MECHANICAL DESTRUCTION OF FLOCCULES BY SHEARING
V. E. Vigdergauz, G. Yu. Gol’berg
Institute of Comprehensive Exploitation of Mineral Resources, Russian Academy of Sciences, Kryukovskii tupik 4, Moscow, 111020 Russia
vigderg@mail.ru
Keywords: Flocculating structures, ultimate shear stress, rheology, pseudo-plasticity
Abstract
Based on the analysis of ultimate stress of floccules under shear, the authors determined maximum force and stress for bridges between particles of solid to keep strong. The rheological research showed that flocculating structures in concentrate suspensions and in coal flotation slurries are kindred with liquid-like pseudo-plastic systems by nature of flow. The experimentally obtained ultimate dynamic shear stresses depending on dosing of flocculants are comparable with theoretical calculations and distinct from the latter by 25% at the most.
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