区域熔炼法净化金属铀的理论与实验研究  

Numerical and Experimental Studies of Zone Melting for Uranium Purification

作　　者：石洁[1] 罗超[1] 张新建[1] 王震宏[1] 刘勇[1] 王怀胜[1] 

机构地区：[1]表面物理与化学国家重点实验室,四川绵阳621907

出　　处：《稀有金属材料与工程》2013年第4期833-836,共4页Rare Metal Materials and Engineering

摘　　要：通过理论计算分析了区域熔炼过程中熔化区域宽度、区熔次数等对U提纯效果的影响。实验采用理论优化条件,以U中Al、Mo、W、Ni、Ca、C等元素为研究对象,利用原子发射光谱(ICP-AES)和金相(OM)分析了提纯前/后铀中杂质元素的浓度、夹杂物分布特点。结果表明:区域熔炼法对铀中杂质元素有一定的去除作用,试棒中部的待测杂质总量从1189μg/g降低至402μg/g。对W,Ni,C的去除效率高,Al和Mo的去除效果不明显。夹杂物尺寸减小,沿熔化区域方向富集。A mathematic model was established to analyze the effect of zone length and pass number on the uranium purification during zone melting process. The theoretically optimized condition was applied in the experiment and the elements of Al, Mo, W, Ni, Ca and C in uranium was chosen. The impurity concentration and inclusion distribution in uranium before and after purification were investigated by ICP-AES and OM. Results show that zone melting can remove the impurity elements in uranium. The total impurity concentration is reduced from 1189 μg/g to 402 μg/g. Zone melting has high removal efficiency to W, Ni, and C, but has low efficiency to Al and Mo. The inclusion decreases in size and enriches along the melting direction.

关 键 词：铀 区域熔炼 提纯 

分 类 号：TL21[核科学技术—核燃料循环与材料]