| 摘要 |
<p>A post-treatment process (82) for the further removal of radionuclides from upgraded copper concentrate to produce a low emission copper concentrate, the upgraded copper concentrate resulting from treatment of a radioactive copper concentrate by means of one or more of the processes of reductive leaching, metathesis leaching, acidic dissolution of gangue minerals, or an acidic, chloridic, electrochemically controlled leach (NONOX leach), the post- treatment process comprising the steps of: i) forming a slurry of the upgraded copper concentrate and adjusting the temperature of the slurry; ii) thickening, filtering and repulping of the temperature adjusted slurry to form a treated slurry; and iii) treatment of the treated slurry to produce the low emission copper concentrate, the treatment step being carried out by one or both of the steps of alkaline washing or controlled leaching, the controlled leaching being an acidic, chloridic, electrochemically controlled leaching. A further pre-treatment process is also described.</p> |
