Recycling of diamond-wire sawing silicon powder by direct current assisted directional solidification

doi:10.1016/j.wasman.2022.12.023

CORC > 海洋研究所 > 中国科学院海洋研究所

	Recycling of diamond-wire sawing silicon powder by direct current assisted directional solidification
	Hu, Zhiqiang 3,4; Wang, Guoliang 3,4; Li, Jiayan 3,4; Tan, Yi 3,4; Liu, Yao 2; Li, Pengting 1,3,4
刊名	WASTE MANAGEMENT
	2023-02-15
卷号	157 页码:190-198
关键词	Photovoltaic waste Kerf loss silicon Directional solidification Joule heat Recovery
ISSN号	0956-053X
DOI	10.1016/j.wasman.2022.12.023
通讯作者	Li, Pengting(ptli@dlut.edu.cn)
英文摘要	As the unavoidable by-products in the production of solar cells, the recycling and reuse of diamond-wire sawing silicon powder (DWSSP) have always been a key issue in the solar energy industry. However, until now, there is no effective method to achieve effective recovery of high-purity silicon. In this work, a new method was proposed to achieve the recycling of DWSSP. Direct current, as an external means, was introduced into the recycling process of DWSSP, and its influence mechanism on impurity removal process was also discussed. By optimizing the local temperature gradient at the front of the Solid-Liquid interface, and the impurity diffusion behavior at the front of the interface was improved. After purification, the impurity content in the silicon ingot is reduced significantly. Among them, Al, as the main metal impurity element was reduced to less than 5ppmw (from 13580ppmw), and Ni (80.78ppmw), Fe (57.60ppmw), Ti (5.79ppmw), etc. decreased to less than 1ppmw. This work improved the purification efficiency of DWSSP, and put forward an optimized recycling method, which is expected to realize the direct reuse of DWSSP in the photovoltaic industry.
资助项目	National Natural Science Foundation of China ; Science and Technology Innovation Fund of Dalian ; Fundamental Research Funds for the Central Universities ; [51974057] ; [2019RT13] ; [2020RQ123] ; [DUT21LAB111] ; [DUT21ZD404]
WOS研究方向	Engineering ; Environmental Sciences & Ecology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000903728700002
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/181070]
专题	中国科学院海洋研究所
通讯作者	Li, Pengting
作者单位	1.Dalian Univ Technol, Sch Mat Sci & Engn, 2 Linggong Rd, Dalian 116024, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 3.Key Lab Energy Beam Met & Adv Mat Preparat Liaonin, Dalian 116024, Peoples R China 4.Dalian Univ Technol, Key Lab Mat Modificat Laser Ion & Electron Beams, Sch Mat Sci & Engn, Minist Educ, Dalian 116024, Peoples R China
推荐引用方式 GB/T 7714	Hu, Zhiqiang,Wang, Guoliang,Li, Jiayan,et al. Recycling of diamond-wire sawing silicon powder by direct current assisted directional solidification[J]. WASTE MANAGEMENT,2023,157:190-198.
APA	Hu, Zhiqiang,Wang, Guoliang,Li, Jiayan,Tan, Yi,Liu, Yao,&Li, Pengting.(2023).Recycling of diamond-wire sawing silicon powder by direct current assisted directional solidification.WASTE MANAGEMENT,157,190-198.
MLA	Hu, Zhiqiang,et al."Recycling of diamond-wire sawing silicon powder by direct current assisted directional solidification".WASTE MANAGEMENT 157(2023):190-198.