As a hydrodynamic approach to the flotation process, the turbulent energy propagation in flotation cells was considered on the basis of the fluctuation velocity and the velocity correlation to yield the following results:(1) The power number in a Agitair type flotation cell or a Warman type flotation cell was constant in the region of Reynolds number>10⁴.
(2) The power consumption without gas phase could be expressed by eq.(4).
(3) The power consumption containing gas phase was decreased with the larger air flow number and this tendency was enhanced by the addition of frother because of the recirculation of dispersed bubbles to the impeller zone.
(4) The energy spectrum function was expressed by eq.(10) or eq.(11) under assumption of isotropic turbulence.
(5) The velocity correlation function in the upper zone of the cell was in accord with the function derived by neglecting the transfer spectrum function, 'whereas it was recognized that such mixing process was a diffusional mixing process.
(6) Nearly 90% of the input energy was reckoned to be dissipated in the impeller zone and about 1% of it was consumed for generation of bubbles.