焚烧底灰细分的资源回收潜力
Michal Šyc1, Jakub Výravský2, Héctor Muñiz Sierra1
1Institute of Chemical Process Fundamentals, Czech Academy of Sciences, Rozvojová 135, 165 00, Prague 6, Czech Republic.
Waste management (New York, N.Y.)
|October 28, 2024
概括
这项研究使用电子显微镜分析了微型焚烧底灰的组成. 它揭示了大量的金属和铜含量,这对于优化从这种未充分利用的废物流中回收金属至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
- 分析化学 分析化学
背景情况:
- 焚烧底灰 (IBA) 含有贵重金属,但用于回收的细颗粒 (<2毫米) 往往被忽视.
- 这些细颗粒构成了IBA质量的30-40%,代表着一个重要的未开发资源.
- 了解精细IBA中的材料组成和金属特异性对于开发高效的回收工艺至关重要.
研究的目的:
- 为了描述焚烧底灰的微小部分 (<2,000微米) 的元素和矿物质成分.
- 为了确定关键金属的化学特异性,包括 (Al),铜 (Cu),铁 (Fe), (Zn) 和黄金 (Au).
- 为优化从微型IBA颗粒中回收金属的战略提供必要的数据.
主要方法:
- 使用了一个TIMA (The)! 电子显微镜,这是采矿业适用于详细材料分析的工具.
- 对底层灰的细微部分中的颗粒进行化学特异化分析.
- 量化了Al,Cu,Fe,Zn和Au在<2,000μm大小小部分中的存在和形式.
主要成果:
- 金属约占总的15%,通常涂有氧化 (Al2O3).
- 金属铜及其合金约占铜的60%,另外30%为铜氧化物.
- 在微细分数中检测到最小的金属铁 (Fe) 和 (Zn);所有黄金 (Au) 都在单个粒子 (4 mg/kg散装) 中被发现.
结论:
- 焚烧底灰的细微部分含有大量可回收的金属和铜.
- 金属在细颗粒中的物种化和存在需要量身定制的回收方法,考虑到颗粒大小和释放等因素.
- 这种详细的组合分析为提高从焚烧底灰的金属回收效率提供了基础.
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