松辽盆地砂岩型铀矿地浸采冶与生态保护——以钱家店铀矿为例

In-situ leaching for sandstone type uranium deposit in Songliao basin and ecological conservation

核电的快速发展带动了铀资源需求的增加,地浸采冶技术极大地推进了我国砂岩型铀矿的开采。本文以松辽盆地正在开采的钱家店铀矿床为实例,对砂岩型铀矿的地浸采冶技术特征进行了总结,对开采给环境带来的影响进行了评价。钱家店的中性地浸采冶技术,采用CO_2+H_2O作为浸出剂,解决了高碳酸盐含量铀矿石的采冶,更为重要的是该类浸出剂不会对地下水造成污染,开采过程十分环保,是值得在我国北方推广的一种采冶技术手段。

With the rapid developing of nuclear power industry, the demand for uranium resources is increasing year by year. In- situ leaching has greatly enhanced exploitation of sandstone- type uranium deposit in China. In this paper, characteristics of In-situ leaching for sandstone-type uranium deposit are summarized with an example of being exploited uranium deposits in Songliao basin, which is named Qianjiadian uranium deposit. Meanwhile,affect for the environment by the process of exploitation is evaluated. The result shows that In- situ leaching of Qianjiadian uranium deposit has characteristics of low input and high efficiency. Furthermore, the most important is that leaching liquid which mainly consist of CO_2＋ H_2 O makes extremely low pollution on underwater. The whole process of exploiting in Qianjiadian uranium deposit is consistent with ecological conservation. Therefore,In-situ leaching for sandstone type uranium deposit is worth promoting.