Patent ID: 6766909
Filing Date: 2004-07-27
Classification: B03D,C02F

Abstract:
Flotation machine which comprises a flotation cell having a means for feeding slurry in the flotation cell, a means for feeding gas into the slurry and producing aerated slurry and froth, a means for removing froth from the flotation cell and a means for removing tailings from the flotation cell, the aerated slurry and froth being comprised of phases having different densities with an interface therebetween, the aerated slurry phase having a density higher than the density of the froth phase, the flotation cell being provided with at least one separation device, the separation device being attached in the immediate vicinity of a fixed overflow edge so that the froth flows essentially over but cannot flow below the separation device, the separation device having a material density that is lower than the density of the aerated slurry phase and higher than the density of the froth phase, the separation device being arranged to float at the interface between the aerated slurry and froth phases and able to move upwards and downwards in the slurry along with changing levels of the aerated slurry, the separation device has an upper part, a middle part, and a lower part, and at least part of the upper part is in the same plane with the interface between the two phases and the middle part of the separation device is connected to the upper part and is downwardly angled with respect to the upper part, and a lower part connected to the middle part and is in the same plane with the fixed overflow edge.