METHOD OF FOAM SEPARATION AND FLOTATION Russian patent published in 1999 - IPC

FIELD: mineral concentration, in particular, flotation methods; may be used in processing of ore and nonmetalliferous materials. SUBSTANCE: method includes conditioning of initial materials with reagents in the presence of surfactants and oily substances; preparation of foam layer by introduction into pulp of foam-forming agent and gas in the form of finely dispersed bulbs; supply of conditioned material onto foam layer and into pulp body; separation in foam layer and in pulp body; production and removal of foam and cell products with their simultaneous dewatering to obtain solid and liquid phases. Conditioning of initial material with reagents and preparation of foam layer are effected with use of pneumohydraulic aeration where compressed air is preliminarily introduced into pressure water which is used in the form of liquid phase from dewatering of foam with production after pneumohydraulic aeration of finely dispersed gas-water mixture with ultrafine gas-air bubbles, and surfactants and oily substances. Supplied into foam product is coarse-grained product. During conditioning of coarse-grained product, excessive liquid phase of pulp and reagent mixture transform it into fine-grained product. EFFECT: higher technological characteristics of the process due to improvement of conditions for formation of flotocomplexes with high carrying capacity. 3 cl, 3 dwg