Assessment of Blast Furnace Operational Constraints in the Presence of Hydrogen Injection
نویسندگان
چکیده
Present day, the production of hot metal (HM) via blast furnace route remains an integral part global steel industry. With pressure to curb greenhouse gas emissions, injection hydrogen is considered a promising solution while ironmaking transitions alternate technologies. A comprehensive heat and mass balance model calibrated operating was used assess operational limits through tuyeres, replacing Pulverised Coal Injection (PCI). Constrained by minimum top temperature Raceway Adiabatic Flame Temperature (RAFT), maximum rate determined be 19.5 kg-H2/t-HM when 37.4 kg-PCI/t-HM (i.e. replacement ratio 1.9 kg-PCI/kg-H2 or 1.54 kg-C/kg-H2). At rate, specific CO2,eq emissions were seen decrease 8% in gas. In case where increased level increases stack reduction efficiency, decreased, significantly. 14.3 with 4.5 achieved efficiency 100%, emission 14%. The optimal scenario for maintaining constant allowing RAFT decrease, PCI.
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ژورنال
عنوان ژورنال: Isij International
سال: 2022
ISSN: ['0915-1559', '1347-5460']
DOI: https://doi.org/10.2355/isijinternational.isijint-2021-574