Influence of Coal Reactivity on Carbon
Composite Briquette Reaction in Blast
Furnace
Zi Yu, Tao Rong, and Huiqing Tang
Abstract In this research, using the carbon composite briquette (CCB) containing
carbon: 20.30 wt%, Fe 3 O 4 : 29.70 wt%, FeO: 39.70 wt%, metallic iron: 1.57 wt%,
and gangue: 8.73 wt%. the reaction behavior of the CCB in BF and the influence
of coal reactivity was examined by the numerical investigation. Results showed that
the development of the CCB reaction in BF was divided into six stages. The initial
temperature of the CCB self-reduction was 850 K, the dominant temperature range
in CCB reaction being effective for BF energy-saving was from 1000 K to 1150 K, its
final reduction fraction, and final carbon conversion was 1.0 and 0.9, respectively. By
decreasing the activation energy of coal gasification, the initial temperature of CCB
self-reduction became lower, the effective temperature range of CCB reaction for
BF energy-saving was wider, and the final carbon conversion increased, indicating
to improve the coal reactivity in CCB could intensify the effect of its reaction on
BF energy-saving. By increasing the activation energy of coal gasification, the initial
temperature became higher, the effective temperature range of CCB reaction for BF
energy-saving was narrower, and the final carbon conversion decreased, reflecting
that to reduce coal reactivity in CCB could weaken the effect of its reaction on BF
energy-saving.
Keywords Carbon composite briquette · Coal reactivity · Reaction behavior ·
Blast furnace
Introduction
In the foreseeable future, the manufacturing route (blast furnace (BF) ironmakingbasic oxygen furnace (BOF) steelmaking) would continue to be the dominant route
for producing iron and steel all over the world. Although this process is wellestablished and highly efficient, it is facing challenges to reduce energy consumption
and CO 2 emission for more sustainable development. As the main sector in steel
Z. Yu · T. Rong · H. Tang (B)
State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, 30
Xueyuan Rd., Beijing 100083, China
e-mail: hqtang@ustb.edu.cn
© The Minerals, Metals & Materials Society 2021
A. A. Baba et al. (eds.), Energy Technology 2021, The Minerals, Metals
& Materials Series, https://doi.org/10.1007/978-3-030-65257-9_8
75
Composite Briquette Reaction in Blast
Furnace
Zi Yu, Tao Rong, and Huiqing Tang
Abstract In this research, using the carbon composite briquette (CCB) containing
carbon: 20.30 wt%, Fe 3 O 4 : 29.70 wt%, FeO: 39.70 wt%, metallic iron: 1.57 wt%,
and gangue: 8.73 wt%. the reaction behavior of the CCB in BF and the influence
of coal reactivity was examined by the numerical investigation. Results showed that
the development of the CCB reaction in BF was divided into six stages. The initial
temperature of the CCB self-reduction was 850 K, the dominant temperature range
in CCB reaction being effective for BF energy-saving was from 1000 K to 1150 K, its
final reduction fraction, and final carbon conversion was 1.0 and 0.9, respectively. By
decreasing the activation energy of coal gasification, the initial temperature of CCB
self-reduction became lower, the effective temperature range of CCB reaction for
BF energy-saving was wider, and the final carbon conversion increased, indicating
to improve the coal reactivity in CCB could intensify the effect of its reaction on
BF energy-saving. By increasing the activation energy of coal gasification, the initial
temperature became higher, the effective temperature range of CCB reaction for BF
energy-saving was narrower, and the final carbon conversion decreased, reflecting
that to reduce coal reactivity in CCB could weaken the effect of its reaction on BF
energy-saving.
Keywords Carbon composite briquette · Coal reactivity · Reaction behavior ·
Blast furnace
Introduction
In the foreseeable future, the manufacturing route (blast furnace (BF) ironmakingbasic oxygen furnace (BOF) steelmaking) would continue to be the dominant route
for producing iron and steel all over the world. Although this process is wellestablished and highly efficient, it is facing challenges to reduce energy consumption
and CO 2 emission for more sustainable development. As the main sector in steel
Z. Yu · T. Rong · H. Tang (B)
State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, 30
Xueyuan Rd., Beijing 100083, China
e-mail: hqtang@ustb.edu.cn
© The Minerals, Metals & Materials Society 2021
A. A. Baba et al. (eds.), Energy Technology 2021, The Minerals, Metals
& Materials Series, https://doi.org/10.1007/978-3-030-65257-9_8
75