MODIFICATION METHOD FOR LOW RANK COAL

摘要

The present invention comprises the steps of: pulverizing coal; manufacturing coating oil by mixing and stirring middle distillate with solvent oil; manufacturing coal slurry by mixing and stirring the pulverized coal and coating oil at room temperature; separating the coating oil and coal cake from the coal slurry using a solid/liquid separator; evaporating and drying the solvent oil and water contained in the coal cake; and molding the coal cake. The modification method can produce high quality coal with high caloric value and minimize moisture reattachment and natural combustion. [Reference numerals] (AA) Coal; (BB) Grinder; (CC) Asphalt; (DD) Lamp oil; (EE) Heavy oil/Lamp oil mixer; (FF) Slurry manufacturer; (GG) Solid and liquid separator; (HH) Drier; (II) Oval briquettes molder; (JJ) Lamp oil tank; (KK) Oil and water separator; (LL) Condenser; (MM) Waste water