CAS OpenIR
Silicon recovery from silicon sawing waste by removal of SiC impurity via CaO-SiO2-Na2O slag absorption
Wang, Dong1; Wang, Zhankui1; Wang, Zhi1; Qian, Guoyu1; Gong, Xuzhong1; Xin, Ling2
2020-01-16
Source PublicationSEPARATION AND PURIFICATION TECHNOLOGY
ISSN1383-5866
Volume231Pages:7
AbstractThe removal of SiC restricts the recycling of silicon from wire sawing waste. Although the silicon in sawing waste can be easily enriched to around 90 wt%, it is difficult to further increase the purity. In this study, silicon ingot was successfully recovered from silicon sawing waste by using a CaO-SiO2-Na2O slag refining method. CaO-SiO2 slag was selected to absorb SiC particles from liquid silicon owing to its excellent wettability on SiC. Na2O was used to decrease the slag viscosity and improve the SiC transfer. SiC mass transfer coefficients in molten slag were calculated for different Na2O contents. The effects of operating variables on SiC removal and silicon yield were investigated, including the Na2O content, refining time, and slag/silicon ratio. The best result was a decrease of SiC content to less than 0.19 wt% from 9.07 wt% in the silicon ingot and a silicon yield of 76.5%.
KeywordSilicon sawing waste Silicon SiC removal Slag absorption
DOI10.1016/j.seppur.2019.115902
Language英语
WOS KeywordKERF-LOSS SLURRY ; BORON REMOVAL ; GRADE SILICON ; CARBIDE ; WETTABILITY ; POWDER
Funding ProjectNational Key R&D Program of China[2018YFC1901804] ; National Natural Science Foundation of China[U1702251] ; National Natural Science Foundation of China[51604255] ; National Natural Science Foundation of China[51604256] ; Fund of State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization[CNMRCUKF1605]
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Key R&D Program of China ; National Natural Science Foundation of China ; Fund of State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization
WOS IDWOS:000486133700029
PublisherELSEVIER
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/30966
Collection中国科学院过程工程研究所
Corresponding AuthorWang, Zhi
Affiliation1.Chinese Acad Sci, Key Lab Green Proc & Engn, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.Henan Yicheng New Energy Co LTD, Kaifeng 475000, Peoples R China
Recommended Citation
GB/T 7714
Wang, Dong,Wang, Zhankui,Wang, Zhi,et al. Silicon recovery from silicon sawing waste by removal of SiC impurity via CaO-SiO2-Na2O slag absorption[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2020,231:7.
APA Wang, Dong,Wang, Zhankui,Wang, Zhi,Qian, Guoyu,Gong, Xuzhong,&Xin, Ling.(2020).Silicon recovery from silicon sawing waste by removal of SiC impurity via CaO-SiO2-Na2O slag absorption.SEPARATION AND PURIFICATION TECHNOLOGY,231,7.
MLA Wang, Dong,et al."Silicon recovery from silicon sawing waste by removal of SiC impurity via CaO-SiO2-Na2O slag absorption".SEPARATION AND PURIFICATION TECHNOLOGY 231(2020):7.
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