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Mathematical Model Study of the Process Kinetics during Roasting of Iron Ore Pellets

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Abstract

A mathematical model of the kinetics of the redox reactions in a layer of iron ore pellets is developed. The kinetic equations relating the completeness of the redox reactions to the heat treatment time and temperature and to the gas phase composition are the major component of the mathematical model. The model is applied to determine the optimum conditions of roasting pellets in OK-228 conveyor machines. An algorithm is developed to calculate the degree of oxidation of iron monoxide in the pellets situated at any point of the roasted layer. These parameters characterize the metallurgical properties of the pellets both in the initial state and upon reduction in a blast furnace. The methods for calculating the kinetic parameters used for the mathematical processing of the experimental data obtained on studying titanomagnetite oxidation and hematite dissociation on roasting of the Kachkanar pellets are considered. A rather high convergence of the calculated and experimental data is found: the error does not exceed 10–15%.

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REFERENCES

  1. B. P. Yur’ev and N. A. Spirin, “Oxidation of iron-ore pellets,” Steel in Translation 41, 400–403 (2011).

    Article  Google Scholar 

  2. R.-Q. Liang, S. Yang, F.-S. Yan, and J.-C. He, “Kinetics of oxidation reaction for magnetite pellets,” J. Iron Steel Res. Intern. 20 (9), 16–20 (2013).

    Article  CAS  Google Scholar 

  3. T. Ya. Malysheva, Yu. S. Yusfin, and S. V. Plotnikov, “Technological aspects of manufacturing pellets from magnetite ores,” Izv. Vyssh. Uchebn. Zaved., Chern. Metall., No. 9, 3–5 (2011).

  4. Q. Hu, D. Yao, Y. Xie, Y. Zhu, H. Yang, Y. Chen, and H. Chen, “Study on intrinsic reaction behavior and kinetics during reduction of iron ore pellets by utilization of biochar,” Energy Convers. Manage. 158, 1–8 (2018).

    Article  CAS  Google Scholar 

  5. S. P. E. Forsmo, S.-E. Forsmo, P.-O. Samskog, and B. M. T. Björkman, “Mechanisms in oxidation and sintering of magnetite iron ore green pellets,” Powder Techn. 183 (2), 247–259 (2008).

    Article  CAS  Google Scholar 

  6. A. R. Firth, “Interactions between magnetite oxidation, calcination of carbonate minerals and melt formation in iron ore pellets,” in Proceedings of Iron Ore Conference (Fremantle, 2005), pp. 335–341.

  7. S. G. Melamud and B. P. Yur’ev, “Calculation procedure of stresses at the interface with different solidification temperatures of slag inclusions,” Izv. Vyssh. Uchebn. Zaved., Chern. Metall. 58 (12), 865–870 (2015).

    Google Scholar 

  8. Yu. K. Egorov-Tismenko, Crystallography and Crystal Chemistry (Knizhnyi Dom Universitet, Moscow, 2010).

    Google Scholar 

  9. A. G. Bulakh, A. A. Zolotarev, and V. G. Krivovichev, General Mineralogy (Akademiya, Moscow, 2008).

    Google Scholar 

  10. S. V. Plotnikov and A. S. Bormotov, “Mechanism of phase transitions during oxidative roasting of industrial pellets from concentrates of iron quartzite ores,” Izv. Vyssh. Uchebn. Zaved., Chern. Metall., No. 3, 29–32 (2011).

  11. V. P. Radchenko and Yu. A. Eremin, Rheological Deformation and Fracture of Materials and Units of Constructions (Mashinostroenie-1, Moscow, 2004).

  12. A. Ya. Malkin and A. I. Isaev, Rheology: Concepts, Methods, and Applications (Professiya, Moscow, 2007).

    Google Scholar 

  13. W. W. Wendlandt, Thermal Methods of Analysis (Wiley, New York, 1964).

    Google Scholar 

  14. B. P. Yur’ev, V. A. Gol’tsev, V. I. Matyukhin, O. V. Matyukhin, and O. Yu. Sheshukov, Determination of Thermal Physical Properties of Materials of Metallurgical Production (OOO UIPTs, Yekaterinburg, 2014).

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Funding

This work was supported by the Russian Foundation for Basic Research, project no. 19-38-90192\19.

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Correspondence to B. P. Yur’ev.

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Translated by E. Yablonskaya

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Yur’ev, B.P., Dudko, V.A. Mathematical Model Study of the Process Kinetics during Roasting of Iron Ore Pellets. Russ. Metall. 2021, 579–585 (2021). https://doi.org/10.1134/S0036029521050128

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  • DOI: https://doi.org/10.1134/S0036029521050128

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