| 基于Miedema模型的海绵钛铁杂质来源研究 |
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| 引用本文： | 盛卓,李开华,苗庆东,李亮.基于Miedema模型的海绵钛铁杂质来源研究[J].有色金属(冶炼部分),2019(6):24-29. |
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| 作者姓名： | 盛卓 李开华 苗庆东 李亮 |
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| 作者单位： | 钒钛资源综合利用国家重点实验室 |
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| 基金项目： | 四川省转移支付项目（2017GZYZF0039） |
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| 摘 要： | 基于二元Miedema模型和Troop三元拓展模型分别对Mg-Ti、Mg-Fe、Ti-Fe二元系及Mg-Ti-Fe三元系进行了混合焓、吉布斯自由能计算。计算结果表明,在Mg-Ti-Fe三元系中,低镁含量区域具有负值的混合焓和吉布斯自由能,即钛、铁具有较强的结合力。在镁热法海绵钛生产中,钢制反应容器为海绵钛铁杂质的主要来源,当反应容器的铁溶解进入液镁后,铁将优先与钛形成金属间化合物,并最终使其富集于靠近反应容器壁处。
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| 关 键 词： | 铁杂质 海绵钛 Miedema模型 混合焓 |
| 收稿时间： | 2019/1/27 0:00:00 |
| 修稿时间： | 2019/1/29 0:00:00 |
Inflow Method Study of Fe Impurity in Titanium Sponge Based on Miedema Model |
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| shengzhuo,likaihu,MIAO Qing-dong and Liliang.Inflow Method Study of Fe Impurity in Titanium Sponge Based on Miedema Model[J].Nonferrous Metals(Extractive Metallurgy),2019(6):24-29. |
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| Authors: | shengzhuo likaihu MIAO Qing-dong and Liliang |
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| Affiliation: | State Key laboratory of Vanadium and Titanium Resources Comprehensive Utilization |
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| Abstract: | Mixing enthalpy and Gibbs free energy of Mg-Ti, Mg-Fe, Ti-Fe binary systems, and Mg-Ti-Fe ternary system were calculated based on Miedema Model and Troop Extension Model. The results show that, for Mg-Ti-Fe ternary system, in low Mg content zone, calculation values of mixing enthalpy and Gibbs free energy are negative, which demonstrates that Fe atom and Ti atom have stronger chemical driving force by comparison with Mg atom. During reduction stage of titanium sponge production, Fe impurity inflows mainly come from stainless reactor. Upon dissolving in liquid magnesium, Fe atom will form intermetallic compound with titanium atom at reaction zone priority, and enrich near reactor wall. |
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| Keywords: | Fe impurity titanium sponge Miedema Model mixing enthalpy |
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