C - Chemistry – Metallurgy – 10 – L
Patent
C - Chemistry, Metallurgy
10
L
44/10
C10L 1/32 (2006.01)
Patent
CA 2012197
ABSTRACT OF THE DISCLOSURE A coal aqueous slurry having a high concentration and a high dispersion stability, and thus utilizable for industrial use, comprises coal particles having a size of 500 µm or less and dispersed in an aqueous medium containing a dispersing additive at a particle size distribution in which a variation coefficient in size of the coal particles is 0.3 or more, determined in accordance with the equation C = .sigma./M, M = .SIGMA.(log10Si) x Vi and .sigma. = (.SIGMA.((log10Si - M) x Vi)2)0.5 wherein C: the variation coefficient in size of the coal particles, M: an average general logarithmic size of the coal particles, Si: an average size in µm of a portion of the coal particles in fraction No. i which is one of a plurality of fractions provided by dividing the entire amount of the coal particles in accordance with the order of the particle size, each fraction consisting of coal particles having a size in a predetermined range, Vi: a ratio in weight or volume of the portion of the coal particles in the fraction No. i to the entire amount of the coal particles, and .sigma.: a standard deviation of the size of the coal particle.
Hashimoto Noboru
Ito Koichi
Matsumoto Osamu
Tokuda Shinichi
Japan Com Company Ltd.
Jgc Corporation
Ridout & Maybee Llp
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