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http://dx.doi.org/10.7844/kirr.2018.27.6.68

Distribution and Evaluation of Rare Earth Elements contained in Coal Ashes from Korea Circulating Fluidized Bed Combustion (CFBC)  

Kim, Young-Jin (Department of Research and Development, Korea Institute of Limestone and Advanced Materials)
Baek, Chul-Seoung (Department of Research and Development, Korea Institute of Limestone and Advanced Materials)
Seo, Jun-Hyung (Department of Research and Development, Korea Institute of Limestone and Advanced Materials)
Choi, Moon-Kwan (Department of Research and Development, Korea Institute of Limestone and Advanced Materials)
Cho, Kye-Hong (Department of Research and Development, Korea Institute of Limestone and Advanced Materials)
Ahn, Ji-Whan (Center for Carbon Mineralization, Korea Institute of Geoscience and Mineral Resources)
Publication Information
Resources Recycling / v.27, no.6, 2018 , pp. 68-75 More about this Journal
Abstract
The rare earth elements (REE) contents in coal ashes generated from domestic circulating fluidized bed combustion (CFBC) were identified for evaluating the exploitation possibilities for recovering rare earth elements. Total REE contents for all of the samples in this study ranged from 82.2 ~ 311.7 ppm, much lower than the 403.5 ppm given on the average value of world coal ash. As a result of analysis using REE concentration and Outlook coefficient, six types of coal ashes falls in the unpromising area (I). These results suggest that it is difficult to recover rare earth element from coal ashes at this stage. It has been confirmed that to recover rare earth elements in coal ashes, research on the pretreatment and concentration process for critical REE is requirement.
Keywords
circulating fluidized bed combustion; coal ash; rare earth elements; evaluation;
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