D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
D21C 5/02 (2006.01) D21B 1/32 (2006.01)
Patent
CA 2080886
Abstract of disclosure A method of removing fine contaminants from waste paper fibrous material (S) is described with solution (1) and pre cleaning (2) whereupon the fibrous material is first subjected to a washing treatment (3) and then to a flotation treatment (5). The washing filtrate (12) from the washing treatment (3) is cleaned in a filtrate-flotation treatment (4) so that a cleaned fraction (14) can be returned into the useful material (13) of the washing treatment. The so cleaned waste paper fibrous material can be passed to further treatment steps such as flotation, bleaching and/or dispersion. The reject material from the filtrate- flotation (4) is, in one embodiment, again subjected to a flotation treatment. (Fig- 1)
Matzke Wolfgang
Michelewski Bruno
Matzke Wolfgang
Michelewski Bruno
Sulzer-Escher-Wyss Gmbh
Swabey Ogilvy Renault
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