Pulping method used for producing kraft paper from recycled waste paper

• Main Authors: WU RUSHUANG, GUO ZHENG, HUANG QIZHI, YU XINGBAO, DU HANMIN, LIU KAI, DU HANJIE, ZHENG MINGHUA, XIONG GUOPING
• Format: Patent
• Language: Chinese; English
• Published: 26.07.2019
• Subjects: APPARATUS THEREFOR; FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT; IMPREGNATING OR COATING OF PAPER; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS; PULP COMPOSITIONS; REGENERATION OF PULPING LIQUORS; 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 pulping method used for producing kraft paper from recycled waste paper. The pulping method used for producing kraft paper from recycled waste paper comprises following steps: waste paper is selected, and is introduced into a cutting machine for cutting of waste paper into blocks, and a magnetic separation equipment is adopted for separation of magnetic materials in an obtained primary pulp; the primary pulp is introduced into a screening equipment to remove impurities in the primary pulp so as to obtain a fine screened pulp; the fine screened pulp is subjected to concentration using a multi-disc concentration machine so as to obtain a waste paper pulp; recycled leather is subjected to pulping using a pulper, and then is subjected to high concentration slag removing, coarse screening, low concentration slag removing, fine screening, and concentration successively so as to obtain a leather fiber slurry suitable for paper making; the waste paper pulp and the leather fiber slurry are in