| On the basis of standard laboratory coal-water pulp preparation and leached ions determination with IC, the effect of minerals in coal on rheolo-gical properties of coal-water pulp is analyzed by using computer analysis method for seventeen kinds of coals. A conclusion that soluble sulfate minerals(Ca2+, Mg2+) are fatal to the theological property of coal-water pulp is obtained. An absorption model is given to explain effects of Ca2+ and Mg2+. Finally, the promoters are used to remove the unfavorable effects of Ca2+ and Mg2+ |