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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.