Modification of Inclusions in Liquid Iron by Mg Treatment |
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| Affiliation: | 1. Key Laboratory for Ecological Metallurgy of Multimetallic Ores (Ministry of Education), Northeastern University, Shenyang 110819, Liaoning, China;2. Laiwu Steel Company, Ltd., Shandong Iron & Steel Group Co., Ltd., Laiwu 271104, Shandong, China;1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China;2. Technology Center of Liangang Group, Lianyuan Iron and Steel Corporation of Hunan Hualing, Loudi 417009, Hunan, China;1. Institute of Research of Iron and Steel (IRIS), Shasteel, Zhangjiagang 215625, Jiangsu, China;2. Hongfa Steelmaking Plant, Shasteel, Zhangjiagang 215625, Jiangsu, China;1. ShouGangJingTang Iron & Steel United Co., Ltd., Tangshan 063200, Hebei, China;2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;2. Research and Development Center, WISCO, Wuhan 430080, Hubei, China;1. Department of Materials Science and Engineering, National Cheng Kung University, Tainan, 70101, Taiwan;2. Iron & Steel Research & Development Department, China Steel Corporation, Kaohsiung 81233, Taiwan;3. Hierarchical Green-Energy Materials (Hi-GEM) Research Center, National Cheng Kung University, Tainan, 70101, Taiwan;4. Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan 70101, Taiwan;1. State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China;2. College of Civil Engineering, Fuzhou University, Fuzhou 350116, China;3. Institute of Architecture and Civil Engineering, Xihua University, Chengdu 610039, China |
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| Abstract: | Effect of Mg addition on the compositions of inclusions were studied. The results show that Mg can minimize the inclusions of steel obviously. Under the present condition, Mg deoxidation products of low-S content experimental steel would be changed in the order of Al2O3→MgAl2O4→Mg→Al–O–S→Mg–O–S. Mg deoxidation products of high-S content experimental steel generate Mg–S(–O)+MnS type inclusions, except for usual oxysulfide. And it is consistent with the results of thermodynamics calculation. Mg is preferred to react with oxide, compared with sulfide. The reaction reaches the equilibrium after 1 min or 5 min. It shows that the number and diameter of inclusions in all experimental steel samples are well under control, helping to improve the properties of steel. |
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| Keywords: | magnesium inclusion deoxidation desulfuration thermodynamic |
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