Abstract
Carbon feedstocks used in power, chemical and metallurgical industries typically contain numerous minerals or impurities that liquefy during high temperature processing to form slag as a byproduct. Slags have many industrial applications, for example, as construction materials and for element recovery. In addition to other variables, the extent of slag utilization is dependent on its composition and post treatments. In this work, the influence of temperature and phosphorus additions on phase evolution in coal slag was investigated. Synthetic slag mixtures with varying AlPO4 contents (0–14 wt%) were heated from 1380–1470 °C in air, then water-quenched to preserve the phases formed. SEM/EDS, XRF and XRD analyses were performed before/after testing to gain insight about slag chemistry and phases present. It was found that coal slag exhibited a large solubility of phosphorous, affecting morphology of mullite formed under the conditions studied. Results obtained and their significance are discussed.
This is a preview of subscription content, log in via an institution to check access.
References
J. Nakano et al., Phase equilibria in synthetic coal–petcoke slags (Al2O3–CaO–FeO–SiO2–V2O3) under simulated gasification conditions. Energy Fuels 25(7), 3298–3306 (2011)
J. Bennett et al., Slag characterization for the development of new and improved service life materials in gasifiers using flexible carbon feedstock, in Advances in Materials Science for Environmental and Nuclear Technology II ed. by S.K. Sundaram et al. (2011), pp. 3–16
H. Schneider, J. Schreuer, B. Hildmann, Structure and properties of mullite—a review. J. Eur. Ceram. Soc. 28(2), 329–344 (2008)
Acknowledgements
This technical effort was performed in support of the National Energy Technology Laboratory’s ongoing research under the RES contract DE-FE0004000. This research was also supported in part by an appointment to the National Energy Technology Laboratory Research Participation Program, sponsored by the U.S. Department of Energy and administered by the Oak Ridge Institute for Science and Education. The authors would like to thank Eric Krabbe, Richard Chinn and Keith Collins of the National Energy Technology laboratory, Albany, OR for their assistance with testing and SEM, XRD and XRF runs.
Disclaimer
This project was funded by the Department of Energy, National Energy Technology Laboratory, an agency of the United States Government, through a support contract with AECOM. Neither the United States Government nor any agency thereof, nor any of their employees, nor AECOM, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2017 The Minerals, Metals & Materials Society
About this paper
Cite this paper
Abu El Hawa, H., Nakano, J., Nakano, A., Bennett, J.P. (2017). The Influence of Phosphorous Additions on Phase Evolution in Molten Synthetic Coal Slag. In: Wang, S., Free, M., Alam, S., Zhang, M., Taylor, P. (eds) Applications of Process Engineering Principles in Materials Processing, Energy and Environmental Technologies. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-51091-0_20
Download citation
DOI: https://doi.org/10.1007/978-3-319-51091-0_20
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-51090-3
Online ISBN: 978-3-319-51091-0
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)