Prediction of the Coking Property of Coal by Microscopic Analyses

Abstract

We attempted the application of Schapiro's method to the prediction of Drum Index of coke made by many kinds of single coal, Informations obtained are as follows;1) It is possible to predict the DI from from the petrographic study of coal, but the precision of the estimation was not so good, though high correlation was found between estimated DI3015 and determined DI3015, (r=0. 92**).It suggests that the property presented by Drum Test is differ from that of Tumbler Test. It is necessary, therefore, to perform more detailed studies to obtain the precise prediction system of DI3015.2) It was not impossible to predict the micro-strength or reactivity of coke from the petrographic study of coal, but the precision of the estimation was also not so good.3) Various coking coals can be stratified by two parameter-Reflectance of Vitrinites and Gieseler max. fluidity of coal-.This statifying system is useful to pre-evaluation of coking coals, especially in the case of large quantity of sample can not be obtained.