| 摘要 |
OF DISCLOSURE A process for extracting uranium values from a pyrite concentrate containing at least 20% by weight sulphur and at least 50 grams per ton of uranium, calculated at U308, including the steps of roasting the concentrate at a temperature in the range 650 to 750.degree.C to convert the uranium to uranium sulphate, and solubilising the uranium sulphate in the roasted concentrate by means of a sulphuric acid leach of pH not exceeding 3. |
