Flotation slurry conditioning method based on controlling interfacial micro-nano bubbles

Abstract

A flotation slurry conditioning method based on controlling interfacial micro-nano bubbles includes steps of adding slurry and flotation reagents into a stirring equipment to make minerals evenly dispersed and fully interact with the flotation reagents; and conveying slurry mixture obtained into a flotation cell for flotation; during a conveying process of the slurry mixture, adjusting a fluid pressure in different conveying sections to make surfaces of minerals in the slurry mixture generating interfacial micro-nano bubbles. A flow velocity of the slurry mixture is increased by changing inner diameters of the different conveying sections to reduce the fluid pressure. Sizes and contact angles of the interfacial micro-nano bubbles generated on surfaces of the minerals are controlled by the change of flow velocity of the slurry mixture, so floatability of the minerals is selectively improved, and hydrophobic agglomeration of fine-grained minerals is promoted.

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