EP0645190A2 - Lifter element for tube mill and tube mill provided with such elements - Google Patents

Lifter element for tube mill and tube mill provided with such elements Download PDF

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Publication number
EP0645190A2
EP0645190A2 EP94114265A EP94114265A EP0645190A2 EP 0645190 A2 EP0645190 A2 EP 0645190A2 EP 94114265 A EP94114265 A EP 94114265A EP 94114265 A EP94114265 A EP 94114265A EP 0645190 A2 EP0645190 A2 EP 0645190A2
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EP
European Patent Office
Prior art keywords
elements
mill
lifting
crusher
grinding machines
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Granted
Application number
EP94114265A
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German (de)
French (fr)
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EP0645190A3 (en
EP0645190B1 (en
Inventor
Jean-Marie Brisbois
Serge Rycerski
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Magotteaux International SA
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Magotteaux International 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
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details
    • B02C17/22—Lining for containers
    • B02C17/225—Lining for containers using rubber or elastomeric material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S241/00—Solid material comminution or disintegration
    • Y10S241/30—Rubber elements in mills

Definitions

  • the present invention relates to a lifting element for a rotary mill consisting of a parallelepipedal elastomer block designed to be fixed to the inner wall of a rotary mill containing grinding machines and to form part of the shielding thereof.
  • the invention also relates to a rotary crusher comprising a cylindrical shell, the inner shielding of which includes such lifters.
  • the invention relates more particularly to the field of wet mills, in particular those used in cement works or in the mining industry for crushing and grinding ores.
  • These grinders consist of a cylindrical shell rotating around its longitudinal axis and containing a grinding load consisting of grinding machines such as balls, cylpebs, boulpebs, etc. of different dimensions.
  • the ferrule has an inner shield consisting of shielding plates and so-called lifting elements or levers having the function of brewing and driving the grinding load and the material to be ground. This is introduced on one side of the mill and, as it progresses towards the exit, on the opposite side, it is ground and crushed between the grinding machines.
  • the grinding Since the grinding is carried out gradually in the direction of the passage through the grinder, the best grinding conditions are achieved when the size of the grinding machines is adapted to that of the material to be ground.
  • the largest grinding machines should preferably be concentrated on the inlet side of the crusher, while the smallest should be on the outlet side. This is called the classification of grinding machines according to their size. Under optimal conditions, this classification should therefore be carried out automatically during the operation of the mill.
  • the shields of mills working in the wet process have been either of cast iron or alloy steel or of elastomer.
  • the cast iron or alloy steel shields have the disadvantage of a heavy weight and a tedious handling during the installation of the elements forming the shielding. In addition, they are extremely noisy and no longer meet the increasingly severe environmental criteria.
  • the elastomeric shields had more lifting elements than those of the metallic shields. These thicker and more protruding elements always tend to project the grinding bodies during the rotation of the grinder. However, the projection of the grinding machines reduces the efficiency of the grinding and accelerates the wear of the grinding machines by fragmentation and micro-chipping.
  • the purpose of the present invention is to provide a new elastomeric lifting element which is less exposed to wear, as well as a crusher in which these new elements are arranged so as to ensure the desired classification of the grinding machines and to improve grinding efficiency.
  • the lifting element proposed by the present invention is characterized in that at least a part of its face exposed to the grinding machines has cells to allow the grinding machines to be embedded therein.
  • the grinding machines which thus become encrusted, during the grinding operation, in the lifting elements, generally remain attached thereto under the effect of the elasticity of the elastomer.
  • the invention also provides a mill equipped with such lifting elements and in which these elements and the armor plates are arranged in alternating longitudinal rows.
  • each row of lifting elements comprises, over at least part of the length of the ferrule, straight elements parallel to the generator of the ferrule and elements inclined relative to the generator of the ferrule.
  • Each straight element is preferably surrounded by two inclined elements and vice versa.
  • the straight elements and the inclined elements have different radial thicknesses. Thanks to this design, it causes, in the diametral planes of the mill, relative movements and sliding between the different layers of the grinding load and the material to be ground.
  • the reference 10 in FIG. 1 represents a metallic cylindrical shell of a crusher with an internal coating forming a shield 12 for protecting the shell 10.
  • This shield consists of shielding plates 14 as well as lifting elements 16 fixed to using appropriate bolts 18 on the ferrule.
  • the armor plates 14 are not fixed directly to the shell 10 but are held in place by means of the attachments of the neighboring lifting elements 16.
  • the ferrule 10 is designed to be rotated about its longitudinal axis in the direction of the arrow A. During this rotation, the function of the lifting elements 16 whose radial thickness is greater than that of the armor plates 14 is d '' drive the grinding charge and the material to be ground not shown. Since the mill is only partially filled, generally on the order of 30%, the grinding charge and the material to be ground accumulate, during the rotation of the mill, essentially in the fourth trigonometric quarter of the mill seen in the axial direction of Figure 1. Following the winding of this mass around oneself and the relative sliding between the different layers, the material is crushed progressively by the crushing charge as it progresses from the entry up to the mill outlet.
  • the lifting elements 16 are parallelepipedal blocks of elastomer, for example rubber, fixed in longitudinal rows on the wall of the shell 10.
  • the radial side 20 of each lifting element 16 in the attack zone of the grinding load, seen in the direction of rotation A, is shallower than the opposite radial side 22 so that the face 24 exposed to the load and connecting the sides 20 and 22 is oblique with respect to the shell.
  • This face 24 can be straight or slightly curved as shown in FIG. 1.
  • the face 24 of each lifting element 16 comprises a series of cells 26. These can be distributed in a regular or random manner over the entire length of the lifting elements, the main thing being that the grinding machines can become embedded therein during the operation of the crusher in order to improve the resistance of the lifting elements 16 to wear.
  • the dimensions of the lifting elements are generally larger if the filling factor of the mill is greater or if the mill rotates more slowly.
  • the armor plates 14 can be made of elastomer, either of the cellular type with inlay, or with a surface roughness.
  • the lifters are arranged in a particular arrangement contributing to greater grinding efficiency. Indeed, as shown in Figure 2, the lifting elements are arranged in longitudinal rows a which alternate with longitudinal rows b of armor plates.
  • each row a of lifting elements comprises, according to a preferred embodiment, a series of straight elements 16a, that is to say parallel to the generator of the mill and a series of inclined elements 16b relative to the generator of the mill.
  • the arrangement and arrangement of the straight elements 16a and of the inclined elements 16b can be modified over the length of the mill according to the operating conditions of the mill, in particular as regards the speed of rotation, the filling coefficient and the diameter of the mill.
  • each row has lifting elements comprises an alternating succession of straight elements and inclined elements. It is preferable to provide, in the entrance area of the grinder, not shown in the Figure but located on the left side thereof, only straight elements.
  • the lifting elements 16b are inclined in the direction of the outlet of the mill, which is on the right side of the Figure.
  • both the direction and the angle of inclination of the lifting elements can be modified according to the nature and shape of the grinding machines in order to obtain the best classification effect.
  • the straight lifting elements 16a and the inclined lifting elements 16b do not have the same thickness.
  • the inclined elements 16b are thicker than the straight elements 16a, but the opposite is also possible.
  • the purpose of this design is to cause, during the rotation of the mill, in diametrical planes, shearing between different layers of the grinding load and the material to be ground.
  • the level of the shielding is uniform from the inlet to the outlet of the mill.
  • the level of the shielding is slightly higher at the outlet than at the inlet so that the section of the mill is slightly convergent towards the outlet.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

The lifting element consists of a parallelepipedal elastomeric block designed to be fixed to the inside wall of a mill containing milling members. At least part of its face (24) exposed to the milling members includes cells (26) to allow the milling members to embed therein. The mill includes a cylindrical hoop (10) with longitudinal rows of these lifting elements with elements arranged parallel to the generatrix of the hoop and elements which are inclined with respect to this generatrix. <IMAGE>

Description

La présente invention concerne un élément de relevage pour broyeur rotatif constitué d'un bloc parallélépipédique en élastomère conçu pour être fixé sur la paroi intérieur d'un broyeur rotatif contenant des engins broyants et pour faire partie du blindage de celui-ci. L'invention concerne également un broyeur rotatif comprenant une virole cylindrique dont le blindage intérieur comporte de tels releveurs.The present invention relates to a lifting element for a rotary mill consisting of a parallelepipedal elastomer block designed to be fixed to the inner wall of a rotary mill containing grinding machines and to form part of the shielding thereof. The invention also relates to a rotary crusher comprising a cylindrical shell, the inner shielding of which includes such lifters.

L'invention concerne plus particulièrement le domaine des broyeurs en voie humide, notamment ceux utilisés en cimenterie ou dans l'industrie minière pour le concassage et le broyage des minerais. Ces broyeurs sont constitués d'une virole cylindrique tournant autour de son axe longitudinal et contenant une charge broyante constituée d'engins broyants tels que des boulets, cylpebs, boulpebs, etc de dimensions différentes.The invention relates more particularly to the field of wet mills, in particular those used in cement works or in the mining industry for crushing and grinding ores. These grinders consist of a cylindrical shell rotating around its longitudinal axis and containing a grinding load consisting of grinding machines such as balls, cylpebs, boulpebs, etc. of different dimensions.

La virole comporte un blindage intérieur constitué de plaques de blindage et de ce qu'on appelle des éléments de relevage ou releveurs ayant la fonction de brasser et d'entraîner la charge broyante et la matière à broyer. Celle-ci est introduite d'un côté du broyeur et, au fur et à mesure de sa progression vers la sortie, du côté opposé, elle est broyée et concassée entre les engins broyants.The ferrule has an inner shield consisting of shielding plates and so-called lifting elements or levers having the function of brewing and driving the grinding load and the material to be ground. This is introduced on one side of the mill and, as it progresses towards the exit, on the opposite side, it is ground and crushed between the grinding machines.

Étant donné que le broyage est réalisé progressivement dans le sens de la traversée du broyeur, les meilleures conditions de broyage sont réalisées lorsque la taille des engins broyants est adaptée à celle de la matière à broyer. Autrement dit, les engins broyants les plus gros devraient, de préférence, se concentrer du côté de l'entrée du broyeur, alors que les plus petits devraient se retrouver du côté de la sortie. C'est ce que l'on appelle le classement des engins broyants en fonction de leur taille. Dans les conditions optimales, ce classement devrait donc se réaliser automatiquement pendant le fonctionnement du broyeur.Since the grinding is carried out gradually in the direction of the passage through the grinder, the best grinding conditions are achieved when the size of the grinding machines is adapted to that of the material to be ground. In other words, the largest grinding machines should preferably be concentrated on the inlet side of the crusher, while the smallest should be on the outlet side. This is called the classification of grinding machines according to their size. Under optimal conditions, this classification should therefore be carried out automatically during the operation of the mill.

Par ailleurs, dans l'intérêt de l'efficacité du broyage et de la durée de vie des engins broyants, il faut, dans la mesure du possible, éviter les projections et chutes de ceux-ci au profit d'un glissement et malaxage intenses, favorables au concassage et broyage de la matière entre les engins broyants en mouvement.Furthermore, in the interest of efficient grinding and the lifetime of the grinding equipment, it is necessary, as far as possible, to avoid projections and falls thereof in favor of intense sliding and mixing. , favorable to the crushing and grinding of the material between the grinding machines in motion.

Jusqu'à présent, les blindages des broyeurs travaillant en voie humide étaient soit en fonte ou en acier alliés, soit en élastomère. Les blindages en fonte ou acier alliés ont l'inconvénient d'un poids élevé et d'une manipulation fastidieuse lors de la mise en place des éléments formant le blindage. En outre, ils sont extrêmement bruyants et ne répondent plus aux critères d'environnement de plus en plus sévères.Until now, the shields of mills working in the wet process have been either of cast iron or alloy steel or of elastomer. The cast iron or alloy steel shields have the disadvantage of a heavy weight and a tedious handling during the installation of the elements forming the shielding. In addition, they are extremely noisy and no longer meet the increasingly severe environmental criteria.

Pour résister à l'usure, les blindages en élastomère avaient des éléments de relevage plus importants que ceux des blindages métalliques. Ces éléments plus épais et plus saillants ont toujours tendance à projeter les corps broyants lors de la rotation du broyeur. Or, la projection des engins broyants réduit l'efficacité du broyage et accélère l'usure des engins broyants par fragmentation et micro-écaillage.To resist wear, the elastomeric shields had more lifting elements than those of the metallic shields. These thicker and more protruding elements always tend to project the grinding bodies during the rotation of the grinder. However, the projection of the grinding machines reduces the efficiency of the grinding and accelerates the wear of the grinding machines by fragmentation and micro-chipping.

En outre, on a constaté que des éléments de relevage épais et saillants en élastomère ont tendance à provoquer une ségrégation longitudinale des engins broyants contraire au classement visé, si bien que l'on retrouve, souvent, les petits engins broyants à l'entrée du broyeur et les plus gros du côté de la sortie, alors que, pour l'efficacité du broyage, c'est le contraire qui est visé.In addition, it has been found that thick and protruding elastomeric lifting elements tend to cause a longitudinal segregation of the grinding machines contrary to the intended classification, so that we often find small grinding machines at the entrance of the grinder and the larger on the outlet side, while for the efficiency of grinding, the opposite is targeted.

Le but de la présente invention est de prévoir un nouvel élément de relevage en élastomère qui est moins exposé à l'usure, ainsi qu'un broyeur dans lequel ces nouveaux éléments sont arrangés de manière à assurer le classement souhaité des engins broyants et à améliorer l'efficacité du broyage.The purpose of the present invention is to provide a new elastomeric lifting element which is less exposed to wear, as well as a crusher in which these new elements are arranged so as to ensure the desired classification of the grinding machines and to improve grinding efficiency.

Pour atteindre cet objectif, l'élément de relevage proposé par la présente invention est caractérisé en ce que au moins une partie de sa face exposée aux engins broyants comporte des alvéoles pour permettre aux engins broyants de s'y incruster.To achieve this objective, the lifting element proposed by the present invention is characterized in that at least a part of its face exposed to the grinding machines has cells to allow the grinding machines to be embedded therein.

Les engins broyants qui s'incrustent ainsi, lors de l'opération de broyage, dans les éléments de relevage, y restent généralement accrochés sous l'effet de l'élasticité de l'élastomère.The grinding machines which thus become encrusted, during the grinding operation, in the lifting elements, generally remain attached thereto under the effect of the elasticity of the elastomer.

Grâce à l'incrustation des engins broyants dans les éléments de relevage, on augmente leur résistance à l'usure, ce qui permet de réduire leur épaisseur ainsi que les risques de projection des engins broyants pour améliorer finalement l'efficacité du broyage.Thanks to the incrustation of the grinding machines in the lifting elements, their resistance to wear is increased, which makes it possible to reduce their thickness as well as the risks of projection of the grinding machines to ultimately improve the grinding efficiency.

L'invention prévoit également un broyeur équipé de tels éléments de relevage et dans lequel ces éléments et les plaques de blindage sont disposées en rangées longitudinales alternantes.The invention also provides a mill equipped with such lifting elements and in which these elements and the armor plates are arranged in alternating longitudinal rows.

Selon un mode réalisation préférée, chaque rangée d'éléments de relevage comporte, sur au moins une partie de la longueur de la virole, des éléments droits parallèles à la génératrice de la virole et des éléments inclinés par rapport à la génératrice de la virole. Chaque élément droit est, de préférence, entouré de deux éléments inclinés et vice-versa.According to a preferred embodiment, each row of lifting elements comprises, over at least part of the length of the ferrule, straight elements parallel to the generator of the ferrule and elements inclined relative to the generator of the ferrule. Each straight element is preferably surrounded by two inclined elements and vice versa.

Il a été constaté que cette combinaison alternante d'éléments droits et d'éléments inclinés favorise le classement des engins broyant sur la longueur du broyeur dans le sens voulu, c'est-à-dire que les engins broyants les plus volumineux restent à l'entrée du broyeur et les plus petits sont refoulés en direction de la sortie, là où la matière à broyer est plus fine.It has been found that this alternating combination of straight and inclined elements favors the classification of the grinding machines over the length of the mill in the desired direction, that is to say that the most bulky grinding machines remain at the entry grinder and the smallest are pushed back towards the outlet, where the material to be ground is finer.

Selon un autre aspect de l'invention, les éléments droits et les éléments inclinés ont des épaisseurs radiales différentes. Grâce à cette conception, on provoque, dans des plans diamétraux du broyeur, des mouvements et glissements relatifs entre les différentes couches de la charge broyante et de la matière à broyer.According to another aspect of the invention, the straight elements and the inclined elements have different radial thicknesses. Thanks to this design, it causes, in the diametral planes of the mill, relative movements and sliding between the different layers of the grinding load and the material to be ground.

D'autres particularités et caractéristiques de l'invention ressortiront d'un mode de réalisation préféré, présenté ci-dessous, à titre d'illustration, en référence aux dessins annexés dans lesquels :

  • la Figure 1 montre une partie d'une vue en coupe diamétrale d'un broyeur selon la présente invention ;
  • la Figure 2 montre une vue frontale d'une partie du blindage d'un broyeur et
  • la Figure 3 représente une coupe longitudinale suivant le plan de coupe III-III sur la Figure 2.
Other features and characteristics of the invention will emerge from a preferred embodiment, presented below, by way of illustration, with reference to the appended drawings in which:
  • Figure 1 shows part of a diametrical sectional view of a mill according to the present invention;
  • Figure 2 shows a front view of part of the shield of a mill and
  • FIG. 3 represents a longitudinal section along the section plane III-III in FIG. 2.

La référence 10 sur la Figure 1 représente une virole cylindrique métallique d'un broyeur avec un revêtement intérieur formant un blindage 12 de protection de la virole 10. Ce blindage est constitué de plaques de blindage 14 ainsi que d'éléments de relevage 16 fixés à l'aide de boulons appropriés 18 sur la virole. Dans l'exemple représenté, les plaques de blindage 14 ne sont pas fixées directement à la virole 10 mais sont maintenues en place grâce aux fixations des éléments de relevage avoisinants 16.The reference 10 in FIG. 1 represents a metallic cylindrical shell of a crusher with an internal coating forming a shield 12 for protecting the shell 10. This shield consists of shielding plates 14 as well as lifting elements 16 fixed to using appropriate bolts 18 on the ferrule. In the example shown, the armor plates 14 are not fixed directly to the shell 10 but are held in place by means of the attachments of the neighboring lifting elements 16.

La virole 10 est conçue pour être entraînée en rotation autour de son axe longitudinal dans le sens de la flèche A. Durant cette rotation, la fonction des éléments de relevage 16 dont l'épaisseur radiale est supérieure à celle des plaques de blindage 14 est d'entraîner la charge broyante et la matière à broyer non représentée. Étant donné que le broyeur n'est rempli que partiellement, généralement de l'ordre de 30%, la charge broyante et la matière à broyer s'accumulent, lors de la rotation du broyeur, essentiellement dans le quatrième quart trigonométrique du broyeur vu dans le sens axial de la Figure 1. Par suite de l'enroulement de cette masse autour de soi et du glissement relatif entre les différentes couches, la matière est broyée progressivement par la charge broyante au fur et à mesure de sa progression depuis l'entrée jusqu'à la sortie du broyeur.The ferrule 10 is designed to be rotated about its longitudinal axis in the direction of the arrow A. During this rotation, the function of the lifting elements 16 whose radial thickness is greater than that of the armor plates 14 is d '' drive the grinding charge and the material to be ground not shown. Since the mill is only partially filled, generally on the order of 30%, the grinding charge and the material to be ground accumulate, during the rotation of the mill, essentially in the fourth trigonometric quarter of the mill seen in the axial direction of Figure 1. Following the winding of this mass around oneself and the relative sliding between the different layers, the material is crushed progressively by the crushing charge as it progresses from the entry up to the mill outlet.

Les éléments de relevage 16 sont des blocs parallélépipédiques en élastomère, par exemple en caoutchouc, fixés en rangées longitudinales sur la paroi de la virole 10. Le côté radial 20 de chaque élément de relevage 16 dans la zone d'attaque de la charge broyante, vue dans le sens de rotation A, est moins profond que le côté radial opposé 22 si bien que la face 24 exposée à la charge et reliant les côtés 20 et 22 est oblique par rapport à la virole. Cette face 24 peut être droite ou légèrement bombée comme représenté sur la Figure 1.The lifting elements 16 are parallelepipedal blocks of elastomer, for example rubber, fixed in longitudinal rows on the wall of the shell 10. The radial side 20 of each lifting element 16 in the attack zone of the grinding load, seen in the direction of rotation A, is shallower than the opposite radial side 22 so that the face 24 exposed to the load and connecting the sides 20 and 22 is oblique with respect to the shell. This face 24 can be straight or slightly curved as shown in FIG. 1.

Conformément à la présente invention, la face 24 de chaque élément de relevage 16 comporte une série d'alvéoles 26. Celles-ci peuvent être réparties de façon régulière ou de façon aléatoire sur toute la longueur des éléments de relevage, l'essentiel étant que les engins broyants puissent s'y incruster lors de l'opération du broyeur afin d'améliorer la résistance des éléments de relevage 16 à l'usure.According to the present invention, the face 24 of each lifting element 16 comprises a series of cells 26. These can be distributed in a regular or random manner over the entire length of the lifting elements, the main thing being that the grinding machines can become embedded therein during the operation of the crusher in order to improve the resistance of the lifting elements 16 to wear.

La taille des éléments de relevage 16 est variable suivant les dimensions du broyeur. Dans un broyeur ayant, par exemple, les données suivantes :

  • longueur : 12 mètres,
  • diamètre : 2,2 mètres,
  • vitesse : 19,8 tour/minute,
  • coefficient de remplissage : 28%,
  • engins broyants : 100 à 600 grammes.
The size of the lifting elements 16 is variable depending on the dimensions of the mill. In a mill having, for example, the following data:
  • length: 12 meters,
  • diameter: 2.2 meters,
  • speed: 19.8 rpm,
  • filling coefficient: 28%,
  • grinding machines: 100 to 600 grams.

On a prévu des releveurs avec les dimensions suivantes :

  • longueur : 700 mm,
  • largeur : 100 mm,
  • épaisseur (hauteur maximale du côté 22) : 115 mm.
We have provided lifters with the following dimensions:
  • length: 700 mm,
  • width: 100 mm,
  • thickness (maximum height on side 22): 115 mm.

Les dimensions des éléments de relevage sont généralement plus élevées si le coefficient de remplissage du broyeur est plus grand ou si le broyeur tourne plus lentement.The dimensions of the lifting elements are generally larger if the filling factor of the mill is greater or if the mill rotates more slowly.

Les plaques de blindage 14 peuvent être en élastomère, soit du type alvéolaire à incrustation, soit avec une rugosité de surface.The armor plates 14 can be made of elastomer, either of the cellular type with inlay, or with a surface roughness.

Selon un autre aspect de l'invention, les releveurs sont arrangés suivant une disposition particulière contribuant à une plus grande efficacité du broyage. En effet, comme le montre la Figure 2, les éléments de relevage sont disposés en rangées longitudinales a qui alternent avec des rangées longitudinales b de plaques de blindage.According to another aspect of the invention, the lifters are arranged in a particular arrangement contributing to greater grinding efficiency. Indeed, as shown in Figure 2, the lifting elements are arranged in longitudinal rows a which alternate with longitudinal rows b of armor plates.

Par ailleurs, chaque rangée a d'éléments de relevage comporte, selon un mode de réalisation préférée, une série d'éléments droits 16a, c'est-à-dire parallèles à la génératrice du broyeur et une série d'éléments 16 b inclinés par rapport à la génératrice du broyeur. La disposition et l'arrangement des éléments droits 16a et des éléments inclinés 16b est modifiable sur la longueur du broyeur suivant les conditions de marche du broyeur, notamment en ce qui concerne la vitesse de rotation, le coefficient de remplissage et le diamètre du broyeur.Furthermore, each row a of lifting elements comprises, according to a preferred embodiment, a series of straight elements 16a, that is to say parallel to the generator of the mill and a series of inclined elements 16b relative to the generator of the mill. The arrangement and arrangement of the straight elements 16a and of the inclined elements 16b can be modified over the length of the mill according to the operating conditions of the mill, in particular as regards the speed of rotation, the filling coefficient and the diameter of the mill.

Dans l'exemple représenté, chaque rangée a d'éléments de relevage comporte une succession alternée d'éléments droits et d'éléments inclinés. Il est préférable de prévoir, dans la zone d'entrée du broyeur, non représenté sur la Figure mais se trouvant du côté gauche de celle-ci, seulement des éléments droits.In the example shown, each row has lifting elements comprises an alternating succession of straight elements and inclined elements. It is preferable to provide, in the entrance area of the grinder, not shown in the Figure but located on the left side thereof, only straight elements.

Il s'est avéré que l'alternance d'éléments droits et d'éléments inclinés a une influence favorable sur le classement des engins broyants en refoulant les plus gros vers la zone d'entrée et les plus petits vers la zone de sortie du broyeur.It has been found that the alternation of straight elements and inclined elements has a favorable influence on the classification of grinding machines by pushing the largest towards the entry zone and the smallest towards the exit zone of the crusher .

Dans l'exemple de la Figure 2, les éléments de relevage 16b sont inclinés dans la direction de la sortie du broyeur, qui se trouve du côté droit de la Figure. Toutefois, aussi bien le sens que l'angle d'inclinaison des éléments de relevage peuvent être modifiés en fonction de la nature et de la forme des engins broyants afin d'obtenir le meilleur effet de classement.In the example of Figure 2, the lifting elements 16b are inclined in the direction of the outlet of the mill, which is on the right side of the Figure. However, both the direction and the angle of inclination of the lifting elements can be modified according to the nature and shape of the grinding machines in order to obtain the best classification effect.

Comme le montre la Figure 3, les éléments de relevage droits 16a et les éléments de relevage inclinés 16b n'ont pas la même épaisseur. Dans l'exemple représenté, les éléments inclinés 16b sont plus épais que les éléments droits 16a, mais le contraire est également possible. Le but de cette conception est de provoquer, lors de la rotation du broyeur, dans des plans diamétraux, des cisaillements entre différentes couches de la charge broyante et de la matière à broyer.As shown in Figure 3, the straight lifting elements 16a and the inclined lifting elements 16b do not have the same thickness. In the example shown, the inclined elements 16b are thicker than the straight elements 16a, but the opposite is also possible. The purpose of this design is to cause, during the rotation of the mill, in diametrical planes, shearing between different layers of the grinding load and the material to be ground.

Il est possible que, abstraction faite des différences d'épaisseur entre les éléments de relevage et les plaques de blindage, le niveau du blindage soit uniforme depuis l'entrée jusqu'à la sortie du broyeur. Il est toutefois également possible que le niveau du blindage soit, à la sortie, légèrement plus élevé qu'à l'entrée de sorte que la section du broyeur soit légèrement convergente vers la sortie.It is possible that, apart from the differences in thickness between the lifting elements and the shielding plates, the level of the shielding is uniform from the inlet to the outlet of the mill. However, it is also possible that the level of the shielding is slightly higher at the outlet than at the inlet so that the section of the mill is slightly convergent towards the outlet.

Claims (10)

Élément de relevage pour broyeur rotatif constitué d'un bloc parallélépipédique en élastomère conçu pour être fixé sur la paroi intérieure d'un broyeur rotatif contenant des engins broyants et pour faire partie du blindage de celui-ci, caractérisé en ce que, au moins une partie de sa face (24) exposée aux engins broyants comporte des alvéoles (26) pour permettre aux engins broyants de s'y incruster.Lifting element for a rotary mill consisting of a parallelepipedal block of elastomer designed to be fixed to the inner wall of a rotary mill containing grinding machines and to form part of the shielding thereof, characterized in that, at least one part of its face (24) exposed to the grinding machines has cells (26) to allow the grinding machines to be embedded therein. Élément de relevage selon la revendication 1, caractérisé en ce que la face (24) comportant lesdites alvéoles (26) est inclinée par rapport à la paroi du broyeur, l'épaisseur du côté de la zone d'attaque, vue dans le sens de rotation du broyeur, étant plus faible que du côté opposé (22).Lifting element according to claim 1, characterized in that the face (24) comprising said cells (26) is inclined relative to the wall of the mill, the thickness of the side of the attack zone, viewed in the direction of rotation of the mill, being lower than on the opposite side (22). Élément de relevage selon la revendication 2, caractérisé en ce que ladite face (24) est bombée vue en coupe diamétrale du broyeur.Lifting element according to claim 2, characterized in that said face (24) is curved viewed in diametrical section of the mill. Broyeur rotatif comprenant une virole cylindrique (10) avec un blindage intérieur (12) constitué de releveurs (16) et de plaques de blindage (14), caractérisé en ce que les éléments de relevage sont des éléments selon l'une quelconque des revendications 1 à 3.Rotary crusher comprising a cylindrical shell (10) with an inner shield (12) consisting of levers (16) and shielding plates (14), characterized in that the lifting elements are elements according to any one of claims 1 to 3. Broyeur selon la revendication 4, caractérisé en ce que les éléments de relevage (16) et les plaques de blindage (14) sont disposés en rangées longitudinales alternantes (a, b).Crusher according to claim 4, characterized in that the lifting elements (16) and the shielding plates (14) are arranged in alternating longitudinal rows (a, b). Broyeur selon la revendication 5, caractérisé en ce que chaque rangée a d'éléments de relevage comporte, sur au moins une partie de la longueur de la virole, des éléments droits (16a), parallèles à la génératrice de la virole et des éléments (16b) inclinés par rapport à la génératrice de la virole.Crusher according to claim 5, characterized in that each row has lifting elements comprises, over at least part of the length of the ferrule, straight elements (16a), parallel to the generator of the ferrule and elements ( 16b) inclined relative to the generator of the ferrule. Broyeur selon la revendication 6, caractérisé en ce que chaque élément droit (16a) est entouré de deux éléments inclinés (16b) et vice-versa.Crusher according to claim 6, characterized in that each straight element (16a) is surrounded by two inclined elements (16b) and vice versa. Broyeur selon l'une quelconque des revendications 6 ou 7, caractérisé en ce que les éléments droits (16a) et les éléments inclinés (16b) ont des épaisseurs radiales différentes.Crusher according to any one of claims 6 or 7, characterized in that the straight elements (16a) and the inclined elements (16b) have different radial thicknesses. Broyeur selon l'une quelconque des revendications 4 à 8, caractérisé en ce que l'épaisseur du blindage (12) est constante sur toute la longueur du broyeur.Crusher according to any one of Claims 4 to 8, characterized in that the thickness of the shield (12) is constant over the entire length of the crusher. Broyeur selon l'une quelconque des revendications 4 à 7, caractérisé en ce que l'épaisseur du blindage (12) est plus élevée à la sortie qu'à l'entrée.Crusher according to any one of claims 4 to 7, characterized in that the thickness of the shield (12) is greater at the outlet than at the inlet.
EP94114265A 1993-09-17 1994-09-10 Lifter element for tube mill and tube mill provided with such elements Expired - Lifetime EP0645190B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU88409 1993-09-17
LU88409A LU88409A1 (en) 1993-09-17 1993-09-17 Lifting element for rotary crusher and crusher equipped with such elements

Publications (3)

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EP0645190A2 true EP0645190A2 (en) 1995-03-29
EP0645190A3 EP0645190A3 (en) 1995-08-16
EP0645190B1 EP0645190B1 (en) 1999-12-08

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EP (1) EP0645190B1 (en)
AU (1) AU672717B2 (en)
BR (1) BR9403086A (en)
CA (1) CA2132240C (en)
DE (1) DE69421988T2 (en)
LU (1) LU88409A1 (en)
ZA (1) ZA937490B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102847590A (en) * 2012-09-14 2013-01-02 沈阳恒创思源矿业科技开发有限公司 Non-uniform permanent magnetic field ultrahigh-molecular-weight polyethylene magnetic lining plate

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5842654A (en) * 1993-04-23 1998-12-01 Slegten Societe Anonyme Device for fixing a partition for tube mill and method for this purpose
US6082646A (en) * 1999-07-07 2000-07-04 Me International Fastening system for liner assemblies of ore mills
US6651709B1 (en) * 2002-09-11 2003-11-25 Cae Wood Products, G.P. Retractable debarking apparatus
EP1838447B1 (en) * 2005-01-18 2016-11-23 Vulco S.A. Cushioning element for mill liner
US20060169359A1 (en) * 2005-01-28 2006-08-03 Carmanah Design And Manufacturing Inc. Debarking apparatus with adjustable rate of debarking
US7354266B2 (en) * 2005-01-31 2008-04-08 Metso Minerals Industries, Inc. Replaceable lump breaker system for a rotary kiln
SE531347C2 (en) * 2007-07-10 2009-03-03 Metso Minerals Wear Prot Ab Wear lining elements and device for attaching such
PE20141419A1 (en) * 2010-12-14 2014-10-15 Weir Minerals Australia Ltd LIFT BAR WITH ATTACHMENT POINT FOR LIFTING
CA2764262C (en) 2011-01-13 2019-03-05 Polycorp Ltd. Mill liner assembly
AU2013100347A4 (en) * 2012-11-21 2013-05-02 HAIG, Ian E. A guard
US9475057B2 (en) * 2013-01-24 2016-10-25 Cabot Corporation Liner elements with improved wear-life for grinding operations
PE20160642A1 (en) * 2013-10-17 2016-07-21 Tega Ind Ltd LIFT BAR WITH DRAWING
US20150224509A1 (en) * 2014-02-12 2015-08-13 Kennametal Inc. Grain mill liner assembly
CA2967850A1 (en) 2016-05-19 2017-11-19 Polycorp Ltd. Liner system for a mill shell
WO2018138405A1 (en) * 2017-01-26 2018-08-02 Outotec (Finland) Oy Improvements in stirred bead grinding mills
CL2017002894A1 (en) * 2017-11-14 2019-06-14 Asesorias Y Servicios Innovaxxion Spa Multi-layer lifter for semi-autogenous or sag mills.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1921672A (en) * 1931-12-21 1933-08-08 Goodrich Co B F Ball mill lining
SU613545A1 (en) * 1975-06-12 1979-08-25 Всесоюзный Ордена Трудового Красного Знамени Научно-Исследовательский Институт Механической Обработки Полезных Ископаемых "Механобр" Self-communition mill drum lining
GB1593025A (en) * 1977-05-16 1981-07-15 Trelleborg Ab Mill linings
SU1079286A1 (en) * 1982-12-03 1984-03-15 Акмянское Ордена Трудового Красного Знамени Цементно-Шиферное Производственное Объединение Им.50-Летия Ссср "Акмянцементас" Taper-stepped armour lining of tube mill
SU1217468A1 (en) * 1984-10-08 1986-03-15 Днепропетровский Ордена Ленина Металлургический Завод Им.Петровского Aromour lining for tumbling barrel
FR2615412A1 (en) * 1987-05-22 1988-11-25 Magotteaux Sa Composite wearing component for horizontal grinders (shredders)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1539237A (en) * 1924-02-11 1925-05-26 John Herman Screening ball mill
US2809789A (en) * 1953-12-29 1957-10-15 Allis Chalmers Mfg Co Ball mill liner
US2876957A (en) * 1954-10-23 1959-03-10 Henricot Usines Emile Sa Ribbed frusto-conical lining for tube mills
US2949247A (en) * 1956-11-20 1960-08-16 Bofors Ab Liners for ball and tube mills
US4289279A (en) * 1977-02-25 1981-09-15 Trelleborg Ab Mill lining
SE421868B (en) * 1979-07-13 1982-02-08 Socared Sa FOR WRAPPING EXPOSED WALL THAT WHEN USING IT IS POSED FOR PACKING OF PIECE OR PARTICULAR GOODS CONTAINING MAGNETIC PARTICLES
SE434805B (en) * 1980-06-10 1984-08-20 Skega Ab WEARING LINING OF RUBBER FOR ROTATING DRUM
AU654608B2 (en) * 1992-01-10 1994-11-10 Envirotech Pumpsystems, Inc. Grinding mill, lining and associated method of manufacture
SE468627B (en) * 1992-02-14 1993-02-22 Harald Kenneth Lejonklou WEAR ELEMENT

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1921672A (en) * 1931-12-21 1933-08-08 Goodrich Co B F Ball mill lining
SU613545A1 (en) * 1975-06-12 1979-08-25 Всесоюзный Ордена Трудового Красного Знамени Научно-Исследовательский Институт Механической Обработки Полезных Ископаемых "Механобр" Self-communition mill drum lining
GB1593025A (en) * 1977-05-16 1981-07-15 Trelleborg Ab Mill linings
SU1079286A1 (en) * 1982-12-03 1984-03-15 Акмянское Ордена Трудового Красного Знамени Цементно-Шиферное Производственное Объединение Им.50-Летия Ссср "Акмянцементас" Taper-stepped armour lining of tube mill
SU1217468A1 (en) * 1984-10-08 1986-03-15 Днепропетровский Ордена Ленина Металлургический Завод Им.Петровского Aromour lining for tumbling barrel
FR2615412A1 (en) * 1987-05-22 1988-11-25 Magotteaux Sa Composite wearing component for horizontal grinders (shredders)

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
SOVIET INVENTIONS ILLUSTRATED Section PQ, Week 8002 20 Février 1980 Derwent Publications Ltd., London, GB; Class P41, AN 3402c & SU-A-613 545 (MEKHANOBR MINERALS) , 25 Août 1979 *
SOVIET INVENTIONS ILLUSTRATED Section PQ, Week 8508 3 Avril 1985 Derwent Publications Ltd., London, GB; Class P41, AN 85-048419 & SU-A-1 079 286 (AKMYANTSEMENTAS) , 15 Mars 1984 *
SOVIET INVENTIONS ILLUSTRATED Section PQ, Week 8645 20 Novembre 1986 Derwent Publications Ltd., London, GB; Class P41, AN 86-296961 & SU-A-1 217 468 (DNEPR METAL) , 15 Mars 1986 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102847590A (en) * 2012-09-14 2013-01-02 沈阳恒创思源矿业科技开发有限公司 Non-uniform permanent magnetic field ultrahigh-molecular-weight polyethylene magnetic lining plate

Also Published As

Publication number Publication date
EP0645190A3 (en) 1995-08-16
AU672717B2 (en) 1996-10-10
EP0645190B1 (en) 1999-12-08
DE69421988D1 (en) 2000-01-13
LU88409A1 (en) 1994-04-01
BR9403086A (en) 1995-05-02
US5516051A (en) 1996-05-14
CA2132240A1 (en) 1995-03-18
CA2132240C (en) 2004-11-23
ZA937490B (en) 1994-04-25
DE69421988T2 (en) 2000-04-20
AU7163894A (en) 1995-03-30

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