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'I'he flotation of very fine ores is desirable because of the
occurrence of some ores that require fine grinding to achieve
liberation. The literature has been concerned with electrical and
chemical effects at the interface of finely ground minerals. The
writer proposed to investigate the effect of increasing gravity
by the use of centrifugal force on the collection and separation of
finely gound ores.
The collection of minerals appeared to be hindered by increased
gravity, but the separation was enhanced by increased gravity in the
tests where conditions were conducive to froth flotation.