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VERSION:2.0
METHOD:PUBLISH
BEGIN:VEVENT
ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 02
SUMMARY:Development of a low-temperature sintering process for CO2 Reduction & H2-based operation of blast furnace
DESCRIPTION:CO2 gas is significantly generated from sinter plants and blast furnaces. It is necessary to reduce the fuel ratio in the sinter mix to decrease the CO2 emission from sinter plants, which will harmfully affect the melt formation and sinter quality consequently. To overcome the loss in the amount of melt, the current study aims to clarify the effect of adding iron ores-based calcium ferrites to the sinter mix on sinter quality and emission of CO2. The addition of calcium ferrites promoted a significant drop in sintering temperature while maintaining the porosity level. The presence of calcium ferrites led to the formation of finer pores, modifying the dominant pore size in the sinter from macro (>100µm) to medium/micropores (<100µm). The amount of SFCA and SFCA-I phases was significantly increased from 9% of the standard sinter to at least 32%. The aforementioned modifications were determinant to the improvement of the physical properties of the sinter, in terms of the degree of reduction and RDI, by at least 24 and 26%, respectively. Due to the decrease in the sintering temperature, the required fuel ratio is expected to decrease by more than 30%, and consequently, the identical reduction ratio has resulted in the emission of CO2. A low-temperature sintering process could be designed by adding calcium ferrites to the sinter mix. Considering the sinter products with a similar porosity level, the refinement of the size of the pores made by adding calcium ferrites might contribute to a better and homogenous percolation of hydrogen gas through the sinter during the reduction process inside the blast furnace, as the hydrogen molecule is known to have a smaller size than the CO molecule. Besides, through the improvement of sinter reducibility and strength, less coke would be required inside the blast furnaces.
CLASS:PUBLIC
DTSTART:20230614T153000
DTEND:20230614T155000
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