Boron Removal from Metallurgical-Grade Silicon Using CaO-SiO2 Slag

摘要：

　　The removal of boron impurity from metallurgical-grade silicon for solar cell application in slag system of CaO-SiO2 is investigated.The experiments are conducted in an electromagnetic induction furnace which is used to heat.The distribution coefficient of boron(LB)between slag and silicon phase is particularly examined in terms of the optical basicity of slag.With the increase of optical basicity,LB increases to a local maximum value of 1.58 when the optical basicity is 0.71 after getting to the minimum value of 0.72 when the optical basicity is 0.56.In that above optical basicity of 0.71,LB decrease sharply which indicates that increasing the basicity of slag is not always effective in boron removal from silicon.

关键词： metallurgical-grade silicon slag refining distribution coefficient boron CaO-SiO2

作者: DING Zhao WEI Kui-xian MA Wen-hui WU Ji-jun XIE Ke-qiang ZHOU Yang

作者单位: The National Engineering Laboratory for Vacuum Metallurgy,Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,P.R.China;Engineering Research Center for Silicon Metallurgy and Silicon Materials of Yunnan Provincial Universities,Kunming University of Science and Technology,Kunming 650093,P.R.China

会议类型: 国际会议

会议名称: The 7th International Conference on Electromagnetic Processing of Materials(第七届冶金与材料电磁过程国际大会)

会议地点: 北京

会议语种:英文

页码: 1-4

在线出版日期: 2012-10-22（万方平台首次上网日期，不代表论文的发表时间）