On the premise of fully taking the advantages of conventional roller type slag cooler

such as wide adaptability

simple structure and reliable operation

a combined series cylinder water-cooled slag cooler is designed. Based on discrete element method

a slag movement model is established

and the movement of particles in the cold slag tube is simulated visually by EDEM software. By defining the radial diffusivity

this paper explores the law of the radial diffusion of particles in different material layers. When the filling rate is 25%

the radial diffusivity of the same material layer increases with the rotational speed of the drum. When the rotating speed is 5 r/min

as the filling rate increases

the diffusivity of the active and static zone decreases

while that of the other material layers increases.