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目前利用熔盐电解的方法直接使用Ti O2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。本实验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。
At present, the use of molten salt electrolysis method to directly use TiO2 and other oxide raw materials to produce titanium metal or titanium alloy is an important research direction for the production of titanium and its alloys at home and abroad. However, there are relatively few studies on the kinetics of molten salt electrolysis. In this experiment, the traditional unreactive nuclear model was improved. The kinetic process of molten salt electrolysis of titanium concentrate at different reaction temperatures was studied. It was found that the reduction rate of molten salt electrolysis of titanium concentrate was affected by the diffusion of oxygen ions in the product layer The rate control, internal diffusion in the electrolysis reaction is the limiting part of the whole electrolytic reduction process. Increasing the reaction temperature and increasing the porosity are favorable to the internal diffusion process.