84
Z. Yu et al.
gas, and carbon gasification. The initial temperature of CCB self-reduction was
850 K, The main effective stage for BF energy-saving was stage 4.
(2) By decreasing the activation energy of coal gasification, the initial temperature
of CCB self-reduction became lower, the temperature range in its reaction for BF
energy-saving became wider, and its final carbon conversion was increased, indicating to improve the coal reactivity could intensify the effect of CCB reaction
for energy-saving.
(3) By increasing the activation energy of coal gasification, the initial temperature of
CCB self-reduction became higher, the temperature range in its reaction for BF
energy-saving became narrower, and its final carbon conversion was decreased,
indicating to reduce the coal reactivity could weaken the effect of CCB reaction
for BF energy-saving and increase the risk of clogging in the BF lower part.
Acknowledgements The authors thank the National Natural Science Foundation of China (No.
U1960205), and the State Key Laboratory of Advanced Metallurgy USTB for the financial support
of this work.
Nomenclature
Meanings of the symbols in this paper are the same as those in Ref. [6].
References
1. Kasai A, Toyota H, Nozawa K et al (2011) Reduction of reducing agent rate in blast furnace
operation by carbon composite iron ore hot briquette. ISIJ Int 51(8):1333–1335
2. Narita CYB, Mourao M, Takano C (2015) Development of composite briquettes of iron ore and
coal hardened by heat treatment. Ironmak Steelmak 42(7):548–552
3. Singh M, Björkman B (2007) Testing of cement bonded briquettes under laboratory and blast
furnace conditions Part 1—effect of processing parameters. Ironmak Steelmak 34(1):41–53
4. Kawanari M, Matsumoto A, Ashida R et al (2011) Enhancement of reduction rate of iron ore by
utilizing iron ore/carbon composite consisting of fine iron ore particles and highly thermoplastic
carbon material. ISIJ Int 51(8):1227–1233
5. Yokoyama H, Higuchi K, Ito T et al (2012) Decrease in carbon consumption of a commercial
blast furnace by using carbon composite iron ore. ISIJ Int 52(11):2000–2006
6. Tang HQ, Sun YJ, Rong T (2019) Experimental and numerical investigation of of carbon
composite briquette in blast furnace. Metals 10(1):49
7. Tang HQ, Rong T, Fan K (2019) Numerical investigation of applying high-carbon metallic
briquette in blast furnace. ISIJ Int 59(5):810–819
8. Gavel DJ (2017) A review on nut coke utilization in the blast furnaces. Mater Sci Tech 33(4):381–
387
Z. Yu et al.
gas, and carbon gasification. The initial temperature of CCB self-reduction was
850 K, The main effective stage for BF energy-saving was stage 4.
(2) By decreasing the activation energy of coal gasification, the initial temperature
of CCB self-reduction became lower, the temperature range in its reaction for BF
energy-saving became wider, and its final carbon conversion was increased, indicating to improve the coal reactivity could intensify the effect of CCB reaction
for energy-saving.
(3) By increasing the activation energy of coal gasification, the initial temperature of
CCB self-reduction became higher, the temperature range in its reaction for BF
energy-saving became narrower, and its final carbon conversion was decreased,
indicating to reduce the coal reactivity could weaken the effect of CCB reaction
for BF energy-saving and increase the risk of clogging in the BF lower part.
Acknowledgements The authors thank the National Natural Science Foundation of China (No.
U1960205), and the State Key Laboratory of Advanced Metallurgy USTB for the financial support
of this work.
Nomenclature
Meanings of the symbols in this paper are the same as those in Ref. [6].
References
1. Kasai A, Toyota H, Nozawa K et al (2011) Reduction of reducing agent rate in blast furnace
operation by carbon composite iron ore hot briquette. ISIJ Int 51(8):1333–1335
2. Narita CYB, Mourao M, Takano C (2015) Development of composite briquettes of iron ore and
coal hardened by heat treatment. Ironmak Steelmak 42(7):548–552
3. Singh M, Björkman B (2007) Testing of cement bonded briquettes under laboratory and blast
furnace conditions Part 1—effect of processing parameters. Ironmak Steelmak 34(1):41–53
4. Kawanari M, Matsumoto A, Ashida R et al (2011) Enhancement of reduction rate of iron ore by
utilizing iron ore/carbon composite consisting of fine iron ore particles and highly thermoplastic
carbon material. ISIJ Int 51(8):1227–1233
5. Yokoyama H, Higuchi K, Ito T et al (2012) Decrease in carbon consumption of a commercial
blast furnace by using carbon composite iron ore. ISIJ Int 52(11):2000–2006
6. Tang HQ, Sun YJ, Rong T (2019) Experimental and numerical investigation of of carbon
composite briquette in blast furnace. Metals 10(1):49
7. Tang HQ, Rong T, Fan K (2019) Numerical investigation of applying high-carbon metallic
briquette in blast furnace. ISIJ Int 59(5):810–819
8. Gavel DJ (2017) A review on nut coke utilization in the blast furnaces. Mater Sci Tech 33(4):381–
387