溶融塩化カルシウム浴を用いた酸化バナジウムの直接還元

摘要

バナジウム（V）は，常温，常圧で約2.2massl%の水素吸rn蔵および，放出特性を持っていることから，単体金属で水素rn吸蔵材として期待され,また放射化しない特性より原子炉のrn材料としても使用されている金属である．%A new process is proposed to reduce V_2O_5 by using calcium in molten CaCl_2 for vanadium production. It consists of the calcium reduction in molten CaCl_2 and the electrochemical reaction for the recovery of Ca from CaO in the same bath. V_2O_5 pellet was placed on cathode in order to react with Ca electrochemically generated near the cathode. V_2O_5 exists as liquid at the experimental temperature (1123 K), because of the melting point of 963 K for V_2O_5. At the initial stage of the reduction, liquid sample is reduced to solid CaV_2O_4. As the supplied quantity of electricity increased, the oxygen concentration in the vanadium samples decreased exponentially. Vanadium containing only 1800 ppm oxygen was obtained after the electrolysis for 34.4 ks.