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Steelmaking

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**History and Evolution of Steelmaking**
– Steelmaking has been crucial for the development of ancient, medieval, and modern societies.
– Early steelmaking processes originated in Ancient China, India, and Rome.
– The Bessemer process in the 19th century revolutionized mass production of steel.
– The Industrial Revolution saw the emergence of large-scale methods for steel production.
– Bethlehem Steel in Pennsylvania was a major global steel manufacturer until its closure in 2003.

**Modern Steelmaking Processes**
– Primary steelmaking involves converting pig iron into steel using methods like basic oxygen steelmaking and electric arc furnaces.
– Techniques such as the HIsarna process and electric arc furnace steelmaking have made steel production more energy-efficient.
– Secondary steelmaking includes operations like de-oxidation, vacuum degassing, and alloy addition.
– Ladle metallurgical operations are crucial for producing high-grade steel with specific tolerances.
– World steel production methods are categorized into primary, secondary, and tertiary steps.

**Environmental Impact and Emission Reduction**
– Steelmaking is responsible for around 11% of global CO2 emissions.
– Making 1 ton of steel emits about 1.8 tons of CO2.
– Steel contributes to approximately 7% of global greenhouse gas emissions.
– Mining and extraction processes for steel production lead to environmental damages.
– Various strategies like scrap-use in BF/BOF and H2 enrichment are being explored to reduce emissions.

**Innovative Steelmaking Technologies**
– The HIsarna process allows ironmaking without pre-processing steps, reducing emissions.
– Companies like Boston Metal and ArcelorMittal are involved in iron ore electrolysis.
– The Hybrit project and the SuSteel project are exploring new technologies for sustainable steel production.
– Research is ongoing in hydrogen plasma technology and green steel production methods.
– Top gas recovery blast furnace and hydrogen reduction in DRI/EAF show potential for emission reduction.

**Decarbonization Efforts and Industry Updates**
– CCS technologies, hydrogen usage, and scrap recycling are key to decarbonizing the steel sector.
– The steel industry is exploring electricity-based steelmaking for emission reduction.
– Ongoing developments in the industry include funding boosts for innovative projects and advancements in metal production.
– The industry is focused on transforming to more sustainable practices and reducing carbon footprint.
– Various reports, publications, and films provide insights into the evolution and future of steelmaking.https://en.wikipedia.org/wiki/Steelmaking

Related Articles:
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  • Glossary: Slag
  • Glossary: Steel
  • Glossary: Blast furnace

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