EP1925722A1 - Refining element for refining fibres, in particular papermaking fibres, and refiner with such a refining element - Google Patents
Refining element for refining fibres, in particular papermaking fibres, and refiner with such a refining element Download PDFInfo
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- EP1925722A1 EP1925722A1 EP07301372A EP07301372A EP1925722A1 EP 1925722 A1 EP1925722 A1 EP 1925722A1 EP 07301372 A EP07301372 A EP 07301372A EP 07301372 A EP07301372 A EP 07301372A EP 1925722 A1 EP1925722 A1 EP 1925722A1
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- Prior art keywords
- refiner
- refining
- refining element
- teeth
- blades
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/20—Methods of refining
- D21D1/30—Disc mills
- D21D1/306—Discs
Definitions
- the invention relates to a refining element for fibers, in particular papermaking fibers, more particularly intended to be used in a pulp pulp refining apparatus commonly known as pulp refiner in the field in question, or for high concentration refining for wood chips.
- the paper consists essentially of randomly distributed cellulose fibers, the cohesion of which is ensured by bonds of a chemical nature when the water is removed from the paper pulp which constitutes it.
- This pulp consists essentially of individual cellulose fibers in the form of tubes comprising a number of concentric layers.
- This refining consists in fact essentially to achieve a partial grinding of the fibers involved in the constitution of the pulp, said at this stage pulp triturated.
- refiners usually consisting of moving disks or rotors cooperating with fixed disks or stators, these disks being parallel to each other and coaxial, and between which flows the triturated raw pulp to be treated, and whose final product is a refined paste.
- the discs in question are provided with an active surface having a certain number of teeth or blades forming as many projections with respect to the surface of the disc in question. It is therefore defined between the rotors and the stator a gap formed by the space between the two active surfaces, including the respective blades or teeth.
- the paste to be circulated in the grooves defined by the teeth or blades is found in the air gap due to the movement in the form of flocks, the latter then undergoing a grinding treatment by the cooperation of the edges and surfaces of the blades or teeth respectively rotor and stator.
- fittings are most often made of metal (stainless steel or cast iron). They are also generally produced in one piece in a form of a crown. They may, however, consist of an assembly of segments in the form of ring sectors, reported in particular by bolting on the plates of the rotors and the stator.
- Molded gaskets for which the patterns are obtained by traditional casting processes, are also known. If the foundry technique is now well controlled, allowing in fact to reduce manufacturing costs, however the fittings thus obtained are not reusable.
- the bottom edge of the teeth reduces the flow rate of the dough, which can induce a variation in refining as and when the wear of the teeth. What's more, the types of patterns of the blades or teeth are quite limited.
- the present invention aims to overcome these disadvantages, both in terms of manufacturing cost and simplification of maintenance operations.
- a fiber refining element used in a pulp or wood chip refiner comprising on its active surface a plurality of protruding blades or teeth, parallel to one another within a same area of said active surface, and intended to be fixed on a plate or support of one of the active parts of said refiner.
- said element consists of a sheet resulting from rolling, cut according to the desired shape of the element.
- the invention consists mainly in the implementation, instead of the previously known techniques, of a rolled sheet having significant advantages especially in terms of weight and therefore maintenance, and in terms of costs .
- the constituent material of the sheet may be steel, including stainless steel or any other type of steel. It may, however, be of a different nature, and in particular be made of non-ferrous metals, synthetic materials, etc.
- the element when made of steel, undergoes a specific heat treatment step, making it possible to significantly increase the hardness of the active surface, until it reaches or even exceeds that likely to be obtained by stainless steel foundry technology and in particular hardnesses close to 50 to 60 HRC.
- the fiber refining element of the invention is capable of being used in a disc refiner, a conical refiner or a cylindrical refiner.
- the refiner is a disc refiner, and comprises respectively two stators and two rotors, the refining element of the invention then consisting of a circular ring.
- this circular ring is not mounted directly on the plate of the rotors and the stators, but on an intermediate element also known under the English expression “spacer ", suitable to compensate for the difference in thickness of trim elements of the prior art, in addition to adjusting the air gap between the rotor and the stator.
- the disks of the disc refiner each consist of the stack of a support plate, the "spacer", and the circular crown.
- the circular ring may be divided into two half-disks or even a plurality of ring sectors, also obtained from rolled steel sheets, and attached to the spacer by bolting.
- Figure 1 is a schematic perspective view of a refining disc according to the invention
- Figure 2 is an exploded view
- Figure 3 is a view from above of the refining element of the invention.
- FIG. 1 shows a refining disk according to the invention, intended to be used in a refiner for paper pulp.
- the plate (1) of the disk fixed or mobile, depending on whether it is a stator or a rotor.
- an intermediate element also called "spacer" (2), intended, as mentioned above, to compensate for the loss of thickness and further to allow the clamping discs vis-à-vis the refiner, c that is to say to allow the adjustment of the gap between the respective teeth of the rotor and the stator.
- this intermediate element (2) is no longer removed from the refiner and remains on the plate (1).
- the wear part that is to say the packing element according to the invention.
- This in the example described consists of a circular ring, coaxial with firstly the spacer (2) and secondly the plate (1) of the rotor or stator, and substantially of the same size peripheral.
- this lining (3) is made from a stainless steel sheet obtained by rolling.
- This sheet is cut by conventional methods and in particular laser, and is machined by machining programs identical to those used for producing the fittings of the prior art.
- This machining is intended to define on the active surface (4) of the lining (3), that is to say on the surface facing the opposing disk, a number of teeth or blades (5), forming protrusions with respect to said active surface.
- blades or teeth (5) are oriented parallel to each other within the same area (6) of the active surface of the liner, as can be seen in the various figures.
- the lining (3) is fixed on the spacer (2) by bolting (7), again in a traditional manner.
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Abstract
Description
L'invention concerne un élément de raffinage pour les fibres notamment papetières, plus particulièrement destiné à être mis en oeuvre au sein d'un appareil de raffinage de pulpe pour pâte à papier communément dénommé raffineur de pâte à papier dans le domaine considéré, ou pour le raffinage haute concentration pour les copeaux de bois.The invention relates to a refining element for fibers, in particular papermaking fibers, more particularly intended to be used in a pulp pulp refining apparatus commonly known as pulp refiner in the field in question, or for high concentration refining for wood chips.
De manière connue, le papier est essentiellement constitué de fibres de cellulose distribuées de manière aléatoire, et dont la cohésion est assurée par des liaisons de nature chimique lorsque l'eau est retirée de la pâte à papier qui le constitue.In a known manner, the paper consists essentially of randomly distributed cellulose fibers, the cohesion of which is ensured by bonds of a chemical nature when the water is removed from the paper pulp which constitutes it.
Cette pâte à papier consiste essentiellement en fibres individuelles de cellulose se présentant sous la forme de tubes comprenant un certain nombre de couches concentriques.This pulp consists essentially of individual cellulose fibers in the form of tubes comprising a number of concentric layers.
Afin de permettre la liaison entre les fibres propre à permettre de conférer une certaine cohésion à la pâte à papier, et corollairement d'assurer la constitution de feuilles de papier, on met en oeuvre une étape de raffinage destinée principalement à hydrater, "fibriller", c'est à dire accroître la surface spécifique, et couper les fibres.In order to allow the bonding between the fibers to be able to confer some cohesion on the paper pulp and, as a corollary, to ensure the constitution of paper sheets, a refining step intended mainly to hydrate, "fibrillate" is used. that is, increase the surface area, and cut the fibers.
Ce raffinage consiste en fait essentiellement à réaliser un broyage partiel des fibres entrant dans la constitution de la pâte à papier, dite à ce stade pâte brute triturée.This refining consists in fact essentially to achieve a partial grinding of the fibers involved in the constitution of the pulp, said at this stage pulp triturated.
A cet effet, il est connu depuis longtemps déjà dans le domaine considéré, de mettre en oeuvre des raffineurs, le plus souvent constitués de disques mobiles ou rotors coopérant avec des disques fixes ou stators, ces disques étant parallèles entre eux et coaxiaux, et entre lesquels circule la pâte brute triturée à traiter, et dont le produit final est une pâte raffinée.For this purpose, it has been known for a long time already in the field considered, to use refiners, usually consisting of moving disks or rotors cooperating with fixed disks or stators, these disks being parallel to each other and coaxial, and between which flows the triturated raw pulp to be treated, and whose final product is a refined paste.
Afin d'opérer cette étape de broyage, on munit les disques en question d'une surface active présentant un certain nombre de dents ou lames formant autant de saillies par rapport à la surface du disque en question. Il est donc défini entre les rotors et le stator un entrefer constitué par l'espace séparant les deux surfaces actives, et notamment les lames ou dents respectives.In order to carry out this grinding step, the discs in question are provided with an active surface having a certain number of teeth or blades forming as many projections with respect to the surface of the disc in question. It is therefore defined between the rotors and the stator a gap formed by the space between the two active surfaces, including the respective blades or teeth.
La pâte à traiter circule dans les gorges définies par les dents ou lames, se retrouve dans l'entrefer du fait du mouvement sous forme de flocs, ces derniers subissant alors un traitement de broyage de par la coopération des arêtes et des surfaces des lames ou dents respectivement du rotor et du stator.The paste to be circulated in the grooves defined by the teeth or blades, is found in the air gap due to the movement in the form of flocks, the latter then undergoing a grinding treatment by the cooperation of the edges and surfaces of the blades or teeth respectively rotor and stator.
On conçoit de fait que les surfaces actives des disques en question s'usent relativement rapidement et qu'il convient donc de pourvoir de manière plus ou moins périodique à leur remplacement. En effet, les arêtes respectives des dents ou lames s'émoussent en raison de l'entrefer relativement réduit ménagé entre les disques et du passage et du broyage à ce niveau de la pâte brute triturée. Ce faisant, on réalise ces surfaces actives sur des pièces d'usure, également dénommées garnitures, fixées de façon amovible sur les plateaux des rotors et des stators constitutifs du raffineur.It is conceivable that the active surfaces of the disks in question wear out relatively quickly and that it is therefore necessary to provide more or less periodic replacement. Indeed, the respective ridges of the teeth or blades dull due to the relatively small air gap formed between the discs and passage and grinding at this level of the crushed pulp. In doing so, these active surfaces are made on wear parts, also known as gaskets, removably attached to the plates of the rotors and constituent stators of the refiner.
Les mêmes problèmes se posent en relation avec des raffineurs mettant en oeuvre d'autres formes que les disques, et notamment des surfaces coniques, ou cylindriques.The same problems arise in relation to refiners using forms other than discs, and in particular conical or cylindrical surfaces.
Traditionnellement, les garnitures sont le plus souvent réalisées en métal (acier inoxydable ou fonte). Elles sont également réalisées généralement en une seule pièce selon une forme de couronne. Elles peuvent cependant être constituées d'un assemblage de segments en forme de secteurs de couronne, rapportés notamment par boulonnage sur les plateaux des rotors et du stator.Traditionally, fittings are most often made of metal (stainless steel or cast iron). They are also generally produced in one piece in a form of a crown. They may, however, consist of an assembly of segments in the form of ring sectors, reported in particular by bolting on the plates of the rotors and the stator.
Parmi les garnitures disponibles à ce jour, on distingue tout d'abord les garnitures taillées pour lesquelles les motifs, et donc notamment les dents ou lames sont obtenues par usinage. L'avantage de la mise en oeuvre de telles garnitures réside essentiellement dans leur possible réutilisation après étape de re-taillage. En revanche, leur dureté est relativement faible, entraînant en corollaire une faible durée de vie et partant une maintenance lourde en termes de personnel et en termes de nombre d'arrêts du raffineur. De plus, le poids de la garniture est relativement élevé, rendant la garniture chère, et nécessitant pour sa manutention des outillages (palans) outre un personnel conséquent.Among the trimmings available today, there are first cut trims for which the patterns, and therefore including the teeth or blades are obtained by machining. The advantage of implementing such fittings lies essentially in their possible reuse after re-cutting step. However, their hardness is relatively low, resulting in a short life and therefore a heavy maintenance in terms of personnel and in terms of the number of refinery stops. In addition, the weight of the liner is relatively high, making the liner expensive, and requiring for its handling tools (hoists) besides a substantial staff.
On connaît également les garnitures moulées, pour lesquels les motifs sont obtenus par des procédés traditionnels de fonderie. Si la technique de la fonderie est aujourd'hui bien maîtrisée, permettant de fait de réduire les coûts de fabrication, en revanche les garnitures ainsi obtenues ne sont pas réutilisables.Molded gaskets, for which the patterns are obtained by traditional casting processes, are also known. If the foundry technique is now well controlled, allowing in fact to reduce manufacturing costs, however the fittings thus obtained are not reusable.
En outre, la dépouille en fond de denture réduit le débit de la pâte, susceptible d'induire une variation du raffinage au fur et à mesure de l'usure des dents. Qui plus est, les types de motifs des lames ou dents sont assez limités.In addition, the bottom edge of the teeth reduces the flow rate of the dough, which can induce a variation in refining as and when the wear of the teeth. What's more, the types of patterns of the blades or teeth are quite limited.
Enfin, on connaît également les garnitures de type mécano-soudé, pour lesquelles les motifs sont obtenus par assemblage de lames individuelles. Si certes, cette technique permet de disposer de lames ou dents de dureté élevée, ainsi que d'un poids de garniture relativement faible, en revanche elle présente l'inconvénient de ne pas permettre la réutilisation des pièces d'usure. Au surplus, la soudure en fond de denture réduit également, comme dans la cas précédent, le débit de la pâte, susceptible encore une fois de faire varier le raffinage au fur et à mesure de l'usure. Qui plus est, là encore les types de motifs des lames ou dents sont limités.Finally, we also know the welded type of fittings, for which the patterns are obtained by assembling individual blades. While certainly this technique makes it possible to have blades or teeth of high hardness, as well as a relatively low packing weight, however it has the disadvantage of not allowing the reuse of wear parts. In addition, the weld at the bottom of the toothing also reduces, as in the previous case, the flow rate of the dough, again likely to vary the refinement as and when the wear. What's more, again the types of patterns of the blades or teeth are limited.
La présente invention a pour objectif de pallier ces différents inconvénients, tant en termes de coût de fabrication que de simplification des opérations de maintenance.The present invention aims to overcome these disadvantages, both in terms of manufacturing cost and simplification of maintenance operations.
A cet effet, elle propose un élément de raffinage pour fibres mis en oeuvre dans un raffineur de pâte à papier ou de copeaux de bois, comportant sur sa surface active une pluralité de lames ou dents en saillie, parallèles entre elles au sein d'une même zone de ladite surface active, et destiné à être fixé sur un plateau ou support de l'une des pièces actives dudit raffineur.For this purpose, it proposes a fiber refining element used in a pulp or wood chip refiner, comprising on its active surface a plurality of protruding blades or teeth, parallel to one another within a same area of said active surface, and intended to be fixed on a plate or support of one of the active parts of said refiner.
Selon l'invention, ledit élément est constitué d'une tôle issue de laminage, découpée en fonction de la forme souhaitée de l'élément.According to the invention, said element consists of a sheet resulting from rolling, cut according to the desired shape of the element.
En d'autres termes, l'invention consiste principalement dans la mise en oeuvre, en lieu et place des techniques précédemment connues, d'une tôle laminée présentant de notables avantages notamment en termes de poids et donc de maintenance, et en termes de coûts.In other words, the invention consists mainly in the implementation, instead of the previously known techniques, of a rolled sheet having significant advantages especially in terms of weight and therefore maintenance, and in terms of costs .
Le matériau constitutif de la tôle peut être de l'acier, et notamment de l'acier inoxydable ou tout autre type d'acier. Il peut cependant être d'une autre nature, et notamment être constitué de métaux non ferreux, de matières synthétiques, etc....The constituent material of the sheet may be steel, including stainless steel or any other type of steel. It may, however, be of a different nature, and in particular be made of non-ferrous metals, synthetic materials, etc.
La notion de parallélisme des dents ou lames n'implique pas nécessairement que lesdites lames soient linéaires. Elles peuvent en effet adopter des profils très variés, tels que par exemples radiaux, curvilignes, en zig zag, etc...The notion of parallelism of the teeth or blades does not necessarily imply that said blades are linear. They can indeed adopt very varied profiles, such as for example radial, curvilinear, zigzag, etc ...
Avantageusement, après réalisation des dents ou lames par usinage, l'élément, lorsqu'il est réalisé en acier, subit une étape de traitement thermique spécifique, permettant d'augmenter significativement la dureté de la surface active, jusqu'à atteindre voire dépasser celle susceptible d'être obtenue par technologie de fonderie d'acier inoxydable et notamment des duretés voisines de 50 à 60 HRC.Advantageously, after making the teeth or blades by machining, the element, when made of steel, undergoes a specific heat treatment step, making it possible to significantly increase the hardness of the active surface, until it reaches or even exceeds that likely to be obtained by stainless steel foundry technology and in particular hardnesses close to 50 to 60 HRC.
L'élément de raffinage pour fibres de l'invention est susceptible d'être mis en oeuvre au sein d'un raffineur à disques, d'un raffineur conique ou d'un raffineur cylindrique.The fiber refining element of the invention is capable of being used in a disc refiner, a conical refiner or a cylindrical refiner.
Dans une forme particulière de réalisation de l'invention, le raffineur est un raffineur à disques, et comporte respectivement deux stators et deux rotors, l'élément de raffinage de l'invention étant alors constitué d'une couronne circulaire.In a particular embodiment of the invention, the refiner is a disc refiner, and comprises respectively two stators and two rotors, the refining element of the invention then consisting of a circular ring.
Selon l'invention, cette couronne circulaire n'est pas montée directement sur le plateau des rotors et des stators, mais sur un élément intercalaire également dénommé sous l'expression anglo-saxonne «spacer », propre à compenser le différentiel d'épaisseur des éléments de garniture de l'art antérieur, outre à régler l'entrefer entre le rotor et le stator. Ainsi, les disques du raffineur à disques sont chacun constitués de l'empilement d'un plateau - support, du « spacer », et de la couronne circulaire.According to the invention, this circular ring is not mounted directly on the plate of the rotors and the stators, but on an intermediate element also known under the English expression "spacer ", suitable to compensate for the difference in thickness of trim elements of the prior art, in addition to adjusting the air gap between the rotor and the stator. Thus, the disks of the disc refiner each consist of the stack of a support plate, the "spacer", and the circular crown.
Selon l'invention, la couronne circulaire peut être divisée en deux demi disques, voire en une pluralité de secteurs de couronne, également obtenus à partir de tôles laminées en acier, et rapportés sur le spacer par boulonnage.According to the invention, the circular ring may be divided into two half-disks or even a plurality of ring sectors, also obtained from rolled steel sheets, and attached to the spacer by bolting.
La manière dont l'invention peut être réalisée et les avantages qui en découlent ressortiront mieux de l'exemple de réalisation qui suit, donné à titre indicatif et non limitatif à l'appui des figures annexées.The manner in which the invention can be realized and the advantages which result therefrom will emerge more clearly from the exemplary embodiment which follows, given by way of indication and not limitation, in support of the appended figures.
La figure 1 est une représentation schématique en perspective d'un disque de raffinage conforme à l'invention, dont la figure 2 est une vue en éclaté.
La figure 3 est une vue du dessus de l'élément de raffinage de l'invention.Figure 1 is a schematic perspective view of a refining disc according to the invention, Figure 2 is an exploded view.
Figure 3 is a view from above of the refining element of the invention.
On a représenté en relation avec la figure 1 un disque de raffinage conforme à l'invention, destiné à être mis en oeuvre au sein d'un raffineur pour pâte à papier.FIG. 1 shows a refining disk according to the invention, intended to be used in a refiner for paper pulp.
Fondamentalement, celui-ci comporte le plateau (1) du disque, fixe ou mobile, selon qu'il s'agisse d'un stator ou d'un rotor.Basically, it comprises the plate (1) of the disk, fixed or mobile, depending on whether it is a stator or a rotor.
Sur ce plateau, est monté un élément intercalaire également dénommé « spacer » (2), destiné, comme mentionné supra, à compenser la perte d'épaisseur et en outre à permettre le serrage des disques en vis-à-vis du raffineur, c'est-à-dire à permettre le réglage de l'entrefer entre les dents respectives du rotor et du stator.On this plate, is mounted an intermediate element also called "spacer" (2), intended, as mentioned above, to compensate for the loss of thickness and further to allow the clamping discs vis-à-vis the refiner, c that is to say to allow the adjustment of the gap between the respective teeth of the rotor and the stator.
Une fois mis en place, cet élément intercalaire (2) n'est plus démonté du raffineur et demeure sur le plateau (1).Once in place, this intermediate element (2) is no longer removed from the refiner and remains on the plate (1).
Enfin, on a représenté par la référence (3) la pièce d'usure, c'est-à-dire l'élément de garniture conforme à l'invention. Celle-ci dans l'exemple décrit est constituée d'une couronne circulaire, co-axiale avec d'une part le spacer (2) et d'autre part le plateau (1) du rotor ou du stator, et sensiblement de même dimension périphérique.Finally, there is shown by reference (3) the wear part, that is to say the packing element according to the invention. This in the example described consists of a circular ring, coaxial with firstly the spacer (2) and secondly the plate (1) of the rotor or stator, and substantially of the same size peripheral.
Selon une caractéristique de l'invention, cette garniture (3) est réalisée à partir d'une tôle en acier inoxydable issu de laminage.According to a characteristic of the invention, this lining (3) is made from a stainless steel sheet obtained by rolling.
Cette tôle est découpée par des procédés classiques et notamment laser, puis est usinée par des programmes d'usinage identiques à ceux mis en oeuvre pour la réalisation des garnitures de l'art antérieur. Cet usinage est destiné à définir sur la surface active (4) de la garniture (3), c'est à dire sur la surface faisant face au disque antagoniste, un certain nombre de dents ou lames (5), formant saillies par rapport à ladite surface active.This sheet is cut by conventional methods and in particular laser, and is machined by machining programs identical to those used for producing the fittings of the prior art. This machining is intended to define on the active surface (4) of the lining (3), that is to say on the surface facing the opposing disk, a number of teeth or blades (5), forming protrusions with respect to said active surface.
Ces lames ou dents (5) sont orientées parallèlement les unes aux autres au sein d'une même zone (6) de la surface active de la garniture, ainsi qu'on peut bien l'observer sur les différentes figures.These blades or teeth (5) are oriented parallel to each other within the same area (6) of the active surface of the liner, as can be seen in the various figures.
La garniture (3) est fixée sur le spacer (2) par boulonnage (7), là encore de manière traditionnelle.The lining (3) is fixed on the spacer (2) by bolting (7), again in a traditional manner.
Selon une caractéristique avantageuse de l'invention, une fois l'usinage des dents ou lames (5) réalisé sur la couronne en tôle laminée, et préalablement au boulonnage de cette dernière sur le spacer (2), elle subit une étape de traitement thermique spécifique.According to an advantageous characteristic of the invention, once the machining of the teeth or blades (5) made on the rolled sheet crown, and prior to the bolting of the latter on the spacer (2), it undergoes a heat treatment step specific.
Ce faisant, on augmente significativement la dureté de la garniture (3), et donc corollairement la durée de vie de cette pièce d'usure, permettant ainsi un espacement des opérations de maintenance.In doing so, the hardness of the lining (3) is significantly increased, and therefore the service life of this wear part, thus allowing a spacing of the maintenance operations.
Au surplus, et indépendamment de cette étape de traitement thermique spécifique, en raison de la mise en oeuvre de la technique de laminage d'une tôle permettant d'aboutir à la garniture en question, on dispose d'une résistance accrue de la structure en raison de la meilleure micro-structure métallurgique du produit laminé en comparaison aux produits obtenus par voie de fonderie.In addition, and independently of this specific heat treatment step, because of the implementation of the rolling technique of a sheet to achieve the lining in question, it has an increased strength of the structure in because of the better metallurgical micro-structure of the rolled product compared to products obtained by casting.
En raison même du procédé mis en oeuvre, le laminage, on diminue de manière drastique les coûts de fabrication, puisque aussi bien, on s'affranchit de la mise en oeuvre d'ébauches de fonderie outre de l'étape d'écroûtage de la pièce résultant de fonderie.Because of the process used, rolling reduces the manufacturing costs drastically, since, as well, it avoids the implementation of foundry blanks off the peeling step of the resulting piece of foundry.
Au surplus, notamment lors de la mise en oeuvre d'une couronne entière circulaire, il n'existe plus de jeu entre les différents segments susceptibles de constituer les garnitures ou pièce d'usure, telles que décrites en relation avec le rappel de l'état antérieur de la technique.In addition, especially when implementing a circular ring, there is no clearance between the various segments that may constitute the lining or wear part, as described in connection with the recall of the prior art.
En outre, en raison de sa masse réduite, en moyenne de 50% à 70% par rapport aux garnitures traditionnelles, les opérations de maintenance s'en trouvent largement facilitées, puisque le poids de cette pièce d'usure n'est plus un problème.In addition, because of its reduced mass, on average from 50% to 70% compared to traditional liners, maintenance operations are greatly facilitated, since the weight of this wear part is no longer a problem .
Claims (10)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0655052A FR2908791B1 (en) | 2006-11-22 | 2006-11-22 | REFINING ELEMENT FOR FIBERS, IN PARTICULAR PAPERS AND REFINERY USING SUCH A MEMBER |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1925722A1 true EP1925722A1 (en) | 2008-05-28 |
Family
ID=38283194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07301372A Withdrawn EP1925722A1 (en) | 2006-11-22 | 2007-09-17 | Refining element for refining fibres, in particular papermaking fibres, and refiner with such a refining element |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1925722A1 (en) |
| FR (1) | FR2908791B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2063019A1 (en) | 2007-11-23 | 2009-05-27 | Officine Airaghi Srl | Process for making conical spare parts for refiners for the production of paper |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109736122B (en) * | 2019-03-15 | 2020-07-03 | 河南工学院 | Transformer insulator processing equipment |
| RU209684U1 (en) * | 2021-10-22 | 2022-03-18 | Федеральное государственное бюждетное образовательное учреждение высшего образования "Уральский государственный лесотехнический университет" | Attachment device for disc mill headset |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4951888A (en) * | 1989-08-24 | 1990-08-28 | Sprout-Bauer, Inc. | Refining element and method of manufacturing same |
| US6053440A (en) * | 1999-03-02 | 2000-04-25 | Beloit Technologies, Inc. | Tangential discharge disk refiner |
| DE202004001620U1 (en) * | 2004-02-04 | 2004-04-08 | Voith Paper Patent Gmbh | Grinding sets for paper pulp |
| WO2004054717A2 (en) * | 2002-12-13 | 2004-07-01 | Voith Paper Patent Gmbh | Method for producing fittings for mechanically processing paper stock containing water |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4620675A (en) * | 1983-09-07 | 1986-11-04 | Beloit Corporation | Composite flexible pulp refiner disk |
| WO2004067178A1 (en) * | 2002-02-07 | 2004-08-12 | Kee-Met, Ltd. | Method of manufacturing refiner elements--. |
-
2006
- 2006-11-22 FR FR0655052A patent/FR2908791B1/en active Active
-
2007
- 2007-09-17 EP EP07301372A patent/EP1925722A1/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4951888A (en) * | 1989-08-24 | 1990-08-28 | Sprout-Bauer, Inc. | Refining element and method of manufacturing same |
| US6053440A (en) * | 1999-03-02 | 2000-04-25 | Beloit Technologies, Inc. | Tangential discharge disk refiner |
| WO2004054717A2 (en) * | 2002-12-13 | 2004-07-01 | Voith Paper Patent Gmbh | Method for producing fittings for mechanically processing paper stock containing water |
| DE202004001620U1 (en) * | 2004-02-04 | 2004-04-08 | Voith Paper Patent Gmbh | Grinding sets for paper pulp |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2063019A1 (en) | 2007-11-23 | 2009-05-27 | Officine Airaghi Srl | Process for making conical spare parts for refiners for the production of paper |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2908791B1 (en) | 2008-12-26 |
| FR2908791A1 (en) | 2008-05-23 |
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