Selective extraction of uranium from a phosphate ore was studied by using the mixed gas of Cl2 and O2. On heating the ore and carbon mixture in Cl2, the volatilized chloride of uranium is accompanied by iron, aluminum, phosphorus and silicon chlorides. The addition of O2 gas effectively lowered the volatilization ratios of aluminum, phosphorus and silicon. The ratio decreased with increasing oxygen flow rate up to 50ml/min at 1,223 K (Cl2: 100ml/min, O2+N2: 400m//min). The volatilization ratio of uranium was almost unchanged at 90% up to 50 ml/min O2 (carbon amount: 15wt%). The effect of the other parameters, i.e. Cl2 flow rate, carbon amount, reaction temperature and time was examined.
- Phosphate rocks
- Uranium chlorides
- Uranium ores
- Volatilization separation
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Nuclear Energy and Engineering