中文摘要：

研究了铀矿石酸化-硫粉细菌通气柱浸体系的pH值、Eh值和铀离子浓度等参数随时间的变化规律,探索了铀矿石的浸出率与硫粉含量的关系。结果表明：在酸化阶段,同一酸化级数下各酸化体系的pH值和铀离子浓度随酸化时间的延长而升高,Eh值随酸化时间的延长而降低;随酸化级数的增加,各酸化体系的pH值、Eh值和铀离子浓度随酸化时间的延长变化量减小。在细菌浸出阶段,同一酸化浸出级数下各浸出体系的pH值、Eh值和铀离子浓度随浸出时间的延长而升高;随浸出级数的增加,各浸出体系的pH值和铀离子浓度的增长率减小,Eh值的增长率增大;硫粉加入量越大,浸出体系pH值降低的幅度越大,Eh值和铀离子浓度升高的幅度也越大。铀矿石的浸出率与硫粉含量呈正相关,硫粉含量为5g/L的浸出体系中,铀的浸出率高达95.45%。

英文摘要：

The variations of pH, Eh and uranium concentration and other parameters with time during the process of uranium ore acidification and bacterial aeration were studied, and was the expl relationship between the uraniu ored. The results show that in m ore leaching the acidification rate and the sulfur stage, the pH and uranium concentration increase while the Eh decreases with the increase of acidification time in the same series of the acidification system. With the increase of acidification series, the change amounts of pH, Eh and uranium concentration in the acidification system decrease with the increase of acidification time. In the bacterial leaching stage, in the same series of the leaching system, the pH, Eh and uranium concentration increase with the leaching time, and the growth rates of the leaching system pH and uranium concentration decrease with the increase of leaching series, while the growth rate of Eh increases. The pH of the leaching system decreases while the Eh and uranium concentration increase with the sulfur amount. The uranium ore leaching rate is positively related to the content of sulfur amount, and the uranium ore leaching rate reaches 95.45% in the leaching system with sulfur at 5 g/L.