Production of Fe–Ti–Si alloys from the ilmenite ore and their magnetic properties

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• 作者：Saito ; Tetsuji ; Wakabayashi ; Katsuji ; Yamashita ; Satoshi ; Sasabe ; Minoru
• 关键词：Ilmenite ; Fe&ndash ; Ti&ndash ; Si alloy ; Slag materials
• 刊名：Journal of Alloys and Compounds
• 出版年：2005
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：February 22, 2005
• 卷：388
• 期：2
• 页码：258-261
• 文件大小：646 K

摘要

We report a new smelting reduction process for the production of Fe–Ti–Si alloys directly from ilmenite (FeTiO₃) ore by means of the molten silicon equilibrated with the molten slag materials containing CaO, SiO₂, Al₂O₃, and CaF₂. X-ray diffraction and microstructural studies revealed that metallic Fe–Ti–Si alloys were successfully produced from ilmenite ore by the direct reduction process. The resultant Fe–Ti–Si alloys consisted mostly of either the FeTiSi or FeTiSi₂ phase depending on the amount of silicon used. It was found that these silicides exhibit attractively high Curie temperatures (T_c), T_c = 728K for the FeTiSi phase and T_c = 917K for the FeTiSi₂ phase. However, the saturation magnetization of the FeTiSi and FeTiSi₂ phases was found to be relatively small compared to the other iron compounds.