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- Title
NOx AND ULTRAFINE PARTICLE EMISSION CHARACTERISTICS IN A NEW STEEL SLAG MODIFICATION DEVICE.
- Authors
GUO, J. X.; ZHANG, L. L.; DAI, W. B.; QI, L. Y.; CANG, D. Q.
- Abstract
Two density-separated Chinese coals and steel slag were prepared and then combusted in a modification furnace with different excess air ratio. Non-staged and Fuel-staged combustion experiments were compared under different pulverized coal mixing ratios. Thus, in the fuel-staged combustion experiments, the concentration of NOx in the flue gas was found to greatly decrease under a bitumite: anthracite mixing ratio of 1:1 and an air excess coefficient of 1,2 under the fuel-staged ratio is 15:85. The flue gas temperature was as high as 1 615°C, while the NOx concentration in the flue gas was as low as 320 mg/m³. Compared with the other types of burners, the experimental combustion device designed herein efficiently reduced the NOx emissions ca. 80 %. Fuel-staged combustion has a significant effect on reducing particulate matter (PM) emissions, and a suitable coal ratio was also beneficial for reducing particulate matter emissions.
- Subjects
STEEL manufacture; FLUE gases; COMBUSTION gases; PARTICULATE matter; AIR pollutants
- Publication
Metalurgija, 2018, Vol 57, Issue 1/2, p47
- ISSN
0543-5846
- Publication type
Article