RECOVERY METHOD OF ULTRADISPERSED DIAMONDS FROM IMPACTITES Russian patent published in 2017 - IPC C01B31/06 B01J19/10 B82B3/00 B82Y40/00 

FIELD: mining.

SUBSTANCE: recovery method of ultradispersed diamonds from impactites includes prelimenary preparation of material by crushing and grinding to produce a particle size less than 0.25 mm. The crushed material is subjected to gravitational enrichment at the concentration table to obtain the concentrate and tailings, at that the tails are directed to the dump, and the concentrate is subjected to ultrasonic treatment at a frequency from 22 up to 44 kHz for 15 to 30 minutes. The toluene in the amount of 10 to 40% from volume is added to the crushed material , and subjected to ultrasonic leaching at frequency from 22 kHz to 44 for 15 to 30 minutes, then subjected to filtration and washing with water.

EFFECT: extraction of diamonds nano- and microfractions of impact origin raw materials, environmental safety of the diamond raw material processing increase.

2 dwg, 1 ex