FI91787B - Sätt att framställa mekanisk och kemimekanisk pappersmassa - Google Patents

Sätt att framställa mekanisk och kemimekanisk pappersmassa Download PDF

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Publication number
FI91787B
FI91787B FI905482A FI905482A FI91787B FI 91787 B FI91787 B FI 91787B FI 905482 A FI905482 A FI 905482A FI 905482 A FI905482 A FI 905482A FI 91787 B FI91787 B FI 91787B
Authority
FI
Finland
Prior art keywords
energy consumption
pulp
grinding
kwh
consistency
Prior art date
Application number
FI905482A
Other languages
English (en)
Finnish (fi)
Other versions
FI905482A0 (sv
FI91787C (sv
Inventor
Lars-Aoke Hammar
Per Engstrand
Myat Htun
Rune Pettersson
Boerje Svensson
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 FI905482A0 publication Critical patent/FI905482A0/sv
Publication of FI91787B publication Critical patent/FI91787B/sv
Application granted granted Critical
Publication of FI91787C publication Critical patent/FI91787C/sv

Links

Classifications

    • 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
    • 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
    • D21B1/16—Disintegrating in mills in the presence of chemical agents

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Paper (AREA)

Claims (4)

1. Förfarande att framställa mekanisk och kemimekanisk pappersmassa genom sönderdelning och malning av vedmate-rial i dtminstone tvä steg, kännetecknat av att materialet 5 grovsönderdelas i det första steget vid en koncentration over 20 % med en energi-insats av högst 800 kWh per ton vedmaterial, att i vedpolymererna förekommande sura grup-per helt eller delvis neutraliseras genom tillsats av NaOH i en mängd av högst 9 kg per ton, att materialet utspädes 10 medelst vatten med en temperatur motsvarande ligninets mjukningstemperatur, dvs 40-95°C, och med en jonstyrka av högst 0,05 mol per liter samt att materialet sedan males vid en koncentration av 1-10 % med en energi-insats av totalt högst 500 kWh per ton material. 15
2. Förfarande enligt patentkrav 1, kännetecknat av att ätminstone 25 % av den totala energi-insatsen tillföres vid malningen. 20
3. Förfarande enligt patentkrav 1, kännetecknat av det grovsönderdelade materialet efter det första steget tvät-tas för att reducera jonstyrkan.
4. Förfarande enligt nägot av de föregäende patentkra-25 ven, kännetecknat av att energi-insatsen i varje malsteg • uppgdr till 50-150 kWh per ton massa.
FI905482A 1988-05-06 1990-11-05 Sätt att framställa mekanisk och kemimekanisk pappersmassa FI91787C (sv)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE8801731 1988-05-06
SE8801731A SE461103B (sv) 1988-05-06 1988-05-06 Framstaellning av mekanisk och kemimekanisk massa i tvaa steg
PCT/SE1989/000172 WO1989010998A1 (en) 1988-05-06 1989-04-05 Method of making mechanical and chemi-mechanical papermaking pulp
SE8900172 1989-04-05

Publications (3)

Publication Number Publication Date
FI905482A0 FI905482A0 (sv) 1990-11-05
FI91787B true FI91787B (sv) 1994-04-29
FI91787C FI91787C (sv) 1994-08-10

Family

ID=20372264

Family Applications (1)

Application Number Title Priority Date Filing Date
FI905482A FI91787C (sv) 1988-05-06 1990-11-05 Sätt att framställa mekanisk och kemimekanisk pappersmassa

Country Status (7)

Country Link
EP (1) EP0413736B1 (sv)
JP (1) JPH03504256A (sv)
CA (1) CA1320067C (sv)
DE (1) DE68909231T2 (sv)
FI (1) FI91787C (sv)
SE (1) SE461103B (sv)
WO (1) WO1989010998A1 (sv)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9002039D0 (sv) * 1990-06-07 1990-06-07 Svenska Traeforskningsinst Saett att framstaella massa
US5853534A (en) * 1992-12-30 1998-12-29 Sunds Defibrator Industries Ab Method of producing pulp with high yield using a two-stage refining system operating at different temperatures
US6899791B2 (en) 1997-08-08 2005-05-31 Andritz Inc. Method of pretreating lignocellulose fiber-containing material in a pulp refining process
US8734611B2 (en) * 2008-03-12 2014-05-27 Andritz Inc. Medium consistency refining method of pulp and system
SE540961C2 (en) * 2016-05-23 2019-01-29 Holmen Ab Method of providing a paper fibre composition by combining chemical and mechanical pulping

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE409476B (sv) * 1978-02-17 1979-08-20 Sca Development Ab Sett for fraffinering av lignocellulosahaltigt material
JPS564791A (en) * 1979-06-18 1981-01-19 Kogyo Gijutsuin Bleaching of mechanical pulp
CA1246374A (en) * 1983-10-24 1988-12-13 Steve Rowland Two stage high consistency refiner
SE456826B (sv) * 1986-04-18 1988-11-07 Svenska Traeforskningsinst Saett att reducera energikonsumtionen vid raffinering av cellulosahaltigt material

Also Published As

Publication number Publication date
JPH03504256A (ja) 1991-09-19
SE461103B (sv) 1990-01-08
WO1989010998A1 (en) 1989-11-16
SE8801731L (sv) 1989-11-07
DE68909231D1 (de) 1993-10-21
FI905482A0 (sv) 1990-11-05
EP0413736A1 (en) 1991-02-27
SE8801731D0 (sv) 1988-05-06
CA1320067C (en) 1993-07-13
EP0413736B1 (en) 1993-09-15
FI91787C (sv) 1994-08-10
DE68909231T2 (de) 1994-04-28

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Legal Events

Date Code Title Description
BB Publication of examined application
GB Transfer or assigment of application

Owner name: SUNDS DEFIBRATOR INDUSTRIES AB

MM Patent lapsed
MM Patent lapsed

Owner name: SUNDS DEFIBRATOR INDUSTRIES AB