METHOD OF FOAM SEPARATION AND FLOTATION Russian patent published in 2001 - IPC

FIELD: mineral concentration. SUBSTANCE: conditioning of initial material with reagents in presence of oily reagents is performed by fractions after its preliminary hydraulic classification and dewatering. Operation of conditioning of produced coarse-grained sand and fine-grained slime fractions is carried out with use of circulating flotation waters with cocurrent hydraulic removal of excessive oily reagents and fine-grained slime fractions from coarse-grained material. Supply of conditioned material onto foam layer and into pulp body is effected by directing obtained fine-grained slime fractions with excessive flotation reagents into pulp body, and coarse-grained material onto foam layer. Hydraulic classification of initial material is made after degassing of initial pulp. Conditioning of initial material with reagents and preparation of foam layer are made with use of pneumohydraulic aeration in which compressed air is preliminarily introduced into pressure water. The latter is used in the form of liquid phase from foam product dewatering. Produced after pneumohydraulic aeration is finely dispersed gas-air mixture with ultrafine gas-air bubbles and surfactants and oily substances. Obtained solid phase after dewatering of foam product is directed for treatment with use of film flotation. EFFECT: improved conditions for preparation of process and formation of flotation complexes with higher carrying surface. 2 cl, 2 dwg