| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for producing ashless coal, with which the yield of the ashless coal is improved even when the ashless coal is produced in a coal-producing area where there is no room for selecting various kinds of raw materials (coal). <P>SOLUTION: A raw material fractionation process to fractionate the coal according to respective predetermined particle sizes is added to the production process of the ashless coal. In order to conduct a series of treatment processes such as an extraction process etc., by using the coal in a predetermined particle size range determined based on the analytical result of the raw material analysis stage to analyze properties of the coal according to the respective predetermined particle sizes, the coal is fractionated by the raw material fractionation process according to the respective particle sizes. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
