METHOD FOR INTEGRATED DEVELOPMENT OF POWER COAL DEPOSITS Russian patent published in 2019 - IPC E21C41/18 C22B11/00 

FIELD: mining.

SUBSTANCE: proposed invention relates to mining, in particular to integrated development of coal deposits, and can be used in development of strata of power coals, in composition of coal substance of which there are elements of platinum group of metals and other valuable chemical elements. Method for integrated development of power coal field includes detailed study of material composition of coal bed, identification of valuable components subject to associated extraction, separate supply of these coals to coal-firing enterprise, grinding and re-grinding in a ball-type drum mill, enrichment to production of ore concentrate, its agglomeration, conversion of valuable components into chemical compounds with change in their aggregate state by burning coal in a furnace of a boiler unit, connection of valuable chemical elements from the flow of gaseous combustion products by their abrupt cooling to temperature lower than temperature of condensation of extracted components with their dissolution and recovery of valuable components, as well as use of solid fossil residues as ore for production of other valuable components. Ore concentrate is obtained from ground coal dust in gravity separator installed after inertial separator in direction of dust-air mixture movement. Pelletizing of ore concentrate is performed by granulation. Further, low-temperature fluidized bed is burnt in the furnace, gas combustion products are cooled in a vessel filled with an aqueous solution of NaOH-type alkali, and gallium is concentrated in ash of power boiler.

EFFECT: higher efficiency of integrated development of coal deposits.

1 cl, 3 dwg