The ironmaking process is the main process with the largest CO emissions in the iron and steel industry, and the value of carbon content per unit calorific value (C) of blast furnace gas has an important impact on the accounting of CO emissions in the ironmak t/ GJ) given in Appendix B of GB/ T 32151.5-2015 is the toing process. The recommended C value of blast furnace gas (70.8 ×10tal carbon component C, not the combustion process C. Based on the measured data of the low-level calorific value and main component content of blast furnace gas in a steel mill, the measured C values of blast furnace gas under different component contents were calculated, and the changes of the measured parameters such as the measured low-level calorific value of blast furnace gas, the measuredvalue of the whole carbon component C, and the measured C value of the combustion process were analyzed. Combined with the currentsituation of the widespread application of the emission factor method, based on the fluctuation of the measured value of C, three methodsfor correcting the recommended value of C to C in the combustion process were proposed, such as I., II., III., etc. The deviation between the corrected value and the measured value is less than 5% under their respective applicable conditions. Finally, using the relevantstatistical data of the blast furnace ironmaking process of the steel mill in 2021, the calculation results of the carbon emissions of the blastfurnace body before and after the correction of the C recommended value of blast furnace gas were compared and analyzed, and the carbonemissions of the blast furnace body before the correction were -0.19 tons of CO for every tons of iron, and the carbon emissions of theblast furnace body after the correction were 0.415 tons of CO for every tons of iron , which was consistent with the real carbon emissions.

万迎峰(1971—),男,湖北武汉人,正高级工程师,硕士。E-mail:10757135@qq.com

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WAN Yingfeng,LI Qiujun,PAN Shuting,et al.Correction method of the recommended value of carbon content per unit calorific value of blast furnace gas based on measured data[J].Clean Coal Technology,2024,30(8):75-81.