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區(qū)域熔煉法凈化金屬鈾的理論與實驗研究
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Numerical and Experimental Studies of Zone Melting for Uranium Purification
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    摘要:

    通過理論計算分析了區(qū)域熔煉過程中熔化區(qū)域?qū)挾?、區(qū)熔次數(shù)等對U提純效果的影響。實驗采用理論優(yōu)化條件，以U中Al、Mo、W、Ni、Ca、C等元素為研究對象，利用原子發(fā)射光譜（ICP-AES）和金相（OM）分析了提純前/后鈾中雜質(zhì)元素的濃度、夾雜物分布特點。結(jié)果表明：區(qū)域熔煉法對鈾中雜質(zhì)元素有一定的去除作用，試棒中部的待測雜質(zhì)總量從1189 μg/g降低至402 μg/g。對W，Ni，C的去除效率高，Al和Mo的去除效果不明顯。夾雜物尺寸減小，沿熔化區(qū)域方向富集。

    Abstract:

    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.

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石 潔,羅 超,張新建,王震宏,劉 勇,王懷勝.區(qū)域熔煉法凈化金屬鈾的理論與實驗研究[J].稀有金屬材料與工程,2013,42(4):833~836.[Shi Jie, Luo Chao, Zhang Xinjian, Wang Zhenhong, Liu Yong, Wang Huaisheng. Numerical and Experimental Studies of Zone Melting for Uranium Purification[J]. Rare Metal Materials and Engineering,2013,42(4):833~836.]
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  • 收稿日期:2012-04-27
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