| 摘要 |
<p>A process for producing UO2 powder, comprising the steps of comminuting a uranium-containing metal alloy to produce a uranium-containing metal alloy powder, oxidizing the uranium-containing alloy powder at elevated temperature to produce oxidized metal alloy containing U3O8 and metal impurities, dissolving the oxidized metal alloy containing U3O8 and metal impurities in nitric acid, filtering to produce a uranyl nitrate solution, subjecting the uranyl nitrate solution to solvent extraction to remove remaining metal impurities to produce a purified uranyl nitrate solution, precipitating ammonium diiuranate from said uranyl nitrate solution, and heating said ammonium diiuranate precipitate to produce UO2 powder.</p> |
