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 carried out by fractions after its preliminary hydraulic classification and dewatering. Operation of conditioning of obtained coarse-grained sand and fine-grained slime fractions is made 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. Conditioning of initial material with reagents and preparation of foam layer are made with use of pneumohydraulic aeration in which introduced preliminarily into pressure water is compressed air. Pressure water is used in the form of liquid phase from dewatering of foam product with production, after pneumohydraulic aeration of finely-dispersed agr-air mixture with ultrafine gas-air bubbles and surfactants and oily substances. Solid phase obtained after dewatering of foam product is directed for treatment with use of film flotation. EFFECT: improved conditions for formation of flotation complexes with high carrying ability. 2 cl, 2 dwg