ABSTRACT
The 2-D numerical simulation of the particle motion and combustion behavior in the raceway has been done to analyze the gas-flow field, pressure field, temperature field, distribution of gas composition, as well as the effect of coke mass-flow rate, and blowing gas temperature on the maximum temperature in the raceway zone. The results show that the temperature in the cavity reaches the maximum in the upper part of the cavity region, and the maximum value is above 3000 K. During the combustion process, the concentration of O2 decreases, and the concentration of CO increases. The highest CO content in the gas leaving the raceway zone and entering the coke bed is about 0.95, while the lowest O2 content is 0.05.
KEYWORDS
PAPER SUBMITTED: 2020-05-21
PAPER REVISED: 2020-07-01
PAPER ACCEPTED: 2020-07-09
PUBLISHED ONLINE: 2020-09-12
THERMAL SCIENCE YEAR
2021, VOLUME
25, ISSUE
Issue 2, PAGES [879 - 889]
- Anameric, B., et al., Direct Iron Smelting Reduction Processes, Minerals Processing and Extractive Metallurgy Review, 30 (2008), 1, pp. 1-51
- Qu, Y. X., et al., A Comprehensive Static Model for COREX Process, ISIJ International, 52 (2012), 12, pp. 2186-2193
- Zhou, H., et al., Discrete Particle Simulation of Solid Flow in a Large-Scale Reduction Shaft Furnace with Center Gas Supply Device, ISIJ International, 58 (2018), 3, pp. 422-430
- Kumar, P. P., et al., Operating Experiences with Corex and Blast Furnace at JSW Steel Ltd., Ironmaking and Steelmaking, 35 (2008), 4, pp. 260-263
- Zhou, H., et al., Analysis of Coke Oven Gas Injection from Dome in COREX Melter Gasifier for Adjusting Dome Temperature, Metals, 8 (2018), 11, 921
- Di, Z. X., et al., Fractal Study on Raceway Boundary, Journal of Iron and Steel Research International, 18 (2011), 5, pp. 16-19
- Gupta, G. S., et al., Comparison of Blast Furnace Raceway Size with Theory, ISIJ International, 46 (2006), 2, pp. 195-201
- Guo, S. Y., Study on Simulation of BF Raceway by CFX Software, Shandong Metallurgy, 30 (2008), 1, pp. 56-57
- Qiu, J. H., Numerical Simulation of Pulverized Coal Combustion in BF Raceway Injected by Oxy-Coal Burner, Journal of Iron and Steel Research, 8 (1995), 1, pp. 1-5
- Zhang, L. L., et al., The 3-D Modelling of Pulverized Coal Combustion Process in the Raceway of Blast Furnace, Journal of Qingdao University (Engineering Technology Edition), 20 (2005), 4, pp. 44-48
- Zhang, Y. P., et al., Numerical Simulation of Pulverized Coal Combustion Two-Phase Flow, Journal of Xi'an University of Science and Technology, 28 (2008), 2, pp. 297-299
- Gu, M. Y., Numerical Simulation and Application of Aerodynamic Characteristics and Combustion Process of Pulverized Coal Combustion, Ph. D. thesis, Shanghai Jiaotong University, Shanghai, China, 2008
- Huang, D. F., et al., A Comprehensive Simulation of the Raceway Formation and Combustions, AISTech 2009 Proceedings, I (2009), pp. 333-344
- Shen, Y. S., et al., Modelling of Injecting a Ternary Coal Blend into a Model Ironmaking Blast Furnace, Minerals Engineering, 90 (2016), May, pp. 89-95
- Shen, Y. S., et al., Model Study of the Effect of Bird's Nest on Transport Phenomena in the Raceway of an Ironmaking Blast Furnace, Minerals Engineering, 63 (2014), Aug., pp. 91-99
- Hou, Q. F., et al., Discrete Particle Modelling of Lateral Jets into a Packed Bed and Micromechanical Analysis of the Stability of Raceways, AIChE, 62 (2016), 12, pp. 4240-4250
- Hilton, J. E., et al., Raceway Formation in Laterally Gas-driven Particle Beds, Chemical Engineering Science, 80 (2012), 10, pp. 306-316
- Sun, J. J., et al., Numerical Simulation of Raceway Phenomena in a COREX Melter Gasifier, Powder Technology, 281 (2015), Sept., pp. 159-166
- Wei, G. C., et al., The CFD-DEM Study on Heat Transfer Characteristics and Microstructure of the Blast Furnace Raceway with Ellipsoidal Particles, Powder Technology, 346 (2019), Mar., pp. 350-362
- Miao, Z., et al., The CFD-DEM Simulation of Raceway Formation in an Ironmaking Blast Furnace, Powder Technology, 314 (2017), June, pp. 542-549
