METHOD FOR EXTRACTION OF LOW-DIMENSIONAL STRUCTURES OF NOBLE METALS FROM CARBON FEEDSTOCK Russian patent published in 2023 - IPC B03B7/00 B03D1/02 

FIELD: mining industry.

SUBSTANCE: proposed invention can be used to extract valuable components from carbonaceous raw materials, in particular for the extraction of precious metals and can be used in the enrichment and processing of carbonaceous and man-made raw materials of various genesis. The method for extracting low-dimensional structures of precious metals from carbonaceous raw materials includes grinding the raw material, carbon flotation with a foaming reagent consisting of a mixture of cyclic alcohols, hyxoethers and ethers of a linear structure, as a result of which a flotation tail is obtained comprising sulphide gold-bearing minerals and a foam product, the stage of sulphide flotation of a flotation tail, processing the froth product of carbon flotation with a microwave field, obtaining a concentrate that comprises coarse particles of precious metals. The raw material is crushed to a fineness of 50% of the class -0.1 mm. The mill drain before carbon flotation is fed for classification to a hydrocyclone to obtain hydrocyclone underflow, which is returned to the mill for regrinding and drain, which enters the agitation tank for agitation, where stirring is carried out for at least 10 minutes in the presence of alkali with a flow rate of 100 to 150 g/t, which is fed to carbon flotation with a foaming agent consumption of 100 to 110 g/t. The froth of carbon flotation is dehydrated and dried to a constant weight before being processed by a microwave field, and then mixed with magnetite with a particle size of -0.044 mm in an amount of 10 to 12% of the sample by weight and subjected to processing by a microwave field with a power of 0.8 to 1 kW with an exposure time of 3 to 5 minutes.

EFFECT: increased efficiency of extraction of precious metals from carbonaceous raw materials due to enlargement of low-dimensional structures of precious metals for their further extraction, reduction of loss of precious metals with concentration tailings.

1 cl, 3 dwg, 4 tbl