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| Discrete element method study of solid descending and residence properties in COREX shaft furnace with center gas supply device |
| Heng Zhou1, Qin-fu Hou2, Ming-yin Kou1, Shun Yao1, Sheng-li Wu1 |
| 1 School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2 Department of Chemical Engineering, Monash University, Clayton, VIC 3800, Australia |
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Abstract Solid descending and residence properties in COREX shaft furnace with a center gas supply device (CGSD) were studied using the discrete element method. Solid flow pattern, residence time distribution, and local solid residence time (SRT) were analyzed. Moreover, the effects of the rotation speed of screws, the radius, and height of CGSD were investigated. The results show that the solid flow is dominantly a plug flow in the shaft furnace with the CGSD. In the upper region of the shaft furnace for gas–solid reduction, uniform distribution of local SRT is observed, which is preferable to match the even gas distribution expected due to the CGSD and slots. For different rotation speeds of the screws, the distribution of solid flow patterns is similar. The averaged residence time, dispersed plug volume fraction, and dead volume fraction decrease with increasing the rotation speed of the screws. The radius of the CGSD affects the solid residence in the shaft furnace. Local SRT above the CGSD increases with the increase in the radius of CGSD, possibly leading to the formation of more agglomerates. Hence, the radius of CGSD should be chosen carefully. The height of CGSD has a minor effect on solid residence in the shaft furnace.
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Received: 30 March 2018
Published: 29 July 2018
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| Cite this article: |
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Heng Zhou,Qin-fu Hou,Ming-yin Kou, et al. Discrete element method study of solid descending and residence properties in COREX shaft furnace with center gas supply device[J]. Journal of Iron and Steel Research International, 2019, 26(7): 669-678.
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| [1] |
Xing-sheng Zhang, Zong-shu Zou, Zhi-guo Luo. Numerical simulation on characteristics of COREX shaft furnace with central gas distribution[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2019, 26(6): 567-577. |
| [2] |
Zi-long Qiu,Zhi-guo Luo,*,Heng Zhou,Ren Chen,Feng Wang,Zong-shu Zou. Effect of screw casing structure on descending of burdens in COREX shaft furnace[J]. Chinese Journal of Iron and Steel, 2017, 24(1): 18-26. |
| [3] |
Hai-feng LI,Heng ZHOU,Tao ZHANG,Yang YOU,Zong-shu ZOU,Wan-ren XU. Influence of Screw Design on Burden Descending Velocity and Particle Segregation in COREX Shaft Furnace[J]. Chinese Journal of Iron and Steel, 2016, 23(6): 516-524. |
| [4] |
Li-hao HAN,Zhi-guo LUO,Heng ZHOU,Zong-shu ZOU,Yu-zhu ZHANG,. Influence of Cohesive Zone Shape on Solid Flow in COREX Melter Gasifier by Discrete Element Method[J]. Chinese Journal of Iron and Steel, 2015, 22(4): 304-310. |
| [5] |
Zhiguo LUO,,Heng ZHOU,,Tao ZHANG,,Yang YOU,,Haifeng LI,,Zongshu ZOU,. DEM Simulation of Solid Flow Including Asymmetric Phenomena in COREX Shaft Furnace[J]. Chinese Journal of Iron and Steel, 2015, 22(12): 1098-1106. |
| [6] |
LI Hai-feng,LUO Zhi-guo,ZOU Zong-shu,SUN Jun-jie,HAN Li-hao,DI Zhan-xia. Mathematical Simulation of Burden Distribution in COREX Melter Gasifier by Discrete Element Method[J]. Chinese Journal of Iron and Steel, 2012, 19(9): 36-42. |
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2019, Vol. 26 
