阴极结构对熔盐电脱氧法制备金属钛影响及杂质研究  

Study on the effect of molten salt electro-deoxidation on the preparation of titanium metal

作　　者：辛学松 张强 张姗姗[1] 张敏 Xin Xuesong;Zhang Qiang;Zhang Shanshan;Zhang Min(College of Mechanical Engineering,Shangqiu Institute of Technology,Shangqiu 476000,Henan,China;College of Material and Metallurgy,Guizhou University,Guiyang 550025,Guizhou,China;Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving,Guiyang 550025,Guizhou,China;Tianjin Advanced Equipment Research Institute of Tsinghua University Luoyang Advanced Manufacturing Industry Research and Development Base,Luoyang 471000,Henan,China)

机构地区：[1]商丘工学院机械工程学院,河南商丘476000 [2]贵州大学材料与冶金学院,贵州贵阳550025 [3]贵州省冶金工程与过程节能重点试验室,贵州贵阳550025 [4]清华大学天津高端装备研究院洛阳先进制造产业研发基地,河南洛阳471000

出　　处：《钢铁钒钛》2021年第6期59-65,共7页Iron Steel Vanadium Titanium

基　　金：国家自然科学基金(51764007)资助项目。

摘　　要：在高纯氩气气氛下,在CaCl_(2)熔盐中电解高钛渣制备金属钛,研究了成型压力与阴极片孔隙率的关系以及对电解过程的影响,并采用XRD、SEM等分析手段对阴极片及电解后的物相和微观形貌结构进行表征。结果表明:成型压力对阴极片孔隙率有直接影响,随着成型压力升高,阴极孔隙率下降;阴极片的孔隙率直接影响电脱氧过程,适当的孔隙率有利于形成中间产物CaTiO_(3)和提高电还原速率。4 MPa压制的阴极1050℃烧结2 h,孔隙率为34.79%,电解12 h产物氧含量降低至1.75%,钛含量为95.72%,此时阴极片的电化学性能较好。Titanium metal was prepared by electrolysis of high titanium slag in CaCl_(2) molten salt under a high-purity argon atmosphere.The relationship between forming pressure and porosity of cathode sheet as well as the influence on the electrolysis process were studied.The phases and microstructures of the cathode sheet and that after electrolysis were characterized by XRD and SEM.The results showed that the forming pressure had a direct influence on the porosity of the cathode sheet,which decreased with the increase of the forming pressure.The porosity of the cathode sheet directly affected the electrode deoxidation process,and an appropriate porosity was beneficial to the formation of intermediate product CaTiO_(3) and the increase of the electroreduction rate.The porosity of the cathode pressed by 4 MPa is 34.79%when sintered at 1050℃for 2 h,and the oxygen content of the product is reduced to 1.75%and titanium content is 95.72%when electrolyzed for 12 h,which shows a better electrochemical performance of the cathode sheet.

关 键 词：金属钛 高钛渣 熔盐电脱氧法 成型压力 阴极结构 孔隙率 电化学性能 

分 类 号：TF823[冶金工程—有色金属冶金]