Abstract
The fragmentation behavior of pure excluded mineral of illite and pyrite are studied based on the high temperature experiments in a drop tube furnace and mathematical simulation. Experimental conditions are selected as: reaction temperature is 1250°C; mineral particle size is smaller than 300 μm; combustion atmosphere is air. The experimental and calculation results indicate that, illite and pyrite indeed undergo fragmentation, the particle size distribution of two mineral has obvious change and mean diameter for volume decreases after experimentation. A scanning electron microscope is used to analyze illite mineral particle, the raw mineral has sharp angles and no fissures, after experimentation, a portion of the mineral residues has obvious fissures and cracks, others melt and form to sphere, excellent SEM images are obtained. Compared particle size distributions of experimentation with mathematical simulation, the results for illite suggest that a large grain generate two pieces of fragments, whereas a pyrite produces four segments.