CAJ | 학술논문

研究从太阳能晶体硅切割废料中制取高纯硅。分析切割废料的组成、粒度分布等，利用物理沉降法对废料中的硅粉进行富集，然后经酸洗除杂。研究酸洗工艺参数如酸洗时间、温度、固液比等对提纯效率的影响，并优化工艺参数。最后将酸洗除杂的硅富集料进行真空高温熔炼获得含99.96%Si、1.1×10-6B及4.0×10-6 P(质量分数)的高纯硅。结果表明：从晶体硅切割废料中回收太阳能多晶硅是未来的一个重要发展方向。
연구종태양능정체규절할폐료중제취고순규。분석절할폐료적조성、립도분포등，이용물리침강법대폐료중적규분진행부집，연후경산세제잡。연구산세공예삼수여산세시간、온도、고액비등대제순효솔적영향，병우화공예삼수。최후장산세제잡적규부집료진행진공고온용련획득함99.96%Si、1.1×10-6B급4.0×10-6 P(질량분수)적고순규。결과표명：종정체규절할폐료중회수태양능다정규시미래적일개중요발전방향。
The recovery of high-purity Si from the cutting slurry waste of SoG-Si was investigated. The composition and size distribution of cutting waste were characterized. The Si-rich powders were obtained from the cutting waste using a physical sedimentation process, and then further purified by removing impurity using acid leaching. The effects of process parameters such as acid leaching time, temperature and the ratio of solid to liquid on the purification efficiency were investigated, and the parameters were optimized. Afterwards, the high-purity Si ingot was obtained by melting the Si-rich powders in vacuum furnace. Finally, the high purity Si with 99.96%Si, 1.1×10-6 boron (B), and 4.0×10-6 phosphorus (P) were obtained. The results indicate that it is feasible to extract high-purity Si, and further produce SoG-Si from the cutting slurry waste.