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| Ore-blending optimization for Canadian iron concentrate during iron ore sintering based on high-temperature characteristics of fines and nuclei |
| Sheng-li Wu1, Xiao-bo Zhai1, Li-xin Su1, Xu-dong Ma1 |
| 1 School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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Abstract Canadian iron concentrate (CIC) can elevate the ferrous grade and lower the contents of gangue components and harmful elements in the sinter. To understand high-temperature characteristics of CIC and typical iron ore, the formation of the melt was calculated mainly through FactSage 7.2, and melt fluidity (MF) test for iron ore fines and penetration characteristic test of CIC melt into iron ore nuclei were carried out via micro-sintering method. The results show that hematite, calcium ferrites, dicalcium silicate, and magnetite take part in the formation of the melt in N2. The formation temperature of the liquid for CIC is higher than that for hematite/limonite ore. The MF of CIC is lower than that of hematite/limonite ore fines. The MF of hematite/limonite ore fines is dominated by the liquid amount and melt viscosity. The penetration depth (PD) of CIC melt into limonite ore nuclei is smaller than that into hematite ore nuclei. The PD is related to the reaction ability of the nuclei with the melt. Based on above results, sinter pot tests were conducted. The result shows that in the base ore blends including two hematite ores and two limonite ores, adding CIC deteriorates the sintering indexes. Increasing the proportion of high-MF and small-PD hematite ore can significantly improve the sintering indexes. 10 mass% is a suit-able proportion for adding CIC in ore blends.
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| Cite this article: |
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Sheng-li Wu,Xiao-bo Zhai,Li-xin Su, et al. Ore-blending optimization for Canadian iron concentrate during iron ore sintering based on high-temperature characteristics of fines and nuclei[J]. Journal of Iron and Steel Research International, 2020, 27(7): 755-769.
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| [1] |
Xiao-hui Fan, Yan-nan Wang, Min Gan, Zhi-yun Ji, Yang Zhou, Xu-ling Chen. Thermodynamic analysis and reaction behaviors of alkali metal elements during iron ore sintering[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2019, 26(6): 558-566. |
| [2] |
Hong-ming Long, ? Qi Shi ? Hong-liang Zhang ? Ru-fei Wei ? Tie-jun Chun ? Jia-xin Li. Application status and comparison of dioxin removal technologies for iron ore sintering process[J]. , 2018, 25(4): 357-365. |
| [3] |
Zhi-yuan Yu,,*,Xiao-hui Fan,Min Gan,Xu-ling Chen. Effect of Ca-Fe oxides additives on NOx reduction in iron ore sintering[J]. , 2017, 24(12): 1184-1189. |
| [4] |
Li-shun YUAN,Xiao-hui FAN,Min GAN,Gui-ming YANG,Yi WANG. Structure Model of Granules for Sintering Mixtures[J]. Chinese Journal of Iron and Steel, 2014, 21(10): 905-909. |
| [5] |
F Farshidfar,M Ghassemi Kakroudi. Effect of Chromite-Silica Sands Characteristics on Performance of Ladle Filler Sands for Continuous Casting[J]. Chinese Journal of Iron and Steel, 2012, 19(3): 11-13. |
| [6] |
ZHANG Jun,GUO Xing-min,HUANG Xue-jun. Effects of Temperature and Atmosphere on Sintering Process of Iron Ores[J]. Chinese Journal of Iron and Steel, 2012, 19(10): 1-6. |
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2020, Vol. 27 
