Electrochemical Reduction Behavior of Soluble CaTiO3 in Na3AlF6-AlF3 Melt for the Preparation of Metal Titanium
Electrochemical Reduction Behavior of Soluble CaTiO3 in Na3AlF6-AlF3 Melt for the Preparation of Metal Titanium
复制标题
可溶性CaTiO3在Na3AlF6-AlF3熔体中制备金属钛的电化学还原行为
DOI：
10.1149/2.0611709jes
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发表时间：
2017-01-01
影响因子：
3.9
通讯作者：
Guo, Zhancheng
中科院分区：
文献类型：
--
作者：
Weng, Wei;Wang, Mingyong;Guo, Zhancheng
证实了溶态CaTiO3在Na3AlF6-AlF3熔体中直接电解制备金属钛，为含钛高炉渣CaTiO3精矿的高价值利用提供了一条捷径。采用等温饱和法测定了1253 K时CaTiO3在Na3AlF6-AlF3熔体中的溶解度，并采用循环伏安法、方波伏安法、开路电位法和恒电位法研究了tio32的电化学还原行为。结果表明，在1253 K时，CaTiO3在熔体中的溶解度为2.4%。通过TiO32—> TiO—> Ti2O—> Ti的连续三步还原反应，将TiO32离子还原为金属钛。1253 K时，tio32在Na3AlF6-AlF3熔体中的扩散系数为6.7 × 10-(6) cm(2)s-(1)。在1823 K的蒸发条件下，将沉积的金属钛与Na3AlF6成功分离。(C) 2017电化学学会。版权所有。
Direct preparation of metal titanium from soluble CaTiO3 in the Na3AlF6-AlF3 melt by electrolysis was confirmed, providing a short route for the high value utilization of CaTiO3 concentrates obtained from the titanium bearing blast furnace slag. The solubility of CaTiO3 in the Na3AlF6-AlF3 melt at 1253 K was determined by the isothermal saturation method and the electrochemical reduction behavior of TiO32-was investigated by cyclic voltammogram, square wave voltammogram, open circuit potential and potentiostatic electrolysis. The results indicated that the solubility of CaTiO3 in the melt was 2.4% at 1253 K. The TiO32-ions were reduced to metal titanium by the consecutive three-step reduction reactions: TiO32--> TiO -> Ti2O -> Ti. The diffusion coefficient of TiO32-in the Na3AlF6-AlF3 melt was 6.7 x 10-(6) cm(2)s-(1) at 1253 K. The deposited metal titanium was successfully separated with Na3AlF6 by evaporation at 1823 K. (C) 2017 The Electrochemical Society. All rights reserved.