Conference Proceedings

Variability of shear yield stress – measurement and implications for mineral processing

A Knight, F Sofrà, A Stickland, P Scales, D Lester, R Buscall, A Wu (ed.), R Jewell (ed.), A Wu (ed.), R Jewell (ed.)

University of Science and Technology Beijing | Published : 2017


At high concentrations, mineral tailings exhibit solid-like behavior up to a critical shear stress, the shear yield stress , which must be exceeded before flow may occur. The magnitude of has a significant influence upon a wide range of important mineral processing operating parameters, including pipeline pressure gradient, thickener operation and tailings beach slope, for example. Although the concept of a critical shear stress is a simple and convenient engineering metric, in practice the transition from solid to fluid-like behavior is much more complicated, resulting in a range of apparent yield stress values that vary with the applied shear conditions. For example, in constant rate or f..

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