Abstract
A new process called ‘NO x reduction by coupling combustion with recycling flue gas (RCCRF)’ was proposed to decrease NO x emission during the iron ore sintering process. The simulation test of NO x reduction was performed over sintered ore and in the process of coke combustion. Experimentally, NO x reduction was also carried out by sintering pot test. For sintered ore, the amount of NO x emission is reduced by 15wt%–25wt% at 400–550°C using 2.0vol% H2 or 2.0vol% CO, or reduced by 10wt%–30wt% at 560–720°C using 0.15vol% NH3. NO x reduction is around 10wt% by coupling combustion of pyrolysis gas and coke, or around 16wt% by recycling flue gas into coke combustion. By RCCRF, the maximum NO x reduction ratio is about 23wt% in coke combustion experiment and over 40wt% in sintering pot test.
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This work was financially supported by the National Natural Science Foundation of China (No.50574085).
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Chen, Yg., Guo, Zc. & Feng, Gs. NO x reduction by coupling combustion with recycling flue gas in iron ore sintering process. Int J Miner Metall Mater 18, 390–396 (2011). https://doi.org/10.1007/s12613-011-0452-7
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DOI: https://doi.org/10.1007/s12613-011-0452-7