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首页> 外文期刊>Physics of atomic nuclei >A Flux Based on the Eutectic MnO-Al2O3 System for the Selective Extraction of Fissile Materials from Diffusion-Contaminated Metal Radioactive Waste by Induction Slag Remelting
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A Flux Based on the Eutectic MnO-Al2O3 System for the Selective Extraction of Fissile Materials from Diffusion-Contaminated Metal Radioactive Waste by Induction Slag Remelting

机译：基于共晶MnO-Al2O3系统的助熔剂，用于通过感应渣重熔从扩散污染的金属放射性废物选择性提取裂变材料

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摘要

In this study, the possibility of extracting over 99% of the fissile materials contained in metal radioactive waste by cold-crucible induction slag remelting is demonstrated. The flux based on the eutectic MnO-Al2O3 composition does not contain compounds used in non-ferrous and ferrous metallurgy that impede the subsequent hydrometallurgical slag processing and contaminate the final product (agents causing corrosion and gelation, as well as neutron poisons). The relatively high manganese-oxygen affinity eliminates the transition of the macrocomponents of the processed steel (iron and chromium) to the oxide phase. It is shown that the main components of the resulting slag (manganese and aluminum oxides) are represented by the acid-resistant phases of corundum and Mn0.89Al2.11O4 manganese spinel structurally similar to the galaxite mineral, while uranium, used as a fissile material dummy, is contained in the form of relatively large inclusions 3-10 mu m in size with a composition that corresponds to the UO2 formula, which is amenable to leaching with nitric acid.
机译：在这项研究中，通过冷坩埚感应熔渣重熔，可以提取金属放射性废物中99%以上的裂变材料。基于共晶MnO-Al2O3成分的助焊剂不包含有色金属和有色金属冶金中使用的化合物，这些化合物会阻碍后续的湿法冶金炉渣处理并污染最终产品（导致腐蚀和凝胶化的药剂，以及中子毒物）。相对较高的锰氧亲和力消除了加工钢的宏观成分（铁和铬）向氧化物相的转变。结果表明，所得炉渣的主要成分（锰和铝氧化物）由刚玉和Mn0的耐酸相表示。89Al2。11O4锰尖晶石在结构上与铝矾土矿物相似，而用作裂变材料模型的铀则以3-10μm大小的相对较大包裹体的形式存在，其成分符合UO2公式，易于用硝酸浸出。

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