| 陈海辉,曾莹莹.铀矿堆浸过程的动力学模型及实验研究[J].井冈山大学自然版,2013,(2):40-43 |
| 铀矿堆浸过程的动力学模型及实验研究 |
| DYNAMIC MODEL AND EXPERIMENT STUDY OF URANIUM MINE HEAP LEACHING PROCESS |
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| DOI： |
| 中文关键词: 堆浸 铀矿 化学反应速率常数 动力学模型 |
| 英文关键词: heap leaching uranium chemical reaction leaching rate constant dynamic model |
| 基金项目:江西省科技厅科技计划项目（20111BBG70007-1）;江西省教育厅科技计划项目（GJJ12481） |
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| 中文摘要: |
| 通过浸出率与浸出时间的关系曲线，推导出铀矿硫酸堆浸过程的控制模式和化学反应常数。实验结果表明浸出率在小于60％以内，与浸出时间呈直线关系，得出浸出过程控制模式为化学反应控制的结论。实验数据计算得出在该实验中化学反应浸出速率常数为1．5×10^-7s^-1，液固相化学反应速率系数为3．6×10^-8m／s。实验结果在未加氧化剂的酸堆浸铀矿石中，最多只有40％的四价铀能氧化成六价铀，要想进一步提高铀的浸出率，必须加入氧化剂，提高氧化能力。 |
| 英文摘要: |
| The process model and chemical reaction constants of uranium mine sulfuric acid heap leaching are deduced by the relationship curve between the leaching rate and leaching time. The results show when the leaching rate less than 60%, it is linear with the leaching time, and the leaching process model is controlled by chemical reaction process. The chemical reaction leaching rate constant is 1.5 × 10-7 S^1, the liquid-solid phase chemical reaction coefficient is 3.6×108 m/s in this experimental data. It also shows that if oxidants were not added into the heap-leaching uranium ore, only 40% of the quadrivalent uranium could be oxidized into hexavalent uranium, so the oxidants must be added to improve the oxidizing ability for greater leaching rate of uranium. |
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