Abstract
In general, the use of coal having different physical properties from those of design coal in a pulverized coal combustion plant causes ash deposit troubles, such as fouling and slagging. However, from the viewpoint of utilization of low rank coals, flexibilities for various coal types as fuel are going to be required in pulverized coal fired boilers before long. Then, it is important to preliminarily predict mineral particle behaviors in coal combustion process. In this study, their behaviors are studied by use of artificial coal samples which contains included minerals and excluded minerals. Coal samples are burned in a drop tube furnace to sample particles in different conversion ratio and residence time. Then included and excluded minerals are analyzed and classified in particles by CCSEM
