ISSN 2594-357X
53nd Seminar on Ore Reduction and Raw Materials — Vol. 53, Num. 53 (2025)
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Abstract
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.
Keywords
Blast Furnace, Decarbonization, DRI
Blast Furnace, Decarbonization, DRI
How to cite
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: 53nd Seminar on Ore Reduction and Raw Materials,
São Paulo, Brasil,
2025.
ISSN: 2594-357X, DOI 10.5151/2594-357X-42186
