Abstract
Fly ash, generated during the combustion of coal for energy production, is an industrial by-product which is recognized as an environmental pollutant. In this paper, thermodynamic calculations and experiments in a tubular furnace reactor were conducted to investigate the process of pelletizing chlorination of fly ash. The thermodynamic calculations indicated that with the increase of the chlorination temperature, the Gibbs free energy of the chlorination reaction is negative, and this demonstrates the thermodynamics feasibility of pelletizing chlorination process. Experiments results show that the alumina chlorination efficiency was up to 70% when the pellet diameter was 8 mm and the C/Al was 3:1 at 1050 °C for 30 min. The effect of alumina chlorination efficiency in pelletizing chlorination process mainly depended on the temperature, chlorination time and pellet diameter. These findings provide useful information for understanding the pelletizing chlorination process, facilitating the development of pelletizing chlorination metallurgy in efficient clean utilization of fly ash.
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Acknowledgements
Project (U1710257, U1202274, U1402271, 51004033, 51374064) supported by National Natural Science Foundation of China, Project (No. L2014096) supported by Science and Technology Research Projects of Education department of Liaoning.
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Wang, L. et al. (2018). Thermodynamics Analysis on Process of Pelletizing Chlorination of Fly Ash. In: Martin, O. (eds) Light Metals 2018. TMS 2018. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-72284-9_13
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DOI: https://doi.org/10.1007/978-3-319-72284-9_13
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