Sorting out the test data of viscosity-temperature properties for coal ash produced from coal gasification

it has been discovered that a linear relationship is existing between log(n/(T-Ts)) and 1/(T-Ts) in the event of viscosity of coal ash η150 Pa·S.At the same time

it has been deduced that the Ts to be the solidifying temperature of ash at time the linear relationship is existing between log(η/(T/Ts)) and 1/(T-Ts).Adopting multivariate linear regression

and comprehensively considering influence of components SiO2

Al2O3

Fe2O3

CaO

and Na2O etc.

an empiric formula for prediction of the viscosity has been obtained.The prediction model has been examined by using three coal sorts.the results show that the predicted viscosity of ash tallies well with the test value.