A FROTH FLOTATION ARRANGEMENT AND A FROTH FLOTATION METHOD

The invention comprises a froth flotation arrangement and method for treating mineral ore particles suspended in slurry. The froth flotation arrangement com prising a flotation cell (1) for separating the slurry (2) into an underflow (3) and 5 an overflow (4), wherein the arrangement comprises: a primary line (18) compris ing at least three flotation cells (1) connected in series, wherein each subsequent flotation cell (1) is arranged to receive the underflow (3) from the previous flota tion cell (1), the flotation cell (1) comprising a tank (5), and the flotation cell (1) comprising an impeller (7) within the tank (5), and the flotation cell (1) comprising 10 a gas supply (8) within the tank (5), the tank (5) comprising a volume of at least 200 m3, the flotation cell (1) comprising a froth collection launder (15) capable to receive the overflow (4), the froth collection launder (15) comprising a froth over flow lip (14), the flotation cell (1) having an available froth surface area (A froth), the flotation cell having a pulp area (A pulp), where the pulp area (A pulp) is calcu 15 lated as an average from the cross sectional areas of the tank (5) at the height (h) of the impeller (7). A ratio between a height (h) from a bottom (13) of the tank (5) to the froth overflow lip (14) of the froth collection launder (15) and the diameter (D) of the tank (5) at the height (h1) of the impeller (7) (h/D ) is less than 1,5. The third flotation cell (1) or subsequent flotation cell (1) in the series has a ratio be 20 tween an available froth surface area and the pulp area (A froth/A pulp) less than 0,45. (Figure 1) 19407352_1 (GHMatters) P112759.AU.3