| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a modified solid fuel for lowering manufacturing cost and an environmental load, increasing strength for conveyance and the like, and suppressing spontaneous ignition, and to provide the modified solid fuel manufactured by the method. SOLUTION: The solid fuel is manufactured by grinding low grade coal, mixing a solvent oil component with the ground low grade coal to prepare slurry, heating the slurry to a temperature equal to or higher than a boiling point of water to vaporize water contained in the slurry, separating the solvent oil component from the slurry to form coal powder, and compressing and molding the coal powder. In manufacturing the solid fuel, a nonvolatile component contained in the low grade coal is extracted by the solvent oil component when the slurry is heated to the temperature equal to or higher than the boiling point of water, and the outer surface of the low grade coal and the inner surface of its pore are coated with the extracted nonvolatile component, while a content of a heavy oil component added externally is set to be lower than 0.5 mass%, preferably substantially 0%, to the dried solid fuel. COPYRIGHT: (C)2011,JPO&INPIT |
