Silicon recycling and iron, nickel removal from diamond wire saw silicon powder waste: Synergistic chlorination with CaO smelting treatment

doi:10.1016/j.mineng.2021.106966

	Silicon recycling and iron, nickel removal from diamond wire saw silicon powder waste: Synergistic chlorination with CaO smelting treatment
	Yang, Shicong 2; Wan, Xiaohan 2; Wei, Kuixian 2,3; Ma, Wenhui 2,3,4; Wang, Zhi 1
刊名	MINERALS ENGINEERING
	2021-08-01
卷号	169 页码:13
关键词	Diamond wire saw silicon powder waste Silicon recycling Iron and nickel removal Chloride and CaO addition Smelting treatment
ISSN号	0892-6875
DOI	10.1016/j.mineng.2021.106966
英文摘要	During the processing of silicon wafers for photovoltaic power generation, nearly 30-40% of silicon ingot will be lost as diamond wire saw silicon powder (DWSSP) waste; this can result in reduced profits, potential danger, and environmental pollution. Driven by the rapid development of the photovoltaic industry, the demand for highpurity silicon and the production of silicon waste generated during silicon processing will continue to increase. Against this trend, the recycling of silicon from DWSSP waste is a desirable alternative to meet the growing demand for high-purity silicon. In this study, a novel process of chlorination with CaO smelting treatment is first proposed for the recycling of silicon and the removal of Fe and Ni from DWSSP waste. The results of this research indicate that the SiO2 shell can be absorbed by the added CaO, while eutectic NaCl-MgCl2 has a significant effect on the maximum recovery of silicon by reducing the viscosity of the molten slag and the removal of metals through the micro concentration cells. CaO and eutectic NaCl-MgCl2 play a synergistic role in the promotion of silicon separation and the removal of Fe and Ni. Silicon with a purity of 99.83% and a recovery rate of nearly 98.96% was obtained under the smelting conditions of DWSSP:CaO:NaCl:MgCl2 = 150.0:23.42:7.50:8.85 with a holding time of 2 h at 1823 K. This process overcomes the technical bottleneck of the removal of Fe and Ni via smelting treatment, which is favorable for the recycling of silicon from DWSSP waste at the industrial scale.
资助项目	National Key R&D Program of China[2018YFC1901805] ; National Key R&D Program of China[2018YFC1901801] ; Major Science and Technology Projects in Yunnan Province[2019ZE007] ; Reserve Talents of Young and Middle-aged Academic and Technical Leaders in Yunnan Province[2018HB009] ; National Natural Science Foundation of China[51904134] ; Program for Innovative Research Team in University of Ministry of Education of China[IRT-17R48]
WOS关键词	SLAG ; MECHANISM ; METALS ; SALTS ; ALLOY ; BORON ; GLASS
WOS研究方向	Engineering ; Mineralogy ; Mining & Mineral Processing
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000659523600001
资助机构	National Key R&D Program of China ; Major Science and Technology Projects in Yunnan Province ; Reserve Talents of Young and Middle-aged Academic and Technical Leaders in Yunnan Province ; National Natural Science Foundation of China ; Program for Innovative Research Team in University of Ministry of Education of China
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/49123]
专题	中国科学院过程工程研究所
通讯作者	Wei, Kuixian; Ma, Wenhui
作者单位	1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Natl Engn Lab Hydrometallurg Cleaner Prod Technol, Beijing 100190, Peoples R China 2.Kunming Univ Sci & Technol, Natl Engn Lab Vacuum Met, Fac Met & Energy Engn, Kunming 650093, Peoples R China 3.Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, Kunming 650093, Peoples R China 4.Silicon Mat Ind Res Inst Innovat Ctr Yunnan Prov, Kunming 650093, Yunnan, Peoples R China
推荐引用方式 GB/T 7714	Yang, Shicong,Wan, Xiaohan,Wei, Kuixian,et al. Silicon recycling and iron, nickel removal from diamond wire saw silicon powder waste: Synergistic chlorination with CaO smelting treatment[J]. MINERALS ENGINEERING,2021,169:13.
APA	Yang, Shicong,Wan, Xiaohan,Wei, Kuixian,Ma, Wenhui,&Wang, Zhi.(2021).Silicon recycling and iron, nickel removal from diamond wire saw silicon powder waste: Synergistic chlorination with CaO smelting treatment.MINERALS ENGINEERING,169,13.
MLA	Yang, Shicong,et al."Silicon recycling and iron, nickel removal from diamond wire saw silicon powder waste: Synergistic chlorination with CaO smelting treatment".MINERALS ENGINEERING 169(2021):13.