Coarseness of Particles in Flotation in Impeller-Type Cells
S. A. Kondrat'ev, K. A. Kovalenko
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: Flotation particle size, detachment model, energy dissipation
Abstract
The study focuses on stability of particle-bubble attachment versus the size of particles attached to bubbles, design of a flotation cell and the input energy. The main force to tear away a particle from a bubble is assumed to be the inertia force conditioned by undulation of the gas-liquid interface. It is examined how the bubble surface oscillations influence detachment of particles. The oscillation amplitude is a function of the energy dissipation rate. The energy dissipation rate is determined using the methods of computational hydrodynamics in Ansys Fluent. The calculated sizes of particles produced in frother flotation with regard to coalescence in the froth bed agree with the existing and new experimental data.
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