阴极电导率和孔隙率对熔盐电解钛精矿脱氧过程的影响

Effect of Electrical Conductivity and Porosity of Cathode on Electro-Deoxidation Process of Ilmenite Concentrate

摘要:

阴极的性能通常是和电解过程与电解效率有着密切的关系。本文中测量了焙烧温度对钛精矿阴极的电导率的影响。结果表明焙烧温度对钛精矿阴极导电性影响很大。钛精矿阴极电阻率随着焙烧温度升高和接触面积的增加而增大。另外本文也研究了阴极孔隙率对熔盐电解制备Ti-Fe合金还原过程的影响。结果表明阴极的孔隙率对还原过程有着直接的影响。孔隙率的增加有利于形成中间化合物CaTiO3，从而改善电流效率。

Abstract:

The performance of the cathode always has a close relationship with the electro-deoxidation process and its current efficiency. In this paper, the effect of sintering temperature on the electrical resistivity of an ilmenite concentrate cathode was measured. The results showed that the sintering temperature had a significant effect on the electrical conductivity of the cathode. The electrical resistivity of ilmenite concentrate cathode decreased with increasing of the sintering temperature and increasing of the contact area. Besides, the influence of the cathode porosity on electrochemical process during preparation of Ti-Fe alloy in molten salt was studied. The results also revealed that the porosity of ilmenite concentrate cathode had a direct effect on the reduction process. The increasing of porosity was beneficial to the formation of intermediate product (CaTiO3) and improvement of the current efficiency.