Grain size distribution of Isalnita power plant lignite ash and elemental composition of size classes

摘要

Grain size analysis of 48 samples of Isalni(a power plant lignite ash revealed a mixture of three populations, each of them showing best fit to Weibull distribution with smallest size (X_o) 40, 350 and 740 μm, mean size (x_m) 163, 506 and 1068 μm, exponent (α), 1.42, 2.31 and 0.84, and participation to the whole mass with (p) 49, 23 and 28/100, respectively. The fine population originates, according to the "two phase model of coal", from the mineral, the coarse, from the maceral pseudo-phase, while the middle fraction is presumably formed from extraneous minerals.