Thermodynamic analysis of separation of alloying elements in recycling of end-of-life titanium products
Thermodynamic analysis of separation of alloying elements in recycling of end-of-life titanium products
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DOI：
10.1016/j.seppur.2012.01.008
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发表时间：
2012-03-22
影响因子：
8.6
通讯作者：
Nagasaka, T.
中科院分区：
文献类型：
--
作者：
Lu, X.;Hiraki, T.;Nagasaka, T.
分离和控制不需要的元素是回收废料或报废（EoL）金属产品的关键，因为再生金属的质量通常会受到废料中合金元素的污染。然而，很少有人知道它们的可去除性或可控性，因为它们通常不存在于从天然矿石生产原生金属中。定量地讨论了电熔钛制品重熔过程中31种合金元素在金属、渣、气相中的分配比。我们的研究结果表明，典型的钛合金元素- Al，Fe和V -在重熔钛中通过氧化或蒸发基本上是不可控的。这表明应避免将商业纯钛（CP-Ti）和其他钛合金混合。因此，开发从钛废料中分离合金元素以实现可持续钛回收的新技术备受期待。(C)2012爱思唯尔有限公司版权所有。
The separation and control of undesired elements are key to recycling scrap or end-of-life (EoL) metal products, as the quality of regenerated metals is often impaired by contamination from the alloying elements in the scrap. However, little is known of their removability or controllability because they are normally absent in the production of primary metal from natural ore. Here, the distribution ratios of 31 kinds of alloying element among the metal, slag, and gas phases in the re-melting of EoL titanium products were quantitatively discussed. Our results clarified that the typical titanium alloying elements - Al, Fe, and V - are essentially uncontrollable in re-melted titanium by oxidation or evaporation. This suggests that the mixing of commercially pure titanium (CP-Ti) and other titanium alloys should be avoided. Hence, the development of new technologies to separate alloying elements from titanium scraps for sustainable titanium recycling is highly anticipated. (C) 2012 Elsevier B.V. All rights reserved.