CAS OpenIR
Occurrence State and Dissolution Mechanism of Metallic Impurities in Diamond Wire Saw Silicon Powder
Yang, Shicong1; Wan, Xiaohan1; Wei, Kuixian1,3; Ma, Wenhui1,3,4; Wang, Zhi2
2020-08-24
Source PublicationACS SUSTAINABLE CHEMISTRY & ENGINEERING
ISSN2168-0485
Volume8Issue:33Pages:12577-12587
AbstractThe facilitation of metallic impurities removal via acid leaching pretreatment plays a key role in silicon recovery from diamond wire saw silicon powder (DWSSP) waste. Disappointingly, the occurrence state and dissolution mechanism of the metallic impurities present in DWSSP have not yet been revealed. For this reason, in this study, three different kinds of raw DWSSP were used for acid leaching tests and leaching behavior verification to investigate the dissolution mechanism. After two-stage acid leaching with 4 M HCl and 2 M HCl + 2.5 M HF, the results indicate that the removal efficiency was superior to that of other previously reported leaching processes. Furthermore, two occurrence states of metallic impurities present in DWSSP were defined based on their different dissolution behaviors, and the intrinsic relationship between dissolution behavior and the thinning process of the amorphous SiO2 shell was derived. The findings indicate that the first type of impurity was more easily dissolved in HCl solution; however, the second type of retained metallic impurity was restricted by the SiO2 shell barrier and was removed by the added HF solution. For this reason, the disintegration dissolution of the amorphous SiO2 shell was found to have a significant impact on the facilitation of the removal of impurities retained in DWSSP. The findings of this study are significant for the recovery of silicon from DWSSP with an effective acid leaching flow design.
KeywordDiamond wire saw silicon powder Metallic impurities Occurrence state Dissolution mechanism Acid leaching process
DOI10.1021/acssuschemeng.0c03912
Language英语
WOS KeywordKERF-LOSS SILICON ; HYDROGEN DESORPTION ; REMOVAL ; WASTE ; KINETICS ; SLURRY ; FABRICATION ; RECOVERY ; ALLOY ; BORON
Funding ProjectNational Key R&D Program of China[2018YFC1901801] ; National Key R&D Program of China[2018YFC1901805] ; 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 AreaChemistry ; Science & Technology - Other Topics ; Engineering
WOS SubjectChemistry, Multidisciplinary ; Green & Sustainable Science & Technology ; Engineering, Chemical
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:000563783100026
PublisherAMER CHEMICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/41854
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, Yunnan, Peoples R China
2.Chinese Acad Sci, Key Lab Green Proc & Engn, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
3.Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, Kunming 650093, Yunnan, Peoples R China
4.Silicon Mat Ind Res Inst Innovat Ctr Yunnan Prov, Kunming 650093, Yunnan, Peoples R China
Recommended Citation
GB/T 7714
Yang, Shicong,Wan, Xiaohan,Wei, Kuixian,et al. Occurrence State and Dissolution Mechanism of Metallic Impurities in Diamond Wire Saw Silicon Powder[J]. ACS SUSTAINABLE CHEMISTRY & ENGINEERING,2020,8(33):12577-12587.
APA Yang, Shicong,Wan, Xiaohan,Wei, Kuixian,Ma, Wenhui,&Wang, Zhi.(2020).Occurrence State and Dissolution Mechanism of Metallic Impurities in Diamond Wire Saw Silicon Powder.ACS SUSTAINABLE CHEMISTRY & ENGINEERING,8(33),12577-12587.
MLA Yang, Shicong,et al."Occurrence State and Dissolution Mechanism of Metallic Impurities in Diamond Wire Saw Silicon Powder".ACS SUSTAINABLE CHEMISTRY & ENGINEERING 8.33(2020):12577-12587.
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