Name : The 46th Conference of Coal Science
Number : 46
Location : [in Japanese]
Date : November 26, 2009 - November 27, 2009
Pages 28-29
The commonly-used coal analyses, e.g. ultimate and proximate analyses, have no clear correlation with conventional characteristic parameters of coking coal, e.g. maximum fluidity (MF) and total dilatation (TD), especially for low grade coals. In this work, eleven slightly and strongly coking coal were separated into three different molecular weight size fractions without decomposing coal by 1-methylnaphthalene (1-MN) extraction at 350℃. With the assistance of detailed analyses, ultimate analysis, TGA, TMA, and molecular weight distribution (MWD) measurement for the parent coal and the fractions, the possibility of the solvent extraction as a new characterizing method of coking coal was examined. The results showed that the yields of the fractions were significantly different among the coals, but the properties of each fraction were almost independent of the coal types. And the correlation between fraction yield and characteristic parameters of coking coal do exist.
