COAL BENEFICATION METHOD Russian patent published in 2020 - IPC B03B7/00 B03D1/02 

FIELD: technological processes.

SUBSTANCE: disclosed invention relates to coal, coal slurry or coal beneficiation enrichment processing technologies and can be used in coal, fuel and metallurgical industry to produce high-grade, high-calorific, low-ash coal. Coal beneficiation method involves grinding, mixing the water-coal suspension with agglomerating agents and additional introduction of a foaming agent, flotation. Crushed material is subjected to screening with separation of large and small classes. Large classes are enriched with gravitational processes to produce concentrates, which are sent for further processing, and tailings, which are sent to dump. Small classes are mixed with water to produce water-coal suspension, into which agglomerating agents, depressor and foaming agent are added. Then aeration of water-coal suspension is performed and then it is enriched with floatation in centrifugal field to obtain coal concentrate, which is sent for further processing, and dump tailings. Agglomerating agents used are a collector of a mixture of hydrocarbons of acyclic and aromatic types of oil origin, with consumption thereof of 2400 to 2600 g/t, depressor - liquid glass, at its consumption from 500 to 600 g/t, foaming agent - reagent Montanol 800, at its consumption from 190 to 210 g/t.

EFFECT: increasing specific capacity.

1 cl, 1 tbl