METHOD OF CONVERSION OF COAL WITH EASY-SOAKED ROCK FOR PREPARATION OF DEMINERALISED SUSPENDED COAL FUEL Russian patent published in 2010 - IPC C10L1/32 

FIELD: oil and gas production.

SUBSTANCE: invention refers to method of conversion of coal with easy-soaked rock for preparation of demineralised suspended coal fuel, which includes crushing and wet coal cleaning thus obtaining the concentrate cl. +6 mm, rock and coal slurries, which are supplied for preparation of suspended coal fuel, additional crushing of concentrate cl. 0-6 mm with wet method up to cl. 0-200 mcm or 0-500 mcm at considerable content of clay inclusions thus obtaining water-coal suspension which is classified as to cl. 10 mcm or 50 mcm at considerable content of clay inclusions, top product of classification with particles cl. 0-10 mcm or 0-50 mcm at considerable content of clay inclusions after it is thickened and clarified is supplied as fluid phase for preparation of suspended coal fuel based on coal slurries, clarified water after top product of classification is thickened is returned to water concentration of initial coal, and lower product of classification with particles cl. of 10 mcm or 50 mcm at considerable content of clay inclusions of up to 200 mcm or 500 mcm at considerable content of clay inclusions is subject after dehydration to additional wet grinding up to cl. 0-1 mcm or 0-10 mcm at considerable content of clay inclusions in presence of reagent-plasticiser thus obtaining demineralised suspended coal fuel, clarified water is supplied after dehydration to additional crushing with wet method of concentrate of cl. 0-6 mm.

EFFECT: decreasing ash content of demineralised suspended coal fuel.

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