公开(公告)号：EP0726880A4

公开(公告)日：1999-04-28

申请号：EP95902436

申请日：1994-11-04

申请人： INT PAPER CO

发明人： MARKHAM LARRY DERWOOD

IPC分类号： D21B1/32 ,  D21B1/34 ,  D21C5/02 ,  C03B37/00 ,  D21C9/08

CPC分类号： D21B1/345 ,  D21B1/325 ,  D21C5/025 ,  Y02W30/646 ,  Y02W30/648

摘要： A process for separating printing ink from recycled paper fiber (20) includes the steps of repulping recycled paper furnish with water in a rotary mixer (10) for about 5 minutes at a consistency of 6 % to 18 % with a mixing element (16) having a top speed no greater than 2,000 ft/min. This first stage repulping and mixing is followed by a second mixing stage of 20 to 45 minutes with a mixing element tip speed 2,500 to 4,000 ft/min. Agglomerated contamination particles in the resulting slurry are removed by centrifugal cleaning and slot screening (18).