SELECTIVE DETACHMENT OF SILICA FROM COATTACHED SILICA AND HEMATITE PARTICLES ON GLASS BEADS

Abstract

The detachment of fine particles of silica (0.12 μm) and hematite (0.10 μm) coattached on glass beads (80 μm) in aqueous solution were studied as a function of pH and electrolyte concentration. Detachment occurs at alkaline conditions wherein the surface potentials of the particles and collector are negative. The selective separation of silica particles being governed by the balance of short range forces, which are affected by increasing the pH and electrolyte concentration.

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Notes on contributors

T. Sugimoto

Author to whom all correspondence should be addressed.