Froth flotation unit

A froth flotation unit for treating mineral ore particles suspended in slurry and for separating the slurry into an underflow and an overflow, the froth flotation unit comprising:

• a tank with a centre and a perimeter,
• a gas supply for introducing flotation gas into the slurry to form froth, and
• a first froth collection launder comprising a first froth overflow lip facing towards the centre of the tank, wherein the froth flotation unit has a pulp area of at least 15 m2, measured at a mixing area, wherein the froth flotation unit further comprises:
• a second froth collection launder arranged inside the first froth collection launder, the second froth collection launder comprising a first froth overflow lip facing the perimeter of the flotation tank, and
• a froth blocker arranged between the first froth overflow lip and the second froth overflow lip.