Wood fiber and regenerated pulp mixing and grinding process

• Main Authors: ZHANG CHENGFEI, LIU XIANGXING, LIANG YONGQING, LI YUQIANG, LIU YONG
• Format: Patent
• Language: Chinese; English
• Published: 22.08.2023
• Subjects: 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

The invention discloses a wood fiber and regenerated pulp mixed grinding process, which comprises the following steps: repulping and deslagging: putting wood fiber and regenerated pulp into a chain plate machine according to a ratio of 1: (0.5-0.8), repulping and defibering by using a vertical hydrapulper, controlling the repulping concentration to be 5.5-6%, controlling the repulping temperature to be 65-70 DEG C by using diluted white water through steam heating, and adding PHgt at the same time; 6.2 liquid caustic soda is used for ensuring the moistening and swelling of the fibers and improving the shape and toughness of the fibers; impurities and crude fiber bundles in the pulp are screened and removed through a high-concentration slag separator after repulping, and discharged slag can be thrown into a waste paper line to be recycled and reused; grinding: selecting a grinding sheet suitable for coarse fiber grinding, and obtaining regenerated pulp/wood fiber mixed grinding pulp with a good grinding effect