EP3204163A1 - Mill for crushing a bed of materials by compression - Google Patents

Mill for crushing a bed of materials by compression

Info

Publication number
EP3204163A1
EP3204163A1 EP15797118.5A EP15797118A EP3204163A1 EP 3204163 A1 EP3204163 A1 EP 3204163A1 EP 15797118 A EP15797118 A EP 15797118A EP 3204163 A1 EP3204163 A1 EP 3204163A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
elements
downstream
mill according
roll
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP15797118.5A
Other languages
German (de)
French (fr)
Other versions
EP3204163B1 (en
Inventor
Eric EDET
Alain Cordonnier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fives FCB SA
Original Assignee
Fives FCB SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fives FCB SA filed Critical Fives FCB SA
Publication of EP3204163A1 publication Critical patent/EP3204163A1/en
Application granted granted Critical
Publication of EP3204163B1 publication Critical patent/EP3204163B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/003—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
    • B02C15/06—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
    • B02C2210/00—Codes relating to different types of disintegrating devices
    • B02C2210/02—Features for generally used wear parts on beaters, knives, rollers, anvils, linings and the like

Definitions

  • the invention relates to a compression mill of material bed, usually called horizontal roller mill, and finds a particular application for the grinding of mineral materials, without limitation, for the manufacture of cement clinker.
  • the documents EP 0 486 371 and EP 0 934 120 describe such a type of mill which comprises a cylinder rotating along its horizontal axis, and whose inner wall, usually coated with a layer of wear material, forms a rolling track.
  • a grinding roll of rotation axis substantially parallel to the axis of the cylinder, and applied under high pressure on the raceway.
  • the material to be milled is fed into the cylinder at one of its ends and emerges at the other end.
  • the driving speed of the roll is such that the material is centrifuged against the track, held against the track during the rotation of the roll, the material passing several times between the track and the grinding roll. . It is known to control the number of passages through mechanical devices.
  • Such devices are described in EP 0 934 120, and may include a wiper assembly (s) / deflector plate (s).
  • the scraper is placed inside the cylinder, in the upper descending part, and arranged to detach the material from the raceway.
  • One or more deflector plates are arranged to intercept the material detached by the scraper and deflect it in the direction of the mill outlet.
  • the material to be milled which is fed into the mill has a coarse grain size, with a maximum grain size of up to typically 100 mm. Due to the operation of the handling systems, the flow of material is subject to fluctuations, and the particle size distribution is also subject to fluctuations. This induces variations in the constitution and thickness of the material bed and the variations in forces exerted by the grinding roll which result in vibrations of the machine. These vibrations create mechanical stresses that contribute to the reduction of the service life of the constituents of the machine, or even the neighboring elements of the grinding machine. In such a type of mill the material advances from one end of the machine to the other, at the same time that it undergoes successive grinding actions.
  • the particle size of the material is coarser in the part of the mill near the inlet end than in the part of the mill near the end of the outlet.
  • the material bed therefore has a behavior that varies throughout the mill, and the grinding roll is biased differently at the various points of its length.
  • the thinnest material near the outlet end tends to flow past the grinding roll, escaping from the grinding roll right-of-way. This phenomenon produces a bed of thin materials and impairs the proper centrifugation of the material. This imbalances the machine, decreases the efficiency, increases sensitivity to vibrations and leads to asymmetrical wear.
  • the escape phenomenon may also exist near the upstream end of the roller, cause a reflux of material, and be the cause of other phenomena instability.
  • the object of the present invention is to overcome the aforementioned drawbacks by providing a grinder to ensure a sufficient thickness of the material bed on the side where the materials are the finest.
  • Another object of the present invention is to provide such a mill whose manufacture is not complexif ⁇ ée compared to the prior art.
  • the invention relates to a material bed compression crusher comprising: - a horizontal axis cylinder whose inner wall is provided with a rolling track for a grinding roll disposed inside said cylinder,
  • the rolling track is followed by a downstream flange, intended to oppose the flow of the material, located downstream of said grinding roller in the direction of movement of the material, said downstream flange comprising several elements arranged according to an inner perimeter of said cylinder.
  • the set of elements forming the downstream rim occupies at least 75% of the internal perimeter of the cylinder
  • the height of the elements forming the downstream flange and protruding from the raceway is between 1% and 5% of the diameter of the grinding roller;
  • the distance between the downstream end of the grinding roll and the downstream flange is between 1.5% and 7.5% of the diameter of the grinding roll;
  • the running track is preceded by an upstream rim, opposing the flow of the material, located upstream of said grinding roller in the direction of movement of the material, said rim comprising a plurality of elements arranged according to an inner perimeter said cylinder;
  • the height of the elements forming the upstream flange and protruding from the raceway is between 100% and 150% of the height of the elements forming the downstream flange protruding from said raceway;
  • the distance between the upstream end of the grinding roll and the upstream flange is between 1.5% and 7.5% of the diameter of the grinding roll;
  • the runway is devoid of an upstream flange opposing the flow of the material;
  • the downstream rim on the inner perimeter of the cylinder is a discontinuous rim, said elements being distributed on the inner perimeter, mutually spaced, creating a plurality of passages on the inner perimeter;
  • the upstream rim on the inside perimeter of the cylinder is a discontinuous rim, said elements being distributed on the inner perimeter, mutually spaced, creating a plurality of passages on the inner perimeter;
  • said means for controlling the movement of the material so that it travels only a fraction of the length of the cylinder at each turn and passes several times between the roll and the roll before reaching the exit comprise at least one scraper placed at the inside of the cylinder, in the upper descending part, capable of detaching 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 scraper and deflect it towards the from the mill outlet.
  • the raceway comprises a layer of hard material, of wear, attached to the inner wall of said cylinder, formed by a plurality of wear plates and in which the elements forming the downstream edge are elements reported and secured respectively wear plates.
  • the elements forming the downstream flange are each constituted by the hard material of the wear plates, said elements being respectively integral with said wear plates.
  • the raceway is constituted by a layer of hard material, of wear, attached to the inner wall of said cylinder, formed by a plurality of wear plates and in which the elements forming the upstream edge are inserts and integral respectively wear plates.
  • the elements forming the upstream flange each consist of the hard material of the wear plates, said elements being respectively integral with said wear plates.
  • - Figure 1 illustrates the principle of operation of a horizontal mill by compression of the material bed (downstream flange not shown).
  • - Figure 2 is a vertical sectional view along the axis of the cylinder, according to the invention according to one embodiment, and having on the output side of the materials, along an inner perimeter of the cylinder, elements constituting obstacles slowing down the evacuation of matter.
  • FIG. 3 is a view of the device of Figure 2, in a sectional plane perpendicular to the axis of the cylinder.
  • FIG. 4 is a detailed view of a downstream flange element, and its positioning relative to the raceway, as well as with respect to the downstream end of the grinding roller.
  • FIG. 5 illustrates a particular embodiment of the invention, presenting in addition to the downstream flange, intended to slow the escape of the materials at the downstream end of the grinding roller, an upstream flange intended to brake the exhaust. materials at the upstream end of the grinding roll.
  • FIG. 6 illustrates a wear plate forming part of the protective layer of the cylinder and intended to equip the cylinder downstream of the raceway, an element of the downstream flange and said wear plate being contiguous by the downstream end of said plate.
  • the invention relates to a crusher 1 by compression of a bed of materials comprising:
  • a cylinder 2 having a horizontal axis A whose inner wall is provided with a rolling track for a grinding roll 3 disposed inside said cylinder,
  • the cylinder 2 with horizontal axis A may be a ferrule, in particular metal, resting on bearings (not illustrated) in particular hydrostatic ensuring rotation guidance of the cylinder about its horizontal axis A.
  • the raceway may be formed by a layer 6 of hard material, wear, reported on the inner wall of said cylinder, formed by a plurality of wear plates 61.
  • Said means for rotating the cylinder about its axis A may comprise a geared motor whose axis the output has a gear coupled to a ring gear, secured to the outer wall of the cylinder 2. According to the invention, these means drive the cylinder 2 at a speed ensuring centrifugation of the material. In other words, the speed of the cylinder 2 is such that the material is, under the effect of the centrifugal force, held against the raceway during the rotation of the cylinder.
  • Said means for applying the grinding roll against the tread may comprise arms guiding the ends of the grinding roll 3 by rolling means, as well as jacks or springs able to exert a force on the ends of the roll of grinding 3, and connected to said arms.
  • said means for applying the grinding roll 3 against the tread are such that the grinding roll exerts on the material bed a mean pressure P of between 10 MPa and 40 MPa.
  • the grinding roll is of axis substantially parallel to that of the axis of the cylinder.
  • the feed mill 1 is performed at the inlet 7 at one end of the cylinder 2, the outlet 8 of the ground material being located at the other end of the cylinder. Between the inlet 7 and the outlet 8, the material passes several times between the raceway and the grinding roll 3, running a fraction of the length of the cylinder at each turn.
  • the advance of the materials in the cylinder is thus regulated by means which can comprise a device intended to ensure the advance of the material, from one end to the other of the cylinder 2, and such as in particular those described in the document EP 0 486 371 or EP 0 934 120.
  • a device comprises the less a scraper (or knife) placed inside the cylinder, in the upper descending part, and one or more deflector plates, arranged under the scraper.
  • the scraper makes it possible to detach the material from the raceway, which otherwise would be held against the track under the effect of the centrifugal force.
  • the baffle (s) below the wiper intercepts the loose material from the last and deflects it in the direction of the mill outlet.
  • the raceway is followed by a downstream rim, intended to oppose the flow of the material, located downstream of said grinding roller in the direction of movement of the material.
  • a downstream flange is illustrated, by way of non-limiting example, in FIGS. 2, 3 and 4.
  • the function of this downstream flange is to slow the escape of the material to level of the downstream end of the grinding roll 3, thus avoiding that the bed of materials at this end is too thin, and as shown in detail in Figure 4.
  • this downstream flange comprises a plurality of elements 4 arranged along an inside perimeter of said cylinder 2.
  • the set of elements forming the downstream flange occupies, according to one embodiment, at least 75% of the inside perimeter of the cylinder 2.
  • These elements 4 may be elements in an arc of a circle, in particular of constant section along the length, and of radius of curvature corresponding in particular substantially to the cylinder (or to the raceway).
  • the downstream rim on the inside perimeter of the cylinder is a discontinuous rim.
  • Said elements 4 can be distributed on an inner perimeter, mutually spaced, creating a plurality of passages on the inner perimeter. These different passages, constituted by the inter-spaces between elements 4, are distributed over the perimeter of the cylinder 2, and preferably regularly.
  • the evacuation of the material is obtained, either by the overflow effect of the material above the elements 4 of the downstream rim, or through the passages between elements 4 (in the case of a discontinuous rim). ), or by the combination of the two effects.
  • the height h of the elements 4 forming the downstream flange and protruding from the raceway is between 1% and 5% of the diameter D of the grinding roller 3.
  • the height h is illustrated in FIG. it is the dimension of the element 4, from the surface of the raceway, and in a radial direction to the cylinder.
  • the distance d between the downstream end of the grinding roll 3 and the downstream flange is between 1.5% and 7.5% of the diameter D of the grinding roll 3.
  • the distance d is illustrated in FIG. Figure 4: it is the dimension, in the axial direction of the cylinder 2, between the downstream end of the grinding roller 3, and the downstream flange.
  • the length L of the grinding roll 3 may be shorter than the running track.
  • the mill according to the invention is thus advantageously equipped with a downstream flange for braking the flow of the material, in the area of the mill where the material is the thinnest, at the downstream end of the roll 3, in particular at the outlet 8 of the mill.
  • a downstream flange for braking the flow of the material, in the area of the mill where the material is the thinnest, at the downstream end of the roll 3, in particular at the outlet 8 of the mill.
  • Such a rim, at the other end of the raceway, that is to say upstream of the grinding roller is optional.
  • the mill may be devoid of such a rim, upstream of the grinding roller 3.
  • Such an upstream edge may however be of interest especially in the case where the input material of the mill has a large proportion of fine particles, and so as to limit the phenomena of escape and reflux at the upstream end of the grinding roll 3.
  • the rolling track may be preceded by an upstream rim, opposing the flow of the material, in the direction of reflux.
  • the function of this upstream flange is to slow down the escape of the material at the upstream end of the grinding roll 3, thus avoiding that the bed of materials at this end is too thin, and as shown in detail in FIG. FIG. 5.
  • This flange may comprise several elements 41 arranged along an inside perimeter of said cylinder 2.
  • the set of elements forming the upstream edge occupies, according to one embodiment, at least 75% of the internal perimeter of the cylinder 2.
  • These elements 4 may take the form of elements in a circular arc and corresponding radius of curvature notably substantially to the cylinder or the raceway.
  • the upstream edge on the inner perimeter of the cylinder is a discontinuous rim.
  • Said elements 41 are then distributed on an inner perimeter, mutually spaced, creating a plurality of passages on the inner perimeter.
  • These different passages, constituted by the inter-spaces between elements 4, are distributed on the perimeter of the cylinder 2, and preferably regularly on the perimeter of the cylinder.
  • the height h 'of the elements 41 forming the upstream flange and protruding from the raceway is greater than the height h of the elements 4 forming the downstream flange protruding from said raceway.
  • the height h 'of the elements 41 may be between 100% and 150% of the height h of the elements 4 forming the downstream rim.
  • the distance between the upstream end of the grinding roll 3 and the upstream flange may be between 1.5% and 7.5% of the diameter D of the grinding roll.
  • the elements 4 forming the downstream flange may be inserts and secured respectively plates of 61.
  • a wear plate is illustrated by way of non-limiting example in FIG. 6.
  • Each plate comprises a concave inner surface, intended to constitute part of the rolling track, a convex outer surface intended to be fixed and applied to the inner wall of the cylinder and including assembly edges, in particular four in number.
  • Each element 4 in particular of arcuate shape is of smaller dimension than said plate and is bonded to said plate by any suitable means, such as glue, welding, mechanical fixing.
  • Element 4 may be bonded to the convex outer surface of the plate at the downstream end of said wear plate.
  • the elements 4 forming the downstream flange each consist of the hard material of the wear plates 61, said elements 4 being respectively integral with said wear plates 61.
  • the elements 4 and the corresponding wear plates 61 form, in pairs, respectively mechanical assemblies which will make it possible, simultaneously, to make the wear layer 6 and the downstream flange, during the assembly of the plates 61 .

Abstract

Mill (1) for crushing a bed of materials by compression and comprising: a horizontal-axis cylinder (2) the interior wall of which is provided with a runway track for a crushing roller (3) placed inside said cylinder, means for driving the cylinder in rotation about its axis at a speed that spins the material outward, said crushing roller (3), means for pressing said crushing roller against the runway track of said cylinder, an inlet (7) for supplying material for crushing and situated at one of the ends of the cylinder and an outlet (8) for crushed material at the other end of said cylinder, means for controlling the movement of the material so that it travels over only a fraction of the length of the cylinder in each revolution and passes between the cylinder and the roller several times before reaching the outlet. According to the invention, the runway track is followed by a downstream lip intended to oppose the flow of the material, situated downstream of said crushing roller in the direction in which the material travels, said downstream lip comprising several elements (4) arranged along an interior perimeter of said cylinder (2).

Description

BROYEUR PAR COMPRESSION DE LIT DE MATIERES  COMPRESSOR BINDER OF BED OF MATERIALS
L'invention concerne un broyeur par compression de lit de matières, usuellement dénommé broyeur horizontal à galet, et trouve une application particulière pour le broyage de matières minérales, non limitativement, pour la fabrication de clinker de ciment. The invention relates to a compression mill of material bed, usually called horizontal roller mill, and finds a particular application for the grinding of mineral materials, without limitation, for the manufacture of cement clinker.
Les documents EP 0 486 371 et EP 0 934 120 décrivent un tel type de broyeur qui comprend un cylindre tournant suivant son axe horizontal, et dont la paroi intérieure, usuellement revêtue d'une couche de matériau d'usure, forme une piste de roulement pour un rouleau de broyage, d'axe de rotation sensiblement parallèle à l'axe du cylindre, et appliqué sous forte pression sur la piste de roulement. La matière à broyer est alimentée dans le cylindre, à l'une de ses extrémités, et ressort à l'autre extrémité. Dans un tel broyeur, la vitesse d'entraînement du cylindre est telle que la matière est centrifugée contre la piste de roulement, maintenue contre la piste pendant la rotation du cylindre, la matière passant plusieurs fois entre la piste de roulement et le rouleau de broyage. Il est connu de contrôler le nombre de passages grâce à des dispositifs mécaniques. De tels dispositifs sont décrits dans le document EP 0 934 120, et peuvent comprendre un ensemble racleur(s)/plaque(s) déflectrice(s). Le racleur est placé à l'intérieur du cylindre, dans la partie supérieure descendante, et agencé pour détacher la matière de la piste de roulement. Une ou plusieurs plaques déflectrices sont disposées de façon à intercepter la matière détachée par le racleur et la dévier dans la direction de la sortie du broyeur. The documents EP 0 486 371 and EP 0 934 120 describe such a type of mill which comprises a cylinder rotating along its horizontal axis, and whose inner wall, usually coated with a layer of wear material, forms a rolling track. for a grinding roll, of rotation axis substantially parallel to the axis of the cylinder, and applied under high pressure on the raceway. The material to be milled is fed into the cylinder at one of its ends and emerges at the other end. In such a mill, the driving speed of the roll is such that the material is centrifuged against the track, held against the track during the rotation of the roll, the material passing several times between the track and the grinding roll. . It is known to control the number of passages through mechanical devices. Such devices are described in EP 0 934 120, and may include a wiper assembly (s) / deflector plate (s). The scraper is placed inside the cylinder, in the upper descending part, and arranged to detach the material from the raceway. One or more deflector plates are arranged to intercept the material detached by the scraper and deflect it in the direction of the mill outlet.
La matière à broyer qui est alimentée dans le broyeur possède une granulométrie grossière, avec une taille maximale de grain pouvant atteindre typiquement 100 mm. Par l'effet du fonctionnement des systèmes de manutention, le débit de matières est sujet à des fluctuations, et la répartition granulométrique est également sujette à des fluctuations. Ceci induit des variations de la constitution et de l'épaisseur du lit de matières et des variations de forces exercées par le rouleau de broyage qui se traduisent par des vibrations de la machine. Ces vibrations créent des sollicitations mécaniques qui participent à la réduction de la durée de vie des constituants de la machine, voire des éléments voisins de l'atelier de broyage. Dans un tel type de broyeur la matière avance d'une extrémité de la machine à l'autre, en même temps qu'elle subit des actions de broyage successives. Ainsi la granulométrie de la matière est plus grossière dans la partie du broyeur située près de l'extrémité d'entrée, que dans la partie du broyeur située près de l'extrémité de la sortie. Le lit de matières a donc un comportement qui varie tout au long du broyeur, et le rouleau de broyage est sollicité de façon différente en les divers points de sa longueur. En particulier, la matière la plus fine située près de l'extrémité de sortie a tendance à s'écouler devant le rouleau de broyage, s'échappant de l'emprise du rouleau de broyage. Ce phénomène produit un lit de matières de faible épaisseur et nuit à la bonne centrifugation de la matière. Ceci déséquilibre la machine, en diminue l'efficacité, augmente la sensibilité aux vibrations et conduit à des usures dissymétriques. The material to be milled which is fed into the mill has a coarse grain size, with a maximum grain size of up to typically 100 mm. Due to the operation of the handling systems, the flow of material is subject to fluctuations, and the particle size distribution is also subject to fluctuations. This induces variations in the constitution and thickness of the material bed and the variations in forces exerted by the grinding roll which result in vibrations of the machine. These vibrations create mechanical stresses that contribute to the reduction of the service life of the constituents of the machine, or even the neighboring elements of the grinding machine. In such a type of mill the material advances from one end of the machine to the other, at the same time that it undergoes successive grinding actions. Thus, the particle size of the material is coarser in the part of the mill near the inlet end than in the part of the mill near the end of the outlet. The material bed therefore has a behavior that varies throughout the mill, and the grinding roll is biased differently at the various points of its length. In particular, the thinnest material near the outlet end tends to flow past the grinding roll, escaping from the grinding roll right-of-way. This phenomenon produces a bed of thin materials and impairs the proper centrifugation of the material. This imbalances the machine, decreases the efficiency, increases sensitivity to vibrations and leads to asymmetrical wear.
Lorsque les matières premières alimentées dans le broyeur contiennent une proportion importante de particules fines, le phénomène d'échappement peut aussi exister à proximité de l'extrémité amont du galet, provoquer un reflux de matière, et être à l'origine d'autres phénomènes d'instabilité. When raw materials fed into the mill contain a large proportion of fine particles, the escape phenomenon may also exist near the upstream end of the roller, cause a reflux of material, and be the cause of other phenomena instability.
Le but de la présente invention est de pallier les inconvénients précités en proposant un broyeur permettant de garantir une épaisseur suffisante du lit de matières du côté où les matières sont les plus fines. The object of the present invention is to overcome the aforementioned drawbacks by providing a grinder to ensure a sufficient thickness of the material bed on the side where the materials are the finest.
Un autre but de la présente invention, au moins selon un mode de réalisation, est de proposer un tel broyeur dont la fabrication n'est pas complexifïée par rapport à l'art antérieur. Another object of the present invention, at least according to one embodiment, is to provide such a mill whose manufacture is not complexifïée compared to the prior art.
D'autres buts et avantages de l'invention apparaîtront au cours de la description qui va suivre qui n'est donnée qu'à titre indicatif et qui n'a pas pour but de la limiter. Other objects and advantages of the invention will become apparent from the following description which is given for information only and which is not intended to limit it.
Aussi l'invention concerne un broyeur par compression de lit de matières comprenant : - un cylindre à axe horizontal dont la paroi intérieure est pourvue d'une piste de roulement pour un rouleau de broyage, disposé intérieur audit cylindre, Also, the invention relates to a material bed compression crusher comprising: - a horizontal axis cylinder whose inner wall is provided with a rolling track for a grinding roll disposed inside said cylinder,
- des moyens pour entraîner en rotation le cylindre autour de son axe à une vitesse assurant la centrifugation de la matière,  means for rotating the cylinder about its axis at a speed ensuring the centrifugation of the material,
- ledit rouleau de broyage, - des moyens pour appliquer ledit rouleau de broyage contre la piste de roulement dudit cylindre, said grinding roller, means for applying said grinding roller against the rolling track of said cylinder,
- une entrée pour l'alimentation de la matière à broyer située à l'une des extrémités du cylindre et une sortie pour la matière broyée à l'autre extrémité dudit cylindre,  an inlet for feeding the material to be ground at one end of the cylinder and an outlet for the ground material at the other end of said cylinder,
- des moyens pour contrôler le déplacement de la matière de sorte qu'elle parcourt seulement une fraction de la longueur du cylindre à chaque tour et passe plusieurs fois entre le cylindre et le rouleau avant d'atteindre la sortie. means for controlling the movement of the material so that it travels only a fraction of the length of the cylinder at each turn and passes several times between the roll and the roll before reaching the exit.
Selon l'invention, la piste de roulement est suivie d'un rebord aval, destiné à s'opposer à l'écoulement de la matière, situé en aval dudit rouleau de broyage selon le sens de déplacement de la matière, ledit rebord aval comprenant plusieurs éléments disposés selon un périmètre intérieur dudit cylindre. According to the invention, the rolling track is followed by a downstream flange, intended to oppose the flow of the material, located downstream of said grinding roller in the direction of movement of the material, said downstream flange comprising several elements arranged according to an inner perimeter of said cylinder.
Selon des caractéristiques optionnelles de l'invention, prises seules ou en combinaison : - l'ensemble des éléments formant le rebord aval occupe au moins 75% du périmètre intérieur du cylindre ; According to optional features of the invention, taken alone or in combination: the set of elements forming the downstream rim occupies at least 75% of the internal perimeter of the cylinder;
- la hauteur des éléments formant le rebord aval et dépassant de la piste de roulement est comprise entre 1% et 5% du diamètre du rouleau de broyage ;  - The height of the elements forming the downstream flange and protruding from the raceway is between 1% and 5% of the diameter of the grinding roller;
- la distance entre l'extrémité aval du rouleau de broyage et le rebord aval est comprise entre 1,5% et 7,5% du diamètre du rouleau de broyage ;  the distance between the downstream end of the grinding roll and the downstream flange is between 1.5% and 7.5% of the diameter of the grinding roll;
- la piste de roulement est précédée d'un rebord amont, s'opposant à l'écoulement de la matière, situé en amont dudit rouleau de broyage selon le sens de déplacement de la matière, ledit rebord comprenant plusieurs éléments disposés selon un périmètre intérieur dudit cylindre ;  - The running track is preceded by an upstream rim, opposing the flow of the material, located upstream of said grinding roller in the direction of movement of the material, said rim comprising a plurality of elements arranged according to an inner perimeter said cylinder;
- l'ensemble des éléments formant le rebord amont occupe au moins 75% du périmètre intérieur du cylindre ; all the elements forming the upstream flange occupy at least 75% of the internal perimeter of the cylinder;
- la hauteur des éléments formant le rebord amont et dépassant de la piste de roulement est comprise entre 100% et 150% de la hauteur des éléments formant le rebord aval, dépassant de ladite piste de roulement ;  - The height of the elements forming the upstream flange and protruding from the raceway is between 100% and 150% of the height of the elements forming the downstream flange protruding from said raceway;
- la distance entre l'extrémité amont du rouleau de broyage et le rebord amont est comprise entre 1,5% et 7,5% du diamètre du rouleau de broyage ; - la piste de roulement est dépourvue d'un rebord amont s'opposant à l'écoulement de la matière ; the distance between the upstream end of the grinding roll and the upstream flange is between 1.5% and 7.5% of the diameter of the grinding roll; - The runway is devoid of an upstream flange opposing the flow of the material;
- le rebord aval sur le périmètre intérieur du cylindre est un rebord discontinu, lesdits éléments étant répartis sur le périmètre intérieur, mutuellement espacés, créant une pluralité de passages sur le périmètre intérieur ;  - The downstream rim on the inner perimeter of the cylinder is a discontinuous rim, said elements being distributed on the inner perimeter, mutually spaced, creating a plurality of passages on the inner perimeter;
- le rebord amont sur le périmètre intérieur du cylindre est un rebord discontinu, lesdits éléments étant répartis sur le périmètre intérieur, mutuellement espacés, créant une pluralité de passages sur le périmètre intérieur ;  the upstream rim on the inside perimeter of the cylinder is a discontinuous rim, said elements being distributed on the inner perimeter, mutually spaced, creating a plurality of passages on the inner perimeter;
- lesdits moyens pour contrôler le déplacement de la matière de sorte qu'elle parcourt seulement une fraction de la longueur du cylindre à chaque tour et passe plusieurs fois entre le cylindre et le rouleau avant d'atteindre la sortie comprennent au moins un racleur placé à l'intérieur du cylindre, dans la partie supérieure descendante, apte à détacher la matière de la piste de roulement et une, ou de préférence plusieurs plaques déflectrices disposées sous le racleur de façon à intercepter la matière détachée par le racleur et la dévier en direction de la sortie du broyeur.  said means for controlling the movement of the material so that it travels only a fraction of the length of the cylinder at each turn and passes several times between the roll and the roll before reaching the exit comprise at least one scraper placed at the inside of the cylinder, in the upper descending part, capable of detaching 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 scraper and deflect it towards the from the mill outlet.
Selon un mode de réalisation, la piste de roulement comprend une couche de matériau dur, d'usure, rapportée sur la paroi intérieure dudit cylindre, formée par une pluralité de plaques d'usure et dans lequel les éléments formant le rebord aval sont des éléments rapportés et solidaires respectivement des plaques d'usure. Selon une autre alternative, les éléments formant le rebord aval sont constitués chacun par le matériau dur des plaques d'usure, lesdits éléments étant respectivement d'un seul tenant avec lesdites plaques d'usure. Selon un mode de réalisation, la piste de roulement est constituée par une couche de matériau dur, d'usure, rapportée sur la paroi intérieure dudit cylindre, formée par une pluralité de plaques d'usure et dans lequel les éléments formant le rebord amont sont des éléments rapportés et solidaires respectivement des plaques d'usure. Selon une autre alternative, les éléments formant le rebord amont sont constitués chacun par le matériau dur des plaques d'usure, lesdits éléments étant respectivement d'un seul tenant avec lesdites plaques d'usure. L'invention sera mieux comprise à la lecture de la description suivante accompagnée des dessins en annexe parmi lesquels : According to one embodiment, the raceway comprises a layer of hard material, of wear, attached to the inner wall of said cylinder, formed by a plurality of wear plates and in which the elements forming the downstream edge are elements reported and secured respectively wear plates. According to another alternative, the elements forming the downstream flange are each constituted by the hard material of the wear plates, said elements being respectively integral with said wear plates. According to one embodiment, the raceway is constituted by a layer of hard material, of wear, attached to the inner wall of said cylinder, formed by a plurality of wear plates and in which the elements forming the upstream edge are inserts and integral respectively wear plates. According to another alternative, the elements forming the upstream flange each consist of the hard material of the wear plates, said elements being respectively integral with said wear plates. The invention will be better understood on reading the following description accompanied by the appended drawings among which:
- La figure 1 illustre le principe de fonctionnement d'un broyeur horizontal par compression du lit de matières (rebord aval non illustré). - La figure 2 est une vue de coupe verticale selon l'axe du cylindre, conforme à l'invention selon un mode de réalisation, et présentant du côté de la sortie des matières, le long d'un périmètre intérieur du cylindre, des éléments constituant des obstacles ralentissant l'évacuation de la matière. - Figure 1 illustrates the principle of operation of a horizontal mill by compression of the material bed (downstream flange not shown). - Figure 2 is a vertical sectional view along the axis of the cylinder, according to the invention according to one embodiment, and having on the output side of the materials, along an inner perimeter of the cylinder, elements constituting obstacles slowing down the evacuation of matter.
- La figure 3 est une vue du dispositif de la figure 2, selon un plan de coupe perpendiculaire à l'axe du cylindre. - Figure 3 is a view of the device of Figure 2, in a sectional plane perpendicular to the axis of the cylinder.
- La figure 4 est une vue de détail d'un élément du rebord aval, et de son positionnement par rapport à la piste de roulement, ainsi que par rapport à l'extrémité aval du rouleau de broyage. - Figure 4 is a detailed view of a downstream flange element, and its positioning relative to the raceway, as well as with respect to the downstream end of the grinding roller.
- La figure 5 illustre un mode de réalisation particulier de l'invention, présentant outre le rebord aval, destiné à freiner l'échappement des matières au niveau de l'extrémité aval du rouleau de broyage, un rebord amont destiné à freiner l'échappement des matières au niveau de l'extrémité amont du rouleau de broyage. FIG. 5 illustrates a particular embodiment of the invention, presenting in addition to the downstream flange, intended to slow the escape of the materials at the downstream end of the grinding roller, an upstream flange intended to brake the exhaust. materials at the upstream end of the grinding roll.
- La figure 6 illustre une plaque d'usure formant partie de la couche protectrice du cylindre et destinée à équiper le cylindre en aval de la piste de roulement, un élément du rebord aval et ladite plaque d'usure étant attenant par l'extrémité aval de ladite plaque. - Figure 6 illustrates a wear plate forming part of the protective layer of the cylinder and intended to equip the cylinder downstream of the raceway, an element of the downstream flange and said wear plate being contiguous by the downstream end of said plate.
L'invention concerne un broyeur 1 par compression de lit de matières comprenant : The invention relates to a crusher 1 by compression of a bed of materials comprising:
- un cylindre 2 à axe horizontal A dont la paroi intérieure est pourvue d'une piste de roulement pour un rouleau de broyage 3, disposé intérieur audit cylindre, a cylinder 2 having a horizontal axis A whose inner wall is provided with a rolling track for a grinding roll 3 disposed inside said cylinder,
- des moyens pour entraîner en rotation le cylindre autour de son axe à une vitesse assurant la centrifugation de la matière,  means for rotating the cylinder about its axis at a speed ensuring the centrifugation of the material,
- ledit rouleau de broyage 3,  said grinding roll 3,
- des moyens pour appliquer ledit rouleau de broyage 3 contre la piste de roulement dudit cylindre, - une entrée 7 pour l'alimentation de la matière à broyer située à l'une des extrémités du cylindre et une sortie 8 pour la matière broyée à l'autre extrémité dudit cylindre,means for applying said grinding roll 3 against the rolling track of said roll, an inlet 7 for feeding the material to be ground at one end of the cylinder and an outlet 8 for the ground material at the other end of said cylinder,
- des moyens pour contrôler le déplacement de la matière de sorte qu'elle parcourt seulement une fraction de la longueur du cylindre à chaque tour et passe plusieurs fois entre le cylindre et le rouleau avant d'atteindre la sortie. means for controlling the movement of the material so that it travels only a fraction of the length of the cylinder at each turn and passes several times between the roll and the roll before reaching the exit.
Le cylindre 2 à axe horizontal A peut-être une virole, notamment métallique, en appui sur des paliers (non illustrés) notamment hydrostatiques assurant le guidage en rotation du cylindre autour de son axe horizontal A. La piste de roulement peut être formée par une couche 6 de matériau dur, d'usure, rapportée sur la paroi intérieure dudit cylindre, formée par une pluralité de plaques d'usure 61. Lesdits moyens pour entraîner en rotation le cylindre autour de son axe A peuvent comprendre un motoréducteur dont l'axe de sortie présente un pignon couplé à une couronne dentée, solidaire de la paroi extérieure du cylindre 2. Selon l'invention, ces moyens entraînent le cylindre 2 à une vitesse assurant une centrifugation de la matière. En d'autres termes, la vitesse du cylindre 2 est telle que la matière est, sous l'effet de la force centrifuge, maintenue contre la piste de roulement, pendant la rotation du cylindre. The cylinder 2 with horizontal axis A may be a ferrule, in particular metal, resting on bearings (not illustrated) in particular hydrostatic ensuring rotation guidance of the cylinder about its horizontal axis A. The raceway may be formed by a layer 6 of hard material, wear, reported on the inner wall of said cylinder, formed by a plurality of wear plates 61. Said means for rotating the cylinder about its axis A may comprise a geared motor whose axis the output has a gear coupled to a ring gear, secured to the outer wall of the cylinder 2. According to the invention, these means drive the cylinder 2 at a speed ensuring centrifugation of the material. In other words, the speed of the cylinder 2 is such that the material is, under the effect of the centrifugal force, held against the raceway during the rotation of the cylinder.
Lesdits moyens pour appliquer le rouleau de broyage contre la piste de roulement peuvent comprendre des bras guidant les extrémités du rouleau de broyage 3 par l'intermédiaire de roulement, ainsi que des vérins ou des ressorts aptes à exercer une force sur les extrémités du rouleau de broyage 3, et reliés auxdits bras. Selon un mode de réalisation, lesdits moyens pour appliquer le rouleau de broyage 3 contre la piste de roulement sont tels que le rouleau de broyage exerce sur le lit de matières une pression P moyenne comprise entre 10 MPa et 40 MPa. Le rouleau de broyage est d'axe sensiblement parallèle à celui de l'axe du cylindre. Said means for applying the grinding roll against the tread may comprise arms guiding the ends of the grinding roll 3 by rolling means, as well as jacks or springs able to exert a force on the ends of the roll of grinding 3, and connected to said arms. According to one embodiment, said means for applying the grinding roll 3 against the tread are such that the grinding roll exerts on the material bed a mean pressure P of between 10 MPa and 40 MPa. The grinding roll is of axis substantially parallel to that of the axis of the cylinder.
L'alimentation du broyeur 1 est effectuée à l'entrée 7 à l'une des extrémités du cylindre 2, la sortie 8 des matières broyées étant située à l'autre extrémité du cylindre. Entre l'entrée 7 et la sortie 8, la matière passe plusieurs fois entre la piste de roulement et le rouleau de broyage 3, parcourant une fraction de la longueur du cylindre à chaque tour. L'avancée des matières dans le cylindre est ainsi régulée par des moyens qui peuvent comprendre un dispositif destiné à assurer l'avance de la matière, d'une extrémité à l'autre du cylindre 2, et tel que notamment ceux décrits dans le document EP 0 486 371 ou encore EP 0 934 120. Un tel dispositif comprend au moins un racleur (ou couteau) placé à l'intérieur du cylindre, dans la partie supérieure descendante, ainsi qu'une ou plusieurs plaques déflectrices, disposées sous le racleur. Le racleur permet de détacher la matière de la piste de roulement, qui, autrement, serait maintenue contre la piste sous l'effet de la force centrifuge. Le ou les déflecteurs placés en dessous du racleur intercepte la matière détachée par le dernier et la dévie dans la direction de la sortie du broyeur. The feed mill 1 is performed at the inlet 7 at one end of the cylinder 2, the outlet 8 of the ground material being located at the other end of the cylinder. Between the inlet 7 and the outlet 8, the material passes several times between the raceway and the grinding roll 3, running a fraction of the length of the cylinder at each turn. The advance of the materials in the cylinder is thus regulated by means which can comprise a device intended to ensure the advance of the material, from one end to the other of the cylinder 2, and such as in particular those described in the document EP 0 486 371 or EP 0 934 120. Such a device comprises the less a scraper (or knife) placed inside the cylinder, in the upper descending part, and one or more deflector plates, arranged under the scraper. The scraper makes it possible to detach the material from the raceway, which otherwise would be held against the track under the effect of the centrifugal force. The baffle (s) below the wiper intercepts the loose material from the last and deflects it in the direction of the mill outlet.
Selon l'invention, la piste de roulement est suivie d'un rebord aval, destiné à s'opposer à l'écoulement de la matière, situé en aval dudit rouleau de broyage selon le sens de déplacement de la matière. Un mode de réalisation d'un broyeur pourvu d'un tel rebord aval est illustré, à titre d'exemple non limitatif, aux figures 2, 3 et 4. La fonction de ce rebord aval est de ralentir l'échappement de la matière au niveau de l'extrémité aval du rouleau de broyage 3, évitant ainsi que le lit de matières au niveau de cette extrémité soit de trop faible épaisseur, et comme illustré en détail à la figure 4. According to the invention, the raceway is followed by a downstream rim, intended to oppose the flow of the material, located downstream of said grinding roller in the direction of movement of the material. One embodiment of a mill provided with such a downstream flange is illustrated, by way of non-limiting example, in FIGS. 2, 3 and 4. The function of this downstream flange is to slow the escape of the material to level of the downstream end of the grinding roll 3, thus avoiding that the bed of materials at this end is too thin, and as shown in detail in Figure 4.
Selon l'invention, ce rebord aval comprend plusieurs éléments 4 disposés selon un périmètre intérieur dudit cylindre 2. L'ensemble des éléments formant le rebord aval occupe, selon un mode de réalisation, au moins 75% du périmètre intérieur du cylindre 2. Ces éléments 4 peuvent être des éléments en arc de cercle, notamment de section constante sur la longueur, et de rayon de courbure correspondant notamment sensiblement au cylindre (ou à la piste de roulement). According to the invention, this downstream flange comprises a plurality of elements 4 arranged along an inside perimeter of said cylinder 2. The set of elements forming the downstream flange occupies, according to one embodiment, at least 75% of the inside perimeter of the cylinder 2. These elements 4 may be elements in an arc of a circle, in particular of constant section along the length, and of radius of curvature corresponding in particular substantially to the cylinder (or to the raceway).
Selon une alternative notamment illustrée aux figures 3 et 4, le rebord aval sur le périmètre intérieur du cylindre est un rebord discontinu. Lesdits éléments 4 peuvent être répartis sur un périmètre intérieur, mutuellement espacés, créant une pluralité de passages sur le périmètre intérieur. Ces différents passages, constitués par les interespaces entre éléments 4, sont répartis sur le périmètre du cylindre 2, et de préférence régulièrement. D'une manière générale, l'évacuation de la matière est obtenue, soit par effet de débordement de la matière au-dessus des éléments 4 du rebord aval, soit au travers des passages entre éléments 4 (dans le cas d'un rebord discontinu), soit par la combinaison des deux effets. Selon un mode de réalisation, la hauteur h des éléments 4 formant le rebord aval et dépassant de la piste de roulement est comprise entre 1% et 5% du diamètre D du rouleau de broyage 3. La hauteur h est illustrée à la figure 4 : il s'agit de la dimension de l'élément 4, à partir de la surface de la piste de roulement, et selon une direction radiale au cylindre. According to an alternative illustrated in particular in FIGS. 3 and 4, the downstream rim on the inside perimeter of the cylinder is a discontinuous rim. Said elements 4 can be distributed on an inner perimeter, mutually spaced, creating a plurality of passages on the inner perimeter. These different passages, constituted by the inter-spaces between elements 4, are distributed over the perimeter of the cylinder 2, and preferably regularly. In general, the evacuation of the material is obtained, either by the overflow effect of the material above the elements 4 of the downstream rim, or through the passages between elements 4 (in the case of a discontinuous rim). ), or by the combination of the two effects. According to one embodiment, the height h of the elements 4 forming the downstream flange and protruding from the raceway is between 1% and 5% of the diameter D of the grinding roller 3. The height h is illustrated in FIG. it is the dimension of the element 4, from the surface of the raceway, and in a radial direction to the cylinder.
Selon un mode de réalisation, la distance d entre l'extrémité aval du rouleau de broyage 3 et le rebord aval est comprise entre 1,5 % et 7,5% du diamètre D du rouleau de broyage 3. La distance d est illustrée à la figure 4 : il s'agit de la dimension, selon la direction axiale du cylindre 2, entre l'extrémité aval du rouleau de broyage 3, et le rebord aval. La longueur L du rouleau de broyage 3 peut être de longueur inférieure à la piste de roulement. According to one embodiment, the distance d between the downstream end of the grinding roll 3 and the downstream flange is between 1.5% and 7.5% of the diameter D of the grinding roll 3. The distance d is illustrated in FIG. Figure 4: it is the dimension, in the axial direction of the cylinder 2, between the downstream end of the grinding roller 3, and the downstream flange. The length L of the grinding roll 3 may be shorter than the running track.
Le broyeur selon l'invention est ainsi avantageusement équipé d'un rebord aval destiné à freiner l'écoulement de la matière, dans la zone du broyeur où la matière est la plus fine, au niveau de l'extrémité aval du rouleau 3, en particulier à la sortie 8 du broyeur. Un tel rebord, à l'autre extrémité de la piste de roulement, c'est-à-dire en amont du rouleau de broyage, est toutefois facultatif. Ainsi, et selon un mode de réalisation illustré non limitativement à la figure 2, le broyeur peut être dépourvu d'un tel rebord, en amont du rouleau de broyage 3. Un tel rebord amont peut présenter toutefois un intérêt en particulier dans le cas où la matière en entrée du broyeur présente une proportion importante de particules fines, et de manière à limiter les phénomènes d'échappement et de reflux au niveau de l'extrémité amont du rouleau de broyage 3. Selon un mode de réalisation, la piste de roulement peut être précédée d'un rebord amont, s'opposant à l'écoulement de la matière, dans le sens du reflux. La fonction de ce rebord amont est de ralentir l'échappement de la matière au niveau de l'extrémité amont du rouleau de broyage 3, évitant ainsi que le lit de matières au niveau de cette extrémité soit de trop faible épaisseur, et comme illustré en détail à la figure 5. Ce rebord peut comprendre plusieurs éléments 41 disposés selon un périmètre intérieur dudit cylindre 2. The mill according to the invention is thus advantageously equipped with a downstream flange for braking the flow of the material, in the area of the mill where the material is the thinnest, at the downstream end of the roll 3, in particular at the outlet 8 of the mill. Such a rim, at the other end of the raceway, that is to say upstream of the grinding roller, is optional. Thus, and according to an embodiment shown without limitation in Figure 2, the mill may be devoid of such a rim, upstream of the grinding roller 3. Such an upstream edge may however be of interest especially in the case where the input material of the mill has a large proportion of fine particles, and so as to limit the phenomena of escape and reflux at the upstream end of the grinding roll 3. According to one embodiment, the rolling track may be preceded by an upstream rim, opposing the flow of the material, in the direction of reflux. The function of this upstream flange is to slow down the escape of the material at the upstream end of the grinding roll 3, thus avoiding that the bed of materials at this end is too thin, and as shown in detail in FIG. FIG. 5. This flange may comprise several elements 41 arranged along an inside perimeter of said cylinder 2.
L'ensemble des éléments formant le rebord amont occupe, selon un mode de réalisation, au moins 75% du périmètre intérieur du cylindre 2. Ces éléments 4 peuvent prendre la forme d'éléments en arc de cercle et de rayon de courbure correspondant notamment sensiblement au cylindre ou à la piste de roulement. The set of elements forming the upstream edge occupies, according to one embodiment, at least 75% of the internal perimeter of the cylinder 2. These elements 4 may take the form of elements in a circular arc and corresponding radius of curvature notably substantially to the cylinder or the raceway.
Selon une alternative, le rebord amont sur le périmètre intérieur du cylindre est un rebord discontinu. Lesdits éléments 41 sont alors répartis sur un périmètre intérieur, mutuellement espacés, créant une pluralité de passages sur le périmètre intérieur. Ces différents passages, constitués par les inter-espaces entre éléments 4, sont répartis sur le périmètre du cylindre 2, et de préférence régulièrement sur le périmètre du cylindre. Alternatively, the upstream edge on the inner perimeter of the cylinder is a discontinuous rim. Said elements 41 are then distributed on an inner perimeter, mutually spaced, creating a plurality of passages on the inner perimeter. These different passages, constituted by the inter-spaces between elements 4, are distributed on the perimeter of the cylinder 2, and preferably regularly on the perimeter of the cylinder.
Selon un mode de réalisation avantageux, la hauteur h' des éléments 41 formant le rebord amont et dépassant de la piste de roulement est supérieure à la hauteur h des éléments 4 formant le rebord aval, dépassant de ladite piste de roulement. Par exemple la hauteur h' des éléments 41 peut être comprise entre 100% et 150% de la hauteur h des éléments 4 formant le rebord aval. La distance d' entre l'extrémité amont du rouleau de broyage 3 et le rebord amont peut être comprise entre 1,5% et 7,5% du diamètre D du rouleau de broyage. According to an advantageous embodiment, the height h 'of the elements 41 forming the upstream flange and protruding from the raceway is greater than the height h of the elements 4 forming the downstream flange protruding from said raceway. For example, the height h 'of the elements 41 may be between 100% and 150% of the height h of the elements 4 forming the downstream rim. The distance between the upstream end of the grinding roll 3 and the upstream flange may be between 1.5% and 7.5% of the diameter D of the grinding roll.
Dans le cas où la piste de roulement comprend une couche 6 de matériau dur, d'usure, formée par une pluralité de plaques d'usure 61, les éléments 4 formant le rebord aval peuvent être des éléments rapportés et solidaires respectivement des plaques d'usure 61. Une telle plaque d'usure est illustrée, à titre d'exemple non limitatif à la figure 6. Chaque plaque comprend une surface intérieure concave, destinée à constituer partie de la piste de roulement, une surface extérieure convexe, destinée à être fixée et appliquée à la paroi intérieure du cylindre et des bords notamment d'assemblage, en particulier au nombre de quatre. In the case where the raceway comprises a layer 6 of hard material, wear, formed by a plurality of wear plates 61, the elements 4 forming the downstream flange may be inserts and secured respectively plates of 61. Such a wear plate is illustrated by way of non-limiting example in FIG. 6. Each plate comprises a concave inner surface, intended to constitute part of the rolling track, a convex outer surface intended to be fixed and applied to the inner wall of the cylinder and including assembly edges, in particular four in number.
Chaque élément 4 notamment de forme en arc de cercle, est de dimension inférieure à ladite plaque et est liée à ladite plaque par tous moyens adaptés, tels que colle, soudure, fixation mécanique. L'élément 4 peut être lié à la surface extérieure convexe de la plaque, au niveau de l'extrémité aval de ladite plaque d'usure. Selon une alternative, les éléments 4 formant le rebord aval sont constitués chacun par le matériau dur des plaques d'usure 61, lesdits éléments 4 étant respectivement d'un seul tenant avec lesdites plaques d'usure 61. Each element 4 in particular of arcuate shape, is of smaller dimension than said plate and is bonded to said plate by any suitable means, such as glue, welding, mechanical fixing. Element 4 may be bonded to the convex outer surface of the plate at the downstream end of said wear plate. According to an alternative, the elements 4 forming the downstream flange each consist of the hard material of the wear plates 61, said elements 4 being respectively integral with said wear plates 61.
Dans les deux cas, les éléments 4 et les plaques d'usure 61 correspondantes forment par paire, respectivement des ensembles mécaniques qui permettront de réaliser, simultanément, la couche d'usure 6 et le rebord aval, lors de l'assemblage des plaques 61. In both cases, the elements 4 and the corresponding wear plates 61 form, in pairs, respectively mechanical assemblies which will make it possible, simultaneously, to make the wear layer 6 and the downstream flange, during the assembly of the plates 61 .
De la même manière, les éléments 41 formant le rebord amont peuvent être des éléments rapportés et solidaires respectivement des plaques d'usure 61. Chaque élément 41 notamment de forme en arc de cercle, est de dimension inférieure à ladite plaque et est solidarisé à ladite plaque par tous moyens adaptés, tels que colle, soudure, fixation mécanique. L'élément 41 peut être lié à la surface extérieure convexe de la plaque 61, au niveau de l'extrémité amont de ladite plaque d'usure 41. Selon une alternative, les éléments 41 formant le rebord amont sont constitués chacun par le matériau dur des plaques d'usure 61, lesdits éléments 41 étant respectivement d'un seul tenant avec lesdites plaques d'usure 61. Dans les deux cas, les éléments 41 et les plaques d'usure 61 correspondantes forment par paires, respectivement des ensembles mécaniques qui permettront de réaliser, simultanément, la couche d'usure 6 et le rebord aval, lors de l'assemblage des plaques 61. Naturellement d'autres modes de réalisation auraient pu être envisagés par l'homme du métier sans pour autant sortir du cadre de l'invention tel que défini par les revendications ci-après. NOMENCLATURE In the same manner, the elements 41 forming the upstream flange may be inserts and integral respectively wear plates 61. Each element 41 in particular of arcuate shape, is of smaller dimension than said plate and is secured to said plate by any suitable means, such as glue, welding, mechanical fastening. The element 41 can be connected to the convex outer surface of the plate 61, at the upstream end of said wear plate 41. According to an alternative, the elements 41 forming the upstream edge are each constituted by the hard material wear plates 61, said elements 41 being respectively integral with said wear plates 61. In both cases, the elements 41 and the corresponding wear plates 61 form in pairs, respectively mechanical assemblies which allow to achieve, simultaneously, the wear layer 6 and the downstream rim, during the assembly of the plates 61. Naturally other embodiments could have been envisaged by the skilled person without departing from the scope of the invention as defined by the claims below. NOMENCLATURE
1. Broyeur, 1. Crusher,
2. Cylindre, 2. Cylinder,
3. Rouleau de broyage, 3. Grinding roll,
4. Eléments (rebord aval), 41. Eléments (rebord amont) 61. Plaque d'usure, 4. Elements (downstream edge), 41. Elements (upstream edge) 61. Wear plate,
6. Couche de matériau dur 6. Layer of hard material
7. Entrée (broyeur), 7. Input (grinder),
8. Sortie (broyeur), 8. Output (crusher),
d. Distance séparant le rouleau de broyage du rebord aval, d'. Distance séparant le rouleau de broyage du rebord amont, D. Diamètre du rouleau de broyage, h. Hauteur des éléments repérés 4 du rebord aval (par référence à la surface de la piste de roulement), h'. Hauteur des éléments repérés 41 du rebord amont (par référence à la surface de la piste de roulement), A. Axe horizontal d. Distance separating the grinding roll from the downstream flange of. Distance separating the grinding roller from the upstream edge, D. Diameter of the grinding roller, h. Height of the elements marked 4 on the downstream edge (with reference to the surface of the raceway), h '. Height of identified elements 41 of the upstream edge (with reference to the surface of the race), A. Horizontal axis
L. Longueur du rouleau de broyage L. Length of grinding roller
P. Pression P. Pressure

Claims

REVENDICATIONS
1. Broyeur (1) par compression de lit de matières comprenant : 1. Crusher (1) by compression of bed of materials comprising:
- un cylindre (2) à axe horizontal (A) dont la paroi intérieure est pourvue d'une piste de roulement pour un rouleau de broyage (3), disposé intérieur audit cylindre,  - a cylinder (2) with a horizontal axis (A) whose inner wall is provided with a rolling track for a grinding roll (3) disposed inside said cylinder,
- des moyens pour entraîner en rotation le cylindre autour de son axe à une vitesse assurant la centrifugation de la matière,  means for rotating the cylinder about its axis at a speed ensuring the centrifugation of the material,
- ledit rouleau de broyage (3),  said grinding roll (3),
- des moyens pour appliquer ledit rouleau de broyage contre la piste de roulement dudit cylindre,  means for applying said grinding roller against the rolling track of said cylinder,
- une entrée (7) pour l'alimentation de la matière à broyer située à l'une des extrémités du cylindre et une sortie (8) pour la matière broyée à l'autre extrémité dudit cylindre, an inlet (7) for feeding the material to be ground at one end of the cylinder and an outlet (8) for the ground material at the other end of said cylinder,
- des moyens pour contrôler le déplacement de la matière de sorte qu'elle parcourt seulement une fraction de la longueur du cylindre à chaque tour et passe plusieurs fois entre le cylindre et le rouleau avant d'atteindre la sortie, means for controlling the movement of the material so that it travels only a fraction of the length of the cylinder at each turn and passes several times between the roll and the roll before reaching the exit,
caractérisé en ce que la piste de roulement est suivie d'un rebord aval, destiné à s'opposer à l'écoulement de la matière, situé en aval dudit rouleau de broyage selon le sens de déplacement de la matière, ledit rebord aval comprenant plusieurs éléments (4) disposés selon un périmètre intérieur dudit cylindre (2). characterized in that the rolling track is followed by a downstream flange, intended to oppose the flow of the material, located downstream of said grinding roll in the direction of movement of the material, said downstream flange comprising several elements (4) arranged in an interior perimeter of said cylinder (2).
2. Broyeur selon la revendication 1, dans lequel l'ensemble des éléments formant le rebord aval occupe au moins 75% du périmètre intérieur du cylindre. 2. Mill according to claim 1, wherein the set of elements forming the downstream rim occupies at least 75% of the inner perimeter of the cylinder.
3. Broyeur selon la revendication 1 ou 2, dans lequel la hauteur (h) des éléments formant le rebord aval et dépassant de la piste de roulement est comprise entre 1% et3. Mill according to claim 1 or 2, wherein the height (h) of the elements forming the downstream flange and protruding from the raceway is between 1% and
5%> du diamètre (D) du rouleau de broyage. 5%> of the diameter (D) of the grinding roll.
4. Broyeur selon l'une des revendications 1 à 3, dans lequel la distance (d) entre l'extrémité aval du rouleau de broyage (3) et le rebord aval est comprise entre 1,5% et 7,5%) du diamètre (D) du rouleau de broyage (3). 4. Mill according to one of claims 1 to 3, wherein the distance (d) between the downstream end of the grinding roller (3) and the downstream edge is between 1.5% and 7.5%) of the diameter (D) of the grinding roll (3).
5. Broyeur selon l'une des revendications 1 à 4, dans lequel la piste de roulement est précédée d'un rebord amont, s'opposant à l'écoulement de la matière dans le sens du reflux, situé en amont dudit rouleau de broyage selon le sens de déplacement de la matière, ledit rebord comprenant plusieurs éléments (41) disposés selon un périmètre intérieur dudit cylindre (2). 5. Mill according to one of claims 1 to 4, wherein the raceway is preceded by an upstream flange, opposing the flow of the material in the direction of reflux, located upstream of said grinding roller. according to the direction of movement of the material, said rim comprising a plurality of elements (41) arranged along an internal perimeter of said cylinder (2).
6. Broyeur selon la revendication 5, dans lequel l'ensemble des éléments (41) formant le rebord amont occupe au moins 75% du périmètre intérieur du cylindre. 6. Mill according to claim 5, wherein all the elements (41) forming the upstream flange occupies at least 75% of the inner perimeter of the cylinder.
7. Broyeur selon la revendication 5 ou 6 dans lequel la hauteur (h') des éléments (41) formant le rebord amont et dépassant de la piste de roulement est comprise entre 100% et 150%) de la hauteur (h) des éléments (4) formant le rebord aval, dépassant de ladite piste de roulement. 7. Mill according to claim 5 or 6 wherein the height (h ') of the elements (41) forming the upstream flange and protruding from the raceway is between 100% and 150%) of the height (h) of the elements. (4) forming the downstream flange protruding from said raceway.
8. Broyeur selon l'une des revendications 5 à 7, dans lequel la distance (d') entre l'extrémité amont du rouleau de broyage (3) et le rebord amont est comprise entre 1,5% et 7,5%o du diamètre (D) du rouleau de broyage. 8. Mill according to one of claims 5 to 7, wherein the distance (d ') between the upstream end of the grinding roller (3) and the upstream edge is between 1.5% and 7.5% o the diameter (D) of the grinding roll.
9. Broyeur selon l'une des revendications 1 à 4 dans lequel la piste de roulement est dépourvue d'un rebord amont s'opposant à l'écoulement de la matière. 9. Mill according to one of claims 1 to 4 wherein the raceway is devoid of an upstream flange opposing the flow of the material.
10. Broyeur selon l'une des revendications 1 à 9, dans lequel la piste de roulement comprend une couche (6) de matériau dur, d'usure, rapportée sur la paroi intérieure dudit cylindre (2), formée par une pluralité de plaques d'usure (61) et dans lequel les éléments (4) formant le rebord aval sont des éléments rapportés et solidaires respectivement des plaques d'usure (61). 10. Mill according to one of claims 1 to 9, wherein the raceway comprises a layer (6) of hard material wear, attached to the inner wall of said cylinder (2), formed by a plurality of plates (61) and wherein the elements (4) forming the downstream flange are inserts and integral respectively wear plates (61).
11. Broyeur selon l'une des revendications 1 à 9, dans lequel la piste de roulement est constituée par une couche (6) de matériau dur, d'usure, rapportée sur la paroi intérieure dudit cylindre, formée par une pluralité de plaques d'usure (61) et dans lequel les éléments (4) formant le rebord aval sont constitués chacun par le matériau dur des plaques d'usure (61), lesdits éléments (4) étant respectivement d'un seul tenant avec lesdites plaques d'usure (61). 11. Mill according to one of claims 1 to 9, wherein the raceway is constituted by a layer (6) of hard material wear, reported on the inner wall of said cylinder, formed by a plurality of plates of wear (61) and in which the elements (4) forming the downstream flange are each constituted by the hard material of the wear plates (61), said elements (4) being respectively integral with said wear plates (61).
12. Broyeur selon l'une des revendications 5 à 8, dans lequel la piste de roulement est constituée par une couche de matériau dur (6), d'usure, rapportée sur la paroi intérieure dudit cylindre (2), formée par une pluralité de plaques d'usure (61) et dans lequel les éléments (41) formant le rebord amont sont des éléments rapportés et solidaires respectivement des plaques d'usure. 12. Crusher according to one of claims 5 to 8, wherein the raceway is constituted by a layer of hard material (6), of wear, attached to the inner wall of said cylinder (2), formed by a plurality wear plates (61) and wherein the elements (41) forming the upstream flange are inserts and integral respectively wear plates.
13. Broyeur selon l'une des revendications 5 à 8, dans lequel la piste de roulement est constituée par une couche de matériau dur, d'usure, rapportée sur la paroi intérieure dudit cylindre, formée par une pluralité de plaques d'usure (61) et dans lequel les éléments (41) formant le rebord amont sont constitués chacun par le matériau dur des plaques d'usure, lesdits éléments (41) étant respectivement d'un seul tenant avec lesdites plaques d'usure (61). 13. Mill according to one of claims 5 to 8, wherein the raceway is constituted by a layer of hard material, wear, attached to the inner wall of said cylinder, formed by a plurality of wear plates ( 61) and wherein the elements (41) forming the upstream flange each consist of the hard material of the wear plates, said elements (41) being respectively integral with said wear plates (61).
14. Broyeur selon l'une des revendications 1 à 13, dans lequel le rebord aval sur le périmètre intérieur du cylindre est un rebord discontinu, lesdits éléments (4) étant répartis sur le périmètre intérieur, mutuellement espacés, créant une pluralité de passages sur le périmètre intérieur. 14. Mill according to one of claims 1 to 13, wherein the downstream edge on the inner perimeter of the cylinder is a discontinuous rim, said elements (4) being distributed on the inner perimeter, mutually spaced, creating a plurality of passages on the inner perimeter.
15. Broyeur selon l'une des revendications 1 à 14, dans lequel le rebord amont sur le périmètre intérieur du cylindre est un rebord discontinu, lesdits éléments (41) étant répartis sur le périmètre intérieur, mutuellement espacés, créant une pluralité de passages sur le périmètre intérieur. 15. Mill according to one of claims 1 to 14, wherein the upstream edge on the inner perimeter of the cylinder is a discontinuous flange, said elements (41) being distributed on the inner perimeter, mutually spaced, creating a plurality of passages on the inner perimeter.
16. Broyeur selon l'une des revendications 1 à 15, dans lequel lesdits moyens pour contrôler le déplacement de la matière de sorte qu'elle parcourt seulement une fraction de la longueur du cylindre à chaque tour et passe plusieurs fois entre le cylindre et le rouleau avant d'atteindre la sortie comprennent au moins un racleur placé à l'intérieur du cylindre, dans la partie supérieure descendante, apte à détacher la matière de la piste de roulement et une plaque déflectrice disposée sous le racleur de façon à intercepter la matière détachée par le racleur et la dévier vers la sortie du racleur. The mill according to one of claims 1 to 15, wherein said means for controlling the movement of the material so that it travels only a fraction of the length of the roll at each turn and passes several times between the roll and the roll. roll before reaching the exit comprise at least one scraper placed inside the cylinder, in the upper descending part, able to detach the material from the track and a deflector plate disposed under the scraper so as to intercept the material detached by the scraper and deflect it towards the outlet of the scraper.
17. Utilisation d'un broyeur selon l'une des revendications 1 à 16, pour le broyage de matière minérale, en particulier dans le cadre de la fabrication de ciment. 17. Use of a mill according to one of claims 1 to 16 for the grinding of mineral material, in particular in the context of the manufacture of cement.
EP15797118.5A 2014-10-10 2015-10-07 Mill for crushing a bed of materials by compression Active EP3204163B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1459719A FR3026967B1 (en) 2014-10-10 2014-10-10 COMPRESSOR BINDER OF BED OF MATERIALS
PCT/FR2015/052691 WO2016055734A1 (en) 2014-10-10 2015-10-07 Mill for crushing a bed of materials by compression

Publications (2)

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EP3204163A1 true EP3204163A1 (en) 2017-08-16
EP3204163B1 EP3204163B1 (en) 2020-07-29

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US (1) US10589281B2 (en)
EP (1) EP3204163B1 (en)
JP (1) JP2017530005A (en)
CN (1) CN107107066B (en)
BR (1) BR112017007208B8 (en)
DK (1) DK3204163T3 (en)
ES (1) ES2812623T3 (en)
FR (1) FR3026967B1 (en)
MX (1) MX2017004643A (en)
RU (1) RU2701679C2 (en)
UA (1) UA120862C2 (en)
WO (1) WO2016055734A1 (en)

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CN109482274B (en) * 2018-12-11 2021-11-26 广东隽诺环保科技股份有限公司 Improved roll crushing component

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WO2016055734A1 (en) 2016-04-14
JP2017530005A (en) 2017-10-12
BR112017007208B1 (en) 2021-08-03
MX2017004643A (en) 2017-07-17
CN107107066B (en) 2020-05-05
FR3026967B1 (en) 2016-10-28
RU2017115947A3 (en) 2019-03-21
BR112017007208A2 (en) 2018-01-16
US10589281B2 (en) 2020-03-17
CN107107066A (en) 2017-08-29
BR112017007208B8 (en) 2021-12-28
UA120862C2 (en) 2020-02-25
FR3026967A1 (en) 2016-04-15
EP3204163B1 (en) 2020-07-29
ES2812623T3 (en) 2021-03-17
US20170304834A1 (en) 2017-10-26
RU2701679C2 (en) 2019-09-30
DK3204163T3 (en) 2020-08-31
RU2017115947A (en) 2018-11-13

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