Effect of bulk density of coking coal on Audibert-Arnu dilatation
Abstract：The coal bulk density significantly influences the coal dilatation during the coking process. Based on typical samples of Xinjian 1/3 and Taoshan coking coals from Qitaihe（ Heilongjiang Province）, the effects of bulk density on the Audibert-Arnu dilatation behavior including initial softening temperature, dilatation starting temperature, maximum dilatation and variation of Gb factor were investigated. Experimental results demonstrate that higher coal bulk density improves the initial soften temperature but decreases the dilatation starting temperature. When the bulk density is in- creased from 0. 88 to 1.19 t/m3 ,the initial soften temperature of Xinjian coal and Taoshan coal is increased by 30 and 14℃, respectively. But the starting dilatation temperature of Xinjian coal and Taoshan coal is lowered by 19 and 15 ℃ ,respectively. Higher bulk density clearly increases the percent dilatation and its temperature range. Gh factor of the coals is also increased with the coal bulk density.
Keywords：bulk densitycoking coalAudibertAmu dilatationdilatation propertieGb factor
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 332-335 )