EP0661404B1 - Mahlmaschine und Mahlwerkzeug zum Mahlen von suspensiertem Faserstoffmaterial - Google Patents

Mahlmaschine und Mahlwerkzeug zum Mahlen von suspensiertem Faserstoffmaterial Download PDF

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Publication number
EP0661404B1
EP0661404B1 EP94114918A EP94114918A EP0661404B1 EP 0661404 B1 EP0661404 B1 EP 0661404B1 EP 94114918 A EP94114918 A EP 94114918A EP 94114918 A EP94114918 A EP 94114918A EP 0661404 B1 EP0661404 B1 EP 0661404B1
Authority
EP
European Patent Office
Prior art keywords
milling
milling tool
strip
fibrous material
shaped elevations
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94114918A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0661404A1 (de
Inventor
Frank Peter Meltzer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Paper Fiber and Environmental Solutions GmbH and Co KG
Original Assignee
Voith Sulzer Stoffaufbereitung GmbH
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 Voith Sulzer Stoffaufbereitung GmbH filed Critical Voith Sulzer Stoffaufbereitung GmbH
Publication of EP0661404A1 publication Critical patent/EP0661404A1/de
Application granted granted Critical
Publication of EP0661404B1 publication Critical patent/EP0661404B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D21D1/20—Methods of refining
    • D21D1/30—Disc mills
    • 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
    • D21D1/22—Jordans
    • 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 devices for grinding suspended fibrous material according to the preamble of claim 1 or 5.
  • Grinding tools of the type mentioned are often also called sets and installed in grinding machines - so-called refiners.
  • Such grinding machines have at least one rotor and at least one stator with either disk-shaped or conical surfaces on which the grinding tools or fittings are attached, so that grinding gaps can form between them.
  • the grinding tools considered here have webs and grooves on the work surfaces, which is why one speaks of "knife sets" (see EP-A-2 352 917).
  • the invention thus creates grinding devices in which the energy used can be better used for grinding the fibrous material. It has been shown that not only is it possible to achieve an increase in the degree of grinding more economically, but that with the grinding it is also possible to maintain the fiber lengths and fiber strengths relatively well. As already indicated, the assessment of the effect will always be based on the grinding developments that have been achievable to date, which is why it does not make sense to generally specify a fixed numerical value here. The investigations on the subject of the invention show in any case a significant reduction in the energy required, without sacrificing fiber quality.
  • a significant innovation compared to the prior art is an improved flow guidance in the gap between the rotor and stator through which the fiber suspension is flowing.
  • a rotation zone is provided which axially borders the rotor, but in which there are no webs on at least one side. No grinding takes place in this annular zone.
  • a possible reason for the better economy is the increased backflow of the suspension, i.e. radially inwards, out of this area. As is known, this can improve the grinding result. In particular, the grinding becomes more uniform.
  • Said annular zone can, as described in claim 1, be formed radially outside the actual grinding tools or, according to claim 2, radially outer zone of the grinders themselves.
  • Fig. 1 shows the subject of the invention in the form of a disc refiner.
  • a part of the housing 1, the rotor 2 and the stator 3 can be seen.
  • the rotor and stator serve as grinding tool carriers.
  • the suspended fibrous material can be fed in through the inlet opening 5 and discharged through the outlet opening 6.
  • the rotor 2 is axially fixed, while the stator 3 is axially movable relative to the rotor 2, being prevented from rotating by bolts 15.
  • the rotor 2 has a working surface 7 and the stator 3 has a complementary further working surface 8.
  • a grinding gap 9 is formed between the two work surfaces. The latter is drawn in an exaggerated manner here and in the other figures.
  • the illustration is chosen so that the strip-shaped elevations 10 and 11 are cut in the upper part and drawn uncut in the lower part. It can be seen that the strip-shaped elevations 10 and 11 extend less far outwards on both sides of the grinding gap 9 than the rotor or stator.
  • FIG. 2 shows a section of the subject matter of the invention from FIG. 1 with a part of the stator 3 which extends radially outside by the dimension a further than that strip-shaped elevation 11.
  • the latter is part of a grinding tool, the base 14 of which also extends by a dimension beyond the radially outer extent of the strip-shaped elevation 11.
  • the elevation 11 has the height c above the base 14 of the grinding tool.
  • FIG. 3 schematically shows a diagram which shows the grinding development M as a function of the grinding energy E.
  • the grinding development proceeds according to curve A2, while a faster grinding development, curve A1, can be achieved with the aid of the invention.
  • curve A2 a faster grinding development
  • the qualitative values depend very much on the substance used, and the diagram only serves to illustrate the benefits that can be achieved.
  • FIG. 4 and 5 further embodiments are basically sketched using a disc refiner. It can namely be the shorter extension of the strips on the stator side (Fig. 4), on the rotor side (Fig. 5) or - as already shown in Fig. 1 - on both sides.
  • Fig. 6 differs from Fig. 5 in that not only the actual strip 10, but also the grinding tool itself has a smaller outer diameter than the associated rotor.
  • the principle shown in FIG. 6 can also be applied to the other combinations according to FIG. 1, 4 or 5.
  • Fig. 7 outlines a cone refiner in which the elevations 10 forming the working surface of the rotor 2 extend less far (dimension a) to the outside than the rotor itself and the elevations 11 of the stator 3.
  • the dimension (a) is in the cone -Work surface measured to the outside.
  • FIG. 8 shows the top view of a typical work surface found on disc refiners with a large number of elevations 10 with a width b, which are of different designs here, and the channel-like grooves 12.
  • dimension a is shown.
  • the complementary working surface usually has the same pattern with regard to the elevations, the same as said in connection with FIGS. 1 and 4-6 for the existence of dimension a.
  • the complementary work surface can also be designed very differently, e.g. have different knife angles or have a pimple or hole pattern.
  • FIG. 9 An embodiment of the subject matter of the invention as a double disk refiner is indicated in FIG. 9.
  • the rotor 2 which is provided with working surfaces on both sides, and two stator 3, which have complementary working surfaces.
  • Double disc refiners and associated load systems are known to the person skilled in the art in their structure and their effect. It is important in connection with the invention that the strip-shaped elevations 10 and / or 11 extend less far than the stator 3 or rotor 2.
  • the dimension c shown represents the height dimension of the surface of the strip-shaped elevation 10 above the base area 13.

Landscapes

  • Crushing And Grinding (AREA)
  • Paper (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP94114918A 1993-11-06 1994-09-22 Mahlmaschine und Mahlwerkzeug zum Mahlen von suspensiertem Faserstoffmaterial Expired - Lifetime EP0661404B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4337998 1993-11-06
DE4337998A DE4337998A1 (de) 1993-11-06 1993-11-06 Mahlmaschine und Mahlwerkzeug zum Mahlen von suspendiertem Faserstoffmaterial

Publications (2)

Publication Number Publication Date
EP0661404A1 EP0661404A1 (de) 1995-07-05
EP0661404B1 true EP0661404B1 (de) 1997-08-06

Family

ID=6502008

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94114918A Expired - Lifetime EP0661404B1 (de) 1993-11-06 1994-09-22 Mahlmaschine und Mahlwerkzeug zum Mahlen von suspensiertem Faserstoffmaterial

Country Status (5)

Country Link
US (1) US5566903A (fi)
EP (1) EP0661404B1 (fi)
AT (1) ATE156540T1 (fi)
DE (2) DE4337998A1 (fi)
FI (1) FI945182A (fi)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018212830B3 (de) * 2018-08-01 2020-01-23 Elena Vladimirovna Artemieva Zerkleinerungsverfahren und -anlage

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1369685A (en) * 1921-02-22 Grinding-plates
GB596039A (en) * 1945-07-16 1947-12-24 James Clay Wellington Ltd Improvements relating to machines for grinding corn and the like
US277578A (en) * 1883-05-15 kinkead
DE14965C (de) * H. gruson, König!. Commerzienrath in Buckau-Magdeburg Neuerungen an Scheibenmühlen
US199070A (en) * 1878-01-08 Improvement in mills for reducing grain
US878693A (en) * 1904-05-16 1908-02-11 Samuel Vessot Grain-mill.
US1184058A (en) * 1915-07-02 1916-05-23 Harry C Watson Pulp-beater.
US1593854A (en) * 1924-09-26 1926-07-27 Sprout Waldron & Co Wheat-cracking machine
US1851071A (en) * 1928-06-30 1932-03-29 Travis Pierce Mason Dispersion mill
SU137397A1 (ru) * 1960-02-29 1960-11-30 А.П. Онохин Аппарат непрерывного действи дл размельчени твердой фазы гетерогенной среды
US3448934A (en) * 1966-08-12 1969-06-10 Frank C Vaughan Refining apparatus
US4081147A (en) * 1976-05-27 1978-03-28 The Black Clawson Company Reversible disk refiner plates
US4171101A (en) * 1976-05-27 1979-10-16 The Black Clawson Company Method of operating a disk refiner provided with reversible refining plates
SU1058603A1 (ru) * 1981-12-30 1983-12-07 Всесоюзное научно-производственное объединение целлюлозно-бумажной промышленности Размалывающий орган дисковой мельницы
US4395047A (en) * 1982-02-10 1983-07-26 Koppers Company, Inc. Shaft seal with seal impeller for materials processing machinery
US4614309A (en) * 1984-09-18 1986-09-30 Beloit Corporation Rigid link multiple disk refiner
US5200038A (en) * 1985-08-28 1993-04-06 International Paper Company Pulp refiner with fluidizing inlet
DE4217316A1 (de) * 1992-04-25 1993-11-04 Troester Maschf Paul Vorrichtung zum zermahlen von gummi
US5398877A (en) * 1993-07-09 1995-03-21 Global Technologies Group Multi-disc refiner with free floating plate mechanism

Also Published As

Publication number Publication date
DE4337998A1 (de) 1995-05-11
ATE156540T1 (de) 1997-08-15
DE59403636D1 (de) 1997-09-11
FI945182A (fi) 1995-05-07
EP0661404A1 (de) 1995-07-05
FI945182A0 (fi) 1994-11-03
US5566903A (en) 1996-10-22

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