Author:Gaigher, JLDate:1977The regional variation of mineral matter to ash ratios for some coal product samples is discussed by means of frequency weighted histograms.Read more
Author:Gaigher, JLDate:1976This report discusses an investigation of radio frequency ashing, micro-sieving in an ultrasonic bath and X-ray diffraction analysis, it is possible to determine the grain-size distribution of the mineral matter in a coal sample.Read more