Froth structure in continuous flotation cells: Relation to the prediction of plant performance from laboratory data using process models |
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| Authors: | GW Cutting D Watson A Whitehead SP Barber |
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| Institution: | Warren Spring Laboratory, P.O. Box 20, Gunnels Wood Road, Stevenage, Herts SG1 2BX England |
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| Abstract: | The paper discusses the obstacles in the way of making mathematical models of flotation circuits for use in process design; and describes also a route towards simple, but practical, models of full-scale flotation plant performance, which overcome the major problems. The principal difficulties lie in simulating the froth processes at full-scale. Timed batch tests may be used to identify the pulp-froth transfer processes, and steady-state (“equilibrium”) cell tests may be used to identify static froth concentration profiles. Froth mobility in a real cell is different from that in an “equilibrium” cell, and this paper shows how these dynamic patterns have been investigated, and may be used to simulate full-scale circuits. It is shown that it is not possible, at the present time, to completely eliminate judgement and experience from the establishment of parameter values; but the position should improve as experience accumulates. |
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