Patent ID: 6361650
Filing Date: 2002-03-26
Classification: D21D

Abstract:
A process for the processing of a low consistency newsprint pulp having a consistency of less than 5% comprising refining said low consistency newsprint pulp in a first refiner to provide a processed low consistency pulp having a consistency of greater than 2%, screening said processed low consistency pulp with a slotted screen basket having a slot width of from 0.05 to 0.15 mm to provide a primary accept portion and a primary reject portion, with the withdrawal of said primary reject portion being greater than 50%, withdrawing said primary accept portion for further processing, dewatering said primary reject portion to provide a high consistency pulp, refining said high consistency pulp in a second refiner to provide a processed high consistency pulp, screening said processed high consistency pulp with a slotted screen basket having a slot width of less than 0.15 mm to provide a secondary accept portion and a secondary reject portion, and combining said secondary accept portion with said primary accept portion for said further processing.