| 摘要 |
PURPOSE:To obtain a homogeneous coal-water slurry having high concentration and fluidity, and excellent long-term stability, by charging a wet mill simultaneously with roughly crushed coal, water and a specific pulverization assistant, and carrying out the pulverization until the particle size is reduced to a specific level. CONSTITUTION:A wet mill is charged simultaneously with (A) roughly crushed coal, (B) water and (C) a pulverization assistant containing, as an essential component, a polyether compound (derivative) having a molecular weight of 16,000- 300,000 and obtained by the addition of an alkylene oxide to an alcohol (derivative) having >=3 (preferably >=5) active hydrogen atoms in the molecule, and the coal is pulverized until the ratio of the coal particles passing through a 200 mesh sieve reaches 70-90wt%. The objective coal-water slurry having a coal concentration of 60-80% can be obtained thereby.
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