How a Frother Works: Frother Action

The main purpose of the frothing agent is to create a froth capable of “carrying” or holding the mineral-laden bubbles until the can be removed from the flotation machine. This objective is accomplished by imparting temporary toughness to the covering film of the bubble. The life of the individual bubble is thus prolonged until it can be further stabilized by adherence of mineral particles and joined with other bubbles at the pulp surface to form a froth.

Once the “froth” is withdrawn from the flotation machine, however, it is desirable that it break down rapidly, to prevent interference with subsequent processing operations.

The ability to lower the surface tension of water is a characteristic of all frother. Since most organic compounds can do so to at least a limited degree, the number of commercially available frothers might be expected to be large. However, because a frothers must also be economical feasible, readily available, effective in low concentrations, and essentially free of collector properties, only a few materials are commercially suitable.

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