Direct Electro-deoxidation of Ilmenite Concentrate to Prepare FeTi Alloy in CaCl2 Molten Salt

被引：12
|
作者：
Liu, Xuyang [1 ]
Hu, Meilong [1 ]
Bai, Chenguang [1 ]
Lv, Xuewei [1 ]
机构：
[1] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China
来源：
HIGH TEMPERATURE MATERIALS AND PROCESSES | 2014年 / 33卷 / 04期
关键词：
ilmenite concentrate; impedance spectrum; cycle voltammetry; Fe-Ti alloy; CALCIUM-CHLORIDE; ELECTROCHEMICAL PREPARATION; TITANIUM-DIOXIDE; TIFE ALLOY; OXIDE; DEOXIDIZATION; REDUCTION; MECHANISM;
D O I：
10.1515/htmp-2013-0084
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In order to prepare FeTi alloy using ilmenite concentrate in molten salt by electrolytic method, the electrochemical deoxidation process was studied by cyclic voltammetry and AC impedance spectroscopy. The electrolytic experiments at different time verified the electrochemical behavior. It is shown that the electro-deoxidation process for ilmenite concentrate mainly consists of two steps. Fe is reduced firstly from the ilmenite concentrate. The second step is the reduction of titanium dioxide with an intermediate product perovskite. At low voltage, the speed of electro-deoxidation process is mainly dependent on the electrochemical reaction. As the potential increases, the diffusion of ion becomes the main rate-controlling step for the electro-deoxidation of ilmenite concentrate.
引用
收藏
页码：377 / 383
页数：7
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