NO180241B - Device for processing particle mass - Google Patents

Device for processing particle mass Download PDF

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Publication number
NO180241B
NO180241B NO944847A NO944847A NO180241B NO 180241 B NO180241 B NO 180241B NO 944847 A NO944847 A NO 944847A NO 944847 A NO944847 A NO 944847A NO 180241 B NO180241 B NO 180241B
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NO
Norway
Prior art keywords
disperser
mass
steam
disc
disk
Prior art date
Application number
NO944847A
Other languages
Norwegian (no)
Other versions
NO180241C (en
NO944847D0 (en
NO944847L (en
Inventor
Tom H Egenes
Terje Fjellkleiv
Esten Nordal
Original Assignee
Kvaerner Hymac As
Kvaerner Pulp Equipment As
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 Kvaerner Hymac As, Kvaerner Pulp Equipment As filed Critical Kvaerner Hymac As
Priority to NO944847A priority Critical patent/NO180241C/en
Publication of NO944847D0 publication Critical patent/NO944847D0/en
Priority to AU42729/96A priority patent/AU4272996A/en
Priority to PCT/NO1995/000226 priority patent/WO1996018769A1/en
Publication of NO944847L publication Critical patent/NO944847L/en
Publication of NO180241B publication Critical patent/NO180241B/en
Publication of NO180241C publication Critical patent/NO180241C/en

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Classifications

    • 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
    • D21D1/004—Methods of beating or refining including disperging or deflaking
    • D21D1/006—Disc mills
    • D21D1/008—Discs
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/14—Disintegrating in mills
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30—Defibrating by other means
    • D21B1/32—Defibrating by other means of waste paper
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/64—Paper recycling

Description

Oppfinnelsen vedrører en innretning for behandling av partikkelmasse, innbefattende et riveapparat, midler for tilsetting av en partikkelmasse til riveapparatet; en skivedisperger og midler for overføring av partikkelmasse fra riveapparatet til skivedispergeren, midler for uttak av partikkelmasse fra skivedispergeren; og midler for tilsetting av damp til innretningen for oppvarming av partikkelmassen. The invention relates to a device for treating particulate matter, including a shredding apparatus, means for adding a particulate matter to the shredding apparatus; a disk disperser and means for transferring particle mass from the shredder to the disk disperser, means for withdrawing particle mass from the disk disperser; and means for adding steam to the device for heating the particle mass.

Ifølge konvensjonell teknikk kan partikkelmasse, særlig trefibermasse og mer særskilt masse som inneholder retur-papir, behandles ved hjelp av et antall prosesstrinn som innbefatter avvanning i en avvanningssone ved hjelp av en skruepresse, hvorved massekonsentrasjonen øker. According to conventional techniques, particulate pulp, in particular wood fiber pulp and more specifically pulp containing recycled paper, can be processed using a number of process steps which include dewatering in a dewatering zone by means of a screw press, whereby the pulp concentration increases.

Fra avvanningssonen ledes massen deretter til en oppvarmingssone, hvor massen fremmates under tilsetting av damp. From the dewatering zone, the mass is then led to a heating zone, where the mass is advanced while steam is added.

Den oppvarmede masse tilføres deretter en skivedisperger hvor materialet bearbeides for reduksjon av størrelsen til forurensinger i massen, såsom trykksverte, voks, bitumen, etc. The heated mass is then fed to a disk disperser where the material is processed to reduce the size of impurities in the mass, such as printing ink, wax, bitumen, etc.

I oppvarmingssonen benyttes som regel en langsomt roterende skrue hvor damp tilsettes punktvis henover skruen gjennom en manifold. Dampen avgir termisk energi ved kondensasjon, og massen oppvarmes. Skruen kan være hel eller opphakket. En slik forvarmerskrue dimensjoneres vanligvis for ca. 3 min. oppholdstid og ca. 50$ fylningsgrad. Rotasjonshastigheten til en forvarmer av denne typen ligger i området 5-15 omdrei-ninger/minutt . In the heating zone, as a rule, a slowly rotating screw is used, where steam is added point by point across the screw through a manifold. The steam releases thermal energy by condensation, and the mass is heated. The screw can be whole or chopped. Such a preheater screw is usually dimensioned for approx. 3 min. residence time and approx. 50$ fill rate. The rotation speed of a preheater of this type is in the range 5-15 revolutions/minute.

Den langsomme rotasjonen til skruen gir liten omblanding av massen, slik at det kan være store lokale temperaturgrad-ienter i massen. Den kondenserende dampen vil dermed komme i dårlig kontakt med massepartiklene. Massepartiklene kan være ganske store i en konvensjonell forvarmer, det trengs dermed relativt lang tid for å gjennomvarme massepartiklene. The slow rotation of the screw causes little mixing of the mass, so that there can be large local temperature gradients in the mass. The condensing steam will thus come into poor contact with the pulp particles. The mass particles can be quite large in a conventional preheater, so it takes a relatively long time to heat through the mass particles.

Det i dag anvendte utstyr er også relativt plasskrevende. Det foreligger derfor et klart behov for bedre utstyr hvormed man kan gjennomføre den innledningsvis skisserte prosess på en hurtigere og billigere måte, med mindre plassbehov. The equipment used today is also relatively space-consuming. There is therefore a clear need for better equipment with which the initially outlined process can be carried out in a faster and cheaper way, with less space required.

Fra det norske utlegningsskrift 172.503 er det kjent å ha et såkalt masse-riveapparat i en oppvarmingssone i et behand-lingsanlegg som innbefatter en skivedisperger. Det fremheves i publikasjonen at masse-riveapparatet omdanner en masseplugg til partikkelform, slik at massen kan oppvarmes ensartet og hurtig. Det sies intet om at dette masse-riveapparat, bortsett fra muligheten for dampinnføring, kan ha en spesiell hastighet eller utførelse. From the Norwegian specification document 172,503, it is known to have a so-called mass shredder in a heating zone in a treatment plant which includes a disc disperser. It is emphasized in the publication that the pulp shredder converts a plug of pulp into particle form, so that the pulp can be heated uniformly and quickly. Nothing is said that this pulp shredder, apart from the possibility of introducing steam, can have a particular speed or design.

Ifølge oppfinnelsen foreslås det en innretning som nevnt innledningsvis, og det som kjennetegner innretningen ifølge oppfinnelsen er at riveapparatet er en skivedisperger. According to the invention, a device as mentioned in the introduction is proposed, and what characterizes the device according to the invention is that the shredder is a disc disperser.

Med dette oppnås den fordelen at det gies mulighet for dispergering på to temperaturnivåer, henholdsvis kald og varm masse. I det sistnevnte tilfelle kan den første skivedisperger virke som en predisperger hvor det dispergeres forurensninger mens massen er relativt kald, noe som vil kunne være fordelaktig for visse trykksverter. Den andre skivedisperger vil virke som en slags hoveddisperger som dispergerer mens massen er varm, noe som vil være fordelaktig med hensyn til forurensninger. With this, the advantage is achieved that it is possible to disperse at two temperature levels, respectively cold and hot mass. In the latter case, the first disk disperser can act as a predisperser where contaminants are dispersed while the mass is relatively cold, which could be advantageous for certain pressure inks. The second disc disperser will act as a kind of main disperser that disperses while the mass is hot, which will be beneficial with regard to contaminants.

Ifølge oppfinnelsen kan særlig hensiktsmessig midlene for tilsetting av damp munne sentralt i den første skivedisperger . According to the invention, the means for adding steam can particularly expediently discharge centrally into the first disc disperser.

Ifølge oppfinnelsen kan midlene for tilsetting av damp munne sentralt også i den andre skivedisperger. According to the invention, the means for adding steam can also enter centrally into the second disc disperser.

Denne praktiske realisering av oppfinnelsen medfører et unikt forvarmerkonsept som vil kunne gi ytterst kort forvarmingstid på grunn av god blanding damp/masse samt minimal størrelse på massepartiklene. This practical realization of the invention entails a unique preheater concept which will be able to provide an extremely short preheating time due to a good steam/mass mixture and minimal size of the mass particles.

Det oppnås en mulighet for innblanding av kjemikalier som bleker massen og/eller forbedrer effektiviteten av selve dispergeringen av forurensningspartiklene i massen. There is an opportunity to mix in chemicals that bleach the pulp and/or improve the effectiveness of the actual dispersion of the pollution particles in the pulp.

Særlig interessant er at det også oppnås mulighet for dispergering på to temperaturnivåer, henholdsvis kald og varm masse. I det sistnevnte tilfelle kan den første skivedisperger virke som en predisperger hvor det dispergeres forurensninger mens massen er relativt kald, noe som vil kunne være fordelaktig for visse trykksverter, såsom laser, xerox, mens den andre skivedisperger vil virke som en hoveddisperger som. dispergerer mens massen er varm, noe som vil være fordelaktig med hensyn til forurensninger såsom såkalte "stickies" etc. Particularly interesting is that it is also possible to disperse at two temperature levels, respectively cold and hot mass. In the latter case, the first disc disperser can act as a pre-disperser where contaminants are dispersed while the mass is relatively cold, which could be advantageous for certain printing inks, such as laser, xerox, while the second disc disperser will act as a main disperser which. disperses while the mass is hot, which will be beneficial with respect to contaminants such as so-called "stickies" etc.

Ifølge oppfinnelsen kan fordelaktig midlene for tilføring av partikkelmasse til den første skivedisperger innbefatte en transportskrue med hul aksel for føring av damp til den første skivedisperger, hvorved man oppnår den fordel at dampen føres sentralt inn i skivedispergeren og den deri tilsatte masse. According to the invention, the means for supplying particle mass to the first disk disperser can advantageously include a transport screw with a hollow shaft for guiding steam to the first disk disperser, thereby achieving the advantage that the steam is fed centrally into the disk disperser and the mass added therein.

Ifølge oppfinnelsen kan midlene for overføring av partikkelmasse til den andre skivedisperger innbefatte en transportskrue med hul aksel for føring av damp til det indre av den tilordnede skivedisperger. According to the invention, the means for transferring particle mass to the second disc disperser may include a transport screw with a hollow shaft for guiding steam to the interior of the assigned disc disperser.

Oppfinnelsen skal nå beskrives nærmere under henvisning til tegningene, hvor: Fig. 1 rent skjematisk viser en innretning ifølge The invention will now be described in more detail with reference to the drawings, where: Fig. 1 schematically shows a device according to

oppf innelsen, the invention,

fig. 2 rent skjematisk viser en modifisert utførelse av en innretning ifølge oppfinnelsen, og fig. 2 purely schematically shows a modified embodiment of a device according to the invention, and

fig. 3 viser et mer artistisk perspektivriss av et anlegg hvor en innretning ifølge oppfinnelsen anvendes. fig. 3 shows a more artistic perspective view of a plant where a device according to the invention is used.

Den i fig. 1 viste innretning innbefatter en skivedisperger 1 med en mateskrue 2. Skivedispergeren 1 innbefatter i hoved-saken en statorskive 3 og en rotorskive 4, drevet av en motor 5 . The one in fig. The device shown in 1 includes a disc disperser 1 with a feed screw 2. The disc disperser 1 mainly includes a stator disc 3 and a rotor disc 4, driven by a motor 5.

Videre innbefatter innretningen en andre skivedisperger 8, oppbygget på samme måte som den første skivedisperger 1, dvs. med en mateskrue 9, en statorskive 10 og en rotorskive 11, drevet av en motor 12. Furthermore, the device includes a second disk disperser 8, constructed in the same way as the first disk disperser 1, i.e. with a feed screw 9, a stator disk 10 and a rotor disk 11, driven by a motor 12.

Masse som skal behandles tilføres mateskruen 2 som vist med pilen 6. Fra den første disperger 1 går den der behandlede masse til mateskruen 9, som antydet med pilen 7. Mass to be treated is supplied to the feed screw 2 as shown by arrow 6. From the first disperser 1, the mass treated there goes to the feed screw 9, as indicated by arrow 7.

Dispergert masse forlater den andre disperger 8 som antydet med pilen 13. Dispersed mass leaves the second disperser 8 as indicated by the arrow 13.

Damp som oppvarmingsmedium kan tilføres den første disperger 1 gjennom mateskruens 2 hule aksel 14, som antydet med pilen 15. Dampen kan på denne måten føres sentralt inn i skivedispergeren 1 og dermed sentralt inn i den ved hjelp av transportskruen 2 tilsatte masse i skivedispergeren. Steam as a heating medium can be supplied to the first disperser 1 through the hollow shaft 14 of the feed screw 2, as indicated by arrow 15. In this way, the steam can be fed centrally into the disc disperser 1 and thus centrally into the mass added by means of the transport screw 2 in the disc disperser.

Den andre skivedisperger 8 har en tilordnet mateskrue 9, med massiv aksel 16. The second disc disperser 8 has an assigned feed screw 9, with solid shaft 16.

Innretningen ifølge oppfinnelsen kan også realiseres i en modifisert form, som vist i fig. 2. Den eneste forskjell mellom innretningen i fig. 1 og fig. 2 er at transportskruens 9 aksel er utført som en hulaksel 16', hvorigjennom det kan tilføres damp, som antydet med pilen 17. The device according to the invention can also be realized in a modified form, as shown in fig. 2. The only difference between the device in fig. 1 and fig. 2 is that the shaft of the transport screw 9 is designed as a hollow shaft 16', through which steam can be supplied, as indicated by the arrow 17.

Fig. 3 viser et anlegg hvor innretningen ifølge oppfinnelsen anvendes. Det er for de anleggskomponenter som tilsvarer dem i fig. 2 viste anvendt, de samme henvisningstall. Fig. 3 shows a plant where the device according to the invention is used. It is for the plant components that correspond to those in fig. 2 showed used, the same reference numbers.

Anlegget innbefatter en skruepresse 18, med et masseinnløp 19 og et utløp 20, som går til en transportskrue 2 via et tilløp 6. Transportskruen 2 er tilordnet en skivedisperger 1. The plant includes a screw press 18, with a mass inlet 19 and an outlet 20, which goes to a transport screw 2 via an inlet 6. The transport screw 2 is assigned to a disc disperser 1.

Skivedispergerens 1 utløp er tilknyttet en skruetransportør hvis funksjon tilsvarer pilen 7 i fig. 2 og derfor er gitt samme henvisningstall. Skruetransportøren 7 har et utløp som munner i en transportskrue 9, tilordnet en andre skivedisperger 8. Skivedispergerens 8 utløp er betegnet med 13 i samsvar med tilsvarende pil i fig. 2. The outlet of the disk spreader 1 is connected to a screw conveyor whose function corresponds to the arrow 7 in fig. 2 and therefore the same reference number is given. The screw conveyor 7 has an outlet which opens into a transport screw 9, assigned to a second disc disperser 8. The outlet of the disc disperser 8 is denoted by 13 in accordance with the corresponding arrow in fig. 2.

Damp kan etter behov tilføres skivedispergeren 1 og/eller 8 gjennom respektive dampledninger 15,17, som er tilknyttet de respektive hulaksler 14,16'. As required, steam can be supplied to the disk disperser 1 and/or 8 through respective steam lines 15,17, which are connected to the respective hollow shafts 14,16'.

Skruepressen 18 representerer en avvanningssone hvor massen avvannes. Derfra går massen til den første skivedisperger 1. Damp tilsettes i senter av skivedispergeren 1, og kan samtidig også tilsettes i skivedispergeren 8, som mottar masse fra skivedispergeren 1. The screw press 18 represents a dewatering zone where the mass is dewatered. From there, the pulp goes to the first disc disperser 1. Steam is added in the center of the disc disperser 1, and can also be added at the same time to the disc disperser 8, which receives pulp from the disc disperser 1.

I skivedispergeren 1 får massen en meget god blanding med den tilsatte damp, samtidig som massepartiklenes størrelse reduseres. In the disk disperser 1, the pulp gets a very good mixture with the added steam, while the size of the pulp particles is reduced.

I den andre disperger 8 skjer på kjent måte en reduksjon av størrelsen til forurensninger i massen, såsom trykksverte, voks, bitumen, etc. In the second disperser 8, a reduction in the size of impurities in the mass, such as printing ink, wax, bitumen, etc. takes place in a known manner.

Skivedispergeren 1 kan også benyttes som en fordispergator, idet da de to dispergerne vil operere under forskjellige temperaturbetingelser. Predispergeren 1 vil dispergere forurensninger mens massen er relativt kald, noe som er fordelaktig for visse trykksverter som laser, xerox., mens dispergeren 8 som hoveddisperger vil dispergere mens massen er varm, noe som er fordelaktig for forurensninger såsom "stickies", etc. The disk disperser 1 can also be used as a predisperser, as the two dispersers will operate under different temperature conditions. The pre-disperser 1 will disperse contaminants while the mass is relatively cold, which is advantageous for certain printing inks such as laser, xerox., while the disperser 8 as the main disperser will disperse while the mass is hot, which is advantageous for contaminants such as "stickies", etc.

Med oppfinnelsen oppnår man den fordel at forvarmingstiden blir meget kort, som følge av god blanding damp/masse samt minimal størrelse på massepartiklene. Det vil være mulig å blande inn kjemikalier som bleker massen og/eller forbedrer effektiviteten av selve dispergeringen av forurensningspartiklene i massen. With the invention, the advantage is that the preheating time is very short, as a result of a good steam/mass mixture and minimal size of the mass particles. It will be possible to mix in chemicals that bleach the pulp and/or improve the effectiveness of the actual dispersion of the pollution particles in the pulp.

Innretningen er fleksibel og gir mulighet for dispergering på to temperaturnivåer, henholdsvis kald og varm masse (damp-tilførsel bare i den andre disperger). The device is flexible and allows for dispersion at two temperature levels, respectively cold and hot mass (steam supply only in the second disperser).

Damp kan i tillegg også tilføres andre steder, hvor det måtte være ønskelig, eksempelvis som antydet med pilen D i fig. 1. In addition, steam can also be supplied in other places, where it may be desirable, for example as indicated by arrow D in fig. 1.

Claims (5)

1. Innretning for behandling av partikkelmasse, innbefattende et riveapparat (1), midler (2) for tilsetting av en partikkelmasse til riveapparatet; en skivedisperger (8) og midler (7,9) for overføring av partikkelmasse fra riveapparatet (1) til skivedispergeren (8), midler (13) for uttak av partikkelmasse fra skivedispergeren (8); og midler (14) for tilsetting av damp til innretningen for oppvarming av partikkelmassen, karakterisert ved at riveapparatet (1) er en skivedisperger.1. Device for processing particulate mass, including a shredding device (1), means (2) for adding a particulate mass to the shredding device; a disk disperser (8) and means (7,9) for transferring particle mass from the shredder (1) to the disk disperser (8), means (13) for withdrawing particle mass from the disk disperser (8); and means (14) for adding steam to the device for heating the particle mass, characterized in that the shredding device (1) is a disc disperser. 2. Innretning ifølge krav 1, karakterisert ved at midlene (14) for tilsetting av damp munner sentralt i den første skivedisperger (1).2. Device according to claim 1, characterized in that the means (14) for adding steam open centrally in the first disc disperser (1). 3. Innretning ifølge krav 2, karakterisert ved at midlene for tilsetting av damp munner sentralt (16') også i den andre skivedisperger (8).3. Device according to claim 2, characterized in that the means for adding steam opens centrally (16') also in the second disk disperser (8). 4. Innretning ifølge et av kravene 1-3, karakterisert ved at midlene for tilføring av partikkelmasse til den første skivedisperger (1) innbefatter en transportskrue (2) med hul aksel (14) for føring av damp (15) til den første skivedisperger (1).4. Device according to one of claims 1-3, characterized in that the means for supplying particle mass to the first disk disperser (1) includes a transport screw (2) with hollow shaft (14) for guiding steam (15) to the first disk disperser (1) . 5 . Innretning ifølge et av kravene 1-4, karakteris ert - v ed at midlene for overføring av partikkelmasse til den andre skivedisperger (8) innbefatter en transportskrue (9) med hul aksel (16') for føring av damp (17).5 . Device according to one of claims 1-4, characterized in that the means for transferring particle mass to the second disc disperser (8) include a transport screw (9) with a hollow shaft (16') for guiding steam (17).
NO944847A 1994-12-14 1994-12-14 Device for processing particle mass NO180241C (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NO944847A NO180241C (en) 1994-12-14 1994-12-14 Device for processing particle mass
AU42729/96A AU4272996A (en) 1994-12-14 1995-12-07 Means for treatment of particle mass
PCT/NO1995/000226 WO1996018769A1 (en) 1994-12-14 1995-12-07 Means for treatment of particle mass

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO944847A NO180241C (en) 1994-12-14 1994-12-14 Device for processing particle mass

Publications (4)

Publication Number Publication Date
NO944847D0 NO944847D0 (en) 1994-12-14
NO944847L NO944847L (en) 1996-06-17
NO180241B true NO180241B (en) 1996-12-02
NO180241C NO180241C (en) 1997-03-12

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Application Number Title Priority Date Filing Date
NO944847A NO180241C (en) 1994-12-14 1994-12-14 Device for processing particle mass

Country Status (3)

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AU (1) AU4272996A (en)
NO (1) NO180241C (en)
WO (1) WO1996018769A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19712651A1 (en) * 1997-03-26 1998-10-01 Voith Sulzer Stoffaufbereitung Method and device for producing a hot, mostly paper fiber-containing crumb
DE19712653C2 (en) 1997-03-26 2002-10-24 Voith Paper Fiber Systems Gmbh Method and device for dispersing a waste paper pulp
DE10102449C1 (en) 2001-01-19 2002-03-21 Voith Paper Patent Gmbh Disperser for high-consistency fibrous papermaking material, comprises comminuter with an internal, counter-rotating toothed ring turning at different speed than the main rotor
AT411604B (en) * 2002-03-27 2004-03-25 Andritz Ag Maschf METHOD AND DEVICE FOR DISPERSING A PAPER FIBER FIBER
FI20022050A (en) * 2002-11-18 2004-05-19 M Real Oyj Method and apparatus for making mechanical fiber
DE102005012168A1 (en) * 2005-03-17 2006-09-28 Voith Paper Patent Gmbh Method and device for loading fibers contained in a pulp suspension with filler
FI122243B (en) * 2009-03-17 2011-10-31 Metso Paper Inc Method and system for grinding wood chips or pulp fibers

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE413601B (en) * 1976-06-30 1980-06-09 American Defibrator SET FOR MANUFACTURING THE FIBER MASS IN A UNDERPRESSED MALAWARE AND DEVICE FOR IMPLEMENTATION OF THE SET
AT398991B (en) * 1993-05-24 1995-02-27 Andritz Patentverwaltung MIXERS, IN PARTICULAR HIGH-PERFORMANCE MIXERS FOR REFINING PRE-CRUSHED SUBSTANCES

Also Published As

Publication number Publication date
WO1996018769A1 (en) 1996-06-20
AU4272996A (en) 1996-07-03
NO180241C (en) 1997-03-12
NO944847D0 (en) 1994-12-14
NO944847L (en) 1996-06-17

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