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| Effect of Alkali Metal on Gas-Solid Reduction of Iron Oxide |
| PAN Wen1,2,WU Keng1,ZHAO Yong1,2,ZHAO Zhi-xing2,MIN Dong Joon3 |
1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing,Beijing 100083, China
2. Department of Iron and Steelmaking Technology, Shougang Research Institute of Technology, Beijing 100043, China
3. Department of Materials Science and Engineering, Yonsei University, Seoul 120-749, Republic of Korea |
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Abstract Fe2O3 and Fe2O3 doped with Na2O from 1.0 to 5.0 mass percent compacts were isothermally reduced at various temperatures from 1073 to 1273K with CO/CO2 mixed gas in a vertical resistance furnace. To determine the effect of Na2O on the reduction of Fe2O3 compacts, mass loss due to oxygen removal was continuously recorded from which the reduction rate and rate constant was obtained. The morphology change was also observed by SEM. The results show that Na2O retards the reduction of Fe2O3 compacts. Morphological examination of reduced compacts and the binary phase diagram of FeO-Na2O show liquid phase formation during the reduction, which decreases the rate of reduction. Porosity and volumetric expansion of reduced compacts were investigated, which shows that the volume and porosity of reduced Fe2O3-Na2O compacts are both decreased with higher Na2O content due to the existence of liquid phase.
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Received: 29 November 2012
Published: 18 June 2013
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| [1] |
赵宏博，程树森，白永强，等.高炉块状带矿石逐渐升温还原对料层透气性影响[J].钢铁,2011,46(11):10-
|
| [1] |
赵宏博，程树森，白永强，等.高炉块状带矿石逐渐升温还原对料层透气性影响[J].钢铁,2011,46(11):10-
|
| [2] |
张俊，李春增，朱利，等.添加MgO对烧结产物还原性能的影响[J].钢铁,2009,44(10):6-
|
| [2] |
张俊，李春增，朱利，等.添加MgO对烧结产物还原性能的影响[J].钢铁,2009,44(10):6-
|
| [3] |
R. Jaffarullah,AArumugam,V. K. Jha,et al.Reduction and Degradation Behavior of Sinter under Simulated Vertical Probe Trial Condition.[J].Iron Steel Inst. Jpn. Int,2008,48(7):918-
|
| [3] |
R. Jaffarullah,AArumugam,V. K. Jha,et al.Reduction and Degradation Behavior of Sinter under Simulated Vertical Probe Trial Condition.[J].Iron Steel Inst. Jpn. Int,2008,48(7):918-
|
| [4] |
K. Yamaguchi,KHiguchi,Y. Hosotani,et al.Influence of Micro Pore on Reducibility and Permeability of Sinter above 1000℃ in Blast Furnace. [J].Tetsu-to-Hagan,1998,84(10):702-
|
| [4] |
K. Yamaguchi,KHiguchi,Y. Hosotani,et al.Influence of Micro Pore on Reducibility and Permeability of Sinter above 1000℃ in Blast Furnace. [J].Tetsu-to-Hagan,1998,84(10):702-
|
| [5] |
A. A. El-Geassy.Gaseous Reduction of Mgo-doped Fe2O3 Compacts with Carbon-monoxide at 1173-1473K.[J].Iron Steel Inst. Jpn. Int,1996,36(11):1328-
|
| [5] |
A. A. El-Geassy.Gaseous Reduction of Mgo-doped Fe2O3 Compacts with Carbon-monoxide at 1173-1473K.[J].Iron Steel Inst. Jpn. Int,1996,36(11):1328-
|
| [6] |
A. A. El-Geassy.Reduction of CaO and/or MgO-doped Fe2O3 Compacts with Carbon-monoxide at 1173-1473K.[J].Iron Steel Inst. Jpn. Int,1996,36(11):1344-
|
| [6] |
A. A. El-Geassy.Reduction of CaO and/or MgO-doped Fe2O3 Compacts with Carbon-monoxide at 1173-1473K.[J].Iron Steel Inst. Jpn. Int,1996,36(11):1344-
|
| [7] |
A. A. El-Geassy.Stepwise Reduction of CaO and/or MgO Doped-Fe2O3 Compacts to Magnetite then Subsequently to Iron at 1173-1473K.[J].Iron Steel Inst. Jpn. Int,1997,37(9):844-
|
| [7] |
A. A. El-Geassy.Stepwise Reduction of CaO and/or MgO Doped-Fe2O3 Compacts to Magnetite then Subsequently to Iron at 1173-1473K.[J].Iron Steel Inst. Jpn. Int,1997,37(9):844-
|
| [8] |
A. A. El-Geassy.Influence of doping with CaO and/or MgO on stepwise reduction of pure hematite compacts. [J].Ironmaking and Steelmaking,1999,26(1):41-
|
| [8] |
A. A. El-Geassy.Influence of doping with CaO and/or MgO on stepwise reduction of pure hematite compacts. [J].Ironmaking and Steelmaking,1999,26(1):41-
|
| [9] |
N. Shigematsu and HIwai.Effect of CaO Added with SiO2 and/or Al2O3 on Reduction Rate of Dense Wustite by Hydrogen[J].Iron Steel Inst. Jpn. Int,1989,29(6):486-
|
| [9] |
N. Shigematsu and HIwai.Effect of CaO Added with SiO2 and/or Al2O3 on Reduction Rate of Dense Wustite by Hydrogen[J].Iron Steel Inst. Jpn. Int,1989,29(6):486-
|
| [10] |
HP. Pimenta and VSeshadri.Characterisation of Structure of Iron Ore Sinter and its Behavior during Reduction at Low Temperatures[J].Ironmaking and steelmaking,2002,29(3):169-
|
| [10] |
HP. Pimenta and VSeshadri.Characterisation of Structure of Iron Ore Sinter and its Behavior during Reduction at Low Temperatures[J].Ironmaking and steelmaking,2002,29(3):169-
|
| [11] |
T. Inami and KSuzuki.Effects of SiO2 and Al2O3 on the Lattice Parameter and CO Gas Reduction of CaO-containing Dense Wustite[J].Iron Steel Inst. Jpn. Int,2003,43(3):314-
|
| [11] |
T. Inami and KSuzuki.Effects of SiO2 and Al2O3 on the Lattice Parameter and CO Gas Reduction of CaO-containing Dense Wustite[J].Iron Steel Inst. Jpn. Int,2003,43(3):314-
|
| [12] |
K. Yamaguchi,HUeno,T. Kawaguchi,et al.Influence of Al2O3 on Reduction-Meltdown Behavior of Sinter in Blast Furnace[J].Iron Steel Inst. Jpn. Int,1994,34(12):964-
|
| [12] |
K. Yamaguchi,HUeno,T. Kawaguchi,et al.Influence of Al2O3 on Reduction-Meltdown Behavior of Sinter in Blast Furnace[J].Iron Steel Inst. Jpn. Int,1994,34(12):964-
|
| [13] |
E. T. Turkdogn .Physical chemistry of high temperature technology[M][J].Academic Press, New York,1980,:11-
|
| [13] |
E. T. Turkdogn .Physical chemistry of high temperature technology[M][J].Academic Press, New York,1980,:11-
|
| [14] |
A. A. El-Geassy,M. I. Nasr and M. M. Hessien.Effect of reducing gas on the 36 chaning during reduction of iron oxide compacts,36,640.[J].Iron Steel Inst. Jpn. Int,1996,36(6):640-
|
| [14] |
A. A. El-Geassy,M. I. Nasr and M. M. Hessien.Effect of reducing gas on the 36 chaning during reduction of iron oxide compacts,36,640.[J].Iron Steel Inst. Jpn. Int,1996,36(6):640-
|
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2013, Vol. 48 
