Distribution of Calcium and Aluminum Between Molten Silicon and Silica-Rich CaO-Al₂O₃-SiO₂ Slags at 1823 K (1550 °C)

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• 作者：Seung Hwan Ahn ; Lars Klemet Jakobsson…
• 刊名：Metallurgical and Materials Transactions B
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：48
• 期：1
• 页码：308-316
• 全文大小：1012KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Metallic Materials; Characterization and Evaluation of Materials; Structural Materials; Surfaces and Interfaces, Thin Films; Nanotechnology;
• 出版者：Springer US
• ISSN：1543-1916
• 卷排序：48

文摘

Oxidative refining of silicon after tapping from the furnace is performed to remove calcium and aluminum impurities. Depending on the slag composition, the refining limit is determined by the thermodynamic equilibrium between silicon and slag. Silica-rich CaO-Al₂O₃-SiO₂ slags were equilibrated with silicon at 1823 K (1550 °C) in the present study. The results were compared with previous experimental measurements, experimentally measured activities in the slag and thermodynamically modeled data. The present study was found to agree relatively well with most of these works. The concentrations of calcium and aluminum in silicon along the liquidus line for SiO₂ saturation were also investigated, and this area was found to have less agreement between different works.