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NO961481L - Process for the preparation of mechanical pulp - Google Patents

Process for the preparation of mechanical pulp

Info

Publication number
NO961481L
NO961481L NO961481A NO961481A NO961481L NO 961481 L NO961481 L NO 961481L NO 961481 A NO961481 A NO 961481A NO 961481 A NO961481 A NO 961481A NO 961481 L NO961481 L NO 961481L
Authority
NO
Norway
Prior art keywords
grinding
predetermined
pulp
freeness
long fiber
Prior art date
Application number
NO961481A
Other languages
Norwegian (no)
Other versions
NO961481D0 (en
Inventor
Ove Danielsson
Lars Obitz
Bo Falk
Original Assignee
Sunds Defibrator Ind Ab
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 Sunds Defibrator Ind Ab filed Critical Sunds Defibrator Ind Ab
Publication of NO961481D0 publication Critical patent/NO961481D0/en
Publication of NO961481L publication Critical patent/NO961481L/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C7/00—Crushing or disintegrating by disc mills
    • B02C7/11—Details
    • B02C7/14—Adjusting, applying pressure to, or controlling distance between, discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C25/00—Control arrangements specially adapted for crushing or disintegrating
    • 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
    • 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
    • D21D1/303—Double 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
    • D21D1/30—Disc mills
    • D21D1/306—Discs

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Abstract

Fremgangsmåte for styring av fremstilling av mekanisk masse av lignocelluloseholdig materiale som mates til en skiveraffinør (15) med to motstående i forhold til hverandre roterende maleskiver. Materi-alet knuses og bearbeides under passasje utad gjennom en spalte mellom maleskivene til en forutbestemt freeness innen 50 - 200 CSF og et forutbestemt laveste langfiber-innhold. Massens freeness og langfiber-innhold måles kontinuerlig etter raffineringen. Male-spalten måles og reguleres slik at det forutbestemte laveste langfiber-innhold oppnås. Malingen av materiale til raffineren, dvs produksjonen av masse, styres slik at forutbestemt freeness oppnås.Method for controlling the production of mechanical pulp from lignocellulosic material which is fed to a disc refiner (15) with two oppositely rotating grinding discs. The material is crushed and processed during passage outwards through a gap between the grinding wheels to a predetermined freeness within 50 - 200 CSF and a predetermined lowest long fiber content. The freeness and long fiber content of the pulp are measured continuously after refining. The grinding gap is measured and regulated so that the predetermined lowest long fiber content is obtained. The grinding of material for the refiner, i.e. the production of pulp, is controlled so that predetermined freeness is achieved.

NO961481A 1995-04-13 1996-04-12 Process for the preparation of mechanical pulp NO961481L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9501377A SE504234C2 (en) 1995-04-13 1995-04-13 Reducing energy consumption in defibrator for prepn. of mechanical pulp - by regulating gap between rotating grinding discs to give chosen long fibre content in pulp and controlling amt. of material added to give selected pulp freeness

Publications (2)

Publication Number Publication Date
NO961481D0 NO961481D0 (en) 1996-04-12
NO961481L true NO961481L (en) 1996-10-14

Family

ID=20397951

Family Applications (1)

Application Number Title Priority Date Filing Date
NO961481A NO961481L (en) 1995-04-13 1996-04-12 Process for the preparation of mechanical pulp

Country Status (2)

Country Link
NO (1) NO961481L (en)
SE (1) SE504234C2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7172148B2 (en) * 2004-02-05 2007-02-06 Andritz Inc. Grooved pyramid disperger plate

Also Published As

Publication number Publication date
NO961481D0 (en) 1996-04-12
SE9501377L (en) 1996-10-14
SE9501377D0 (en) 1995-04-13
SE504234C2 (en) 1996-12-09

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