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Title: Distribution of Lanthanides, Yttrium, and Scandium in the Pilot-Scale Beneficiation of Fly Ashes Derived from Eastern Kentucky Coals

Abstract

In this study, Central Appalachian coal-derived fly ashes from two power plants were beneficiated in a pilot-scale facility in order to produce a product with a relatively consistent concentration of rare earth elements (REE). The <200-mesh final fly ash product was produced by removing the carbon- and Fe-rich particles prior to screening at 200 mesh (75 µm). The Plant D fly ash had high concentrations of CaO and SO3, which were diminished through the two months when the ash was being beneficiated, representing a consequence of the heat, humidity, and excessive rainfall in the Kentucky summer. The high CaO and SO3 concentrations through the early runs likely contributed to the lower REE in the <200-mesh products of those runs. Of the non-REE minor elements, Ba, V, Mn, Zn, and As showed the greatest between-run variations within the runs for each plant. The overall REE concentrations proved to be similar, both on a between-run basis for the individual fly ash sources and on a between-plant basis. Variations in fly ash quality will occur in larger-scale operations, so on-going attention to the fly ash quality and the response of the fly ash to beneficiation is necessary. Changes in the Plant D flymore » ash with time imply that both the freshness of the original ash and the length and conditions of its storage at the site of beneficiation could be factors in the quality and consistency of the processed fly ash.« less

Authors:
ORCiD logo; ; ; ; ; ; ; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1595167
Grant/Contract Number:  
FE0027167
Resource Type:
Published Article
Journal Name:
Minerals
Additional Journal Information:
Journal Name: Minerals Journal Volume: 10 Journal Issue: 2; Journal ID: ISSN 2075-163X
Publisher:
MDPI AG
Country of Publication:
Switzerland
Language:
English

Citation Formats

Hower, James C., Groppo, John G., Joshi, Prakash, Preda, Dorin V., Gamliel, David P., Mohler, Daniel T., Wiseman, John D., Hopps, Shelley D., Morgan, Tonya D., Beers, Todd, and Schrock, Michael. Distribution of Lanthanides, Yttrium, and Scandium in the Pilot-Scale Beneficiation of Fly Ashes Derived from Eastern Kentucky Coals. Switzerland: N. p., 2020. Web. doi:10.3390/min10020105.
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Hower, James C., Groppo, John G., Joshi, Prakash, Preda, Dorin V., Gamliel, David P., Mohler, Daniel T., Wiseman, John D., Hopps, Shelley D., Morgan, Tonya D., Beers, Todd, & Schrock, Michael. Distribution of Lanthanides, Yttrium, and Scandium in the Pilot-Scale Beneficiation of Fly Ashes Derived from Eastern Kentucky Coals. Switzerland. doi:https://doi.org/10.3390/min10020105
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Hower, James C., Groppo, John G., Joshi, Prakash, Preda, Dorin V., Gamliel, David P., Mohler, Daniel T., Wiseman, John D., Hopps, Shelley D., Morgan, Tonya D., Beers, Todd, and Schrock, Michael. Sun . "Distribution of Lanthanides, Yttrium, and Scandium in the Pilot-Scale Beneficiation of Fly Ashes Derived from Eastern Kentucky Coals". Switzerland. doi:https://doi.org/10.3390/min10020105.
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@article{osti_1595167,
title = {Distribution of Lanthanides, Yttrium, and Scandium in the Pilot-Scale Beneficiation of Fly Ashes Derived from Eastern Kentucky Coals},
author = {Hower, James C. and Groppo, John G. and Joshi, Prakash and Preda, Dorin V. and Gamliel, David P. and Mohler, Daniel T. and Wiseman, John D. and Hopps, Shelley D. and Morgan, Tonya D. and Beers, Todd and Schrock, Michael},
abstractNote = {In this study, Central Appalachian coal-derived fly ashes from two power plants were beneficiated in a pilot-scale facility in order to produce a product with a relatively consistent concentration of rare earth elements (REE). The <200-mesh final fly ash product was produced by removing the carbon- and Fe-rich particles prior to screening at 200 mesh (75 µm). The Plant D fly ash had high concentrations of CaO and SO3, which were diminished through the two months when the ash was being beneficiated, representing a consequence of the heat, humidity, and excessive rainfall in the Kentucky summer. The high CaO and SO3 concentrations through the early runs likely contributed to the lower REE in the <200-mesh products of those runs. Of the non-REE minor elements, Ba, V, Mn, Zn, and As showed the greatest between-run variations within the runs for each plant. The overall REE concentrations proved to be similar, both on a between-run basis for the individual fly ash sources and on a between-plant basis. Variations in fly ash quality will occur in larger-scale operations, so on-going attention to the fly ash quality and the response of the fly ash to beneficiation is necessary. Changes in the Plant D fly ash with time imply that both the freshness of the original ash and the length and conditions of its storage at the site of beneficiation could be factors in the quality and consistency of the processed fly ash.},
doi = {10.3390/min10020105},
journal = {Minerals},
number = 2,
volume = 10,
place = {Switzerland},
year = {2020},
month = {1}
}
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DOI: https://doi.org/10.3390/min10020105
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