评估波兰煤炭燃烧底层灰中稀土元素的潜力
Zdzisław Adamczyk1, Joanna Komorek1, Barbara Białecka2
1Faculty of Mining, Safety Engineering and Industrial Automation, Silesian University of Technology, ul. Akademicka 1, 44-100 Gliwice, Poland.
Materials (Basel, Switzerland)
|September 14, 2024
概括
波兰底层灰含有稀土元素 (REY),但度低于有利可图的回收水平. 进一步加工可以提高其价值作为替代性REY来源.
科学领域:
- 地质化学 地质化学
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
背景情况:
- 燃煤发电厂产生大量的底层灰,这是一个潜在的工业应用的副产品.
- 稀土元素 (REY) 对现代技术至关重要,并且越来越多地寻求替代来源.
- 了解REY含量和工业副产品的特征,如底层灰,对于资源管理至关重要.
研究的目的:
- 评估波兰底层灰作为稀土元素 (REY) 的潜在来源.
- 为了比较底层灰的REY潜力与来自同一煤炭燃烧过程的飞灰的REY潜力.
- 根据其成分和特征,确定从底层灰中回收REY的可行性.
主要方法:
- 使用X射线衍射 (XRD) 来分析灰的相位组成.
- 使用诱导合等离子体质谱法 (ICP-MS) 来确定REY的度.
- 灰样本根据它们的波佐兰和化学特性 (酸盐,铁酸盐) 进行分类.
主要成果:
- 底层灰和飞灰表现出相似的相位和化学成分.
- 测试灰中的REY含量在199-286ppm之间,低于全球沉积物的平均水平.
- REY含量低于被认为有利于直接从煤灰中回收的门.
- 底层灰被归类为惰性低到惰性中等的pozzolanic,并富含破碎物质.
结论:
- 波兰底层灰,类似于飞,具有可比的工业价值作为替代的REY来源.
- 目前在底层灰中的REY度在经济上不适合直接开采.
- 从底层灰的特定部分,如无形玻璃,岩和矿物颗粒中回收REY,可能会增加其工业意义.
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