制备了不同细度的实验煤粉和煤焦，并对其物理化学特性进行了实验研究。
Various size of pulverized coal and char were prepared for experiments, also their physical and chemical characters were experimentally analyzed.
该文通过煤粉在沉降炉中的燃烧，研究燃烧过程中煤焦的膨胀特性及其对颗粒物形成的影响。
Pulverized coals were burnt in a laboratory-scale drop tube furnace to study the swelling characteristic of char particles and its influence on emission of particulate matter (PM) during combustion.
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