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
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
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
 
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Created: Tue, 01 Apr 2014, 00:54:28 EST by Xiaodong Ma on behalf of School of Chemical Engineering