EP0754259B1 - Garniture pour raffineur - Google Patents

Garniture pour raffineur Download PDF

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Publication number
EP0754259B1
EP0754259B1 EP95916728A EP95916728A EP0754259B1 EP 0754259 B1 EP0754259 B1 EP 0754259B1 EP 95916728 A EP95916728 A EP 95916728A EP 95916728 A EP95916728 A EP 95916728A EP 0754259 B1 EP0754259 B1 EP 0754259B1
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EP
European Patent Office
Prior art keywords
coating
refining
filling according
refiner
pulp
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Expired - Lifetime
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EP95916728A
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German (de)
English (en)
French (fr)
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EP0754259A1 (fr
Inventor
Yves Garnier
Guy Caucal
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ARTE
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ARTE
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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 filling for a dough refiner such as a refiner. pulp, a refiner comprising at least one such filling, a process for preparation of this filling and a refining process in which we use minus such a garnish.
  • Pulp refiners have a rotor and a stator between which the raw material is defibrated and fibrillated.
  • disc refiners There are two main categories of refiners: disc refiners and conical refiners.
  • Disc refiners typically include one or more rotors and a or several stators each consisting of a support disc on which is mounted a another disc called a refining disc, the role of which is both to protect the disk supporting erosion by the raw material to be refined and participating in refining of the latter.
  • the raw material can be introduced through the center of at least one of the refining discs, in the space between the two refining discs and flow towards their periphery. It can also be introduced at the level of the periphery of the discs and come out through the center of the discs.
  • the dough undergoes a treatment which modifies significantly the physical properties of the fibers in the pulp and then allows the paper made from treated pulp to possess the characteristics necessary for use for which it is intended.
  • the refining discs include generally a fixing face 1 on the refiner and a working face 2 comprising an alternation of grooves 3 and projections called blades 4.
  • the surface active 5 of these blades 4 gradually wears out during refining, so that periodically shut down the refiner and replace the refining discs.
  • FIG. 1 Currently used as refining discs, discs which have a complete annular shape and which are cast in one piece, as a torus-shaped element (FIG. 1), ie disks, illustrated in FIG. 3, composed of several segments 6 and which together form a ring.
  • Conical refiners generally include a rotor 7 represented on Figures 4, and 5 of conical or frustoconical shape, and a stator 8, shown in the Figures 6 and 7, also conical or frustoconical.
  • Cones or trunks of refining cone 9 and 10 are mounted, respectively, on the outer surface 11 of the rotor 7 and on the inner surface 12 of the stator 8.
  • These cones or truncated cones of 9,10 refining can be composed, respectively, of 13,14 segments. They have alternating grooves and blades (not shown) and they play the same role as the refining discs mentioned above.
  • the raw material is introduced between the stator and the refiner's rotor, at the top of the cone or trunk cone constituting the rotor and comes out at the base of this same cone or trunk of cone.
  • the refining discs or cones must be resistant to wear, they generally consist of a metal or a metal alloy having a high hardness.
  • German patent application No. DE-A-1 621 703 proposes a seal metal for refiner at least the active surface of which is covered by a coating in wear-resistant material.
  • Patent application EP-A-0634522 belongs to the state of the art referred to Article 53 (4) EPC which is not taken into account for the assessment of the activity inventive.
  • Patent application EP-A-0634522 relates to a defibration plate or paper pulp refining, comprising a grinding surface having ribs separated by grooves.
  • the body of the plate is made of a first material such as stainless steel or cast iron, ensuring the general mechanical strength of the plate in use.
  • the upper part of the ribs is made of a layer of abrasion-resistant material comprising grains of hard abrasion-resistant material bonded in an alloy metallic whose melting and weldability characteristics are suitable for laser reloading on the first material forming the plate body.
  • the ribs are successively recharged by scanning a laser beam and a spray nozzle, in one or more passes.
  • This trim has a face of attachment to the refiner, a working face, at least one core of a material rigid, covered by a coating of a wear-resistant material, such so that at least the active surface of the lining is made up of all or part of the exterior surface of said coating and is distinguished from the linings of the state of the technique in that said coating is porous and consists of a superposition of layers thin or strips.
  • Such a lining has a higher wear resistance than the linings known so far.
  • it may include a core made of a rigid material little expensive, such as a recovery material.
  • the refined dough obtained has, for the same specific power consumed, a length average fiber and whiteness superior to that of pasta obtained in a refiner provided with fittings according to the state of the art.
  • Figures 1 and 2 schematically represent a refining disc according to the state of the art, respectively in front view and in side view in section according to axis A-A.
  • FIG. 3 schematically represents a second refining disc according to the state of the art.
  • Figures 4 and 5 schematically represent a conical refiner rotor equipped with refining cones according to the state of the art, respectively with a view to face in cross section along axis B-B and in right view.
  • Figures 6 and 7 schematically represent a conical refiner stator exhausted from refining cones according to the state of the art, respectively with a view to face in cross section along axis C-C, and in left view.
  • Figures 8 and 9 show a packing according to the invention, respectively in front view and in bottom view.
  • Figure 10 shows schematically in section, the packing of Figures 8 and 9 in bottom view in section according to D-D.
  • Figures 11 and 12 schematically represent a first variant of the lining according to the invention, respectively in front view and in bottom view in section along the E-E axis.
  • Figure 13 shows schematically in section, a second variant of the lining according to the invention.
  • Figure 14 shows schematically in section, a third variant of the lining according to the invention.
  • Figures 15 and 16 schematically represent a fourth variant of the lining according to the invention, respectively in front view and in bottom view in section along the axis F-F.
  • Figure 17 shows schematically in section, a fifth variant of the lining according to the invention.
  • Figure 18 shows schematically in section, a sixth variant of the packing according to the invention.
  • Figures 19 and 20 schematically represent a seventh variant of the lining according to the invention, respectively in front view and in bottom view in section along the axis G-G.
  • Figure 21 shows schematically in section, an eighth variant of the lining according to the invention.
  • Figure 22 shows schematically in perspective a lining according to the invention intended to be mounted on a conical refiner rotor block.
  • Figure 23 shows schematically in perspective a lining according to the invention intended to be mounted on a stator block of a conical refiner.
  • FIG. 24 represents the weighted length curve of the fibers of a raw material before refining.
  • FIG. 25 represents the weighted length curve of the fibers of a pulp obtained after refining with discs according to the state of the art.
  • FIG. 26 represents the weighted length curve of the fibers of a pulp obtained after refining with fillings according to the invention.
  • Figure 27 shows another weighted fiber length curve a paste obtained after refining with fillings according to the invention.
  • the fixing face and the working face of a gasket according to the invention are, respectively, the side intended to be fixed against the disc or support cone of the refiner, and the face intervening directly during the refining of the dough.
  • active surface is meant in the description of the invention, only the surface of the filling furthest from the fixing face and against which the dough will be refined (fibrillated).
  • the active surface can occupy the entire working face of the packing: this is the case, in particular, when the working face is flat.
  • the surface active can also represent only part of the working face, for example, when the latter has places, such as grooves, where the dough is not fibrillated.
  • the active surface of a lining according to the invention is always constituted by all or part of the exterior surface of the coating.
  • exterior surface of the coating is meant the surface which is opposite to the surface of the coating in contact with the core.
  • the outer surface coating therefore always includes at least the active surface of the lining.
  • the active surface is always constituted by the material resistant to wear and tear of the coating.
  • the extent of the exterior surface of the coating may not be limited to the active surface of the lining.
  • the coating is not present only on the working face which it therefore occupies at least in part.
  • This coating is preferably continuous and of uniform thickness at the level of the entire active surface. His thickness is generally between 0.1 and 2 mm, preferably between 0.5 and 0.8 mm.
  • the rigid material from which the core of the lining is made is a material having mechanical properties, in particular of compressive strength, allowing it not to break, when the rotor and the stator are close to each other, and do not tear off and be carried away by the flow of raw material during refining. It can be a metal, a metal alloy, cast iron, a plastic material having good mechanical properties, including shear strength sufficient, such as so-called "high performance" plastics, which may be mentioned polyamides 4-6, polyamide imides, or technical polymers such as polyamide 6-6.
  • the rigid material can also be a composite material such as epoxy / carbon fiber, epoxy / glass fiber, or vinyl ester / fiber carbon. It goes without saying that the choice of rigid material also depends on its resistance to the process chosen to apply the coating.
  • the rigid material can be an inexpensive recovery material such as a metal or metal alloy recovery or a plastic material made from recycled polymers having the mechanical characteristics mentioned above.
  • the linings according to the invention may comprise a core made up of a material which is not very resistant to wear, because the core does not have an active surface and has not intended to resist wear.
  • the wear-resistant material constituting the coating is preferably a different material from that of which the core is made. It must be able to adhere to the latter in a sufficiently firm manner so as not to be torn off and carried away by the flow of raw material during refining.
  • It can be a pure metal such as molybdenum (Mo), nickel (Ni), aluminum (Al), copper (Cu), tantalum (Ta) or titanium (Ti), a metal alloy such as nickel-chromium (NiCr), nickel-chromium-aluminum-yttrium (NiCrAlY), nickel-chromium-iron-boron-silicon (NiCrFeBSi), nickel-aluminum (NiAl) or copper-aluminum (CuAl), a pseudo-alloy such as aluminum-molybdenum (Al-Mo) or copper-tungsten (Cu-W), a cermet such as WC-Co, Cr 3 C 2 -NiCr, WC-Ni or WC-NiCr, a ceramic such as alumina (Al 2 O 3 ), chromium oxide (Cr 2 O 3 ), titanium oxide (TiO 2 ), zirconia (ZrO 2 ), oxide zi
  • the coating is a mixture of these materials, or a superposition of layers made up of different materials chosen among these materials.
  • a ceramic is used as coating, in particular alumina.
  • Porous coating means a coating with a ratio of total pore volume to total coating volume between 2% and 50%, preferably between 10% and 30%.
  • the porosity increases from the surface of the coating in contact with the core up to the active surface.
  • Such a porosity gradient allows both good adhesion of the coating to the core and better refining paste.
  • the porosity can thus be zero in contact with the core and close to 50% at level of the active surface.
  • the porosity is advantageously of the open type. Indeed, this seems cause a capillary effect with respect to the water contained in the dough being refining and beneficially modifying the circulation of the dough and its refining.
  • the coating may include a second material disposed between the material wear-resistant and core, so as to cover it and protect it from corrosion by the raw material to be refined which could pass through the coating, if this coating is porous.
  • the core is made of a metal or an oxidizable alloy.
  • Said second material is preferably in the form of a layer thin, between about 20 and about 200 microns thick (micrometers ⁇ m) and preferably between about 50 and about 100 microns, ranging from preferably at least on the entire working face.
  • the choice of this second material depends on the physico-chemical conditions under which the packing will be brought to to work.
  • Said second material can be, for example, an oxide of nickel and chromium. It turned out that the alloy composed of nickel, chromium, aluminum and yttrium (NiCrAlY), provided excellent protection against the phenomena of corrosion.
  • the packing according to the invention When the packing according to the invention is intended to be used in a disc refiner, it can have the shape of a ring or a washer like the refining rings or washers of the state of the art represented by FIG. 1, or the shape of a disc segment like segments 6 in Figure 3.
  • the packing according to the invention When the packing according to the invention is intended to be mounted on a conical refiner, it can have a cone or truncated cone shape or a shape of segment of cone or truncated cone, like those illustrated by the figures 22 and 23.
  • the lining according to the invention as illustrated in FIGS. 8 and 9, comprises a core 15 of a rigid material comprising a fixing face 16 on the refiner and a working face 17 at least essentially flat.
  • the active surface 18 of the seal extends over the entire working face 17.
  • a coating 19 made of a wear-resistant material covers said core 15, so that at least the entire active surface 18 of the lining is made of wear-resistant material. So the fibrillation action of the dough is only performed on the wear-resistant material and not on the core 15.
  • the coating 20 consists of at least at least two thin layers or lamellae 21 arranged one on top of the other, preferably, at least essentially parallel. These strips 21 allow more uniform wear of the coating 20 and thus contribute to the constancy of the refining conditions. Preferably, the number of lamellae 21 is the highest possible that the technique used to achieve the coating allows to achieve. Of tests have shown that when the coating consists of only one layer, it could be easily torn off when the rotor was brought closer to stator. The slats give the coating a special wear capacity which allows the toppings to adapt to the refiner. In the case of a disc refiner, for example, the discs are never in practice perfectly parallel.
  • the working face 22 of the lining is provided with one or more alternating grooves 23 with one or more blades 24.
  • Said grooves 23 are intended to facilitate the flow of the dough. They can be of any section. They can in particular have a section rectangular like those found on the refining discs of the trade. They are present in the coating 25 which extends over the entire face of work 22. The active surface of the lining is then the sum of the surfaces of all vertices 26 of the blades 24. The area of the active surface is therefore less than the area of the working face 22.
  • the geometry of the blades 24 and grooves 23 can be chosen by depending on the type of specific treatment you want to subject the material to refine. The geometry / material pair of said coating 25 can be optimized for each specific treatment of the material to be refined.
  • the grooves 27 are present in the core 28 and the coating 29 covers only the vertices 30 of the blades 31.
  • the rigid material constituting the core 28 is a material having a fairly good resistance to wear, such as "Ni-hard” type cast iron or chrome steels. The latter also the advantage of having good resistance to corrosion.
  • the grooves 32 are present in the core 33 and the coating 34 occupies the entire face of work 35.
  • the covering 34 preferably matches all the shapes of the core 33. It is therefore placed both on the vertices 36 of the blades 37 and on their bottoms 38. Its thickness is preferably uniform on all the vertices 36.
  • the coating 34 can also be composed of several parts made up each of a different material.
  • said first material is then chosen from among the materials with high wear resistance and / or good properties tribological materials such as alumina and said second material is chosen from materials with high abrasiveness such as tungsten carbide and / or resistance high corrosion.
  • one or more obstacles 39 are arranged in one or more grooves 40, so to achieve one or more throttles and to disturb the circulation of the dough by creating micro-vortexes inside the grooves 40, which has the effect of forcing the material to be refined to pass between the active surfaces of the rotor and the stator. The refining quality is then improved.
  • Said obstacles 39 can be arranged randomly or in groups of two and located opposite one another, respectively on the walls 41 and 42 of the grooves 40.
  • the obstacles located on the wall 41 can also be offset with respect to to those located on the wall 42.
  • Obstacles are preferably made of the same material as the coating 43 with which they are integral.
  • the obstacles 39 are preferably made of said second material.
  • the obstacles 45 are arranged in the bottoms or on the walls of the grooves 46. As the covering 47 covers only the vertices 48 of the blades 49, the obstacles 45 are therefore in contact and adhere to the core 50. They can also be part of the core 50 and therefore be made of the same material as this core 50.
  • the core 51 is provided with grooves 52.
  • the covering 53 covers the entire working face 54.
  • the obstacles 55 are therefore fixed against the covering 53 or form part of the latter which preferably follows all the shapes of the core 51 and preferably has a uniform thickness over the entire working face 54.
  • Figures 19 and 20 show a seventh advantageous variant of the packing according to the invention, in which the grooves 56 have a quasi-circular section.
  • Such fittings thus have a high active surface (constituted by the sum of the surfaces of the vertices 57 covered by the coating 58), while having grooves 56 which may contain a large volume of dough during the refining.
  • FIG. 21 represents an eighth advantageous variant of the lining according to the invention, in which the coating 59 covers the entire working face and the grooves 60 have a dovetail shape, which is another way to achieve a high active surface while having grooves 60 in volume important.
  • the lining according to the invention has grooves, it can be envisaged for these grooves a variable depth.
  • the latter can, for example, be weak at one end (for example, the periphery for a trim annular), and increase, preferably regularly, to become important in level of the other end (the center, for an annular packing), or vice versa.
  • the choice between increasing the depth towards one end, or increase towards the other of the extremities, will then depend on the characteristics of operation of the refiner, in particular, the direction imposed on the circulation of the dough in the refiner.
  • Figures 22 and 23 show fittings according to the invention intended for be implemented respectively on the rotor and on the stator of a refiner conical. During the operation of the latter, the raw material is fibrillated between the coatings 61 and 62 of the linings which are pressed against each other.
  • the packing according to the invention and its variants are intended to be fixed, in known manner, on the rotor block or on the stator block of a refiner. That is why they may include one or more holes (not shown), passing through the core and optionally the covering by connecting the working face to the fixing face, and intended for the passage of fixing screws on the rotor block or the stator block of the refiner.
  • the linings according to the invention can advantageously be prepared for starting from a core of a rigid material which is covered at least partially with using a wear-resistant coating, in such a way that at least the surface active lining is formed by all or part of the outer surface of said coating.
  • the recovery is carried out according to any process allowing to deposit a hard coating on a substrate, such as, for example, the process called "laser-cladding", the process of plasma deposition by thermal spraying, the process of Induction plasma deposition, or the C.V.D. Vapor Deposition).
  • the core is preferably provided with grooves which can be practiced by machining in a flat core, or else provided during the molding of the core, especially in the case where it is more economical to manufacture the latter by molding.
  • the core can advantageously be a disc or a disc segment of commercial refining, or a cone, truncated cone or segment of a cone or trade refined cone trunk. Then preferably apply the coating of wear-resistant material so that all forms of the disc, disc segment, cone, trunk of cone or segment of cone or trunk of cone of commerce are kept.
  • the coating can completely cover the core, i.e. its working face as well as its fixing face or its lateral faces.
  • the coating when the coating is present in the grooves (first, third, fourth, sixth and eighth variants), and if this coating is abrasive, the turbulent nature of the flow is increased, which results in better maintenance of the dough film between the rotor and the stator of the refiner, for better refining and better management of the entire refining operation.
  • the core with the coating of wear-resistant material by implementing the so-called plasma removal process. Indeed, we obtain thus, when the core has grooves, a continuous coating of uniform thickness and fitting well to all forms of the working face. In addition, like grains forming the starting material have at least partially melted when passing through flame, the coating obtained is in a continuous, uniform form and relatively high density.
  • the plasma deposition process proves to be particularly advantageous to make a coating composed of a superposition or stack of layers thin or strips.
  • this process makes it possible to deposit the coating in several passes, each time depositing a very small amount of the material resistant to wear, so as to obtain a coating consisting of a superposition of thin layers or coverslips. Such a coating then wears uniformly and has a surface with maximum flatness throughout its wear.
  • the thickness of the slats can thus be between 0.003 and 0.100 mm. It is preferably between 0.005 and 0.025 mm.
  • Another advantage of implementing the plasma deposition process is that can use a sophisticated and expensive material as a coating because this process allows to deposit thin layers of material, so a small amount of material, which does not lead to a significant increase in the cost price of the garnish.
  • the starting material for the implementation of the plasma process presents generally a particle size between about 10 and about 80 microns ( ⁇ m) and preferably between about 30 and about 40 microns ( ⁇ m).
  • the obstacles shown in FIGS. 16, 17 and 18 can be arranged by the plasma process.
  • the packing according to the invention is fixed in a known manner, for example to the screw means, on the rotor block or the stator block of the refiner.
  • the Applicant has noticed that the implementation of the linings according to the invention makes it possible to keep a constant air gap during refining even when the refining power is very high, which has the advantage of leading to a stable refining conditions and maintaining the quality of the refined dough in time.
  • the refined dough has a whiteness greater than that obtained with the linings according to the state of the art.
  • the lining according to the invention can be fixed on the rotor block or on the block stator of the refiner. Preferably, it covers the entire working face of the rotor block or the stator block. Thus, the entire active surface of the block has a coating of wear-resistant material.
  • trims of dimensions equal or different on the rotor block or on the stator block, in particular, if we wishes to cover the entire working face of the rotor or stator and that the dimensions a single trim are insufficient to allow it to occupy on its own all the working face of the rotor block or the stator block.
  • both the rotor and the stator of the refiner are provided with one or more several fittings according to the invention. It is even more preferable to cover the entire working face of the rotor block and the entire working face of the stator block of one or several linings according to the invention, so that the entire active surface of the refiner is made of wear-resistant material. We then obtain a flow of the dough to be refined having maximum turbulence and refining optimal.
  • the linings according to the invention can be used with a view to defibering and / or refining any material composed of fibers, such as pulp, and in particular, paper pulp whose dry matter concentration is less than 60% and preferably less than 25%. They are particularly revealed effective when the pulp to be refined is an aqueous suspension whose concentration is between 3 and 8%.
  • the linings according to the invention make it possible to obtain better results, in regarding the cutting of fibers (less cutting phenomena), than state of the art fittings. It is therefore advantageous to use them in the paper recycling industry. Because they can be used to refine old paper, that is to say improve its quality, they make possible a reduction in the content of long (new) fibers in recycled paper. Of more, they improve the dispersion of "stickies", the impurities of the paper, which produces paper with fewer dark spots. So we get, thanks to the linings according to the invention, a lowering of the cost of recycling.
  • fittings according to the invention can be used to produce on disc refiners refining operations that were previously practically possible only on conical refiners, more particularly on wide angle conical refiners.
  • refining operations are those necessary for the preparation of special paper such as cigarette papers, tracing papers, etc ..., i.e. papers obtained from degree pulp High Shopper-Riegler (over 60 degrees).
  • the linings according to the invention can also be used for the defibration of any cellulosic material, such as wood waste, so-called "annual" plants (bagasse, sorghum, alfa, ).
  • the refining of a paper pulp was carried out under the same conditions, with 4 metal discs according to the prior art and with 4 fillings according to the invention.
  • the discs according to the state of the art were 40.64 cm (16 inch) diameter crowns marketed by the company Black-Clawson, made of "Ni-hard” cast iron having 10 sectors, tops of blades of a width of about 5.5 mm, and grooves parallel to each other within each sector, inclined by about 20 ° with respect to the radius, of rectangular cross section, about 5.0 mm in width and d '' about 6.0 mm deep.
  • the linings according to the invention were linings prepared by the plasma spraying deposition process, covering with a uniform or approximately uniform thickness of approximately 500 ⁇ (microns) of alumina / titanium oxide 97/3 (Al 2 O 3 97% -TiO 2 3%) the entire working face of crowns identical to those described above.
  • the coating consisted of a superposition of 25 thin layers 20 ⁇ m thick each.
  • the porosity was of the open type and equal to 20% (measured according to the alcohol penetration test).
  • the refiner used was the Twin Midjet refiner marketed by the company Black-Clawson, comprising 4 support discs and working in duo-flow, that is to say that the 4 support discs are arranged parallel to each other and a part (theoretically half) of the raw material is refined between 2 refining discs of a first game and the other part between 2 refining discs of a second game.
  • the introduction of the raw material was done in the center of the refining discs.
  • the refiner was equipped with a 140 kW engine.
  • the nominal circulation rate of the pulp was 30 to 40 m 3 / h, the maximum flow being 60 m 3 / h.
  • the raw material had a concentration of 3% and consisted of Scandinavian softwood chemical pulp.
  • Figure 24 represents the weighted length curve of the fibers and of the elements making up the raw material.
  • the average fiber length measured by an optical sensor was 2.49 mm.
  • the mass percentage of fibers as a function of their length is indicated above the curve.
  • LR 0 is the breaking length calculated from the breaking force with adjoining jaws while LR is the breaking length according to AFNOR Q03004 standard.
  • the column '° SR' indicates the Schopper-Riegler degree of the refined dough. Refining time (min) Weight (g / m 2 ) NFQ03 -019 Thickness ( ⁇ m) NFQ03 -016 ° SR NFQ50 -003 AND INV. AND INV. AND INV.
  • Figure 25 shows the weighted length curve of fibers and components of the dough after refining for 20 minutes with the discs according to the state of the art, and with a useful power of 40 kW.
  • the average length of fibers was 1.55 mm.
  • Figure 26 shows the weighted length curve of fibers and components of the dough after refining for 20 minutes with the fillings according to the invention, also with a power of 40 kW.
  • the average length of fibers was 2.66 mm.
  • Figure 27 shows the weighted length curve of fibers and components of the dough after refining for 25 minutes with the fillings according to the invention, with a power of 60 kW.
  • the average fiber length was 2.18 mm.

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  • Paper (AREA)
  • Surgical Instruments (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Compounds Of Unknown Constitution (AREA)
  • Noodles (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
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EP95916728A 1994-04-08 1995-04-07 Garniture pour raffineur Expired - Lifetime EP0754259B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9404667 1994-04-08
FR9404667A FR2718469B1 (fr) 1994-04-08 1994-04-08 Garniture pour raffineur de pâte.
PCT/FR1995/000452 WO1995027822A1 (fr) 1994-04-08 1995-04-07 Garniture pour raffineur

Publications (2)

Publication Number Publication Date
EP0754259A1 EP0754259A1 (fr) 1997-01-22
EP0754259B1 true EP0754259B1 (fr) 1998-09-02

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EP95916728A Expired - Lifetime EP0754259B1 (fr) 1994-04-08 1995-04-07 Garniture pour raffineur

Country Status (9)

Country Link
US (1) US5836525A (sv)
EP (1) EP0754259B1 (sv)
JP (1) JPH10506686A (sv)
AT (1) ATE170578T1 (sv)
AU (1) AU2311395A (sv)
DE (1) DE69504490T2 (sv)
FI (1) FI108868B (sv)
FR (1) FR2718469B1 (sv)
WO (1) WO1995027822A1 (sv)

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CN104343034A (zh) * 2014-10-30 2015-02-11 臧田良 磨浆机磨盘磨片

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DE19955009C2 (de) * 1999-11-16 2001-10-18 Voith Paper Patent Gmbh Verfahren zur Herstellung von Garnituren für das mechanische Bearbeiten von suspendiertem Faserstoffmaterial
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DE69504490D1 (de) 1998-10-08
WO1995027822A1 (fr) 1995-10-19
FI964013A0 (sv) 1996-10-07
FR2718469B1 (fr) 1996-03-29
AU2311395A (en) 1995-10-30
FI108868B (sv) 2002-04-15
JPH10506686A (ja) 1998-06-30
FR2718469A1 (fr) 1995-10-13
US5836525A (en) 1998-11-17
EP0754259A1 (fr) 1997-01-22
DE69504490T2 (de) 1999-05-12
FI964013A (sv) 1996-10-07
ATE170578T1 (de) 1998-09-15

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