Impurities Removal from Metallurgical-Grade Silicon by Combined Sn-Si and Al-Si Refining Processes

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	Impurities Removal from Metallurgical-Grade Silicon by Combined Sn-Si and Al-Si Refining Processes
	Hu, Lei 1,2; Wang, Zhi 3; Gong, Xuzhong 3; Guo, Zhancheng 4,5; Zhang, Hu 6,7
刊名	METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
	2013-08-01
卷号	44 期号:4 页码:828-836
英文摘要	The 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.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
研究领域[WOS]	Materials Science ; Metallurgy & Metallurgical Engineering
关键词[WOS]	PURIFICATION ; SOLIDIFICATION ; ELEMENTS ; MELT ; BORON
收录类别	SCI
语种	英语
WOS记录号	WOS:000321669900008
公开日期	2015-05-27
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/13463]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.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
推荐引用方式 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.