Tsai [28] reported a treatment of silicon sawing wastes: the Si and SiC-based or Al2O3-based abrasives in the sawing waste are separated by electrophoresis and gravitational settling at the iso- electric point of Si or abrasives. The recovered material with high Si content can be considered as a new Si source for solar cell, and the abrasives can be reused in the sawing process. Wang et al. [29] reported a novel method to separate silicon and silicon carbide from kerf loss slurry by Al–Si alloying process. The kerf loss slurry was washed and dried, and then aluminum was added on the top of the dry powder mixture containing Si and SiC. The Al–Si alloying process was performed in argon atmosphere using a vacuum carbon tube furnace at 1773 K.