METHOD FOR SEPARATION OF DIAMOND-CONTAINING MATERIALS AND DEVICE FOR ITS REALISATION Russian patent published in 2009 - IPC B07C5/344 B03C7/00 

FIELD: technological processes.

SUBSTANCE: invention is related to separation of dry diamond-containing materials, for instance, concentrates of primary enrichment. Method for separation of diamond-containing materials includes displacement of sorted material to measurement zone. Together with displacement of separated material, its triboelectric charging is carried out by friction against surface of grounded metal vibrating tray. Separated mixture of minerals is supplied in the mode of free falling flux. Contactless measurement of sign and value of induced triboelectric charge is carried out with the help of detector connected to fast-acting electrometric amplifier connected to unit of signal processing. Separation threshold is selected based on previously assessed values for natural diamonds of preset class of fineness. Detector for contactless measurement is arranged with the help of sign measurement and tribocharge value in the form of internal sensitive electrode - metal pipe of rectangular section installed on high-quality insulator inside metal grounded body.

EFFECT: possibility to additionally extract diamonds from tailings of, for instance, roentgenoluminescence separation.

11 cl, 2 dwg, 3 ex