Experimental Research on Reducing the Dust of BOF in CO2 and O2 Mixed Blowing Steelmaking Process
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概要
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The thermodynamic theory and experimental research on reducing the dust generation in CO2 and O2 Mixed Blowing (COMB) steelmaking process have been undertaken. In labo-scale experiment, data show that the amounts of dust and iron loss keep on decreasing as CO2 blowing rate increases. Further, dust sampled from 30 t BOF conventional process in Fujian Sanming Iron and Steel Plant has been analyzed, and the dust generation rate in the conventional process reduced from 666 g/s at the 1.5 min point to 215 g/s at the end of blowing. Introducing the technology of the stepped CO2 blow, the average generation rate of dust is reduced by 12.5% in this experiment compared with the conventional one, while the average generation rate of T-Fe in dust is reduced by 12.7%. This improvement has been made keeping the same decarburization rates. Therefore the stepped CO2 blowing rate has remarkable effect on dust generation. This research has proved that COMB steelmaking process is effective on a decrease in dust generation along with improved iron yield.
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