| 简介 |
Useful model can be used for extraction of the nonmagnetic dispersible conductive materials from mixture with the dispersible non-conducting nonmagnetic materials, such as particles of rare and noble metals, contained in natural and technogenic placer deposits. Problem : possibility of extraction of small and thin fractions of non-ferrous, rare and precious metals from mixture of dispersed non-magnetic materials. The essence of the : separator, containing charging hopper, receiving tank for conductive particles, receiving tank for non-conducting particles, current source and solenoid, agent feed mixture in zone of magnetic field formation, differs, structural parameters solenoid are made from the condition of provision of force interaction of magnetic field with conducting particles (F), in compliance with expression f about σ x r 4 x h (t) x dH (t)/ dt, where σ-specific conductivity particles; r-linear size of particles; h (t) intensity of magnetic field not less than 10 6 and/m, with gradient (grad n) not less than 10 8 and/m 2, at that, as current source used current pulse generator made with possibility of generating powerful current pulses, with rate of increasing electric current in pulse di (t)/ dt of the order of 10 8 and/with asymmetric in time form of electric current pulses, with duration of anterior pulse front at rear, Besides, agent feed mixture in zone of magnetic field formation is made in the form of feeder with vibration drive. Besides, solenoid is located under unloading edge feeder with vibration drive. 1 3. u. 2 cl, 2 ill. |
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