Abstract
The study of hot metal dephosphorization by replacing part of lime with limestone at temperature of 1350–1400 °C has been carried out in this work, and the effects of slag temperature and substitution proportion of limestone were examined. Moreover, the influence of limestone decomposition and dissolution on the dephosphorization rate of hot metal was also investigated. It was found that adding limestone instead 50% in mass of lime and the intensive endothermic reaction of limestone decomposition would reduce the slag temperature and increase the slag viscosity . The dynamic condition of dephosphorization was obviously deteriorated, and the dephosphorization rate of hot metal decreased at 1350 °C, while the thermodynamic condition of dephosphorization could be improved and the dephosphorization rate of hot metal increased at 1400 °C.
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Acknowledgements
The authors gratefully acknowledge the National Natural Science Foundation of China (51574065, 51574066, 51774072 and 51774073) and the National Key R&D Program of China (No. 2017YFB0304201, 2017YFB0304203, 2016YFB0300602) which have made this research possible.
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© 2019 The Minerals, Metals & Materials Society
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Deng, H., Chen, M., Wang, N., Zhang, G. (2019). The Study of Hot Metal Dephosphorization by Replacing Part of Lime with Limestone. In: Jiang, T., et al. 10th International Symposium on High-Temperature Metallurgical Processing. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-05955-2_72
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DOI: https://doi.org/10.1007/978-3-030-05955-2_72
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