Siberian Federal University; Institute of Chemistry and Chemical Technology, Siberian Branch of RAS (Russia):

Bragin V. I., Head of Chair, Doctor of Engineering, Professor

Siberian Federal University (Russia):

Baksheeva I. I., Postgraduate, Irina_igorevna@mail.ru

A method of minerals recovery is described, based on magnetic colloids application for mineral particles magnetic properties control with subsequent separation of concentrate by magnetic concentration methods. Information is presented, characterizing magnetic colloids application features in various fields of science and technology. The principles for development of the proposed beneficiation method are substantiated, based on the methods of particles selfassembly and functionalisation that are widely used in nanotechnology, as well as for magnetic nanoparticles control in medicine, in water purification technology and other areas. It was proposed to use magnetic colloids in stabilized aqueous dispersion forms and in solidoilwater double dispersion form. Rational compositions of stabilizing and functionalizing reagents are substantiated with respect to each colloid form. Interaction of functionalized magnetic colloids with surfaces of various compositions was studied by means of scanning electron microscope Hitachi S5500. Selective attachment of colloids, functionalized by sulfhydric reagent, to gold surface was established. It is shown, that aqueous colloid forms structured thin film, and double dispersion — a thicker and more expand ed layer. Magnetic concentration experiments were accomplished with preliminary treatment by functionalized magnetic colloid on the Samsonovskoye ore field gold clay ore, also demonstrating possibility for selection.

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