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Impurities Removal from Metallurgical-Grade Silicon by Combined Sn-Si and Al-Si Refining Processes
Hu, Lei1,2; Wang, Zhi3; Gong, Xuzhong3; Guo, Zhancheng4,5; Zhang, Hu6,7
2013-08-01
Source PublicationMETALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
Volume44Issue:4Pages:828-836
AbstractThe purification of metallurgical-grade silicon (MG-Si) by combined solvent refining processes has been studied. The final high-purity silicon was recovered through Sn-Si refining and Al-Si refining processes in sequence after acid leaching, and the removal mechanism of impurities was explored. Inductively coupled plasma (ICP) chemical analysis revealed the concentrations of main impurities including B and P, and typical metallic impurities except for solvents Sn and Al were reduced to below 1 ppmw. The final removal efficiencies of B and P were 97.7 pct and 99.8 pct, respectively, and those of most metallic impurities were above 99.9 pct. SEM analysis showed that P-containing phases (Al-Ca-Mg-Si-P and Al-Si-P) formed on the surface of refined Si after Sn-Si refining and Al-Si refining, which was confirmed to be the main approach for P removal. It was also found that the formation of binary silicide such as Fe3Si7 and Mn11Si19 or multicomponent phases such as Ca-Mg-Si phase occurred during the solvent refining process, and they segregated on the grain boundaries in Si or attached to the surface of Si, which led to high removal efficiency of metallic impurities by the solvent refining process.
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
Language英语
WOS KeywordPURIFICATION ; SOLIDIFICATION ; ELEMENTS ; MELT ; BORON
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000321669900008
Citation statistics
Cited Times:36[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/13463
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Natl Engn Lab Hydromet Cleaner Prod Technol, Inst Proc Engn, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Natl Engn Lab Hydromet Cleaner Prod Technol, Inst Proc Engn, Beijing 100864, Peoples R China
4.Chinese Acad Sci, Natl Engn Lab Hydromet Cleaner Prod Technol, Inst Proc Engn, Beijing 100083, Peoples R China
5.Univ Sci & Technol Beijing, State Key Lab Adv Met, Beijing 100083, Peoples R China
6.Chinese Acad Sci, Natl Engn Lab Hydromet Cleaner Prod Technol, Inst Proc Engn, Kunming 65000, Peoples R China
7.Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 65000, Peoples R China
Recommended Citation
GB/T 7714
Hu, Lei,Wang, Zhi,Gong, Xuzhong,et al. Impurities Removal from Metallurgical-Grade Silicon by Combined Sn-Si and Al-Si Refining Processes[J]. METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE,2013,44(4):828-836.
APA Hu, Lei,Wang, Zhi,Gong, Xuzhong,Guo, Zhancheng,&Zhang, Hu.(2013).Impurities Removal from Metallurgical-Grade Silicon by Combined Sn-Si and Al-Si Refining Processes.METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE,44(4),828-836.
MLA Hu, Lei,et al."Impurities Removal from Metallurgical-Grade Silicon by Combined Sn-Si and Al-Si Refining Processes".METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE 44.4(2013):828-836.
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