Mono-like crystalline silicon ingot with high purity was continuously casted with metallurgical-grade silicon (MG-Si) as feedstock.Our advanced electron beam melting (EBM) system is able to effectively remove volatile impurities by heat source with high energy from the electron gun in vacuum refining part and to continuously allow impurities to segregate at the top of the ingot solidified in directional solidification (DS) part, where the two parts are connected by an overflow of Si melts for undergoing a continuous refining and casting process in a vacuum chamber.