| 摘要 |
A method for producing a briquetted solid fuel includes the step of pulverizing a low-rank coal. The pulverized low-rank coal is mixed with a solvent oil to give a slurry (mixing step). The slurry is heated and dewatered to give a dewatered slurry (dewatering step). The solvent oil is separated from the dewatered slurry to give a cake (solid-liquid separating step). The cake is heated to further separate the solvent oil from the cake to thereby give a refined coal in powder form (drying step). The refined coal is combined with a property-controlling coal in powder form having, as properties, a loose bulk density of 0.6 kg/L or more and an angle of repose of 40° or less, to give a briquetting feedstock containing the property-controlling coal in an amount of 5 to 70 mass percent based on the total mass of the briquetting feedstock (property-controlling step). The briquetting feedstock is briquetted under pressure to give the briquetted solid fuel in briquette form (briquetting step). |
