Abstract
Policies for reducing NOx emissions have led power plants to restrict O2, resulting in high-carbon fly ash production. Therefore, some potentially useful fly ash, such as the economizer fly ash, is discarded without a thorough knowledge of its composition. In order to characterize this type of fly ash, samples were collected from the economizer of a Portuguese power plant burning two low-sulfur bituminous coals. Characterization was also performed on economizer fly ash subsamples after wet sieving, density and magnetic separation. Analysis included atomic absorption spectroscopy, loss-on-ignition, scanning electron microscopy/energy-dispersive X-ray spectroscopy, optical microscopy, and micro-Raman spectroscopy.
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Paper number MMP-08-058.
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Valentim, B., Hower, J.C., Soares, S. et al. Petrographic characterization of economizer fly ash. Mining, Metallurgy & Exploration 26, 208–216 (2009). https://doi.org/10.1007/BF03402540
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DOI: https://doi.org/10.1007/BF03402540