Mechanisms of pulp loss in flotation deinking

The objective of this study was to investigate the effects of pulp type, consistency and bubble size on the flotation of pulp fibres and fines. Laboratory-scale batch flotation experiments were conducted using bleached kraft and mechanical pulp in the presence of sodium dodecyl sulphate. Pulp losses were linearly dependent on the recovery of water in the foam. These pulp losses were generally greater with small bubbles (∼ 100-400 μm) and with …