Chlorination of UO2, PuO2 and rare earth oxides using ZrCl4 in LiCl–KCl eutectic melt
Chlorination of UO2, PuO2 and rare earth oxides using ZrCl4 in LiCl–KCl eutectic melt
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DOI：
10.1016/j.jnucmat.2004.11.002
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发表时间：
2005-04
影响因子：
3.1
通讯作者：
Y. Sakamura;Tadashi Inoue;T. Iwai;H. Moriyama
中科院分区：
文献类型：
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作者：
Y. Sakamura;Tadashi Inoue;T. Iwai;H. Moriyama
研究了一种新的熔盐浴氯化法，用于核燃料的高温冶金后处理。ZrCl 4与氧具有高反应性，但对钢等难熔金属没有腐蚀性。稀土氧化物（La_2O_3，CeO_2，Nd_2O_3，Y_2O_3）和锕系元素氧化物（UO_2，PuO_2）与ZrCl_4在LiCl-KCl低共熔盐中于773 K反应，得到金属氯化物溶液和ZrO_2沉淀。添加金属锆作为还原剂是有效的氯化二氧化物。当氧化物为粉末形式时，观察到反应快速进行。循环伏安法提供了一种确定反应何时完成的方便方法。结果表明，氯化锆氯化法操作简单，无腐蚀性气体，是一种有效的方法。
A new chlorination method using ZrCl4in a molten salt bath has been investigated for the pyrometallurgical reprocessing of nuclear fuels. ZrCl4has a high reactivity with oxygen but is not corrosive to refractory metals such as steel. Rare earth oxides (La2O3, CeO2, Nd2O3and Y2O3) and actinide oxides (UO2and PuO2) were allowed to react with ZrCl4in a LiCl–KCl eutectic salt at 773K to give a metal chloride solution and a precipitate of ZrO2. An addition of zirconium metal as a reductant was effective in chlorinating the dioxides. When the oxides were in powder form, the reaction was observed to progress rapidly. Cyclic voltammetry provided a convenient way of establishing when the reaction was completed. It was demonstrated that the ZrCl4chlorination method, free from corrosive gas, was very simple and useful.