Distribution of Rare Earth Elements in Ash from Lignite Combustion in Polish Power Plants

被引:0
作者
Adamczyk, Zdzislaw [1 ]
Komorek, Joanna [1 ]
Kokowska-Pawlowska, Magdalena [1 ]
Nowak, Jacek [1 ]
机构
[1] Silesian Tech Univ, Fac Min Safety Engn & Ind Automat, Akad 2, PL-44100 Gliwice, Poland
关键词
lignite; fly ash; bottom ash; rare earth elements; yttrium; REY; critical raw materials; amorphous glass; COAL FLY-ASH; TRACE-ELEMENTS; CLASSIFICATION; RESOURCES; POLAND;
D O I
10.3390/ma17184477
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Rare earth elements are an essential critical raw material in the development of modern technologies and are highly sensitive to both supply chain disruptions and market turbulence. The presented study examines the characteristics of fuel, fly ash, and bottom ash from lignite combustion in power plant units. Also, we attempted to determine the amount of amorphous glass in the ashes and whether and to what extent the glass from the ash samples is bound to REY. The suitability of the ash was assessed as an alternative source of REY. The fuel and ash samples were acquired from power plants in Poland. The tests determined the fuel quality parameters, including the chemical and phase composition, of amorphous glass using ICP-MS and XRD methods, respectively. The study showed that all ash samples dissolved in 4% HF were enriched in REY. The efficiency of REY enrichment varied, and its presence in the residue samples was found to be in similar proportions compared to the raw sample. All ash residue samples were enriched in critical elements. The obtained values of the Coutl prospective coefficient allowed for the classification of some of the analyzed ashes and their residues after dissolution in 4% HF as prospective REY raw materials.
引用
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页数:21
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