In order to systematically analyze mixing flow pattern of gas from a rotary kiln and tertiary airs in a precalciner and its influence on movements of pulverized and powder particles, laws of turbulence intensity, vorticity, helicity and particle motion along flow paths were studied by numerical simulations, which were the turbulence model and the particle tracking model. The results show that (1) combined actions of exhaust gases from the rotary kiln and tertiary airs resulted in strong turbulent flow patterns in the mixing zone; (2) strong fluctuations of particles occurred in the turbulent zone; (3) the combined actions of exhaust gases from the rotary kiln and tertiary airs could stimulate rotational characteristics of particles around an axis with variations of the side wall; (4) pulverized coal and powder particles in the precalciner carried out spiral up or down movements.