Li Xiufeng, Lv Guoqiang, Ma Wenhui, Li Tai, Zhang Ruifeng, Zhang Jiahao, Li Shaoyuan, Lei Yun
Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; National Engineering Laboratory for Vacuum Metallurgy, Kunming 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming 650093, China.
Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; National Engineering Laboratory for Vacuum Metallurgy, Kunming 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming 650093, China.
J Hazard Mater. 2022 Feb 15;424(Pt A):127389. doi: 10.1016/j.jhazmat.2021.127389. Epub 2021 Sep 30.
The installed capacity of solar photovoltaic power generation has grown rapidly in the last decades. With the rapid development of the photovoltaic industry, the demand for Si wafers, which are integral to solar cells, has grown dramatically. In the manufacture of Si wafers, the traditional loose abrasive sawing method (LAS) has gradually been replaced by the diamond-wire sawing method (DWS). However, during the diamond-wire wafer sawing process, approximately 35%-40% of the crystalline Si becomes diamond-wire sawing silicon waste (DSSW). Therefore, DSSW represents a resource worth recycling due to its low levels of impurities and high silicon content. Furthermore, recycling prevents DSSW from becoming environmental pollution and eliminates disposal costs. This review provides an overview of the recycling and reutilization of DSSW based on an extensive literature survey. In view of the rapid increase in DSSW production and current purification bottleneck of < 5 N, in-situ utilizations may be more feasible, such as the preparation of silicon containing alloys and functional ceramic materials, which not only frees from the complex purification process, but has a huge demand. Finally, based on the review, future prospects are proposed, aiming to identify research directions with significant potential in the resource utilization of DSSW and other silicon wastes.
在过去几十年中，太阳能光伏发电的装机容量迅速增长。随着光伏产业的快速发展，对太阳能电池不可或缺的硅片的需求急剧增长。在硅片制造中，传统的松散磨料切割方法（LAS）已逐渐被金刚石线切割方法（DWS）所取代。然而，在金刚石线切割硅片的过程中，约35%-40%的晶体硅会变成金刚石线切割硅废料（DSSW）。因此，由于DSSW杂质含量低且硅含量高，它是一种值得回收利用的资源。此外，回收利用可防止DSSW造成环境污染并消除处置成本。本文通过广泛的文献调研，对DSSW的回收利用进行了综述。鉴于DSSW产量的快速增长以及目前小于5N的提纯瓶颈，原位利用可能更可行，例如制备含硅合金和功能陶瓷材料，这不仅无需复杂的提纯过程，而且需求巨大。最后，基于该综述，提出了未来展望，旨在确定在DSSW和其他硅废料资源利用方面具有巨大潜力的研究方向。
