抄録
Minor metals such as tungsten (W), molybdenum (Mo) and rhenium (Re) are necessary for high performance products, and a steady supply of them is very important. These metals are used for the X-ray target of the X-ray computed tomography equipment. In this study, we studied a dry separation method of W from discarded targets using the difference of volatilization behavior of the metal oxides. We obtained a 96% separation rate of W from the target by grinding, oxidation (1073 K, 5 h) and volatilization (1223 K, 5 h).
