- Boron removal from silicon by slag refining using Na2O-SiO2 in industrial applications
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- 论文类型： 期刊论文
- 发表时间： 2018-01-01
- 发表刊物： SEPARATION SCIENCE AND TECHNOLOGY
- 收录刊物： SCIE
- 卷号： 53
- 期号： 13
- 页面范围： 2144-2149
- ISSN号： 0149-6395
- 关键字： B removal; metallurgical-grade silicon; slag refining; thermodynamic analysis; kinetic analysis
- 摘要： Boron (B) removal by slag refining using Na2O-SiO2 was investigated in industrial applications. The experimental results showed that the reasonable ratio range of slag to silicon is about 0.7-0.8; the suitable holding time is about 30min; the concentration of B is reduced from 1.90 ppmw to 0.17 ppmw by three times slag refining; and the removal efficiency of B reaches 91.1%. Moreover, it is discussed that B in silicon is more inclined to be oxidized by Na2O than SiO2 according to thermodynamic analysis and then volatilized to the atmosphere in the form of Na2B2O4 according to kinetic analysis.
