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Emission during the firing of chrome-magnesite products in tunnel kilns

  • Atmospheric Conservation
  • Published:
Refractories Aims and scope

Conclusions

When chrome-magnesite products are fired in tunnel furnaces, the concentration in the effluent gas of dust is 110–150; of Cr2O3, 5–7; NOx, 20–35; CO, 100–125; SO2, 25–40; and SO3, 30–70 mg/m3. The emission dust is finely dispersed. The average size of the particles of dust is 0.3, the minimum 0.05, and the maximum 1 μm. There is no hydrogen sulfide, NO2, or CrO3 in the emission.

Dust and nitrogen oxides are formed in the firing zone of the kiln. The formation of dust and NO2 depends on the air-consumption coefficient.

The use of the pipe-in-pipe type of ports does not provide good gas combustion. To improve the operation of the kiln and the combustion of the natural gas it is recommended that instead of the obsolescent tube-in-tube ports, the ports developed by the Eastern Institute of Refractories be installed since they have given good results in tests [7].

To improve the scattering effect of the removal of dust in the existing equipment it is recommended that the height of the flue stacks be increased to 40–50 m.

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Authors and Affiliations

  1. All Union Scientific-Research and Planning Institute of Ferrous Metallurgy and Energy Purification, Ministry of the Ferrous Metal Industry of the USSR, USSR

    Yu. V. Krechin, S. V. Telegin, N. M. Ivanov, A. M. Kasimov, E. P. Plichko, Yu. M. Sverkov & B. N. Maksimov

Authors
  1. Yu. V. Krechin
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  2. S. V. Telegin
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  3. N. M. Ivanov
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  4. A. M. Kasimov
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  5. E. P. Plichko
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  6. Yu. M. Sverkov
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  7. B. N. Maksimov
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Additional information

Translated from Ogneupory, No. 4, pp. 36–41, April, 1986.

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Krechin, Y.V., Telegin, S.V., Ivanov, N.M. et al. Emission during the firing of chrome-magnesite products in tunnel kilns. Refractories 27, 226–231 (1986). https://doi.org/10.1007/BF01387553

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  • DOI: https://doi.org/10.1007/BF01387553

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