Abstract
The continuous cooling crystallization of a blast furnace slag was studied by the application of the differential scanning calorimetry (DSC) method. A kinetic model describing the correlation between the evolution of the degree of crystallization with time was obtained. Bulk cooling experiments of the molten slag coupled with numerical simulation of heat transfer were conducted to validate the results of the DSC methods. The degrees of crystallization of the samples from the bulk cooling experiments were estimated by means of the X-ray diffraction (XRD) and the DSC method. It was found that the results from the DSC cooling and bulk cooling experiments are in good agreement. The continuous cooling transformation (CCT) diagram of the blast furnace slag was constructed according to crystallization kinetic model and experimental data. The obtained CCT diagram characterizes with two crystallization noses at different temperature ranges.
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Acknowledgments
The authors thank the Ministry of Science and Technology of the People’s Republic of China for part of the financial support and Tangshan Steel for help with preparing the slag samples.
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Manuscript submitted July 11, 2011.
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Gan, L., Zhang, C., Shangguan, F. et al. A Differential Scanning Calorimetry Method for Construction of Continuous Cooling Transformation Diagram of Blast Furnace Slag. Metall Mater Trans B 43, 460–467 (2012). https://doi.org/10.1007/s11663-011-9631-1
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DOI: https://doi.org/10.1007/s11663-011-9631-1