Effects of Coal Characteristics on the Properties of Coal Water Slurry

Abstract

ABSTRACT The effects of coal characteristics on the properties of coal water slurry (CWS) were systemically studied using sixteen Chinese coals of different ranks from lignite to anthracite. The correlation between coal properties and CWS characteristics were investigated by multivariate progressive regression analysis. CWS properties examined in this study included slurryability (concentration of slurry that gives an apparent viscosity at 1200 mPa · s at a shear rate of 28.38 s−1), rheological behavior (represented by a flow index), and static stability (days for formation of soft sediment). Coal properties examined in the study included coal rank, air equilibrium moisture (Mad), maximum moisture holding capacity (MHC), ash content, surface properties, petrographic macerals, pore structure, and adsorption characteristics of dispersants.