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| In-Situ Observation of Influence of MgO on High Temperature Properties of Sinter Ore |
| PEI Yuan-dong1,2,3, WU Sheng-li1,2, ZHAO Zhi-xing3, AN Gang4, SU Bo1,2, PAN Wen3 |
1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China
2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
3. Shougang Research Institute of Technology Beijing, Beijing 100043, China
4. Ironmaking Plant, Shougang Jingtang Co., Tangshan 063200, Hebei, China |
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Abstract Sinter ore was solidified by liquid phase during sintering process, the formation and fluidity of the liquid phase on sinter quality plays a crucial role in determining quality of sinter ore. With the deterioration of ore resource quality, the TFe content of sinter decreased. Compared with Al2O3 and SiO2, MgO belongs to ingredients added voluntarily, and amount of MgO affects the melting and fluidity of melts and TFe of sinter ore. According to Jingtang mixture, effect of MgO in sintering mixture on sintering high temperature properties was in situ observed by confocal lasering scanning microscopy (CLSM for short)in the first time, and compared with sintering basic characteristics equipment. It can be found that, compared with blended ore without MgO, initial and massive melt forming temperature increase above 50 ℃ when adding MgO with the mass percent of it from 1.7% to 2.0%, and fluidity velocity decreases apparently. As the mass percent of MgO decreased from 2.3% to 0.3% in sintering basic characteristics test, fluidity index increases from 0.7 to 1.9 levels. At last, mass percent of MgO in sinter of Jingtang reduced from 2.0% to 1.5% with better sinter quality.
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Received: 05 November 2013
Published: 02 November 2014
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2014, Vol. 49 
