Removal of residual stickies at Haindl Paper using new flotation technology

Processing 1900 a. d. metric tons per day of recovered paper makes Haindl P aper in Schongau, Germany, a very large paper deinking mill. The mill start ed to use an innovative, dual approach to improve removal of residual stick ies in their recycling process. Instead of the traditional approach focusin g on pressure screening technology, new injector (aeration element) technol ogy upgraded the existing two-stage post flotation module. Removal efficien cy of residual stickies increased from 45% to 60%. After performing additio nal mill trials with a pilot flotation cell, Haindl Paper found merits in a new flotation process application-floating residual stickies from the fine slotted tailing-screen accepts. Stickies removal efficiency was then 70%.