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Silicon recycling and iron, nickel removal from diamond wire saw silicon powder waste: Synergistic chlorination with CaO smelting treatment
Yang, Shicong1; Wan, Xiaohan1; Wei, Kuixian1,2; Ma, Wenhui1,2,3; Wang, Zhi4
2021-08-01
Source PublicationMINERALS ENGINEERING
ISSN0892-6875
Volume169Pages:13
AbstractDuring 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.
KeywordDiamond wire saw silicon powder waste Silicon recycling Iron and nickel removal Chloride and CaO addition Smelting treatment
DOI10.1016/j.mineng.2021.106966
Language英语
WOS KeywordSLAG ; MECHANISM ; METALS ; SALTS ; ALLOY ; BORON ; GLASS
Funding ProjectNational 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 Research AreaEngineering ; Mineralogy ; Mining & Mineral Processing
WOS SubjectEngineering, Chemical ; Mineralogy ; Mining & Mineral Processing
Funding OrganizationNational 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
WOS IDWOS:000659523600001
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/49124
Collection中国科学院过程工程研究所
Corresponding AuthorWei, Kuixian; Ma, Wenhui
Affiliation1.Kunming Univ Sci & Technol, Natl Engn Lab Vacuum Met, Fac Met & Energy Engn, Kunming 650093, Peoples R China
2.Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, Kunming 650093, Peoples R China
3.Silicon Mat Ind Res Inst Innovat Ctr Yunnan Prov, Kunming 650093, Yunnan, Peoples R China
4.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Natl Engn Lab Hydrometallurg Cleaner Prod Technol, Beijing 100190, Peoples R China
Recommended Citation
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.
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