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| A review on hydrogen-enriched reduction in blast furnace |
| ZHU Guo-hai |
| Process and Engineering, Air Liquide (China) Research and Development Co., Ltd., Shanghai 201108, China |
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Abstract In order to explore the feasibility of hydrogen enrichment in blast furnace, the source and cost of hydrogen was presented firstly, then summarizes the impact of hydrogen-rich gas reduction on the operation of BF (the advantages and disadvantages of hydrogen reduction) from the theoretical and practical aspects, the reasonable selection of operating parameters of hydrogen-enriched BF such as raceway adiabatic flame temperature(RAFT), bosh gas total heat and chemical energy (TCE) and top gas temperature (TGT), the determination of the size of the BF raceway and the relationship between the raceway size and the BF permeability index and pressure drop were discussed. At the same time, the effect of increasing production and reducing coke by selecting different operating parameters for hydrogen-rich reduction was analyzed. Some issues to be studied in the hydrogen-rich BF, the effects of hydrogen enrichment on the use of BF off-gas, and the safety of hydrogen use were also introduced. The main contribution is to provide a comprehensive overview of the effects of hydrogen enrichment on BF operation and the selection of operating parameters. Moreover, the connection between the determination of the raceway size and the Ergun equation was clarified.
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Received: 04 December 2019
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2020, Vol. 55 
