FIELD: technological processes.
SUBSTANCE: method and device, in which defibered mass is sorted for boon removal, then fractioned in accordance with specific surface, preferably by device comprising hydrocyclones. Mentioned method includes technological stages, in which fiber fractions are separated with lower specific surface, preferably fibers with thicker walls. Mentioned cellulose fibrous mass is fractioned at least into three fractions, at least two of them are combined fully or partially. One or several fractions of fibers with lower specific surface are processed at concentration of mass in interval of 0.8-14%, preferably in range of 1-5% for separation, fibrillation and permanent flattening, preferably by device, which comprises grinding device (5, 5a), such as defibrator, refiner, ball mill or similar equipment.
EFFECT: increased extent of dehydration and energy savings.
26 cl, 16 dwg, 6 tbl, 2 ex
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