A method for the processing of used paper raw materials containing to a for the production of graphic papers suitable fibrous suspension

摘要

The method serves for the treatment of raw materials (m), the used paper. In this process, for the production of graphic papers are formed of suitable fibrous suspension. After the production of an aqueous fibrous suspension (s) and their fractionation (3), at least two fiber-containing fractions (f1, f2, f3) to. Of these fractions (f1, f2, f3) is either only a ground or in the case of grinding of a plurality of fractions (f1, f2, f3) at least a fraction (f1, f2, f3) is ground in such a way that the parameters influencing the grinding effect are set differently than in the case of the fiber grinding (4, 5, 6) of a other fraction (f1, f2, f3).