THE SELECTIVE REMOVAL OF TONER PARTICLES FROM REPULPED SLURRIES BY FLOTATION

The role of particle shape on toner flotation is investigated. Model t oner disks and spheres are created. Interactions of model particles wi th a fixed air bubble in a flow-tube are observed with high-speed cine matography. Motion analysis of thr resulting pictures shows that disks do not attach to bubbles as readily as spheres. Disks that collide wi th bubbles edge-on bounce off because contact lime is too short. Disks that turn to their side before collision seldom attach because the dr ainage area is too large.