Abstract
A hard carbon build-up layer often forms on the flue wall surface in anode baking furnaces . The layer accumulates over thermal circles and needs to be mechanically removed regularly to ensure sufficient space for the anodes between flue walls. The underlying mechanisms are still unknown and the extent of the carbon build-up varies from plant to plant. The build-up on the flue wall, taken from an autopsy of an open top furnace, has been examined. Microstructure and phase compositions of the carbon build-up, especially towards the refractory interface, were studied by optical microscopy, X-ray computed tomography (CT), SEM/EDS, and XRD. Pyrolytic carbon was found to be the main part of the carbon build-up layer in addition to packing coke particles. The transport of silicon from the refractory material, condensating on the flue wall surface, is found as nucleation sites for the formation of carbon build-up. Formation mechanisms of the carbon build-up are proposed with reaction schemes supported by thermodynamic calculations.
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References
P.R.T. Tiba, et al., Systemic analysis of flue wall bricks used on anode baking furnaces. Light Metals, 1015–1019 (2010)
P. Prigent et al., The effect of the addition of fine andalusite particles in refractory bricks on gaseous corrosion. JOM 60(5), 58–63 (2008)
F. Brunk, Corrosion and behaviour of fireclay bricks used in the flues of open anode baking furnaces. Light Metals, 641–646 (1995)
F. Keller, P.O. Sulger, Anode Baking, 2nd edn. (R&D Carbon Ltd., Sierre, Switzerland, 2008)
T. Brandvik, Z. Wang, T. Grande, Investigations of spent refractory lining in an anode baking furnace. Light Metals (2017)
C.W. Bale et al., FactSage thermochemical software and databases. Calphad-Comput. Coupling Phase Diagrams Thermochemistry 26(2), 189–228 (2002)
X. Bourrat et al., Low temperature pyrocarbons: a review. J. Braz. Chem. Soc. 17, 1090–1095 (2006)
M. Guellali et al., Textures of pyrolytic carbon formed in the chemical vapor infiltration of capillaries. Carbon 41(1), 97–104 (2003)
G.L. Vignoles et al., CVD and CVI of pyrocarbon from various precursors. Surf. Coat. Technol. 188–189, 241–249 (2004)
P. Delhaes, Chemical vapor deposition and infiltration processes of carbon materials. Carbon 40(5), 641–657 (2002)
R.E. Wright, H.I. Wolff, Refractory problems in production of hydrogen by pyrolysis natural gas. J. Am. Ceram. Soc. 31(2), 31–38 (1948)
R.F. Davis, I.A. Aksay, J.A. Pask, Decomposition of Mullite. J. Am. Ceram. Soc. 55(2), 98–101 (1972)
Acknowledgements
The present work was carried out in the project “Reactivity of Carbon and Refractory Materials used in Metals Production Technology” (CARMA), financed by the Research Council of Norway, Hydro Aluminium, Alcoa Norway, Skamol, and Elkem Carbon. Permission to publish the results is gratefully acknowledgement.
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Wang, Z., Rørvik, S., Ratvik, A.P., Grande, T. (2017). Formation of Carbon Build-Up on the Flue Wall of Anode Baking Furnace. In: Ratvik, A. (eds) Light Metals 2017. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-51541-0_151
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DOI: https://doi.org/10.1007/978-3-319-51541-0_151
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