|
|
|
| Determination method of high-temperature characteristics of iron-ore sintering based on n(Fe2O3)/n(CaO) |
| Zheng-wei Yu1, Li-xin Qian1, Hong-ming Long1,2, Yi-fan Wang1, Qing-min Meng1, Tie-jun Chun1 |
| 1 School of Metallurgical Engineering, Anhui University of Technology, Ma’anshan 243002, Anhui, China
2 Key Laboratory of Metallurgical Emission Reduction and Resources Recycling (Anhui University of Technology), Ministry of Education, Ma’anshan 243002, Anhui, China |
|
|
|
|
Abstract The high-temperature characteristics of iron ores play important roles in optimizing ore proportion of sintering, which are tested by using iron-ore fines and analytical reagent CaO as raw materials. Two calculation methods of CaO addition amount based on binary basicity (basicity method) and n(Fe2O3)/n(CaO) (mole ratio method), respectively, were employed to evaluate the liquid phase fluidity (LPF) and the capability of calcium ferrite formation (CCFF) of iron ores. The results show that the rule of LPF of iron ores under the mole ratio method is different from that with basicity method. The LPF measured by basicity method has a linear positive correlation with the SiO2 content, and there is no linear relationship between LPF and Al2O3 content or mass loss on ignition, which are inconsistent with the results of the previous study. And the results of CCFF with low SiO2 content (< 3 wt.%) or high SiO2 content (> 7 wt.%) based on basicity method cannot reflect the true CCFF. The mole ratio method could successfully solve this problem by reducing the effect of CaO addition amount changes caused by SiO2 content of iron ores.
|
|
Received: 29 August 2018
Published: 25 December 2019
|
|
|
|
| Cite this article: |
|
Zheng-wei Yu,Li-xin Qian,Hong-ming Long, et al. Determination method of high-temperature characteristics of iron-ore sintering based on n(Fe2O3)/n(CaO)[J]. Journal of Iron and Steel Research International, 2019, 26(12): 1257-1264.
|
|
|
|
| [1] |
Tian-xiong Wang, Cheng-yi Ding, Xue-wei Lv, Sen-wei Xuan, Gang Li. Reduction kinetics of MgO-doped calcium ferrites under CO–N2 atmosphere[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2019, 26(12): 1265-1272. |
| [2] |
LUO Guo-ping,,WU Sheng-li,ZHANG Guang-jie,WANG Yi-ci,. Effects of Compound Silicate Gangue on Formation of Complex Calcium Ferrite During Sintering Process[J]. Chinese Journal of Iron and Steel, 2013, 20(3): 18-23. |
| [3] |
WANG Yi-ci,,ZHANG Jian-liang,ZHANG Fang,,LUO Guo-ping,. Formation Characteristics of Calcium Ferrite in Low Silicon Sinter[J]. Chinese Journal of Iron and Steel, 2011, 18(10): 1-7. |
|
|
|
|
2019, Vol. 26 
