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Influence of Cohesive Zone Thickness on Gas Flow in Blast Furnace Analyzed by DEM ‐ CFD Model Considering Low Coke Operation
Author(s) -
Kon Tatsuya,
Natsui Shungo,
Matsuhashi Shohei,
Ueda Shigeru,
Inoue Ryo,
Ariyama Tatsuro
Publication year - 2013
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.201300025
Subject(s) - coke , blast furnace , permeability (electromagnetism) , materials science , computational fluid dynamics , volumetric flow rate , petroleum engineering , composite material , metallurgy , mechanics , geology , chemistry , physics , biochemistry , membrane
Reduction of the reducing agent aiming at the mitigation of carbon dioxide emissions decreases the gas permeability in blast furnace. Favorable control of burden distribution and optimization of packed bed might mitigate decreasing permeability. Especially, decreasing thickness of cohesive zone would be effective. In present study, the influence of the cohesive zone thickness on gas flow and pressure distribution was investigated using the DEM‐CFD model to evaluate the effects of adoption of a thin‐layered cohesive layer structure on gas flow and permeability changes in the cohesive zone during low coke ratio operation. Reducing the thickness of the cohesive zone can effectively increase permeability in the cohesive zone even in the thin coke slit of the low coke rate operation, and improvement in the permeability of the cohesive zone can be realized more effectively in combination with appropriate coke mixed charging.