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Menetelmä ja laite massan valmistamiseksi
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Title:
Menetelmä ja laite massan valmistamiseksi
Author:
LATOMAA, Ari
;
Tienvieri, Taisto
;
SUOJANEN, Vesa
Subjects:
FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
;
IMPREGNATING OR COATING OF PAPER
;
PAPER NOT OTHERWISE PROVIDED FOR
;
PAPER-MAKING
;
PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D
;
PRODUCTION OF CELLULOSE
;
PULP COMPOSITIONS
;
TEXTILES
;
TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G
;
TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKINGMACHINE
Description:
The present application provides a method for producing chemithermomechanical pulp from wood chips, such as softwood chips, the method comprising feeding the chips into a pressurized first preheater, preheating the chips to produce softened chips, discharging the softened chips from the first preheater through a first feeding device arranged to maintain the overpressure, feeding the softened chips to a pressurized second preheater, treating the chips with steam and alkaline chemicals to produce impregnated chips, discharging the impregnated chips from the second preheater through a second feeding device arranged to maintain the overpressure, feeding the impregnated chips to a refiner, and refining the impregnated chips to produce chemithermomechanical pulp. The present application also provides a device for carrying out said method, a wood pulp product obtained with said method and paper product containing said wood pulp product.
Creation Date:
2017
Language:
Finnish;Swedish
Source:
esp@cenet
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