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Seminários de Redução, Minério de Ferro e Aglomeração


ISSN 2594-357X

Título

BLAST FURNACE DECARBONIZATION: COMPARING GAS INJECTION IN THE BF AND GAS USAGE FOR DRI PRODUCTION & CHARGING DRI IN THE BF

BLAST FURNACE DECARBONIZATION: COMPARING GAS INJECTION IN THE BF AND GAS USAGE FOR DRI PRODUCTION & CHARGING DRI IN THE BF

Autoria

DOI

10.5151/2594-357X-42186

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Resumo

Our steelmaking industry is challenged by decarbonization requirements and several companies are already converting to (DRP-)EAF steelmaking to reduce the CO2 emissions. We are assuming, however, that many BF-BOF’s will be retained coming decades at large capacity due to several intrinsic advantages and economics. This motivates us to contribute to decarbonization of BF-BOF steelmaking and advance effective technologies. This paper will compare the effect of two technologies i.e., 1) injection of gas in the BF and 2) usage of gas for the production of DRI and charging this DRI in the BF. It is concluded that the DRI option is more effective than injection of gas in the BF. The main reason for this is the Direct Reduction Plant gas recycling configuration which maximizes the gas utilization for metallurgical reduction. Our calculations also indicate that the usage of Coke Oven Gas is most effective for the production of DRI in reducing CO2 emissions considering realistic electricity grid carbon intensities.

 

OUR STEELMAKING INDUSTRY IS CHALLENGED BY DECARBONIZATION REQUIREMENTS AND SEVERAL COMPANIES ARE ALREADY CONVERTING TO (DRP-)EAF STEELMAKING TO REDUCE THE CO2 EMISSIONS. WE ARE ASSUMING, HOWEVER, THAT MANY BF-BOF’S WILL BE RETAINED COMING DECADES AT LARGE CAPACITY DUE TO SEVERAL INTRINSIC ADVANTAGES AND ECONOMICS. THIS MOTIVATES US TO CONTRIBUTE TO DECARBONIZATION OF BF-BOF STEELMAKING AND ADVANCE EFFECTIVE TECHNOLOGIES. THIS PAPER WILL COMPARE THE EFFECT OF TWO TECHNOLOGIES I.E., 1) INJECTION OF GAS IN THE BF AND 2) USAGE OF GAS FOR THE PRODUCTION OF DRI AND CHARGING THIS DRI IN THE BF. IT IS CONCLUDED THAT THE DRI OPTION IS MORE EFFECTIVE THAN INJECTION OF GAS IN THE BF. THE MAIN REASON FOR THIS IS THE DIRECT REDUCTION PLANT GAS RECYCLING CONFIGURATION WHICH MAXIMIZES THE GAS UTILIZATION FOR METALLURGICAL REDUCTION. OUR CALCULATIONS ALSO INDICATE THAT THE USAGE OF COKE OVEN GAS IS MOST EFFECTIVE FOR THE PRODUCTION OF DRI IN REDUCING CO2 EMISSIONS CONSIDERING REALISTIC ELECTRICITY GRID CARBON INTENSITIES.

Palavras-chave

Blast Furnace, Decarbonization, DRI

Blast Furnace, Decarbonization, DRI

Como citar

VERMA, DEEPAK; LAAR, REINOUD VAN; MURTA, ERIKA BENEVIDES DUTRA; SULTAN, HAIDER; WILLEMSEN, RICHARD. BLAST FURNACE DECARBONIZATION: COMPARING GAS INJECTION IN THE BF AND GAS USAGE FOR DRI PRODUCTION & CHARGING DRI IN THE BF, p. 325-332. In: 53º Seminário de Redução de Minérios e Matérias-Primas, São Paulo, Brasil, 2025.
ISSN: 2594-357X, DOI 10.5151/2594-357X-42186