COAL SLURRY COMPOSITION

摘要

A coal-water slurry of a coal concentration of 50 to 80 percent by weight having excellent fluidity, dispersion stability, and stability when left standing comprises: (a) a coal powder of which 71 to 85 percent by weight are coal particles of particle sizes of 74.mu. or smaller, and which, moreover, has a particle size distribution such that, when said distribution is represented on a Rosin-Rammler chart, the gradient (in terms of the value of tan .alpha.) of the straight line joining two points respectively corresponding to the quantity (percent by weight) of particles of particle sizes less than 44.mu. and to the quantity (percent by weight) of particles of particle sizes less than 74.mu. is 0.4 to 0.9; (b) at least one species of a specific surfactant; and (c) water.