Evaporation removal of boron from metallurgical-grade silicon using CaO-CaCl2-SiO2 slag

Wang, Ye, Ma, Xiaodong and Morita, Kazuki (2014) Evaporation removal of boron from metallurgical-grade silicon using CaO-CaCl2-SiO2 slag. Metallurgical and Materials Transactions B, 45B 2: 334-337. doi:10.1007/s11663-014-0031-1


Author Wang, Ye
Ma, Xiaodong
Morita, Kazuki
Title Evaporation removal of boron from metallurgical-grade silicon using CaO-CaCl2-SiO2 slag
Formatted title
Evaporation removal of boron from metallurgical-grade silicon using CaO-CaCl2-SiO2 slag
Journal name Metallurgical and Materials Transactions B   Check publisher's open access policy
ISSN 1073-5615
1543-1916
Publication date 2014-04-01
Sub-type Article (original research)
DOI 10.1007/s11663-014-0031-1
Open Access Status Not yet assessed
Volume 45B
Issue 2
Start page 334
End page 337
Total pages 4
Place of publication New York, NY, United States
Publisher Springer New York
Language eng
Subject 3104 Condensed Matter Physics
2506 Metals and Alloys
2211 Mechanics of Materials
2505 Materials Chemistry
Abstract In order to optimize the B removal during slag-refining process for solar-grade silicon production, a new process for the removal of B in molten Si was proposed based on the principle of oxidized chlorination and evaporation. B can be generated and evaporated in the form of B-containing gas on the basis of calculated vapor pressures of forming species in the BO 5-CaCl slag at 1723 K (1450 °C). CaO-SiO-CaCl slag was selected to remove B in molten Si. In the slag-refining experiments, compared with the binary systems of CaO-CaCl and SiO -CaCl slag, the ternary slag system CaO-SiO -CaCl showed a better potential (86 pct) for B removal. Furthermore, the relationships among the removal efficiency, the estimated evaporative efficiency, and the partition ratio were all discussed.
Formatted abstract
In order to optimize the B removal during slag-refining process for solar-grade silicon production, a new process for the removal of B in molten Si was proposed based on the principle of oxidized chlorination and evaporation. B can be generated and evaporated in the form of B-containing gas on the basis of calculated vapor pressures of forming species in the BO1.5-CaCl2 slag at 1723 K (1450 °C). CaO-SiO2-CaCl2 slag was selected to remove B in molten Si. In the slag-refining experiments, compared with the binary systems of CaO-CaCl2 and SiO2-CaCl2 slag, the ternary slag system CaO-SiO2-CaCl2 showed a better potential (86 pct) for B removal. Furthermore, the relationships among the removal efficiency, the estimated evaporative efficiency, and the partition ratio were all discussed.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2015 Collection
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 19 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 18 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Tue, 01 Apr 2014, 00:54:28 EST by Xiaodong Ma on behalf of School of Chemical Engineering