Title:
METHOD FOR CONTROLLING IMPURITY IN PRODUCTION OF WASTE PAPER PULP, METHOD FOR PRODUCING WASTE PAPER PULP AND PRINTING PAPER
Document Type and Number:
Japanese Patent JP2004091978
Kind Code:
A
Abstract:
To enable the control of impurities to be easily and stably carried out when producing a waste paper pulp by using unsorted waste paper as a raw material.
The impurities are removed from a fiber slurry by using a screen 4 having ≤0.12mm slit width or hole diameter, and the reject rate at the screen 4 is regulated within a range of ≥10% so that the measured value by an automatic impurity-measuring instrument M installed in the accept side of the screen 4 may be not higher than an objective value in a production line of the waste paper using the unsorted waste paper as the raw material.
Inventors:
ONO SEIZO
OSATO AKIRA
OSATO AKIRA
Application Number:
JP2002255391A
Publication Date:
March 25, 2004
Filing Date:
August 30, 2002
Export Citation:
Assignee:
DAIO SEISHI KK
International Classes:
B01D29/01; D21C5/02; D21D5/02; (IPC1-7): D21D5/02; B01D29/01; D21C5/02
Attorney, Agent or Firm:
Yoshihisa Nagai