Separation of coal combustion residue for critical element extraction and other bulk uses

Abstract

The demand for critical and rare earth elements is surging and coal combustion residue could be an alternate source of critical elements. Data on the concentration of critical and rare...

The distribution and enrichment characteristics of rare earth elements between coals and coal ashes from four coal-fired power plants

“…Since 2014, the United States has made signicant investments in various departments to quickly initiate the project of recovering REY from coal and coal ash. [24][25][26] Meantime, coal-producing countries such as Europe, [27][28][29] Russia, 30,31 Canada, 32 India, [33][34][35] South Africa, 36 and China [37][38][39][40][41] have also done extensive studies on the distribution and occurrence of REY in coal. Our team has also studied the occurrence of REY in coal and coal ash, revealing that REY in coal mainly exist in minerals, while most of the very ne minerals containing REY are wrapped in the glass phase of coal ash.…”