METHOD OF EXTRACTION OF THE GOLD-CONTAINING CHALCOGENIDES FROM THE HARD-TO-CONCENTRATE RAW Russian patent published in 2008 - IPC B03B1/00 

FIELD: mining industry; other industries; methods of extraction of the gold-containing the chalcogenides from the hard-concentrating raw.

SUBSTANCE: the invention is pertaining to the concentration of the minerals and may be used at concentration of the crude ore requiring the preprocessing. The technical result of the invention is the increased extraction of the gold-containing chalcogenides from the hard-concentrating raw, production of the of more homogeneous granulometric composition of the ready grade, reduction of dependence of the technological indications from the fluctuations of the material composition. The method includes the ore pretreatment - crushing, comminution and flotation. Comminution before the flotation conduct in the alkaline medium in the presence of the sodium sulfide and iodine.

EFFECT: then invention ensures the increased extraction of the gold-containing chalcogenides from the hard-concentrating raw, production of the of more homogeneous granulometric composition of the ready grade, reduction of dependence of the technological indications from the fluctuations of the material composition.

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