ABSTRACT A route of vacuum carbothermal reduction of Panzhihua ilmenite was introduced to prepare Ti-rich material. The effects of mass ratio of graphite to ilmenite, reduction temperature and vacuum condition on compositions of products and contents of impurities were investigated. Scanning electron microscope images showed that Mg mainly existed in MgSiO3, MgAl2O4 and MgnTi3−nO5 in ilmenite. Thermodynamic analyses showed that only after TiO2 was completely reduced to Ti2O3, the impurities Mg and Ca could be removed from the products in gaseous state. A Ti-rich material containing 0.39 wt-% Ca and 0.038 wt-% Mg was obtained when Panzhihua ilmenite was reduced with a graphite/ilmenite mass ratio of 0.130:1 at 1773 K for 1 h under the vacuum degree of 10 Pa. X-ray diffraction patterns showed that the final product was mainly composed of Ti2O3 and α-Fe.

中文翻译：

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钛铁矿真空碳热还原法制备富钛材料工艺

摘要 介绍了攀枝花钛铁矿真空碳热还原制备富钛材料的方法。考察了石墨与钛铁矿的质量比、还原温度和真空条件对产物组成和杂质含量的影响。扫描电子显微镜图像表明，镁主要存在于钛铁矿中的 MgSiO3、MgAl2O4 和 MgnTi3−nO5 中。热力学分析表明，只有在 TiO2 完全还原为 Ti2O3 后，才能从气态产物中除去杂质 Mg 和 Ca。攀枝花钛铁矿以石墨/钛铁矿质量比为0.130:1在1773 K、10 Pa真空度下还原1 h，得到含0.39 wt-% Ca和0.038 wt-% Mg的富Ti材料。