FOAM FLOTATION DEVICE AND FOAM FLOTATION METHOD

摘要

The invention relates to a device for foam flotation and a method for processing particles of mineral ore in suspension in the pulp. The foam flotation device comprises a flotation chamber (1) for separating the pulp (2) into a lower product (3) and an upper product (4) and contains a primary line (18) containing at least three flotation chambers (1) that are connected in series and each of which is configured to receive the bottom product from the previous chamber (1), while the flotation chamber (1) contains a reservoir (5) and an impeller (7) located inside the reservoir (5), as well as gas supply means (8) located inside the tank (5), while the volume of the tank (5) is at least 200 m, the flotation chamber (1) contains a chute (15) for collecting foam, configured to receive the top product (4) and having an overflow edge ( 14) for foam overflow, while the flotation chamber (1) is characterized by the useful area (A) of the surface of the foam and the area (A) of the pulp, which is calculated as the average of the cross-sectional areas of the tank (5) at the height (h1) of the impeller (7). The ratio (h / D) between the height (h) measured from the bottom (13) of the tank (5) to the overflow edge (14) of the trough (15) and the diameter (D) of the tank (5) at the height (h1) of the impeller (7) ) is less than 1.5. For the third or subsequent flotation chamber (1) in the sequence of chambers, the ratio (A / A) between the useful surface area of the foam and the pulp area is less than 0.45.