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Thermal Separation and Leaching of Valuable Elements from Waste-Derived Ashes

机译：废物源性灰烬的热分离和浸出有价值的元素

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摘要

Recovery of trace elements from different industrial waste streams is important in realizing the goals of the circular economy. Ash streams from waste combustion can contain high levels of both toxic and valuable trace elements. These elements can be separated during the combustion process based on volatilization and condensation, as well as being separated in post-combustion processes, through thermal or leaching treatment. In this study, an overview is given of the thermal methods for recovery of valuable elements from ash fractions derived from waste incineration. In addition, a case study is presented of the behaviour of ash-forming elements in combustion of MSW and demolition wood, with special focus on the elements Co, Cu, and Sb. In conclusion, it is shown that thermodynamic modeling of high temperature processes can be a useful tool to predict ash behavior both during combustion and in the post combustion treatment of the ash.
机译：来自不同工业废物流的微量元素的回收对于实现循环经济的目标是重要的。废物燃烧中的灰料可以含有高水平的毒性和有价值的微量元素。这些元件可以在燃烧过程中基于挥发和冷凝，以及在后燃烧过程中分离通过热或浸出处理。在该研究中，给出了从废焚烧衍生的灰分系分的灰分分子回收有价值的元素的热方法。此外，提出了一种案例研究，其燃烧MSW和拆卸木材的烧结元件的行为，特别侧重于元件CO，Cu和Sb。总之，结果表明，高温过程的热力学建模可以是预测燃烧期间和灰烬后燃烧处理的灰分行为的有用工具。

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