钛精矿熔盐电解动力学研究

Kinetics of Ilmenite concentrate electrolysis process in molten salt

摘要:

目前利用熔盐电解的方法直接使用TiO2等氧化物原料来生产金属钛或者钛合金，是国内外对钛及其合金生产的重要研究方向，然而关于熔盐电解动力学的研究相对较少。本文对传统的未反应核模型进行改进，研究了不同反应温度下钛精矿熔盐电解的动力学过程，发现钛精矿熔盐电解过程的还原速率，受到氧离子在产物层中的扩散速率控制，电解反应中的内扩散为整个电解还原过程的限制性环节。提高反应温度，增加孔隙率有利于内扩散过程。

Abstract:

Now using titanium-bearing material to product titanium and titanium alloy based on Fusedsaltelectrolysis method has become an important research direction at home and abroad. But less research has been done on the kinetics of Fusedsaltelectrolysis process. Electrolysis kinetics for different temperature was studied using an improved model, internal diffusion was considered as the restrictive link of electrolysis process of Ilmenite concentrate in molten salt. High reaction temperature and big porosity of cathode can be used to improve the internal diffusion speed, however, at this case, side reaction will increase, which affects the electrolysis speed at the same time.