APPARATUS FOR EXTRACTING ELECTRICALLY CONDUCTING PARTICLES FROM MIXTURE OF DISPERSED NON-MAGNETIC MATERIALS Russian patent published in 2008 - IPC B03C1/02 

FIELD: extraction of non-magnetic electrically conducting dispersed materials such as particles of rare and noble metals contained in natural and technogenic placer deposits, in non-ferrous metallurgy, metal working industry branch, production of building materials and in food making industry.

SUBSTANCE: apparatus includes loading hopper, receiving reservoir for conducting particles, receiving reservoir for non-conducting particles, magnetic system, electric current source, magnetic field inductor, unit for supplying mixture to zone for forming magnetic field. Electromagnet is used as magnetic field inductor for generating powerful pulse magnetic field with intensity H(t) no less than 10⁶ A/m at changing rate (dH(t)/dt) no less than 10⁷A/mxs and at gradient (grad H) no less than 10 A/m. Electric current pulse source is used as current pulse generator made with possibility for forming powerful electric current pulses at current increasing rate in pulse dI(t)/dt such as 10A/s at asymmetrical in time form of electric current pulses and at front edge duration of pulse less than duration of back edge of pulse.

EFFECT: possibility for extracting fine and ultra-fine fractions of non-ferrous, rare and noble metals from mixture of dispersed non-magnetic materials.

5 cl, 2 dwg