EP 2172590 B1 20151111 - Method and device for preparing raw materials in the production of paper, board or fibreboards
Title (en)
Method and device for preparing raw materials in the production of paper, board or fibreboards
Title (de)
Verfahren und Vorrichtung zur Aufbereitung von Rohstoffen bei der Herstellung von Papier, Pappe oder Faserplatten
Title (fr)
Procédé et dispositif de préparation de matières brutes lors de la fabrication de papier, de carton ou de plaques de fibres
Publication
Application
Priority
DE 102008049336 A 20080929
Abstract (en)
[origin: EP2172590A1] The method comprises processing raw materials to an aqueous fiber suspension that is subsequently grinded in a mill. Nitrogen is added to the raw material and/or the fiber suspension in supercooled form before the grinding process. The raw material and/or the fiber suspension are locally cooled by the addition of nitrogen and subsequently subjected at above 0[deg] C. Waste paper is used as raw material and the nitrogen is added to the waste paper before the preparation of the fiber suspension for better removability of printing inks. An independent claim is included for a device for processing of raw materials for the production of paper, cardboard or fiber plates.
IPC 8 full level
D21B 1/16 (2006.01); D21D 1/20 (2006.01); D21H 23/16 (2006.01)
CPC (source: EP)
D21B 1/16 (2013.01); D21D 1/20 (2013.01); D21H 23/16 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
DOCDB simple family (publication)
EP 2172590 A1 20100407; EP 2172590 B1 20151111; DE 102008049336 A1 20100415; ES 2559384 T3 20160211; PL 2172590 T3 20160531; SI 2172590 T1 20160429; UA 102066 C2 20130610
DOCDB simple family (application)
EP 09170023 A 20090911; DE 102008049336 A 20080929; ES 09170023 T 20090911; PL 09170023 T 20090911; SI 200931358 T 20090911; UA A200909919 A 20090928