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| Law of Isothermal Crystallization Kinetic of C2S in Gas Quenching Slag Affected by CaO |
| ZHANG Yu-zhu,BAO Ji-wei,LONG Yue,XING Hong-wei |
| College of Metallurgy and Energy ,Hebei United University, Hebei Key Laboratory of Modern Metallurgy Technology, Tangshan 063009, Hebei, China |
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Abstract Gas quenching steel slag was adjusted the ingredients and reconstructed by CaO, and these slags were heated some time at different temperatures. The law of crystallization and growth of C2S in those slags with different CaO contents was analyzed by metallographic microscope and metallographic analysis software. The law of isothermal crystallization kinetic of C2S in gas quenching slag affected by CaO was studied by JMA equation. The results show that the C2S crystalline amount shows a decreasing trend after the first increase with the increasing of CaO content. When alkalinity of slag is 3.25 and thermostat time is 30min, the C2S crystalline amount reaches a maximum of 64.06%. When alkalinity of slag os 3.25, the isothermal crystallization activation energy of C2S reaches a minimum of -6.36kJ/mol, and the energy barrier of isothermal crystallization of C2S reaches minimum, which is most conducive for the crystallization of C2S.
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Received: 04 February 2013
Published: 25 November 2013
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2013, Vol. 48 
