Factors influencing purification of molten aluminum alloy by electro-flux have been investigated byorthogonal testing. Optimized processing parameters and remarkable characters among different influential factors were determined by range analysis and variance analysis of experimental data using inclusion contents in molten aluminum as referent index. Meanwhile

the purified mechanism of electro-flux has been approached. The results show that the dominant factor influencing purified effects is flux thickness. The optimized processing parameters are as follows: flux thickness of 30 mm

liquid aluminum diameter of 7 mm

current of 15 A and refining temperature at 700℃.