| 摘要 |
PCT No. PCT/JP96/02546 Sec. 371 Date Mar. 5, 1998 Sec. 102(e) Date Mar. 5, 1998 PCT Filed Sep. 6, 1996 PCT Pub. No. WO97/09399 PCT Pub. Date Mar. 13, 1997The present invention relates to high-density coal-water mixed fuel and a producing method thereof and aims to reduce an amount of dispersant to be used in the coal-water mixed fuel having the good fluidity with the increased density and obtain the a coal-water mixed fuel from pulverized coals produced by dry milling at low cost. According to this invention, in case of obtaining the high-density coal-water mixed fuel such as a CWM by mixing the pulverized coals ground to provide a predetermined particle size distribution, water and the dispersant, the hydrophilic colloid which causes the protective effect with respect to the pulverized coals is added and mixed preferably before adding the dispersant so that the high-density coal-water mixed fuel which includes the hydrophilic colloid and a reduced amount of a surface active agent used can be provided. An amount of the hydrophilic colloid to be added is less than 1 wt % of the entire CWM and larger than an amount for causing reciprocal aggregation with the pulverized coals, or more preferably it is in the order from ppm to ppt. Further, when the pulverized coals are rubbed together and the angles thereof are shaved off for production from the pulverized coals, the pulverized coals are spheroidized without extremely being minimized from their original particle size, and superfine particles in the coal particles are generated, thereby enabling adjustment to provide a preferable particle size distribution as the CWM. |
