Removal of phosphorus from metallurgical grade silicon by Ar-H_2O gas mixtures

作     者：李峰 邢鹏飞 李大纲 庄艳歆 涂赣峰 Feng LI;Peng-fei XING;Da-gang LI;Yan-xin ZHUANG;Gan-feng TU

作者机构：东北大学材料与冶金学院沈阳110004 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2013年第23卷第11期

页      面：3470-3475页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：Project(51074043)supported by the National Natural Science Foundation of China Project(2011BAE03B01)supported by the National Key Technology R&D Program of China 

主　　题：metallurgical grade silicon gas blowing phosphorus thermodynamics 

摘      要：The removal of phosphorus in metallurgical grade silicon （MG-Si） by water vapor carried with high purity argon was examined. The effect of the nozzle types, refining time, refining temperature, refining gas temperature and refining gas flow rate on the phosphorus removed was investigated by the self-designed gas blowing device. The optimal refining conditions are nozzle type of holes at bottom and side, refining time of 3 h, refining temperature of 1793 K, refining gas temperature of 373 K, refining gas flow rate of 2 L/min. Under these optimal conditions, the phosphorus content in MG-Si is reduced from 94×10^-6 initially to 11×10-6 （mass fraction）, which indicates that gas blowing refining is very effective to remove phosphorus in MG-Si.