Method and a system for separating an aqueous suspension containing fibrous particles into fractions of different average characteristics

US4288317A · kind A · utility

Assignee

• A/S Niro Atomizer · DK

Inventors

• Alfonso de Ruvo · Stockholm, SE
• Bo Norman · Stockholm, SE
• Geoffrey G. Duffy · Auckland, NZ
• Klaus Moller · Mutterstadt, DE
• Karl E. Hansen · Kokkedal, DK
• Karsten Felsvang · Lillerød, DK
• Erik Liborius · Copenhagen, DK

Key dates

• Filing date: May 11, 1979
• Grant date: Sep 8, 1981
• Expiry date: May 11, 1999

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B07B13/10
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A method and system for separating an aqueous suspension containing fibrous particles into fractions of different average characteristics. The suspension to be separated is supplied to a separator disc rotating in a horizontal plane in the upper part of a chamber, in which collecting means are arranged in different zones to receive material dispersed from the disc. The method and system are effective for the separation of paper pulp suspensions such as groundwood pulp, chemical pulp, sediment or waste paper pulp into fractions of different fibre size and for the cleaning of paper pulp suspensions for impurity particles such as sand, shives and splinters. Another field of application is the separation of mineral wool suspensions into fractions consisting mainly of fibrous and spherical particles, respectively.