In consideration of the environmental degradation and global scarcity of coking coal resource, substituting coke with coal and improving the gas utilization are the developing trends of ironmaking technology. Oxygen blast furnace, an ironmaking technology with top gas recycling, is most likely to be used in large-scale industrial manufacture considering its advantages of high productivity, high pulverized coal injection rate, low coke rate, high top gas calorific value, etc. The purpose of this paper is to make a little contribution to this technology on burden descending behavior in the metallurgical process. The results would provide reference for the design and operation of oxygen blast furnace. In the complex metallurgical processes with countercurrent multi-phase reactions, solid material motion plays important roles in the process since it determines the path and the residence time of the solid reactants as well as the stress distribution. The continuum model is often employed in the kinetic process analysis for its simplicity and low computational load. In this study, a viscous flow model based on the Navier-Stokes equation was developed to investigate the behavior of solid flow in oxygen blast furnace. A three dimensional experimental apparatus was constructed to observe burden descending behavior. According to concerned experimental results, it show that the interaction between the burden and the wall is not significant in shaft zone of the furnace. The descending burden maintains initial pattern until it reaches the lower part where the size of the cross section starts to reduce and the strong friction appears obviously in the tracked materials. Consequently, slip boundary condition with the Fanning equation was used for computations to describe the friction between solid flow and the wall or the dead zone. In addition, the position and the gas flow rate of the upper tuyeres were investigated. It was demonstrated that if the upper tuyeres are higher than the top of the belly, the position will strongly influence the solid flow distribution. Thus, gas velocity must be limited in a proper range to keep the solid flow falling down smoothly. By analysis of various solid viscosities, it is shown that solid flow patterns are not sensitive to solid viscosity within certain range.
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ASME 2013 Fluids Engineering Division Summer Meeting
July 7–11, 2013
Incline Village, Nevada, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-5554-6
PROCEEDINGS PAPER
Numerical Simulation of Burden Descending Behavior in Oxygen Blast Furnace Available to Purchase
Peng Jin,
Peng Jin
University of Science and Technology Beijing, Beijing, China
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Zeyi Jiang,
Zeyi Jiang
University of Science and Technology Beijing, Beijing, China
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Dianyu E,
Dianyu E
University of Science and Technology Beijing, Beijing, China
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Chaochao Wang,
Chaochao Wang
University of Science and Technology Beijing, Beijing, China
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Xinxin Zhang
Xinxin Zhang
University of Science and Technology Beijing, Beijing, China
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Peng Jin
University of Science and Technology Beijing, Beijing, China
Zeyi Jiang
University of Science and Technology Beijing, Beijing, China
Dianyu E
University of Science and Technology Beijing, Beijing, China
Chaochao Wang
University of Science and Technology Beijing, Beijing, China
Xinxin Zhang
University of Science and Technology Beijing, Beijing, China
Paper No:
FEDSM2013-16574, V01AT03A024; 5 pages
Published Online:
December 13, 2013
Citation
Jin, P, Jiang, Z, E, D, Wang, C, & Zhang, X. "Numerical Simulation of Burden Descending Behavior in Oxygen Blast Furnace." Proceedings of the ASME 2013 Fluids Engineering Division Summer Meeting. Volume 1A, Symposia: Advances in Fluids Engineering Education; Advances in Numerical Modeling for Turbomachinery Flow Optimization; Applications in CFD; Bio-Inspired Fluid Mechanics; CFD Verification and Validation; Development and Applications of Immersed Boundary Methods; DNS, LES, and Hybrid RANS/LES Methods. Incline Village, Nevada, USA. July 7–11, 2013. V01AT03A024. ASME. https://doi.org/10.1115/FEDSM2013-16574
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