Chloride Pyrometallurgy of Uranium Ore, (II) Selective Extraction of Uranium Using the Mixed Gas of Chlorine and Oxygen in the Presence of Activated Carbon
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Selective extraction of uranium from a phosphate are was studied by using the mixed gas of Cl<SUB>2</SUB> and O<SUB>2</SUB>. On heating the ore and carbon mixture in Cl<SUB>2</SUB>, the volatilized chloride of uranium is accompanied by iron, aluminum, phosphorus and silicon chlorides. The addition of O<SUB>2</SUB> 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, 223K (Cl<SUB>2</SUB>:100ml/min, O<SUB>2</SUB>+N<SUB>2</SUB>: 400ml/min). The volatilization ratio of uranium was almost unchanged at 90% up to 50ml/min O<SUB>2</SUB> (carbon amount: 15wt%). The effect of the other parameters, i.e. Cl<SUB>2</SUB> flow rate, carbon amount, reaction temperature and time was examined.
- Journal of Nuclear Science and Technology
Journal of Nuclear Science and Technology 33(4), p.327-332, 1996-04-25
Atomic Energy Society of Japan