The segregation behavior of impurities in metallurgical grade silicon (MG-Si) determines the removal efficiency of impurities during Al-Si solvent refining process. Considering the interference of other coexisting impurity elements, MG-Si was selected as the initial material to evaluate the effective segregation ratios of impurities between solid Si and Al-Si melt. The effective segregation ratios of main metallic impurities, such as Ti, Fe, Mn, between solid silicon and Al-Si melt were investigated by theoretical and experimental methods respectively. These results demonstrated that the effective segregation ratios of Ti, Fe and Mn all decreased with the increasing temperature at the range of 1023-1473 K, which are helpful to evaluate the realistic segregation ability of metallic impurities during the Al-Si solvent refining process. (C) 2014 Elsevier B.V. All rights reserved