Prediction method for Audibert-Arnu dilatation(b)of blended coal
LIU Yang
LI Dongtao
QU Shiguang
DAI Xin
ZHAO Peng
GUO Deying
Abstract：The Audibert-Arnu dilatation effectively reflects the swelling properties of coal and serves as one of the critical indicators for assessing the caking and coking properties of coking coal.However,the practical application of this parameter has been significantly constrained due to the inability to predict the Audibert-Arnu dilatation(b)in blended coals.Based on 9 types of coking coal,the author conducted testing on the bonding performance indicators of single coal and blended coal for nearly 300 schemes including two,three,four,nine types,and studied the rela-tionship between each indicator.Through analytical studies on seven individual coal types and their binary blends,it was discovered that the measured Audibert-Arnu dilatation(b)of binary blended coal exhibits strong correlations not only with its additive values and initial softening temperature T1,but also with the summed caking index values.Con-sequently,the summed values of the caking index and Audibert-Arnu dilatation(b)were successfully employed to predict the Audibert-Arnu dilatation(b).Building on this binary coal blending research,further investigations into ternary blends led to the development of a predictive model for Audibert-Arnu dilatation in ternary blended coals.This model was subsequently validated using experimental data from quaternary and nine-component blended coals.
Keywords：blended coalAudibert-Arnu dilatationcaking indexsum up valueprediction method
Publication Date：2026-01-31
Pages：9( 72-80 )