The Distribution of Boron between SiO2–CaO–MgO Slags and Liquid Silicon at Controlled Oxygen and Nitrogen Potentials

摘要：

In the refining of solar-grade silicon using slag treatment, boron dissolved in the silicon is rejected to a liquid oxide (slag) phase. In this study the partitioning of boron between SiO2-CaO-MgO slags and liquid silicon was examined at 1873 K over a range of slag compositions and gas compositions. It was found that the distribution of boron is dependent on the oxygen and nitrogen partial pressures as well as the slag composition. The highest partition ratios were achieved at 0.4 atm N2 / 0.6 atm CO and below 55 mass ％ SiO2. The concentration of MgO seems to have little impact on the partition ratio.

关键词： silicon refining slag treatment boron oxygen nitrogen

作者: Jesse WHITE Carl ALLERTZ Karl FORWALD Du SICHEN

作者单位: Elkem Technology, 4675 Kristiansand, Norway Department of Materials Science and Engineering, Royal Institute of Technology, 100 44 Stockholm, Sw

会议类型: 国际会议

会议名称: Ninth International Conference on Molten Slags,Fluxes and Salts(第九届国际熔渣、溶剂与熔盐学术会议 MOLTEN12)

会议地点: 北京

会议语种:英文

页码: 1-13

在线出版日期: 2012-05-27（万方平台首次上网日期，不代表论文的发表时间）