Abstract: Pro/E software was used for geometric modeling of coal slurry settlement thickener and according to the principle of computational fluid dynamics，used RNG k-ε turbulent model and the mixture multiphase model to simulate the internal flow field in thickener and the coal slurry settlement distribution. The conclusion from the simulation was used to fit the mathematical model formulas of coal slurry settlement distribution，providing an easy way for an optimal structure design of thickener from theory.

Key words: Thickener, Coal slurry, Settlement flow field, Concentration distribution, Numerical simulation