| Kroll is the main industrial production methods of titanium, the cost is very high due to its complicated process. Therefore, it is urgent to find a method which has simple process, low cost and environmental friendly.In this paper, CaF2-LiF and LiF-KF are used as the electrolyte, and we use three-electrode system to study the reduction process of Ti4+ in K2TiF6/TiO2, and also the electrolysis conditions of producing titanium. It includes the followings:(1) Study the electrochemical reduction process and mechanism of Ti(â…£) in CaF2-LiF. It includes three steps:Ti(â…£)/Ti(â…¢), Ti(â…¢)/Ti(â…¡), Ti(â…¡)/Ti(O), when the content of K2TiF6 is high, it also includes the step of Ti3++3eâ†'Ti(O).(2) According to the result of constant-potential electrolysis:It is difficult to obtain titanium through electrolysis on Fe electrode for several hours although Ti(â…£) can reduced to Ti(O) in this electrolyte. Since the reduction product of titanium reacts with titanium ions in the electrolyte. We can detect Ti element after electrolysis on V/Zr electrode.(3) Through the electrochemical process of CaF2-LiF-TiO2, there exists three obvious reduction peaks, it means that TiO2 is soluble in this electrolyte, but we can not obtain titanium through electrolysis on Fe electrode for several hours. And we can detect Ti element after electrolysis on V/Zr electrode.(4) Study the reduction process of Ti4+ in LiF-KF-TiO2 through electrochemical study. There exists one obvious reduction peak, it means we can get titanium through one-step reduction. we can obtain Pt-Ti alloy through constant-potential electrolysis on Pt electrode, which means Ti4+ can be reduced to Ti in this electrolyte. |
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