期刊
ISIJ INTERNATIONAL
卷 61, 期 1, 页码 174-181出版社
IRON STEEL INST JAPAN KEIDANREN KAIKAN
DOI: 10.2355/isijinternational.ISIJINT-2020-384
关键词
blast furnace; COREX export gas; tuyere injection; thermal compensation
资金
- National Natural Science Foundation of China [51904023, 51804027]
- Fundamental Research Funds for the Central Universities [FRF-TP-19-035A2]
- State Key Laboratory of Advanced Metallurgy [KF20-07]
- Australian Research Council [DP180101232]
The study focused on the impact of Blast furnace (BF) injection of COREX export gas after removal of CO2 (CEG) on the operation of the BF, as well as the acceptable injection volume of CEG under different thermal compensation measures.
Blast furnace (BF) injection of COREX export gas after removal of CO2 (CEG) displays many ecological and environmental advantages. A static model of BF operation of CEG was developed according to mass and heat balance. The effect of CEG injection on the raceway adiabatic flame temperature (RAFT), the amount and composition of bosh gas, and the shape of raceway were studied. The acceptable injection volume of CEG under different thermal compensation measures was investigated. The results show that under no thermal compensation, with the increase of CEG injection, the RAFT decreases but the volume of bosh gas increases. The content of CO and H-2 increases with the increase of CEG injection. Based on the standard of maintaining the RAFT and volume of bosh gas, addition of oxygen, reducing blast humidity and increasing blast temperature are effective measures of thermal compensation to increase the quantity of CEG injection. The characteristics of high temperature zone of BF under different suitable CEG injection volumes were also studied. The findings of this work can be used as a theoretical basis to guide plant operations for CEG injection in BF.
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