In an effort to improve flotation efficiency of the domestic minerals industry, the U.S. Bureau of Mines conducted research to measure the improvement provided by fine bubbles on the flotation of fine-sized particles (minus 20-um, minus 625-mesh). The turbulent velocity distributions of the fluid within the flotation cell were measured as a function of time and position and used to increase the precision of a fine-particle, turbulent-flotation model. For the mineral system tested, improved flotation response was obtained in the laboratory testing with small bubbles and intense agitation. These results matched the model's predicted response.
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