DEVICE AT FLOTATION OF FIBRE SUSPENSIONS

摘要

The device is intended for admixing gas bubbles into a fibre suspension in order to render possible flotation for removing impurities from the suspension. It comprises an inlet portion (1), a mixing portion (2) and a diverging outlet portion (3). The mixing portion (2) is divided into two parallel slit-shaped passages (4) by means of a wing member (5). Each passage (4) communicates with an air supply means (6) with an adjustable slit aperture (7) substantially directly in front of the narrowest portion of the passage (4).