抄録
Coal dust emission from and spontaneous combustion of coal storage piles are becoming problems of increased importance as the volume of coal used and stored is expanding. Research results concerning these problems and preventive measures are summarized as follows:
1. Coal dust emission is caused by dispersion of small particles of diameters less than 200 micrometers from coal piles. Methods for predicting coal dust emission quantities during operational storage were developed. Also, effectiveness of control methods including water sprays and wind shields were assessed.
2. Spontaneous combustion of coal is caused by low temperature oxidation of coal. It was observed that pile temperatures must rise to 80 to 90 degrees C and be maintained for a period of time for spontaneous combustion to occur. A system using infra-red imaging apparatus was developed to predict the probability of spontaneous combustion in coal piles.
