首页|TiO2直接还原制备超低氧钛

TiO2直接还原制备超低氧钛

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提出在MgCl2-KCl-YCl3熔盐中,通过熔盐电解产生Mg直接还原TiO2制备低氧钛.绘制Mg-Ti-O 三元相图和电位-氧势(ψ-pO2-)图,表明镁还原TiO2制备低氧钛是可行的.在MgCl2-YCl3和MgCl2-YCl3-KCl熔盐中,不同温度和施加电压条件下,开展熔盐电解-镁热还原TiO2实验研究,结果表明:借助YOCl沉淀及COx同步生成,将还原和脱氧产物O2-快速脱除,在1073～1173 K、施加电压2.5～3.1 V的条件下,通过电化学还原可以将TiO2还原为高氧钛(Ti6O).在温度为1173 K的MgCl2-YCl3熔盐中,开展不同施加电压下的高氧钛电化学脱氧实验.此外,还观察到有可能将高氧钛的氧含量可从1200×10-6降至100×10-6以下.
Preparation of ultralow-oxygen titanium by direct reduction of TiO2
A new method for the preparation of low oxygen titanium was proposed by the direct reduction of TiO2 with Mg produced by MgCl2-KCl-YCl3 molten salt electrolysis.The Mg-Ti-O phase diagram indicates that it is feasible to reduce TiO2 using Mg,and the ψ-pO2-diagrams indicate that deep deoxidation of titanium in molten MgCl2-YCl3 is also feasible.The experimental study on the reduction of TiO2 was carried out in MgCl2-YCl3 and MgCl2-YCl3-KCl molten salts.The results showed that the O2-from the reduction and deoxygenation was removed using YOC1 precipitation and COx gas production and TiO2 can be reduced to titanium peroxide(Ti6O)by electrochemical reduction at 1073-1173 K and 2.5-3.1 V.The high-oxygen titanium was electrochemically deoxidized in the molten salt of MgCl2-YCl3 at a temperature of 1173 K at different voltages.Moreover,it was observed that it is possible to reduce the high oxygen content of titanium from 1200×10-6 to less than 100×10-6 oxygen.

titanium dioxideelectrochemistrymagnesium reductiondeoxidationultralow-oxygen Tirare earth metals

庞俭、孔令鑫、朱立国、徐宝强、徐俊杰、白崇霖、杨斌

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昆明理工大学云南省有色金属真空冶金重点实验室,昆明 650093

昆明理工大学 真空冶金国家工程研究中心,昆明 650093

昆明理工大学冶金与能源工程学院,昆明 650093

昆明理工大学省部共建复杂有色金属资源清洁利用国家重点实验室,昆明 650093

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二氧化钛 电化学 镁热还原 脱氧 超低氧钛 稀土金属

National Natural Science Foundation of ChinaFundamental Research Project of Yunnan Province,ChinaKunming University of Technology Highlevel Talent Platform Construction Project of Science and Technology,China

21968013202201AT070229KKKP201752023

2024

10.1016/S1003-6326(23)66427-1

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCD
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2024.34(2)