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Excess nonequilibrium collector adsorption and flotation rates

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Abstract

Experiments using an optically polished Pyrex disk and aqueous dodecylammonium acetate (DAA) films showed that the velocity with which the films recede increases markedly if the runs are repeated at short time intervals, where equilibrium cannot be reattained. This results from DAA molecules being desorbed from the disappearing liquid-air interface and being deposited on the solid-air interface being formed. Controlled experiments with Pyrex particles in a modified Hallimond tube showed a similar increase in flotation rate, again due to excess adsorption of DAA molecules that were transferred to the solid-air interface from the bubble on contact.

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  1. Department of Materials Science and Mineral Engineering, University of California, Berkeley, California, USA

    D. W. Fuerstenau (Professor Emeritus)

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  1. D. W. Fuerstenau
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Fuerstenau, D.W. Excess nonequilibrium collector adsorption and flotation rates. Mining, Metallurgy & Exploration 18, 83–86 (2001). https://doi.org/10.1007/BF03402876

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  • DOI: https://doi.org/10.1007/BF03402876

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