B - Operations – Transporting – 07 – C
Patent
B - Operations, Transporting
07
C
B07C 5/02 (2006.01) B07B 9/00 (2006.01) B07B 15/00 (2006.01) B07C 5/342 (2006.01) D21B 1/02 (2006.01)
Patent
CA 2137461
The object of the invention is a method for manufacturing low bark content wood chips from whole-tree chips, in which method there are two or more sequential separation stages, which can be di- vided into pre-separation with a bark content of less than 10 % and final cleaning, and in which the pre-separation consists of at least pneumatic separ- ation and the final cleaning includes sorting based on colour difference. According to the invention, before pneumatic separation the bark is removed from the chips by grinding, which simultaneously reduces the particle size of the bark.
Edelmann Kari
Seppanen Veli
Gowling Lafleur Henderson Llp
Valtion Teknillinen Tutkimuskeskus
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