METHOD OF ADHESIVE SEPARATION Russian patent published in 1997 - IPC

FIELD: mineral concentration; applicable in withdrawal of hydrophobic and hydrophobic particles, for instance, diamonds. SUBSTANCE: method includes application of hot adhesive coating to surface of working member, cooling of adhesive coating with water, forced contacting of flooded grainy material with adhesive coating, separation of stuck particles of useful component from adhesive coating, removal of barren rock particles by the process of their intensive attrition with subsequent return of incompletely ground residue to the head of adhesive separation and withdrawal of barren rocks in form of slime into dump. Forced contacting of flooded grainy material with adhesive coating is effected after mechanical activation of useful component particles in intensive attrition and simultaneous heat treatment with high-temperature flow of liquid, superheated steam or hot air, in which oily substances and surfactants are preliminarily introduced. Application of adhesive coating is accomplished in its molten state with supply of hot air or live steam to moving hydrophobic surface of working member, and then, cooled with water and direct contact of adhesive coating with particles of treated material. Speed of movement of hydrophilic surface of working member is taken equal to speed of movement of particles of treated material in zone of contact with adhesive coating. Forces contacting of a part of treated material with adhesive coating is accomplished in their rolling between two touching each other flexible surfaces of working member with adhesive coating and continuous shifting of these surfaces relative to each other. Process of intensive attrition of particles of barren rock with each other is effected with their volume compression by forced polygradient shifting of concentric layers of material at simultaneous action onto ground material with high-temperature flow of liquid, superheated steam or hot air. EFFECT: higher efficiency. 3 cl, 3 dwg