低价钛氧化物的电化学还原过程研究  

STUDY ON ELECTROCHEMICAL REDUCTION PROCESS OF LOW-VALENCE TITANIUM OXIDES

作　　者：刘柯佳 崔强 王耀武 Liu Kejia;Cui Qiang;Wang Yaowu(Henan Iron and Steel Group Co.,Ltd;Henan Province Jinye New Materials Technology Co.,Ltd;Anyang Iron and Steel Group Co.,Ltd;Northeastern University)

机构地区：[1]河南钢铁集团有限公司,河南郑州450046 [2]河南省金冶新材料科技有限公司 [3]安阳钢铁集团有限责任公司 [4]东北大学

出　　处：《河南冶金》2025年第1期1-6,34,共7页Henan Metallurgy

基　　金：郑州市青年科技人才(博士)培养专项(2024016)。

摘　　要：基于熔盐电解的原位阴极氧化物电化学还原技术在难熔金属冶炼方面具有独特优势,尤其是金属钛的冶炼。然而在电解还原过程中,原位钛酸钙的生成极大阻碍了二氧化钛阴极的电化学还原。热力学分析表明,以低价的钛氧化物为原料可有效减少原位钛酸钙的生成。因此,对Ti_(2)O_(3)和TiO在CaCl_(2)熔盐中的电化学还原过程进行研究,并就电极电位、比表面积和孔隙率等因素对阴极电化学还原过程和还原效率的影响进行讨论。结果表明:以Ti_(2)O_(3)为阴极进行电化学还原时,可减少但不能避免CaTiO_(3)的形成;而以TiO为阴极进行电化学还原时,可以有效避免CaTiO_(3)的形成。In situ cathodic oxide electrochemical reduction technology based on molten salt electrolysis has unique advantages in refractory metal smelting,especially in titanium smelting.However,in the process of electrolytic reduction,the formation of calcium titanate in situ greatly hinders the electrochemical reduction of titanium dioxide cathode.Thermodynamic analysis shows that the formation of calcium titanate in situ can be effectively reduced by using low-valence titanium oxide as raw material.Based on that,the electrochemical reduction process of Ti_(2)O_(3)and TiO in CaCl_(2)molten salt was studied in this study,and the influence of electrode potential,specific surface area and porosity on the electrochemical reduction process and reduction efficiency of the cathode was discussed.The results show that the formation of CaTiO_(3)can be reduced but not avoided when Ti_(2)O_(3)is used as cathode for electrochemical reduction.When TiO is used as the cathode,CaTiO_(3)can be effectively avoided.

关 键 词：有色金属冶金 熔盐 电化学还原 钛酸钙 低价钛氧化物 

分 类 号：TF823[冶金工程—有色金属冶金]