| 摘要 |
PURPOSE:To easily obtain a high-concn. coal/water slurry suitable as a boiler fuel even if difficultly combustible coal is used as a raw material, by previously crushing the feed coal to such an extent that the max. size of the coal particle is not more than a specified value, followed by wet crushing. CONSTITUTION:Feed coal is previously crushed to such an extent that the max. coal particle size is not more than about 1,000-150mum by subjecting the feed coal to dry crushing, to drycrushing and dry classification, to wet crushing, or to wet crushing and wet classification. A coal/water slurry of coal concn. >=about 500mum is prepd. by subsequent wet crushing. Thus it is possible to obtain a high-concn. coal/water slurry suitable as a boiler fuel even when difficultly combustible coal of a fuel ratio of about 1-3 is used as a raw material.
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