Título

OPORTUNITIES TO REDUCE UP TO 50% CO2 EMISSIONS IN INTEGRATED MILLS

OPORTUNITIES TO REDUCE UP TO 50% CO2 EMISSIONS IN INTEGRATED MILLS

Autoria

BRAGA, DAVI SILVA; SAMPAIO, RONALDO SANTOS

BRAGA, DAVI SILVA

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SAMPAIO, RONALDO SANTOS

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DOI

10.5151/2594-357X-41581

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Resumo

THE SOURCE OF THE PROBLEM IS WHERE THE BEST SOLUTION WILL COME FROM. THE PRINCIPLE OF CIRCULARITY STATES THAT ALL WASTE NEEDS TO FIND A SUSTAINABLE SOLUTION AND MANY OTHER PREDICATES. CO2 EQUIVALENT EMISSIONS WILL BE REDUCED BY INCREASING THE EFFICIENCY OF COKE-INTEGRATED STEELMAKING, INCREASING THE IRON CONTENT IN ORES AND REPLACING FOSSIL CARBON WITH RENEWABLE CARBON IN SINTERING AND INJECTION INTO AF. CO2 REDUCTION CAN EXCEED 50% WITHOUT NEW TECHNOLOGIES. SEVEN EXAMPLES OF HOW TO REDUCE EMISSIONS IN THE INTEGRATED PLANT WITH MINIMAL CAPITAL AND WITH PRODUCTIVITY GAINS IN THE BLAST FURNACE AND BOF, LESS SULFUR IN THE PIG IRON, LESS CARBONATES AND MUCH LESS AF SLAG. THE RICHER IRON SINTER FEED (+3.2%) AND THE GREATER USE OF SCRAP IN THE BOF CONVERTER (13.8 TO 19.8%) REDUCE EMISSIONS BY 13%. USING CHARCOAL IN THE AGGLOMERATION AND INJECTION OF PULVERIZED CHARCOAL REDUCES CO2 BY 37.8%. COMBINING IRON ENRICHMENT WITH PARTIAL REPLACEMENT OF THE FOSSIL (IN SINTERING AND PCI) THIS CO2 REDUCTION REACHES 49.1%. ALL THIS WITH A REDUCTION IN THE USE OF LIMESTONE AND LIME AND LOWER SULFUR CONTENT IN THE PIG IRON AND LOWER EMISSIONS OF SOX, NOX, AND OTHERS.

THE SOURCE OF THE PROBLEM IS WHERE THE BEST SOLUTION WILL COME FROM. THE PRINCIPLE OF CIRCULARITY STATES THAT ALL WASTE NEEDS TO FIND A SUSTAINABLE SOLUTION AND MANY OTHER PREDICATES. CO2 EQUIVALENT EMISSIONS WILL BE REDUCED BY INCREASING THE EFFICIENCY OF COKE-INTEGRATED STEELMAKING, INCREASING THE IRON CONTENT IN ORES AND REPLACING FOSSIL CARBON WITH RENEWABLE CARBON IN SINTERING AND INJECTION INTO AF. CO2 REDUCTION CAN EXCEED 50% WITHOUT NEW TECHNOLOGIES. SEVEN EXAMPLES OF HOW TO REDUCE EMISSIONS IN THE INTEGRATED PLANT WITH MINIMAL CAPITAL AND WITH PRODUCTIVITY GAINS IN THE BLAST FURNACE AND BOF, LESS SULFUR IN THE PIG IRON, LESS CARBONATES AND MUCH LESS AF SLAG. THE RICHER IRON SINTER FEED (+3.2%) AND THE GREATER USE OF SCRAP IN THE BOF CONVERTER (13.8 TO 19.8%) REDUCE EMISSIONS BY 13%. USING CHARCOAL IN THE AGGLOMERATION AND INJECTION OF PULVERIZED CHARCOAL REDUCES CO2 BY 37.8%. COMBINING IRON ENRICHMENT WITH PARTIAL REPLACEMENT OF THE FOSSIL (IN SINTERING AND PCI) THIS CO2 REDUCTION REACHES 49.1%. ALL THIS WITH A REDUCTION IN THE USE OF LIMESTONE AND LIME AND LOWER SULFUR CONTENT IN THE PIG IRON AND LOWER EMISSIONS OF SOX, NOX, AND OTHERS.

Palavras-chave

Iron; Sinter Feed; CO2; Carbonates; Charcoal

Iron; Sinter Feed; CO2; Carbonates; Charcoal.