A kinetic model for heap leaching of uranium ore considering variation of model parameters with depth of heap
A kinetic model for heap leaching of uranium ore considering variation of model parameters with depth of heap
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DOI：
10.1007/s10967-013-2522-y
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发表时间：
2013-05
影响因子：
1.6
通讯作者：
D. Ding;Jian-bin Song;Y. Ye;Guangyue Li;H. Fu;N. Hu;Yong-dong Wang
中科院分区：
文献类型：
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作者：
D. Ding;Jian-bin Song;Y. Ye;Guangyue Li;H. Fu;N. Hu;Yong-dong Wang
低品位矿石堆浸的动力学模型已有许多种，但模型参数都被当作常数处理。然而，这些模型参数中的一些随着堆的深度而改变。本文设计了一个由六个不同高度的柱体组成的装置，并用于模拟中国南方某铀矿山3 m高铀矿石堆的浸出行为。结果表明，铀矿石堆浸模型参数α和ω随堆深而变化，α和ω与堆深分别呈逻辑斯蒂函数和二次函数关系。在此基础上，建立了考虑堆浸参数随深度变化的堆浸动力学模型。动力学模型的拟合精度大于95%，预测精度大于93%.为低品位铀矿石堆浸动力学模型的建立提供了一种途径。
Many kinetic models for heap leaching of low grade ores have been proposed and the model parameters have been treated as constants. However, some of these model parameters change with the depth of the heap. In the present work an apparatus consisted of six columns with different heights was designed and used to simulate the leaching behavior within a 3-m-high uranium ore heap at a uranium mine in South China. It was found that the model parametersαandωfor heap leaching of the uranium ore varied with the depth of the heap, and that the relationships betweenαand betweenωand the depth of the heap were in the form of the logistic and the quadratic functions, respectively. Furthermore, a kinetic model for heap leaching of the uranium ore considering the variation of the model parameters with the depth of the ore was proposed. The kinetic model gave the fitting precision of more than 95 % and prediction precision of more than 93 %. The present work provided an approach for establishing the kinetic model for heap leaching of low grade uranium ores.