1991 Volume 70 Issue 12 Pages 1130-1135
Width of plastic layer zone was measured in the packed coals heated in a chamber oven by microscopic observation after the rapid quenching to define influen-tial factors related to coals and carbonization conditions. Coals of fluidity in a broader range of temperature formed a wider plastic zone, while more inerts in the coal reduced the width. The carbonization pressure induced 'by volatiles trapped in viscous products ex-panded the plastic zone increasing its width. Broader temperature distribution in the pack-ed coal which was brought about by the migration of fused coal of high fluidity into the zone of lower temperature increased the width, practically by the fusion and dissolution of coal particle by the aid of coal fluid. Such all factors related to the carbonization properties of coals are compared with their petrographic composition and reflectance.
