Abstract：In order to explore the influence of number of baffles on the powder mixing uniformity of porous ceramics, the Euler two phase flow model was established to analyze the movement state of air and powder, simplifying and setting up a physical model for the powder mixing process and modifying RNG k-εturbulence model, the influence of number of baffles on the axial and radial volume fraction, velocity cloud chart and vector diagram was analyzed, which improved the number of baffles to increase the uniformity of powder mixing. The results show that, when the number of baffles is 1, 2, 3, 4 respectively, the average volume fraction of powder is about 0.25, 0.22, 0.24, 0.26 respectively; the average speed of powder is about0.7, 0.6, 0.5, 0.4 m/s respectively; when the granulation chamber contains two baffles, the back section of the powder density curve is about 2 g/cm³, the fluctuation of density curve is small, and the powder mixing uniformity is higher than the other three. The data shows the accumulation of powder in the two baffles chamber is lowest.

Keywords：porous ceramics; dry granulation; euler two-phase flow; baffle number