Deoxidation of Titanium Using Cerium Metal and Its Oxyhalide Formation
Deoxidation of Titanium Using Cerium Metal and Its Oxyhalide Formation
复制标题
金属铈脱氧钛及其卤氧化物的形成
DOI：
10.1007/978-3-030-92563-5_10
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Okabe Toru H.
中科院分区：
文献类型：
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作者：
Kamimura Gen;Ouchi Takanari;Okabe Toru H.
废钛的回收利用需要从废钛中直接除去氧。虽然已经开发了几种用于Ti的脱氧技术，但是Ti和O之间的强亲和力限制了它们的成本效益。在这项研究中，我们开发了一种新的脱氧工艺，钛使用铈（Ce）金属，这是最丰富和成本效益的稀土元素。热力学分析表明，通过在含有Ce离子的卤化物熔剂中形成Ce卤氧化物的脱氧使得能够以极低的O浓度生产Ti。我们实验证明，CeOCl与Ce金属的生成反应可以将Ti金属还原并产生具有100质量ppm O或更低的高纯Ti，其低于通过Kroll工艺产生的原始Ti的O浓度。这种用Ce金属脱氧的方法能够回收被O污染的Ti废料。
The recyclingof titanium (Ti) scraps requires the direct removal of oxygen (O) from the Ti scraps. Although several deoxidation techniques for Ti have been developed, the strong affinity between Ti and O limits their cost-effectiveness. In this study, we develop a new deoxidation process for Ti using cerium (Ce) metal, which is the most abundant and cost-effective rare earth element. Thermodynamic analysis suggests that the deoxidation through the formation of Ce oxyhalides in halide fluxes containing Ce ions enables the production of Ti with extremely low O concentrations. We experimentally demonstrate that the formation reaction of CeOCl with Ce metal can deoxidize Ti metal and produce highly pure Ti with 100 mass ppm O or below, which is lower than the O concentration of the virgin Ti produced by the Kroll process. This deoxidation process with Ce metal enables the recycling of Ti scraps contaminated with O.