2-03　Effects of Coal Particle Diameter on Ash content and Mineral Liberation Characteristics of Coarse Pulverized Coal

Abstract

In the present study, mineral liberation characteristics of each diameter range were estimated by sieving and sink-float separation. The results show that the ash formed at a low temperature is suitable for ash property analysis of coal because the clay and carbonate minerals alter at a high temperature. It was found that the sieving could be used to narrow down the coal diameter range of high ash content and high ash mass distribution. Therefore, efficient demineralization seems to be achieved by classifying the coal diameter range with high ash mass using physical properties with large differences between ash and combustible contents such as the specific gravity.