Abstract
The pulverizing behavior of coals in organic solvents has been studied by a homogenizer-type pulverizer. The pulverized coal powder exhibited a particle size distribution consisting of coarse and fine particles divided at around 70μm. Illinois No. 6 coal was pulverized easily in solvents such as toluene and hexane which hardly swelled the coal, but it was not easy to pulverize in solvents such as acetone and ethanol which swelled the coal. The pulverizing characteristics also depended on the coal rank. The low rank coals, Wandoan and Wabamun, were hard to pulverize in toluene. Vitrinites and inertinites were condensed in the fine and coarse particles, respectively.
