微波预处理对细菌浸出低品位铀的影响  

Effect of Microwave Pretreatment on Bacterial Leaching of Low Grade Uranium

作　　者：葛玉波 周仲魁[1,2] 孙占学[1,2] 郑立莉 饶苗苗 徐玲玲[1,2] 高旭[1,2] GE Yu-bo;ZHOU Zhong-kui;SUN Zhan-xue;ZHENG Li-li;RAO Miao-miao;XU Ling-ling;GAO Xu(State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China;School of Water Resources and Environmental Engineering,East China University of Technology,Nanchang 330013,China)

机构地区：[1]东华理工大学核资源与环境国家重点实验室,南昌330013 [2]东华理工大学水资源与环境工程学院,南昌330013

出　　处：《有色金属（冶炼部分）》2019年第11期26-31,共6页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目（41662024）;江西省自然科学基金资助项目（20142BAB213021）;江西省教育厅科技计划项目（GJJ13439）;江西研究生创新基金资助项目（YC2018-S343）

摘　　要：针对难处理铀尾矿因脉石结构多而导致铀浸出率低的问题,提出微波预处理破坏脉石结构提高铀浸出率的思路。采用单因素法考察微波预处理时间对铀浸出率的影响。结果表明:微波预处理20min时,浸出铀浓度为72.75mg/L,铀浸出率为82.92%,较原样提高16.51个百分点。过度延长微波预处理时间,浸出率提高不显著。XRD和SEM分析表明,原样表面光滑、结构致密,20min微波预处理矿物表面粗糙微裂纹生长发育明显,60min微波预处理矿物晶粒生长完善。To address low uranium leaching rate of uranium tailings with large amount of gangue structure,idea of microwave pretreatment to destroy gangue structure and improve uranium leaching rate was proposed.Effect of microwave pretreatment time on uranium leaching rate was investigated by single factor method.The results show that uranium concentration in lixivium is 72.75 mg/L after 20 minutes of microwave pretreatment,and uranium leaching rate is 82.92%,16.51 percentage points higher than that of untreated.Excessively prolonging microwave pretreatment time does not significantly improved uranium leaching rate.XRD and SEM analysis show that original sample has smooth surface and compact structure.The surface roughness of micro-cracks after 20 min pretreatment is obvious,and grain growth after 60 min pretreatment is perfect.

关 键 词：低品位铀矿石 微波预处理 生物浸出 

分 类 号：TL212.12[核科学技术—核燃料循环与材料]