New Concept for Electrplysis of Rare Metals-application of hydrogen gas oxidation as anodic reaction=

以H_2气体氧化为阳极反应，研究了稀有金属的电解。选择Ti作为靶材是因为其更广阔的市场。还尝试了另外两种方法，即从氟化物-氯化物熔体中电积钛和高温直接电解钛锭。结果总结如下：（1）在LiF-NaF-KF熔体中用K_2TIF_6电积Ti金属。 Ti离子的部分电化学还原是不必要的，因此与氯化物熔体相比，该过程得到简化。 H_2气体在碳气体电极上的电化学氧化可用作该过程的阳极反应。电解进行稳定，槽电压保持在2V左右的很低水平。然而，沉积的Ti的形貌通常是粉末状的。用水冲洗盐并不容易。(2)用K_2TIF_6在NaCl-KCI-NaF-KF熔体中电沉积Ti金属。在合适的条件下可以将阳极电位控制在较低值，进行稳定的电解。 Ti 离子的部分电化学还原是没有必要的。并且不再使用气体电极。因此，通过使用H_2气体氧化作为阳极反应，不仅与氯化物熔体中的过程相比，而且与氟化物熔体中的过程相比，该过程可以得到简化。 NaCl-KCl-NaF-KF盐比LiF-NaF-KF盐更容易用水从Ti沉积物中去除。(3)在电渣重熔装置中通过含有TiO_2的CaF_2-CaO混合物施加高直流电流。混合物通过焦耳热熔化。在电池底部的阴极处获得Ti金属。结论是，该过程原则上是有前途的，并且必须提供足够的热量来实现该过程。

Electrolysis of rare metal has been studied by using H_2 gas oxidation as anodic reaction. Ti was chosen as a target material because of its wider market. Two other methods were also tried, namely electrowinning of Ti from a fluoride-chloride melt and direct electrolysis of a Ti ingot at high temperature.The results are summaized as follows ;(1) Ti metal was electrowon in a LiF-NaF-KF melt with K_2TIF_6. Partial electrochemical reduction of Ti ions was not necessary so that the process was simplified in comparison to that in a chloride melt. The electrochemical oxidation of H_2 gas at a carbon gas electrode could be used as an anodic reaction for the process. Stable electrolysis was performed, and the cell voltage kept very low as about 2V.However, the morphology of the deposited Ti was usually powdery. Rinsing of the salt with water was not easy.(2) Ti metal was electrowon in a NaCl-KCI-NaF-KF melt with K_2TIF_6. The anode potential could be controlled to lower value under the suitable condition, and stable electrolysis was conducted. Partial electrochemical reduction of Ti ions was not necessary. and a gas electrode was disused. Therefore, the process could be simplified in comparison to not only that in a chloride melt and also that in a fluoride melt by using H_2 gas oxidation as anodic reaction. The NaCl-KCl-NaF-KF salt was removed from the Ti deposit with water more easily than the LiF-NaF-KF salt.(3) High DC-current was applied through a CaF_2-CaO mixture containing TiO_2 in an electro-slag remelting apparatus. The mixture was melted by Joule heat. and Ti metal was obtained at the cathode on the bottom of the cell. It is concluded that this process is promising in principal, and that a sufficient heat must be supplied to actualize the process.