Abstract
Following the international climate change policy and the major use of coal-based blast furnace–basic oxygen furnace (BF–BOF) in the steel sector, with an average emission of 2.0 t CO2/t steel, alternative processing routes must be considered to reduce the emission intensities. An approach of progressive amalgamation with alternative gas and renewable energy-based processes is indicated for a coal-based sector. The approach also retains coal use for major production with technology changes like smelting reduction technology, HISARNA with carbon capture and storage, or top gas recycling blast furnace. Combining renewable energy-based ‘green electrolytic hydrogen’ processes with/without natural gas with existing coal-based processing is an important option in achieving global climate change targets for emission reduction. Capacity limitations of alternative processing routes and high green hydrogen costs are hurdles to overcome in progressive amalgamation. An approach to redesigning mixed circuits for minimizing sectoral emissions involving BF–BOF with available scrap is presented.
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Abbreviations
- 2DS:
-
Two-Degree centigrade Scenario
- 45Q:
-
Internal Revenue Code of a tax credit incentivizing carbon capture and sequestration or utilization in the USA.
- BAT:
-
Best Available Technology
- BAU:
-
Business As Usual
- CAGR:
-
Compounded Annual Growth Rate
- CCS:
-
Carbon Capture and Storage
- CCU:
-
Carbon Capture and Utilization
- CCUS:
-
Carbon capture Utilization and Storage
- DR:
-
Direct Reduction processes
- DRI:
-
Direct Reduced Iron
- DRI–EAF:
-
Direct Reduced Iron–Electric Arc Furnace process
- ENERGION ZR:
-
HYL Direct Reduction Shaft furnace Technology jointly developed by Tenova and Danieli
- EOR:
-
Enhanced Oil Recovery
- EUA:
-
European Union Allowances
- FINMET:
-
Fluidized bed iron ore reduction (VAI, Austria)
- FIOR:
-
Fluidized bed Iron Ore Reduction ESSO Research, USA
- FINEX:
-
A two-stage SR process incorporating fluid bed reduction and smelting
- HISARNA:
-
High-intensity iron making (SR process)
- HISMELT:
-
High-intensity smelting (SR process)
- HOGANAS:
-
Coal-based solid-state ironmaking process in tunnel kiln
- HYBRIT:
-
Hydrogen Breakthrough Ironmaking Technology
- HYL, MIDREX:
-
Direct reduction gas-based shaft furnace technologies
- IEAGHG:
-
International Energy Association Green House Gas Emission
- INMETCO:
-
International Metals Reclamation Company, Inc
- ITmk3:
-
Ironmaking Technology Marked three, third-generation ironmaking
- MDEA:
-
Methyl Di-Ethanol Amine
- MEA:
-
Mono-Ethanol Amine
- MTPA:
-
Million Tons Per Annum
- MXCOl:
-
Direct reduction with coal gasification
- NDC:
-
Nationally Determined Contributions
- PCI:
-
Pulverized Coal Injection
- RHF:
-
Rotary Hearth Furnace
- RK:
-
Rotary kiln
- SALCOS:
-
Salzgitter Low CO2 Steelmaking
- SR:
-
Smelting Reduction
- TGR-BF:
-
Top Gas Recycling Blast Furnace
- THM:
-
Metric Tons of Hot Metal
- TPA:
-
Metric tons per annum
- ULCOS:
-
Ultra-low CO2 Steelmaking
- WSA:
-
World Steel Association
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Sen, P.K., Roy, G.G. Climate Change and Emission Reduction Pathways for a Large Capacity Coal-Based Steel Sector: Implementation Issues. Trans Indian Inst Met 75, 2453–2464 (2022). https://doi.org/10.1007/s12666-022-02622-5
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DOI: https://doi.org/10.1007/s12666-022-02622-5