METHOD OF COAL IMPROVEMENT Russian patent published in 2017 - IPC B03D1/02 B03B1/00 

FIELD: mining.

SUBSTANCE: method includes improvement of coal slurry flocculation, conditioning with successive introduction into the pulp collector and frother and the allocation of fuel supply in the concentrate. Premixed before flocculation anionic copolymer of acrylamide with sodium acrylate and sodium salt of carboxymethylates of oxyethylated isononylphenol general formula C₉H₁₉-C₆H₄-O-(C₂H₄O)_n-COONa, where n=10-12, at a ratio of 20:1. After the resulting mixture was injected into the slurry in an amount of 33-42 g/ton of coal.

EFFECT: improved recovery of the combustible mass in the concentrate.

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