新疆某铀矿床淡化地下水碱法地浸试验研究  

Alkaline in-situ leaching simulation test of a uranium deposit in Xinjiang under condition of diluting groundwater

作　　者：高柏[1] 史维浚[1] 邢拥国 赵乔付 孙占学[1] 刘金辉[1] 

机构地区：[1]东华理工大学,江西抚州344000 [2]新疆中核天山铀业有限公司,新疆伊宁835000

出　　处：《铀矿冶》2011年第3期130-134,共5页Uranium Mining and Metallurgy

基　　金：国家自然科学基金资助项目(40872165);江西省科技厅"三援"项目(2009AF00100)资助

摘　　要：在淡化地下水的条件下,研究了某砂岩铀矿床近中性条件下碱法地浸时,溶解氧和HCO3-质量浓度及影响因素对铀的浸出关系。研究结果表明:铀的浸出浓度、浸出速率与HCO3-质量浓度关系密切,HCO3-质量浓度高,铀的浸出浓度亦高,浸出速度快;但存在最佳HCO3-质量浓度和HCO3-质量浓度阈值的限制条件,超出最佳HCO3-质量浓度,浸出方法不是最经济,超过阈值条件,存在堵塞隐患;HCO3-质量浓度还受碳酸钙沉淀因素制约,与溶浸剂的pH值关系密切;溶解氧能影响浸出浓度和铀浸出率,溶浸剂中溶解氧含量增大,铀浸出率提高。The reagents used in in-situ leaching of uranium include NH4HCO3 and dissolved oxygen after groundwater is diluted.The relation between the reagent concentration and leaching effect is studied under condition of diluting groundwater.The results show that uranium concentration in lixivium and leaching rate are closely related to HCO-3 concentration.There are optimal value of HCO-3and liminal value of HCO-3 during leaching uranium.The optimal technology parameter of HCO-3 concentration can be decided according the values.The more dissolved oxygen in the leaching system,the better leaching effect of uranium.So,it is a key technology for improving leaching effect of uranium to increase dissolved oxygen concentration.But the HCO-3 concentration is controlled by the condition which causes precipitation of CaCO3,and has connection with pH and Ca2＋ concentration.

关 键 词：铀矿床 碱法地浸 溶浸剂 阈值 地下水 

分 类 号：X513[环境科学与工程—环境工程]