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CFD‐DEM Study of Heat Transfer in the Reduction Shaft of Corex
Author(s) -
Hou Qinfu,
Li Jian,
Yu Aibing
Publication year - 2015
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.201400367
Subject(s) - computational fluid dynamics , heat transfer , reduction (mathematics) , discrete element method , work (physics) , nuclear engineering , thermal , materials science , mechanics , transient (computer programming) , process engineering , environmental science , thermodynamics , mechanical engineering , engineering , computer science , mathematics , physics , geometry , operating system
Corex has a great potential to produce hot metal economically and environmentally friendly. Reduction shaft (RS) for the direct reduction of iron ore is one of the two major reactors in Corex. This work uses a two‐dimensional slot model to investigate the thermal behavior of the gas–solid flow in the RS by a combined computational fluid dynamics and discrete element method approach.The general heat transfer characteristics are firstly examined. The complicated transient gas–solid and heat transfer phenomena are demonstrated in the RS process. Then, the effects of discharge rate and two common burden profiles are investigated qualitatively. The results show a linear relation between the steady state bed temperature and discharge rate, which could be helpful for the construction of a reliable scaled down discrete particle model of the RS. The difference between the temperature distributions for two burden profiles is illustrated, which indicates that the control of burden profile could be an effective method to improve energy efficiency. These findings should be useful for the control and optimization of the RS operation.