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Fundamental study on iron ore sintering new process of flue gas recirculation together with using biochar as fuel

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Abstract

It is of great significance for cleaner production to substitute bio-energy for fossil fuels in iron ore sintering. However, with the replacement ratio increasing, the consistency of heat front and flame front is broken, and the thermal utilizing efficiency of fuel is reduced, which results in the decrease of yield and tumble index of sinter. Circulating flue gas to sintering bed as biochar replacing 40% coke, CO in flue gas can be reused so as to increase the thermal utilizing efficiency of fuels, and the consistency of two fronts is recovered for the circulating flue gas containing certain CO2, H2O and lower O2, which contributes to increasing the maximum temperature, extending the high temperature duration time of sintering bed, and results in improving the output and quality of sinter. In the condition of circulating 40% flue gas, the sintering with biomass fuels is strengthened, and the sintering indexes with biomass fuel replacing 40% coke breeze are comparative to those of using coke breeze completely.

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Authors and Affiliations

  1. School of Minerals Process and Bioengineering, Central South University, Changsha, 410083, China

    Min Gan  (甘敏), **ao-hui Fan  (范晓慧), Tao Jiang  (姜涛), Xu-ling Chen  (陈许玲), Zhi-yuan Yu  (余志元) & Zhi-yun Ji  (季志云)

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  1. Min Gan  (甘敏)
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  2. **ao-hui Fan  (范晓慧)
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  3. Tao Jiang  (姜涛)
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  4. Xu-ling Chen  (陈许玲)
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  5. Zhi-yuan Yu  (余志元)
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  6. Zhi-yun Ji  (季志云)
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Corresponding author

Correspondence to **ao-hui Fan  (范晓慧).

Additional information

Foundation item: Projects(51174253, 51304245) supported by National Natural Science Foundation of China

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Gan, M., Fan, Xh., Jiang, T. et al. Fundamental study on iron ore sintering new process of flue gas recirculation together with using biochar as fuel. J. Cent. South Univ. 21, 4109–4114 (2014). https://doi.org/10.1007/s11771-014-2405-6

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  • DOI: https://doi.org/10.1007/s11771-014-2405-6

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