【作者】 孙明；

【导师】 刘云海；

【作者基本信息】 东华理工大学 ， 化学工程， 2012， 硕士

【摘要】 本论文通过对北方某砂岩铀矿的岩芯样品分析测试以及静态浸出和动态浸出的综合研究，了解不同条件下该铀矿岩芯中铀的浸出效果，确定该铀矿采冶的浸出剂、氧化剂类型和浸出方法，了解不同矿层对铀浸出效果的影响程度，优选浸出剂及配方，提出合理的地质工艺参数，结合浸出液的实际浓度，选用成熟的离子交换分离富集水冶技术，获得水冶工艺的相关参数，为制定现场条件试验浸出方案和铀回收工艺提供依据。研究发现：该矿床中的铀资源，采用混合碱法（碳酸钠和碳酸氢钠）或地层水和二氧化碳为浸出剂，氧气为氧化剂的条件下，浸出效果较好，浸出溶液采用201×7树脂、密实固定床的吸附方式，氢氧化钠沉淀的水冶工艺能够将采冶出的铀有效回收，采冶工艺还具有可观的经济效益和社会效益。更多还原

【Abstract】 Through comprehensive studies including analytical test, static leaching exper-iments and dynamic leaching experiments to finding out the leaching efficiency ofthe drill cores of the uranium in various conditions, we determined the kind of l-eaching agent and oxidant and the methods of leaching, which were satisfactoryfor the hydrometallurgy of the uranium deposit. In our report, it was gave a deta-iled description that the influence degree of seam distribution and the optimum l-eaching agent formulation on the leaching efficiency of the drill cores, and the r-easonable geological technical parameters were issued. Based on the actual conce-ntration of the leachate, we got the related parameters of hydrometallurgical proc-ess by adopting pre-concentration and separation via ion exchange resin method.This may provide references for the design of leaching program and uranium rec-overy technics in the field.The studies found that the uranium was leached efficiently by adopting mixed alkali(sodium carbonate plus sodium bicarbonate) or stratum water in which carbon dioxidedissolved as a leaching agent, oxygen as a oxidant. The leachate was pass through packedfixed bed with201×7resin, and the effluent was precipitated using sodium hydroxide.By using the above mentioned process, the beneficial result of economy and society waswell got, while the satisfactory recovery rate was got.更多还原