EP 1015682 A1 20000705 - A METHOD FOR THE CONTROL OF A GROUNDWOOD PULPING PROCESS
Title (en)
A METHOD FOR THE CONTROL OF A GROUNDWOOD PULPING PROCESS
Title (de)
VERFAHREN ZUR STEUERUNG EINES HOLZAUFSCHLUSSVERFAHREN
Title (fr)
PROCEDE DE COMMANDE D'UNE OPERATION DE REDUCTION DE BOIS EN PATE MECANIQUE
Publication
Application
Priority
- FI 9700406 W 19970624
- FI 962626 A 19960625
Abstract (en)
[origin: WO9749857A1] The invention relates to a method for the control of a groundwood pulping process. According to the invention the drainability (freeness, CF) of the pulp and another quantity Q characterising the pulp quality are measured, whereby the quantity Q preferably is the tearing resistance (tear index RI), and the measured values CFx and Qx are compared with the set points CF0 and Q0 of the corresponding quantities. The wood supply rate Vn or the wood supply pressure Fn, and the grinding stone's peripheral speed Vp are adjusted so that the sum (CFx - CF0)<2> + (Qx - Q0)<2> obtains its minimum value.
IPC 1-7
IPC 8 full level
CPC (source: EP)
D21B 1/18 (2013.01); D21D 1/002 (2013.01)
Citation (search report)
See references of WO 9749857A1
Designated contracting state (EPC)
DE SE
DOCDB simple family (publication)
WO 9749857 A1 19971231; CA 2294424 A1 19971231; DE 69718683 D1 20030227; EP 1015682 A1 20000705; EP 1015682 B1 20030122; FI 102975 B1 19990331; FI 102975 B 19990331; FI 962626 A0 19960625; FI 962626 A 19971226
DOCDB simple family (application)
FI 9700406 W 19970624; CA 2294424 A 19970624; DE 69718683 T 19970624; EP 97928285 A 19970624; FI 962626 A 19960625