METHOD OF PROCESSING OF THE DIAMOND-CONTAINING CONCENTRATES Russian patent published in 2008 - IPC C01B31/06 B01J19/10 

FIELD: chemical industry; methods of processing of the diamond-containing concentrates.

SUBSTANCE: the invention is pertaining to separation of the diamonds from the diamonds-containing rock and the marks of technological processes concentration and may be used in the production shops of the final treatment of the diamond- -containing concentrates in the mining-and-processing integrated works of the diamond-mining firms. For creation of the self-contained ecologically safe cycle of production of pure diamonds the processing of the diamond-containing concentrates is conducted in the autoclave at the temperatures of 200-400° С using the saturated solution of the sodium carbonate with addition of 3-5 % of the weight % of sodium hydroxide in the field of the ultrasonic radiation, then the autoclave is cooled and in the reaction mass, which contains the non-reacted water solution of the sodium carbonate, they route oppositely to the gravitational force the stream of the concentrated hydrochloric and nitrogen acids for formation of the conditions of the flotation-gravitational division and separation of the diamonds from the products of the production process. At that for creation of the closed cycle of the production process at flotation-gravitational separation of the diamonds from the products of the production process use the concentrated acids, which have remained after the final cleaning of the diamonds. The invention ensures the high quality of the cleaning of the diamonds at the minimal usage of the toxic mediums, which allows the considerable reduction of the cost of the production process.

EFFECT: the invention ensures the high quality of the diamonds cleaning, the minimal usage of the toxic mediums in the production process, the considerable reduction of its cost.

2 cl, 2 ex