache
Christophe Obry
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FCB CIMENT
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FCB Ciment
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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
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/003—Shape or construction of discs or rings
    • 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

Definitions

  • the present invention relates to shredders comprising an annular track with an axis horizontal, a roller capable of rolling on said track, means for pressing the roller on the track and means for moving the material from one edge to the other of the track, so that it passes under the roller several times before being evacuated.
  • the mill object of the present invention is characterized in that the spacing between the roller and the track decreases from the edge of the track located on the feed side material to be ground up to a distance from this edge at least equal to 80% of the width of the track, and then grows faster to form a decompression zone on the side of the evacuation of the ground material.
  • the crusher shown in the drawings consists of a drum 10, with a horizontal axis, which is supported by pads 12 allowing its rotation about its axis; these skates could be replaced by a bearing or rollers.
  • the drum is rotated by conventional means, not shown, for example by a motor and a reduction gear, the output shaft carries a pinion engaged with a ring gear fixed on the drum.
  • the track is formed of three surfaces frustoconical 14a, 14b and 14c joined so that its diameter decreases, in the direction of progression of the material indicated by the arrow, over most of its width and then increases quickly in its last part.
  • the angle at the top of the surface 14a is greater than that of the surface 14b.
  • the surface 14c of the track and the roller define the area of decompression. In the plane of the figure, which contains the axes of the roller and the track, the angle ⁇ formed by this part of the track and the roller is less than 50 °.
  • the surface of the roller 16 is cylindrical and its axis is parallel to that of the track.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Road Repair (AREA)
  • Nonmetallic Welding Materials (AREA)

Abstract

PCT No. PCT/FR97/00682 Sec. 371 Date Nov. 2, 1999 Sec. 102(e) Date Nov. 2, 1999 PCT Filed Apr. 15, 1997 PCT Pub. No. WO98/46357 PCT Pub. Date Oct. 22, 1998A grinder having an annular track with a horizontal axis (14), a roller (16) capable of travelling over the track, a mechanism for pressing the roller against the track and means (18) for displacing the material from one edge of the track to the other in such a way that it passes several times beneath the roller before being evacuated. To enhance the efficiency of the grinder and the distribution of mechanical stresses in the roller and the track, the track (14) and the roller (16) are designed in such a way that the gap between them decreases from the edge of the track (14) located on the side for supplying the material to be ground to a distance from this edge at least equal to 80% of the width of the track, and in that this interval then swiftly increases to form a decompression area (19) on the ground material evacuation side.

Description

La présente invention concerne les broyeurs comportant une piste annulaire à axe horizontal, un rouleau apte à rouler sur ladite piste, des moyens pour presser le rouleau sur la piste et des moyens pour déplacer la matière d'un bord à l'autre de la piste, de telle sorte qu'elle passe plusieurs fois sous le rouleau avant d'être évacuée.The present invention relates to shredders comprising an annular track with an axis horizontal, a roller capable of rolling on said track, means for pressing the roller on the track and means for moving the material from one edge to the other of the track, so that it passes under the roller several times before being evacuated.

Pour améliorer le broyage lorsque les matières à broyer ont une granulométrie hétérogène on a proposé (brevet français n° 91 09788) de donner au rouleau et/ou à la piste un profil tel que l'écartement entre le rouleau et la piste décroisse progressivement ou par degrés d'un bord à l'autre de la piste.To improve grinding when the materials to be ground have a particle size heterogeneous it has been proposed (French patent n ° 91 09788) to give to the roller and / or to the track a profile such that the distance between the roller and the track decreases progressively or by degrees across the runway.

Le but de la présente invention est d'améliorer l'efficacité des broyeurs de ce type et de mieux répartir les contraintes mécaniques dans le rouleau et la piste.The object of the present invention is to improve the efficiency of shredders of this type and to better distribute the mechanical stresses in the roller and the track.

Le broyeur objet de la présente invention est caractérisé en ce que l'écartement entre le rouleau et la piste décroít depuis le bord de la piste situé du côté de l'alimentation en matière à broyer jusqu'à une distance de ce bord au moins égale à 80 % de la largeur de la piste, et croít ensuite plus rapidement pour former une zone de décompression du côté de l'évacuation de la matière broyée.The mill object of the present invention is characterized in that the spacing between the roller and the track decreases from the edge of the track located on the feed side material to be ground up to a distance from this edge at least equal to 80% of the width of the track, and then grows faster to form a decompression zone on the side of the evacuation of the ground material.

Suivant une forme de réalisation préférée, la piste est constituée par un anneau solidaire d'un tambour à axe horizontal qui forme une chambre d'alimentation sur un côté de la piste et une chambre d'évacuation sur l'autre côté, et un barrage annulaire est prévu à l'extrémité de la chambre d'évacuation opposée à celle attenante à la pisté pour maintenir dans ladite chambre une couche de matière broyée dont l'épaisseur est telle qu'elle atteint pratiquement le bord du rouleau dans le plan du bord adjacent de la piste.According to a preferred embodiment, the track is constituted by a ring integral with a drum with a horizontal axis which forms a supply chamber on one side of the runway and an evacuation chamber on the other side, and an annular barrier is provided at the end of the evacuation chamber opposite to that adjoining the tracked to keep in said chamber a layer of ground material whose thickness is such that it reaches practically the edge of the roller in the plane of the adjacent edge of the track.

De préférence, l'étendue axiale de la zone de décompression, comptée à partir du bord de la piste située du côté de l'évacuation de la matière, est comprise entre 2 % et 20 %, de préférence 5 % à 15 %, de la largeur de la piste, et dans cette zone l'angle formé par la piste et la surface périphérique du rouleau, dans le plan contenant les axes de la piste et du rouleau, est inférieur à 50°.Preferably, the axial extent of the decompression zone, counted from the edge of the track located on the discharge side of the material, is between 2% and 20%, preferably 5% to 15%, of the width of the track, and in this area the angle formed by the track and the peripheral surface of the roller, in the plane containing the axes of the track and the roller, is less than 50 °.

Suivant une forme de réalisation du broyeur, la piste est cylindrique et le rouleau est formé d'au moins deux parties tronconiques, une première partie dont le diamètre croit depuis son extrémité située côté alimentation jusqu'à une distance de cette extrémité au moins égale à 80 % de la longueur axiale du rouleau, et une seconde partie de diamètre décroissant située à son autre extrémité.According to one embodiment of the crusher, the track is cylindrical and the roller is formed of at least two frustoconical parts, a first part whose diameter increases since its end located on the supply side up to a distance from this end at least equal at 80% of the axial length of the roll, and a second part of decreasing diameter located at its other end.

En variante, la piste peut avoir un profil tronconique avec un diamètre qui décroít depuis son bord situé du côté de l'alimentation en matière à broyer jusqu'à la zone de décompression et un angle au sommet constant ou variable ; dans la zone de décompression, le diamètre de la piste croít dans le sens de progression de la matière. Avec une telle piste, on pourra utiliser un rouleau cylindrique dont l'axe sera parallèle à l'axe de la piste ou fera un angle inférieur à 5° avec celui-ci.Alternatively, the track may have a frustoconical profile with a decreasing diameter from its edge located on the feed side of the material to be ground up to the decompression and a constant or variable vertex angle; in the decompression zone, the diameter of the track increases in the direction of progression of the material. With such a track, we may use a cylindrical roller whose axis will be parallel to the axis of the track or will make a angle less than 5 ° with it.

La description qui suit se réfère aux dessins l'accompagnant qui montrent, à titre d'exemples non limitatifs, plusieurs formes de réalisation de l'invention et sur lesquels :

  • La figure 1 est une coupe verticale d'un broyeur réalisé conformément à l'invention ;
  • La figure 2 est une coupe, par un plan perpendiculaire à l'axe, du broyeur de la figure 1 ; et
  • Les figures 3 et 4 illustrent deux autres formes de réalisation de l'invention.
    • The description which follows refers to the accompanying drawings which show, by way of nonlimiting examples, several embodiments of the invention and in which:
  • Figure 1 is a vertical section of a mill made according to the invention;
  • Figure 2 is a section through a plane perpendicular to the axis of the crusher of Figure 1; and
  • Figures 3 and 4 illustrate two other embodiments of the invention.

    • Le broyeur représenté sur les dessins est constitué par un tambour 10, à axe horizontal, qui est supporté par des patins 12 permettant sa rotation autour de son axe ; ces patins pourraient être remplacés par un coussinet ou des galets. Le tambour est entraíné en rotation par des moyens classiques, non représentés, par exemple par un moteur et un réducteur dont l'arbre de sortie porte un pignon en prise avec une couronne dentée fixée sur le tambour.The crusher shown in the drawings consists of a drum 10, with a horizontal axis, which is supported by pads 12 allowing its rotation about its axis; these skates could be replaced by a bearing or rollers. The drum is rotated by conventional means, not shown, for example by a motor and a reduction gear, the output shaft carries a pinion engaged with a ring gear fixed on the drum.

    Le tambour est constitué par une virole revêtue intérieurement de plaques d'usure qui, dans la partie centrale, forment une piste de broyage annulaire 14, à surface cylindrique. L'intérieur du tambour est ainsi divisé en une zone d'alimentation 11, une zone de broyage 13 et une zone d'évacuation 15. Des rebords annulaires 17 prévus aux deux extrémités de la virole forment des barrages permettant de maintenir une couche de matière dans les zones d'alimentation et d'évacuation. Ce tambour est fermé à ses deux extrémités par des tôles montées sur un support fixe et auxquelles sont raccordées une goulotte d'alimentation, à une extrémité, une goulotte de décharge et un conduit d'aspiration pour l'évacuation pneumatique des particules fines, à l'autre extrémité.The drum consists of a ferrule internally coated with wear plates which, in the central part, form an annular grinding track 14, with a cylindrical surface. The interior of the drum is thus divided into a feed zone 11, a grinding zone 13 and a discharge zone 15. Annular flanges 17 provided at the two ends of the shell form dams to maintain a layer of material in the areas supply and discharge. This drum is closed at both ends by sheets mounted on a fixed support and to which a feed chute is connected, to a end, a discharge chute and a suction duct for pneumatic evacuation fine particles at the other end.

    Un rouleau 16 est monté à l'intérieur du tambour, de façon à pouvoir rouler sur la piste 14 lorsque le tambour est entraíné en rotation. Plus précisément, lorsque le broyeur est en fonctionnement, le rouleau roule sur la couche de matière recouvrant la piste. Le rouleau est muni de deux bouts d'arbre montés dans des paliers fixés à deux leviers disposés à l'extérieur des tambours, de part et d'autre de celui-ci. Des ressorts ou des vérins hydropneumatiques agissant sur les paliers ou sur les leviers permettent de presser le rouleau sur la piste de broyage avec une force prédéterminée et réglable.A roller 16 is mounted inside the drum, so that it can roll on the track 14 when the drum is rotated. Specifically, when the mill is in operation, the roller rolls on the layer of material covering the track. The roller is provided with two shaft ends mounted in bearings fixed to two levers arranged at the outside of the drums on either side of it. Springs or cylinders hydropneumatic acting on the bearings or on the levers to press the roller on the grinding track with a predetermined and adjustable force.

    Le rouleau 16 se compose de trois parties tronconiques, de conicités différentes. Les deux parties principales 16a et 16b s'étendent sur environ 80 % de la longueur du rouleau ; leur diamètre croit dans le sens de progression de la matière sur la piste (sens de la flèche sur la figure 1) et l'angle au sommet de la partie 16a, la plus proche de la zone d'alimentation, est supérieur à celui de la partie 16b. La partie 16c, située du côté de la zone d'évacuation, a un diamètre qui décroít dans le sens de progression de la matière et son angle (α) au sommet est nettement supérieur à celui des deux autres parties mais inférieur à 50° ; la longueur axiale de cette partie est comprise entre 2 % et 20 %, de préférence 5 et 15 %, de la longueur utile du rouleau. Elle délimite avec la piste une zone de décompression 19 qui fait suite à la zone de mise en pression de la matière entre le rouleau et la piste. Cette zone de décompression et la couche de matière 20 formée dans la zone d'évacuation s'opposent à l'éjection brutale de la matière comprimée entre la piste et le rouleau, près du bord du rouleau, (effet de bord). Cela permet de mieux contrôler le broyage dans la zone adjacente à la zone de décompression. En outre, la zone de décompression permet d'assurer une meilleure répartition des contraintes mécaniques dans le rouleau près de sa face latérale. L'épaisseur de la couche de matière 20 formée dans la zone d'évacuation 15 est telle qu'elle atteint pratiquement le bord du rouleau dans le plan du bord de la piste adjacent à cette zone.The roller 16 is made up of three frustoconical parts, with different conicities. The two main parts 16a and 16b extend over approximately 80% of the length of the roller; their diameter increases in the direction of progression of the material on the track (direction of the arrow on Figure 1) and the angle at the top of part 16a, closest to the feeding zone, is greater than that of part 16b. Part 16c, located on the side of the evacuation zone, has a diameter which decreases in the direction of progression of the material and its angle (α) at the top is significantly higher than that of the other two parts but less than 50 °; the axial length of this part is between 2% and 20%, preferably 5 and 15%, of the useful length of the roller. It defines with the track a decompression zone 19 which follows the zone for pressurizing the material between the roller and the track. This decompression zone and the layer of material 20 formed in the evacuation zone oppose the sudden ejection of the material compressed between the track and the roller, near the edge of the roller, (edge effect). it allows better control of grinding in the area adjacent to the decompression area. In in addition, the decompression zone ensures better stress distribution mechanical in the roller near its side face. The thickness of the material layer 20 formed in the discharge zone 15 is such that it practically reaches the edge of the roller in the plane of the edge of the runway adjacent to this zone.

    Un dispositif destiné à assurer l'avance pas à pas de la matière, d'une extrémité à l'autre du tambour, est disposé dans la moitié supérieure de ce dernier, sur la partie descendante de la trajectoire circulaire des matières. Ce dispositif a été schématisé sur la figure 1 par une série de lames inclinées 18 qui détachent de la paroi du tambour et de la piste la matière qui y est normalement maintenue par la force centrifuge. La matière détachée glisse sur les lames 18 et, du fait de leur inclinaison y est déplacée de l'entrée vers la sortie du broyeur. En réglant l'inclinaison des lames 18 on règle la vitesse d'avance de la matière ; des vitesses différentes peuvent être choisies pour les zones d'alimentation, de broyage et d'évacuation. En variante, le dispositif d'avance de la matière pourrait être du type décrit dans le brevet français n° 91.09788 précité.A device intended to ensure the step-by-step advance of the material, from one end to the other drum, is arranged in the upper half of the latter, on the descending part of the circular trajectory of materials. This device has been shown diagrammatically in FIG. 1 by a series inclined blades 18 which detach the material therein from the wall of the drum and the track normally maintained by centrifugal force. The loose material slides on the blades 18 and, because of their inclination, is moved there from the inlet to the outlet of the mill. By adjusting the inclination of the blades 18 the speed of advance of the material is adjusted; different speeds can be chosen for feeding, crushing and disposal areas. Alternatively, the material advance device could be of the type described in French patent no. 91.09788 cited above.

    Sur la figure 3, on a représenté schématiquement une autre forme de réalisation de la piste et du rouleau. Au lieu d'être cylindrique, la piste est formée de trois surfaces tronconiques 14a, 14b et 14c accolées de telle sorte que son diamètre décroít, dans le sens de progression de la matière indiqué par la flèche, sur la majeure partie de sa largeur puis croít rapidement dans sa dernière partie. L'angle au sommet de la surface 14a est plus grand que celui de la surface 14b. La surface 14c de la piste et le rouleau définissent la zone de décompression. Dans le plan de la figure, qui contient les axes du rouleau et de la piste, l'angle α que forment cette partie de la piste et le rouleau est inférieur à 50°. La surface du rouleau 16 est cylindrique et son axe est parallèle à celui de la piste.In Figure 3, there is shown schematically another embodiment of the track and roller. Instead of being cylindrical, the track is formed of three surfaces frustoconical 14a, 14b and 14c joined so that its diameter decreases, in the direction of progression of the material indicated by the arrow, over most of its width and then increases quickly in its last part. The angle at the top of the surface 14a is greater than that of the surface 14b. The surface 14c of the track and the roller define the area of decompression. In the plane of the figure, which contains the axes of the roller and the track, the angle α formed by this part of the track and the roller is less than 50 °. The surface of the roller 16 is cylindrical and its axis is parallel to that of the track.

    Dans la forme de réalisation représentée sur la figure 4, la piste comporte une première partie tronconique, à diamètre décroissant dans le sens de progression de la matière (flèche), et une seconde partie cylindrique. Le rouleau est cylindrique et son axe est incliné par rapport à l'axe de la piste d'un angle β compris inférieur à 5°. Il comporte à son extrémité adjacente à la zone d'évacuation une portion tronconique définissant, avec la piste, une zone de décompression.In the embodiment shown in Figure 4, the track has a first frustoconical part, with decreasing diameter in the direction of progression of the material (arrow), and a second cylindrical part. The roller is cylindrical and its axis is inclined relative to to the center line of the runway with an angle β of less than 5 °. It has at its adjacent end to the evacuation zone a frustoconical portion defining, with the runway, a zone of decompression.

    D'autres formes de la piste et du rouleau peuvent être choisies dans le cadre des revendications pour obtenir un écartement décroissant, dans le sens de progression de la matière, entre la piste et le rouleau, sur la majeure partie de la largeur de la piste, et ménager une zone de décompression du côté de la zone d'évacuation.Other shapes of the track and of the roller can be chosen within the scope of the claims in order to obtain a decreasing spacing, in the direction of progression of the material, between the track and the roller, over most of the width of the track, and leave a decompression zone on the side of the evacuation area.

    Claims (5)

    1. A crusher, comprising at least one annular track with horizontal axis (14), at least one roll (16) capable of running on said track, means to press the roll onto the track, and means to move the matter from one edge to the other of the track so that said matter passes several times below the roll before evacuation, whereas the gap between the roll (16) and the track (14) decreases in the forward direction of the matter to be crushed, characterised in that said gap between the roll (16) and the track (14) decreases from the edge of the track situated on the infeed side of the matter to be crushed up to a distance from said edge at least equal to 80% of the width of the track, and in that said gap then increases rapidly to form a decompression zone (19) of the evacuation side of the crushed matter, and in that the track (14) consists of a ring integral with a coaxial drum (10) which forms an evacuation chamber (15) on one side of the track, and an annular barrier (17) is provided at the end of the evacuation chamber furthermost from the track in order to maintain, inside said chamber, a layer of crushed matter, whereof the thickness is such that it reaches practically the edge of the roll on the plane of the adjacent edge of the track.
    2. A crusher according to claim 1, characterised in that, on the plane containing the axis of the roll and of the track, the angle (α) formed by the track and the roll in the decompression zone (19) is smaller than 50°.
    3. A crusher according to claim 1 or 2, characterised in that the track (14) is cylindrical and the roll is formed of at least two truncated sections, a first section (16a, 16b) whereof the diameter increases from its end situated on the infeed side up to a distance from said end at least equal to 80% of the axial length of the roll, and a second section (16c) with decreasing diameter, situated at its other end.
    4. A crusher according to claim 1, 2 or 3, characterised in that the track is formed of at least two truncated surfaces, a first surface (14a, 14b) whereof the diameter decreases from its edge situated on the infeed side up to a distance from said edge at least equal to 80% of the width of the track, and a second surface (14c) with increasing diameter, adjacent to its other edge.
    5. A crusher according to claim 1, 2, 3 or 4, characterised in that the axis of the roll is tilted with respect to the axis of the track by an angle (β) smaller than 5°.
    EP97918239A 1997-04-15 1997-04-15 Improvements to crushers with ring-shaped track and roller Expired - Lifetime EP1009529B1 (en)

    Applications Claiming Priority (1)

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    PCT/FR1997/000682 WO1998046357A1 (en) 1997-04-15 1997-04-15 Improvements to crushers with ring-shaped track and roller

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    EP1009529A1 EP1009529A1 (en) 2000-06-21
    EP1009529B1 true EP1009529B1 (en) 2003-06-25

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    EP (1) EP1009529B1 (en)
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    AT (1) ATE243563T1 (en)
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    ATE551123T1 (en) * 2007-09-06 2012-04-15 Lowan Man Pty Ltd MILL AND GRINDING PROCESS
    FR3026967B1 (en) * 2014-10-10 2016-10-28 Fives Fcb COMPRESSOR BINDER OF BED OF MATERIALS
    JP5859698B1 (en) * 2015-04-17 2016-02-10 三菱日立パワーシステムズ株式会社 Crushing roller and crushing device
    CN113333105B (en) * 2021-05-20 2022-08-02 萍乡市华顺环保化工填料有限公司 Grinding equipment is used in aluminium oxide production

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    FR2742075B1 (en) * 1995-12-07 1998-02-20 Fcb IMPROVEMENTS ON ANNULAR TRACK AND ROLLER CRUSHERS

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    DE69723115T2 (en) 2004-04-29
    EP1009529A1 (en) 2000-06-21
    CA2285654A1 (en) 1998-10-22
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    CA2285654C (en) 2003-07-01
    JP2001518841A (en) 2001-10-16
    UA46143C2 (en) 2002-05-15
    AU2643997A (en) 1998-11-11
    SK139199A3 (en) 2000-05-16
    WO1998046357A1 (en) 1998-10-22
    PL186892B1 (en) 2004-03-31
    CZ295375B6 (en) 2005-07-13
    US6138933A (en) 2000-10-31
    ATE243563T1 (en) 2003-07-15
    JP3710829B2 (en) 2005-10-26
    CZ349299A3 (en) 2000-05-17
    ES2202603T3 (en) 2004-04-01
    PL336308A1 (en) 2000-06-19
    DK1009529T3 (en) 2003-09-29

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