Method for producing molded solid fuel

摘要

A method for producing a briquetted solid fuel includes pulverizing a low-rank coal. The pulverized low-rank coal is mixed with a solvent oil to give a slurry. The slurry is heated and dewatered to give a dewatered slurry. The solvent oil is separated from the dewatered slurry to give a cake. The cake is heated to further separate the solvent oil from the cake to thereby give a refined coal in powder form. 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. The briquetting feedstock is briquetted under pressure to give the briquetted solid fuel in briquette form.

主权项

1. A method for producing a briquetted solid fuel, the method comprising the steps of:
pulverizing a low-rank coal to give a pulverized low-rank coal; mixing the pulverized low-rank coal with a solvent oil to give a slurry; heating and thereby dewatering the slurry to give a dewatered slurry; separating the solvent oil from the dewatered slurry by liquid-solid separation to give a cake; heating and thereby drying the cake to further separate the solvent from the cake to thereby give a refined coal in powder form; blending the refined coal with a property-controlling coal in powder form to control a property of the refined coal to thereby give a briquetting feedstock comprising the property-controlling coal in an amount of 5 to 70 mass percent based on the total mass of the briquetting feedstock, the property-controlling coal having, as properties, a loose bulk density of 0.6 kg/L or more and an angle of repose of 40° or less; and briquetting the briquetting feedstock under pressure to give the briquetted solid fuel in briquette form.