MIXING UNIT FOR USE IN A MIXING APPARATUS AND A MIXING APPARATUS COMPRISING SUCH A MIXING UNIT
A mixing unit (201) for use in a mixing apparatus for mixing treatment media in liquid or gaseous state with a fiber suspension. The mixing unit is adapted to be arranged in a mixing chamber of the mixing apparatus and comprises at least one rotor (207) and at least one stator (209). Each rotor is adapted to be connected to the drive shaft to rotate with the drive shaft in a direction of rotation (R), and each rotor comprises at least one radially extending rotor arm (208a-f). Each stator is arranged axially adjacent at least one rotor, and each stator comprises at least one radially extending stator arm (210a-g). The at least one stator arm and the at least one rotor arm are mutually configured such that at least a portion of a leading surface of said rotor arm passes a front surface of the stator arm at an angle during rotation of said rotor.