Process for dispersing pulp

摘要

Dispersion of a paper fibrous material, comprises: providing an aqueous paper fibrous material suspension; fractionating the aqueous paper fibrous material suspension in a fractionating device, where a coarse fraction and a fine fraction are formed; and thickening and dispersing the coarse fraction. The fractionation is carried out in such a way that in the coarse fraction, short fibers and long fibers and that in the fine fraction, fine materials are charged.