公开(公告)号：EP2625330B1

公开(公告)日：2016-05-25

申请号：EP11771315.6

申请日：2011-09-29

申请人： Andritz Technology and Asset Management GmbH

发明人： SABOURIN, Marc

IPC分类号： D21B1/02 ,  D21B1/12 ,  D21B1/30 ,  D21D1/30

CPC分类号： D21B1/02 ,  D21B1/021 ,  D21B1/12 ,  D21B1/30 ,  D21D1/30

公开(公告)号：EP2625330A1

公开(公告)日：2013-08-14

申请号：EP11771315.6

申请日：2011-09-29

申请人： Andritz Technology and Asset Management GmbH

发明人： SABOURIN, Marc

IPC分类号： D21B1/02 ,  D21B1/12 ,  D21B1/30 ,  D21D1/30

CPC分类号： D21B1/02 ,  D21B1/021 ,  D21B1/12 ,  D21B1/30 ,  D21D1/30

摘要： Methods of producing mechanical pulps from lignocellulosic material including partial defibration of lignocellulosic material in a chip press followed by liquid impregnation, preheating the lignocellulosic material for 20 seconds or less at a pressure between 7.5 and 12 bar (gauge) prior to mechanically refining the lignocellulosic material in a primary mechanical refiner at a pressure between 7.5 and 12 bar (gauge), thus obtaining a high freeness pulp.