The primary silicon particles in Al-17 Si-4.5 Cu melt were simulated as solid inclusions in the molten metal.Isothermal separation of inclusion particles from the melt was performed with super-gravity field

and force analysis and theoretical calculation of the particles were also investigated to understand the directional separation behaviors of solid particles in the melt under different gravity fields.The results reveal that

the supergravity field can enhance greatly the effect of directional separation of inclusion particles in the melt.Besides

the separating effect of the primary silicon becomes more desirable with the increase of the gravity coefficient.When the gravity coefficient G=1

the balanced moving velocity of the silicon particle with diameter of 30μm is 6.08×10-5 m/s

and the separation efficiency of the particle is merely 11.01%.However

under the condition of G=500

the moving velocity of the particle reaches 3.04×10-2 m/s

and the separation efficiency can reach up to71.91%.