METALS AND METAL MATRIX COMPOSITES |
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Kinetics of Fe-C Alloy Sheets During Gas-Solid Decarbonization in Ar-CO-CO2 |
SUN Caijiao, AI Liqun, HONG Lukuo, ZHOU Meijie, HOU Yaobin, ZHOU Yuqing, MENG Fanjun
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College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, China |
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Abstract In recent years, a new solid-state steelmaking process has attracted extensive attention, and this process makes pig iron directly casted and then decarburized in an oxidizing atmosphere for steelmaking. This scheme can significantly shorten the production process of thin strips and reduce inclusions in the steel. This research based on the Fe-C alloy sheets of different thickness as the foundation exploreed the kinetics of gas-solid decarbonization in Ar-CO-CO2 at different temperature following high temperature gas-solid reaction decarburization mechanism. The results showed that the diffusion of carbon to the reaction interface was the restricted link for the decarburization reaction, with the increase of the decarburization temperature and holding, the content of decarburization improving. The decarburization rate was also improved by reducing the thickness of Fe-C alloy sheets under the same condition. The relationship between decarburization rate and decarburization temperature of 2 mm Fe-C alloy sheets can be approximately expressed as k=-0.144+1.183×10-4 T. The results illustrated that the solid phase decarburization reaction can be approximate to the first-order reaction in Ar-CO-CO2, and the apparent activation energy of the whole decarburization reaction (Ea) was 124.7 kJ/mol.
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Published: 25 December 2021
Online: 2021-12-27
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Fund:This work was financially supported by Natural Science Foundation of Hebei Province(E2018209284,E2019209160),Basic Science and Technology Research Project of Hebei Education Department (JQN2019007),Postgraduate Innovation Funding Project of Hebei Province (CXZZBS2020131). |
About author: Caijiao Sunreceived master's degree in metallurgical engineering from North China University of Science and Technology in 2015 and studied for a doctorate in the College of Metallurgy and Energy of North China University of Science and Technology. Her research focuses on the research of new steelmaking technology and comprehensive utilization of resources. |
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