Multiple Slag Operation on Boron Removal from Metallurgical-Grade Silicon Using Na2O-SiO2 Slags

被引：41

作者：

Fang, Ming ^{[1
]}

Lu, Chenghao ^{[1
]}

Huang, Liuqing ^{[1
]}

Lai, Huixian ^{[1
]}

Chen, Juan ^{[1
]}

Yang, Xiaobing ^{[1
]}

Li, Jintang ^{[1
]}

Ma, Wenhui ^{[2
]}

Xing, Pengfei ^{[3
]}

Luo, Xuetao ^{[1
]}

机构：

[1] Xiamen Univ, Coll Mat, Xiamen 361005, Peoples R China

[2] Kunming Univ Sci & Technol, Fac Mat & Met Engn, Kunming 650093, Peoples R China

[3] Northeastern Univ, Sch Mat & Met, Shenyang 110004, Peoples R China

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2014年 / 53卷 / 30期

基金：

中国国家自然科学基金; 美国国家科学基金会;

关键词：

MOLAR VOLUMES; LIQUID SILICATES; OPTICAL BASICITY; PURIFICATION; BEHAVIOR; SOLVENT;

D O I：

10.1021/ie404427c

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The removal of boron from metallurgical-grade silicon by Na2O-SiO2 slag refining was investigated. The final content of boron in refined silicon was examined under different conditions of temperature, slag composition, holding time, mass ratio of slag to silicon, and slag refining times. The content of boron in silicon decreased from 10.6 to 0.65 ppmw by slag treatment in one time, and increasing slag refining times was beneficial for removing boron at the conditions of the small mass ratio of slag to silicon and short holding time. Moreover, the removal mechanism of boron was also discussed. The primary removal mechanism of boron was that a large amount of boron was oxidized and then volatilized to the atmosphere in the form of boron oxides. The mass transfer coefficient of boron from silicon to slag was connected with the radius of silicon droplet in the slag refining process.

引用

页码：12054 / 12062

页数：9

共 31 条

[1] THE STRUCTURE OF THE LIQUID SILICATES - PARTIAL MOLAR VOLUMES AND EXPANSIVITIES [J].