Experimental study on radon exhalation behavior of heap leaching uranium ore column with dilute sulfuric acid
Experimental study on radon exhalation behavior of heap leaching uranium ore column with dilute sulfuric acid
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稀硫酸堆浸铀矿柱氡析出行为实验研究
DOI：
10.1007/s11356-019-05349-x
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发表时间：
2019-05
影响因子：
5.8
通讯作者：
Zhong Yongming
中科院分区：
文献类型：
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作者：
Ye Yongjun;Wang Zhongkun;Liang Tao;Ding Dexin;Feng Shengyang;Zhong Yongming
为了研究稀硫酸堆浸铀矿石时氡的释放行为，以南方某铀矿山的未浸出铀矿石为试验样品。采用铀矿山常用的浸出工艺参数，在一维酸浸试验柱上进行了为期21天的室内试验。用静态累积法测定了铀矿石柱在喷洒去离子水和稀硫酸时的表面氡析出率。还测量了实验所有21天的铀浸出率和矿柱高度。结果表明：（1）淋溶剂作用下，铀矿柱表面氡析出率在初期随时间急剧增加;在达到最大值之后，速率逐渐降低并稳定。停止喷淋后，铀矿柱表面氡析出率先下降，然后上升，直至趋于稳定。(2)在整个21天的浸出实验中，铀的累积浸出率随着时间的推移而逐渐增加。另一方面，铀矿柱的表面氡析出率有波动，但铀矿石中铀的浸出对氡析出率几乎没有影响。(3)淋滤过程中地表氡析出率与矿柱残留高度之间不存在线性相关关系，但矿柱坍塌事件是地表氡析出率波动的直接诱发因素。
In order to study the radon release behavior when heap leaching uranium ores with dilute sulfuric acid, unleached uranium ores from a uranium mine in southern China were selected as test samples. Adopting parameters from leaching processes commonly used in uranium mines, a laboratory experiment was carried out for 21 days with a one-dimensional acid heap leaching experimental column. The surface radon exhalation rate of uranium ore column was determined by static accumulation method while spraying with deionized water and dilute sulfuric acid. The uranium leaching rate and ore column height for all 21 days of the experiment were also measured. The results show that (1) when sprayed with a leaching agent, the surface radon exhalation rate of uranium ore column initially increased with time sharply. After a maximum value was reached, the rate gradually decreased and stabilized. When the spraying stopped, the surface radon exhalation rate of uranium ore column initially decreased, before increasing until it tended to stabilize. (2) During the entirety of the 21-day leaching experiment, the cumulative leaching rate of uranium increased gradually with time. On the other hand, the surface radon exhalation rate of uranium ore column fluctuated, but the leaching of uranium from uranium ores had almost no effect on the radon exhalation rate. (3) There was no linear correlation between the surface radon exhalation rate and the residual height of ore column during leaching, but the collapsing event of ore column was the direct inducing factor of the fluctuation of surface radon exhalation rate.
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影响因子：
1.6
作者：
D. Ding;Jian-bin Song;Y. Ye;Guangyue Li;H. Fu;N. Hu;Yong-dong Wang
通讯作者：
D. Ding;Jian-bin Song;Y. Ye;Guangyue Li;H. Fu;N. Hu;Yong-dong Wang
影响因子：
4.7
作者：
E. Hoummady;F. Golfier;M. Cathelineau;L. Truche;N. Durupt;Jean-Jacques Blanvillain;J. Neto;E. Lefèvr
通讯作者：
E. Hoummady;F. Golfier;M. Cathelineau;L. Truche;N. Durupt;Jean-Jacques Blanvillain;J. Neto;E. Lefèvr
DOI：
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发表时间：
2002-06
期刊：
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影响因子：
--
作者：
岩崎 民子
通讯作者：
岩崎 民子
影响因子：
2.2
作者：
K. Strong;D. Levins
通讯作者：
K. Strong;D. Levins
影响因子：
--
作者：
D. Ting
通讯作者：
D. Ting