十红滩铀矿床矿石铀价态分析与浸取试验研究及其地质意义  

Research on valence state and leaching rate of uranium in ores from Shihongtan uranium deposit and it's geological significance

作　　者：彭新建[1] 裴玲云[2] 闵茂中[1] 

机构地区：[1]南京大学地球科学系 [2]核工业北京地质研究院,北京100029

出　　处：《铀矿地质》2003年第4期225-231,共7页Uranium Geology

基　　金：核工业铀矿地质科研基金 (HD2 0 0 1 3 6) ;国家自然科学基金 (No 40 1 73 0 3 1 );科技部攻关项目( 2 0 0 1BA60 9A 0 7 1 3 )资助

摘　　要：本文分析了采自十红滩铀矿床 3 1线和 3 9线勘探剖面中 1 0个矿石样品的铀含量和铀价态 ,并对其中具代表性的两个矿石样品进行了浸取试验。矿石样品的U4 + /U6 + 比值较大的变化范围( 0 82～ 1 81 ) ,表明了矿石中铀价态的多样性和赋存状态的复杂性。在基本达到浸取平衡的条件下 ,浸出率曲线在不同浸取液浓度、不同浸泡时间和不同氧化条件下 ,呈现较好的变化规律 ,据此可半定量确定矿石中的活性铀与可溶性铀的含量。结合矿床地质和矿石特征 ,认为十红滩铀矿床矿石中的铀主要以分散吸附状态存在 ,从试验的角度证实了其具有可浸取性。uranium ore samples,collected from exploration sections No 31 and No 39,Shihongtan uranium deposit,were tested for uranium content and valence states.The wide range of U 4+ /U 6+ (0 82～1 8) indicates the variation of valence states and complexity of existing states of uranium at the ore deposit.The lixivial rates change regularly corresponding to different concentrations of lixiviant and lixiviating time.When the equilibrium is basically established,the lixivial rates of sample K01 and K02 are of stable values,which indicates the content of mobile uranium if no H 2O 2 is added,and the content of dissoluble uranium if H 2O 2 is added.Based on the geologic setting of the deposit and the characteristics of ores,the experiment results show that,the uranium in ores mainly exists in the form of dispersive adsorption,and can be leached during in situ leach mining.

关 键 词：层间氧化带砂岩型铀矿 赋存状态 浸取 试验 

分 类 号：P619.1[天文地球—矿床学] P631.621[天文地球—地质学]