The force analysis on oxide inclusion in copper melt under super-gravity field was performed

and the equations of moving velocity and distance of inclusion particle along the direction of super gravity were established.The effects of gravity coefficient

inclusion features（size

type

content）and melt temperature on movement behavior of inclusion were also investigated by theoretical calculation under super-gravity field.The theoretical results indicate that directional separation process of oxide inclusion in the melt can be intensified effectively by super-gravity field

where the gravity coefficient

inclusion size and the density difference between inclusion and melt（solid-liquid density difference）have an obvious effect on moving behavior of inclusion particle.Besides

the larger gravity coefficient

particle size and solid-liquid density difference are beneficial to accelerating the floating and removal of inclusion.