SEPARATION OF SOLIDS FROM AQUEOUS SUSPENSIONS

摘要

Cellulosic fines and cellulosic fibres are separated from a suspension containing the fines, the fibres and hydrophobic materials by screening the suspension to remove the fibres, and then subjecting the resultant filtrate to dispersed air flotation in the presence of calcium and generally a separation aid to form an upper Reject fraction in which the hydrophobic material is concentrated and a lower Accept fraction in which the cellulosic fines are concentrated.