Investigation of the carbon monoxide post-combustion flame in the working space of a steelmaking unit

Authors

DOI:

https://doi.org/10.15587/1729-4061.2017.112072

Keywords:

thermophysical parameters, thermal-technological parameters, flame, carbon monoxide post-combustion, temperature field

Abstract

In order to optimize thermal mode of the steelmaking process and to bring down energy consumption, we examined effect of thermophysical parameters of the carbon monoxide post-combustion flame considering aerodynamic processes on the thermal-technological parameters during melting. Based on modern approaches and methods, we obtained data on the character of macro-physical processes that occur in the working space of the unit and in the reaction zone, taking into consideration the influence of aerodynamic processes in the bath of a steelmaking unit. We conducted a comparative analysis of the shape and temperature fields of the flame taking into consideration the influence of aerodynamic processes at different intensities of blowing the bath of a steelmaking unit with oxygen for different types of blowing devices.

It was established that the shape and magnitude of temperature fields of the drigted flame varies depending on the content of carbon (from 4 to 0.1 %) in the melt, the intensity of blowing the bath with oxygen (from 1,800 to 2,400 m3/h), as well as design features of the blowing device (nozzle diameter and inclination angle). In this case, lances with an increase in the inclination angle of the nozzles to 50° and varying nozzle diameters from 10 to 20 mm, compared to lances of basic design (at the same inclination angles), make it possible to improve flame organization, to increase the length and temperature of the flame, to improve uniformity of the structure of flame, to increase heat exchanging surface between the flame and the bath, and to improve heating capability of the bath in a steelmaking unit.

The studies reported in the present paper are applicable to industrial steelmaking units with the intensity of blowing the bath with oxygen in a range of 1,800‒2,400 m3/h. The results obtained bring us closer to the development of a rational design of the blowing device to optimize the thermal mode of steelmaking process that will make it possible to reduce energy consumption in steel production. 

Author Biographies

Irina Yakovleva, Zaporizhzhya State Engineering Academy Sobornuy аve., 226, Zaporizhzhya, Ukraine, 69006

Doctor of Technical Sciences, Professor

Department of Thermal Power Engineering

Aleksey Petrik, Zaporizhzhya State Engineering Academy Sobornuy аve., 226, Zaporizhzhya, Ukraine, 69006

Postgraduate student

Department of Thermal Power Engineering

References

  1. Mansurov, Q., Bakhtiyar, А. (2013). Activation of the Technological Combustion Process of Oxide Systems by Different Modifying Additives. Advances in Ceramic Science and Engineering, 2 (1), 106–112.
  2. Butorina, I. V., Harlashin, P. S., Havalic, Yu. V. (2015). Reduction of energy resources costs in steelmaking at metallurgical enterprises of Ukraine as a way of increasing the competitiveness of products. Bulletin of the Priazov State Technical University, 1 (30), 59–66.
  3. Luhtura, F. (2015). On the degree of afterburning of converter gases in the converters of the upper blast. Bulletin of the Priazov State Technical University, 1 (30), 111–121.
  4. Liu, F., Sun, D., Zhu, R., Zhao, F., Ke, J. (2016). Effect of nozzle twisted oxygen lance on flow field and dephosphorisation rate in converter steelmaking process. Ironmaking & Steelmaking, 44 (9), 640–648. doi: 10.1080/03019233.2016.1226562
  5. Li, Y., Lou, W. T., Zhu, M. Y. (2013). Numerical simulation of gas and liquid flow in steelmaking converter with top and bottom combined blowing. Ironmaking & Steelmaking, 40 (7), 505–514. doi: 10.1179/1743281212y.0000000059
  6. Zhong, L. C., Wang, X., Zhu, Y. X., Chen, B. Y., Huamg, B. C., Ke, J. X. (2010). Bath mixing behaviour in top–bottom–side blown converter. Ironmaking & Steelmaking, 37 (8), 578–582. doi: 10.1179/030192310x12700328925741
  7. Yakovleva, I., Petryk, O. (2016). Investigation of temperature fields of reaction zones when blowing a bath of a steelmaking aggregate with oxygen. Technical Physics and Industrial Thermal Power Engineering, 8, 193–199.
  8. Mazumdar, D., Evans, J. W. (2010). Modeling of steelmaking processes. CRS Press, Taylor and Francis Group, 463.
  9. Wei, G., Zhu, R., Dong, K., Ma, G., Cheng, T. (2016). Research and Analysis on the Physical and Chemical Properties of Molten Bath with Bottom-Blowing in EAF Steelmaking Process. Metallurgical and Materials Transactions B, 47 (5), 3066–3079. doi: 10.1007/s11663-016-0737-3
  10. Zhang, L., Ming-Gang, S., Shu-Mei, K. (2009). Hydraulic mоdel experiment of converter coherent jet oxygen lance. Proceedings of Asia Steel Busan, 1, 105–115.
  11. Singh, V., Kumar, J., Bhanu, C., Ajmani, S. K., Dash, S. K. (2007). Optimisation of the Bottom Tuyeres Configuration for the BOF Vessel Using Physical and Mathematical Modelling. ISIJ International, 47 (11), 1605–1612. doi: 10.2355/isijinternational.47.1605
  12. Protopopov, E. V., Chernyatevich, A. G., Feiler, S. V. (2015). Contribution of the chair of ferrous metallurgy to the development of the theory and technique of high-temperature modeling of converter bath blowing. Izvestiya. Ferrous Metallurgy, 58 (5), 299–308. doi: 10.17073/0368-0797-2015-5-299-308

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Published

2017-10-30

How to Cite

Yakovleva, I., & Petrik, A. (2017). Investigation of the carbon monoxide post-combustion flame in the working space of a steelmaking unit. Eastern-European Journal of Enterprise Technologies, 5(8 (89), 51–57. https://doi.org/10.15587/1729-4061.2017.112072

Issue

Vol. 5 No. 8 (89) (2017): ENERGY-SAVING TECHNOLOGIES AND EQUIPMENT

Section

Energy-saving technologies and equipment

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Copyright (c) 2017 Irina Yakovleva, Aleksey Petrik

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