Abstract:In this paper, silicon diamond-wire saw cutting waste was used to prepare high-purity silicon. Firstly, the characterization of the cutting waste were analyzed by X-ray fluorescence spectrometer、X-ray diffractometer、Laser particle analyzer、Scanning electron microscope and Chemical analysis method. The results show that the main chemical element is Si, and contain small amounts of metallic impurities such as Al, Na, Ca and Fe; The main phase is silicon; The average particle size of 1.17 μm; The microstructure is patch and highly polymerization; The content of each composition is 82.53 wt% Si, 13.91 wt% SiO2, 3.56 wt% others. Then, the micro silicon powder waste was pelletized and then melted in induction furnace in atmosphere. Silicon ingot with 99.61% was prepared and the recovery rate was 60.32%. The results indicate that it is prospective to retrieve the silicon powder from diamond-wire cutting slurry waste by induction melting in atmosphere.