某酸法地浸矿山终采区铀资源强化浸出试验研究  

Study of enhanced leaching technology for uranium resources in the decommissioned mining area of an acid in-situ leaching mine

作　　者：许影[1] 成弘[1] 张万亮 赵利信 邓锦勋[1] 张翀[1] XU Ying;CHENG Hong;ZHANG Wanliang;ZHAO Lixin;DENG Jinxun;ZHANG Chong(Beijing Research Institute of Chemical Engineering Metallurgy,Beijing 101149,China;Tongliao Uranium Co.,Ltd.,CNNC,Tongliao 028000,China)

机构地区：[1]核工业北京化工冶金研究院,北京101149 [2]中核通辽铀业有限责任公司,内蒙古通辽028000

出　　处：《中国矿业》2022年第7期147-155,共9页China Mining Magazine

摘　　要：新疆某铀矿床运行20多年后,终采区面临浸出铀浓度低、资源回收率低、运行成本高等问题。为进一步提高铀资源回收率,以该矿床目标终采区为研究对象,开展剩余铀资源强化浸出试验研究。首先在该采区选择靶区位置补打6个试验孔,通过钻孔测井、矿石组分及矿物分析得知,剩余铀资源多赋存于底板泥岩及紧靠底板附近的泥质粉砂岩中;同时,矿石中可见还原性矿物及不同成因的堵塞物。因此,提高采区剩余铀资源回收率需采取强化浸出技术措施。研究从强化配位反应及提高氧化强度入手,开展了化学强化浸出试验,筛选出可实现强化浸出试验条件;在目标采区开展强化浸出扩大试验,6个试验单元共浸出铀10.8 t。结果表明,虽该采区经过多年开采,残余铀资源品位较低,但是经过化学强化浸出,仍可以实现残余铀资源的浸出。试验提出的强化浸出方案在技术上可行,具有推广应用价值。After more than 20 years’ operation of a uranium deposit in Xinjiang, the final mining areas are facing with the problems of low leached uranium concentration, low recovery rate of resource and high operation cost.In order to reduce the decommissioning burden and improve the recovery rate of uranium resources, the study on enhanced leaching test of residual resource is carried out, which taking the goal mining area to be decommissioned as the research object.Firstly, six additional test holes are drilled in the selected target area of the mining area.Through borehole logging, ore composition and mineral analysis, it is found that the remaining uranium resources mostly occurred in mudstone of floor and argillaceous siltstone close to floor.At the same time, reductive minerals and plugging materials of different origin can be found in the ore.Therefore, to improve the recovery rate of the remaining resources in mining area, it is necessary to take measures of enhanced leaching technology.The chemical way of enhanced leaching test which is starting from strengthening coordination reaction and improving oxidation intensity, is carried out.The optimum conditions for the enhanced leaching test are selected.Then, the enhanced leaching test is carried out in the target mining area, and 10.8 t uranium is leached by 6 test units.The results show that although the residual uranium resources in this mining area are in low grade after many years of mining, the residual uranium resources can still be leached by chemical strengthening leaching ways.The research is technically feasible and has the value of popularization and application.

关 键 词：地浸采铀 终采区 回收率 残余铀资源 强化浸出 

分 类 号：TD868[矿业工程—金属矿开采]