NOVEL GRINDING MIXTURE AND PROCESS FOR PREPARING A SLURRY THEREFROM

摘要

A novel grinding mixture useful for preparing a solid-liquid slurry. This grinding mixture contains from 60 to 82 volume percent of carbonaceous material (such as coal and/or coke), from 18 to 40 volume percent of carrier liquid (such as water and/or oil), and from 0.01 to 4.0 weight percent of dispersing agent. The grinding mixture has a pH of from 7 to 12. There are at least two consists in the grinding mixture. From about 2 to about 50 weight percent of the particles in the grinding mixture have a median particle size of from 0.50 to 40 microns, and from about 50 to about 98 weight percent of the particles in the grinding mixture have a particle size in excess of 40 microns. There is also provided a process for preparing a liquid-solid slurry wherein the grinding mixture is ground until a slurry is produced whose particle size distribution is in accordance with a specified "CPFT" formula.