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Journals
Applied Mathematics and Nonlinear Sciences
Volume 7 (2022): Issue 2 (July 2022)
Open Access
Towards more efficient control of the ironmaking blast furnace: modelling gaseous reduction of iron ores in H
2
-N
2
atmosphere
Shuo Yao
Shuo Yao
,
Yuman Che
Yuman Che
and
Hamdy Mohamed
Hamdy Mohamed
| Aug 22, 2022
Applied Mathematics and Nonlinear Sciences
Volume 7 (2022): Issue 2 (July 2022)
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Published Online:
Aug 22, 2022
Page range:
1033 - 1042
Received:
Dec 13, 2021
Accepted:
May 15, 2022
DOI:
https://doi.org/10.2478/amns.2022.1.00010
Keywords
blast furnace
,
iron ore reduction
,
gas-solid reaction
,
unreacted shrinking-core model
,
multicomponent gas diffusion
© 2022 Shuo Yao et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.
Fig. 1
Schematic illustration of gaseous reduction based on a sphere object.
Fig. 2
Macro-kinetic parameters obtained by the two USCMs based on regression analysis.
Fig. 3
Comparison of experimental data and results estimated by USCM with DAB.
Fig. 4
Comparison of experimental data and results estimated by USCM with DABC.
Fig. 5
Variation of concentration difference of N2 along diffusion path with reduction degree under conditions of Exp. 2.
Fig. 6
Comparison of H2 concentration at reaction interface between different USCMs.
Fig. 7
Comparison of H2O concentration at reaction interface between different USCMs.
Fig. 8
Comparison of chemical driving force between different USCMs.
Fig. 9
Influence of N2 fraction in bulk stream on hydrogen reduction of iron ores.
Main parameters of experiments regarding hydrogen reduction of wüstite pellets [13].
Parameter
Value
Exp. 1
Exp. 2
Exp. 3
Y
A,s
, -
0.721
0.387
0.210
Y
C,s
, -
0.279
0.613
0.790
Y
B,s
, -
0
T
, K
1273
P
, Pa
101325
r
0
, mm
6.2
M
, mol/m
3
4.88 × 10
4
D
AB
, cm
2
/s
12.48 (at 1273 K)
D
AC
, cm
2
/s
11.43 (at 1273 K)
D
BC
, cm
2
/s
4.45 (at 1273 K)
K
, -
0.673 (at 1273 K)