Patent ID: 6129212
Filing Date: 2000-10-10
Classification: B03D,D21F

Abstract:
A flotation process for separating ink from a paper fiber suspension containing ink within a flotation tank by flotation, the flotation producing clarified accepted paper fiber stock and a foam containing said ink collected on a surface of the suspension within the flotation tank, the flotation process comprising:introducing a feed paper fiber suspension containing ink, which does not originate from inside of the flotation tank into the flotation tank, through an inlet opening;aerating the feed suspension, which does not originate from inside of the flotation tank, prior to a guiding element;guiding a portion of the aerated suspension from the inlet opening to the guiding element;aspirating a portion of the suspension within the flotation tank;drawing the aspirated portion into the guiding element;mixing the guided portion with the aspirated portion within the guiding element; andcollecting the foam containing said ink from the surface of the suspension in said flotation tank.