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Gas-liquid mass transfer and flow phenomena in a peirce-smith converter: A numerical model study

  • Hong-liang Zhao
  • Xing Zhao
  • Liang-zhao Mu
  • Li-feng ZhangEmail author
  • Li-qiang Yang
Article
  • 4 Downloads

Abstract

A numerical model was established to simulate the flow field in a Peirce-Smith converter bath, which is extensively adopted in copper making. The mean phase and velocity distribution, circular area, and mean wall shear stress were calculated to determine the optimal operation parameter of the converter. The results showed that the slag phase gathered substantially in the dead zone. The circular flow was promoted by increasing the gas flow rate, Q, and decreasing the nozzle height, h. However, these operations significantly aggravate the wall shear stress. Reducing the nozzle diameter, d, increases the injection velocity, which may accelerate the flow field. However, when the nozzle diameter has an interval design, the bubble behaviors cannot be combined, thus, weakening the injection efficiency. Considering the bal-ance between the circular flow and wall shear stress in this model, the optimal operation parameters were Q = 30000–35000 m3/h, h = 425–525 mm, and d = 40 & 50 mm.

Keywords

phase distribution velocity distribution wall shear stress Peirce-Smith converter 

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Notes

Acknowledgments

This work was financially supported by the Guangxi In-novation-Driven Development Project (No. AA18242042-1) and the National Natural Science Foundation of China (No. 51504018).

References

  1. [1]
    N.J. Lawson and M.R. Davidson, Oscillatory flow in a phys-ical model of a thin slab casting mold with a bifurcated sub-mergedentry nozzle, J. Fluids Eng., 124(2002), No. 2, p. 535.CrossRefGoogle Scholar
  2. [2]
    G.A. Panaras, A. Theodorakakos, and G. Berggeles, Numerical investigation of the free surface in a continuous steel casting mold model, Metall. Mater. Trans. B., 29(1998), No. 5, p. 1117.CrossRefGoogle Scholar
  3. [3]
    F. Li, Fluid Flow Phenomena and Transition of Inclusions during RH Refming Process [Dissertation], niversity of Science and Technology Beijing, Beijing, 2016, p. 21.Google Scholar
  4. [4]
    D.K. Chibwe, G. Akdogan, and P. Taskinen, Numerical investigation of combined top and lateral blowing in a Peirce-Smith converter, Chem. Prod. Process Model, 8(2013), No.2,p. 119.Google Scholar
  5. [5]
    O. Haida and J.K. Brimacombe, Physical model study of the effect of gas kinetic energy in injection refming processes, Trans. Iron Steel Inst. Jpn., 25(1985), No. 1, p. 14.CrossRefGoogle Scholar
  6. [6]
    A. Valencia, R. Paredes, M. Rosales, E. Godoy, and J. Orte-ga, Fluid dynamics of submerged gas injection into liquid in a model of copper converter, Int. Commun. Heat Mass Trans-fer, 31(2004), No. 1, p.21.CrossRefGoogle Scholar
  7. [7]
    H.T. Ling, F. Li, L.F. Zhang, and A.N. Conejo, Investigation on the effect of nozzle number on the recirculation rate and mixing time in the RH process using VOF + DPM model, Metall. Mater. Trans. 5, 47(2016), No. 3,p. 1950.CrossRefGoogle Scholar
  8. [8]
    Y.H. Li, Y.P. Bao, R. Wang, L.F. Ma, and J.S. Liu, Modeling study on the flow patterns of gas-liquid flow for fast decar-burization during the Rh process, Int. J. Miner. Metall. Mater, 25(2018), No. 2, p. 153.CrossRefGoogle Scholar
  9. [9]
    T. Stapurewicz and N J. Themelis, Mixing and mass transfer phenomena in bottom injected gasliquid reactors, Can. Metall. Q., 26(1987), No. 2, p. 123.CrossRefGoogle Scholar
  10. [10]
    N. Kochi, K. Mori, Y. Sasaki, and M. Iguchi, Mixing time in a bath in the presence of swirl motion induced by horizontal gas injection with an L-shaped lance, ISIJ Int., 51(2011), No. 3,p. 344.Google Scholar
  11. [11]
    P. Ternstedt, A. Tilliander, P.G. Jönsson, and M. Iguchi, Mixing time in a side-blown converter, ISIJ Int., 50(2010), No. 5, p. 663.CrossRefGoogle Scholar
  12. [12]
    L.F. Zhang and F. Li, Investigation on the fluid flow and mixing phenomena in a Ruhrstahl-Heraeus (RH) steel de-gasser using physical modeling, JOM, 66(2014), No. 7, p. 1227.CrossRefGoogle Scholar
  13. [13]
    Y. Liu, M. Sano, Q. Wang, T.A. Zhang, and J.C. He, Physical simulation on desulfurization by single blow grain Mg, J. Northeastern Univ., 27(2006), No. S2, p. 100.Google Scholar
  14. [14]
    Y. Fukunaka, M.F. Jiang, T. Yamamoto, Z. Asaki, and Y. Kondo, Nonuniformity of NaOH concentration and effective bubble diameter in CO2 injection into aqueous NaOH solution, Metall. Mater. Trans. B, 20(1989), No. 1, p. 5.CrossRefGoogle Scholar
  15. [15]
    Y. Liu, M. Sano, and T.A. Zhang, Mechanical sturing for gas injection refming in iron and steel making: 1. Intensification of bubble disintegration, [in] The 154th ISIJ Meeting, Gifu, 2007, p. 4.Google Scholar
  16. [16]
    A. Sokolichin, G. Eigenberger, A. Lapin, and A. Lübert, Dynamic numerical simulation of gas-liquid two-phase flows Euler/Euler versus Euler/Lagrange, Chem. Eng. Sci., 52(1997), No. 4, p. 611.CrossRefGoogle Scholar
  17. [17]
    J. Vaarno, J. Pitkala, T. Ahokainen, and A. Jokilaakso, Modelling gas injection of a Peirce-Smith converter, Appl. Math. Modell, 22(1998), No. 11, p. 907.CrossRefGoogle Scholar
  18. [18]
    L.F. Zhang, B. Thomas, K.K. Cai, J. Cui, and L.X. Zhu, Inclusion investigation during clean steel production at Baos-teel, [in] ISS Tech Conference Proceedings, Indianapolis, 2003, p. 141.Google Scholar
  19. [19]
    J. Aoki, L.F. Zhang and B.G. Thomas, Modeling of inclusion removal in ladle refming, [in] Proceedings of the 3rd International Congress on the Science and Technology of Steelmak-ing, Charlotte, 2005, p. 319.Google Scholar
  20. [20]
    C. Real, L. Hoyos, F. Cervantes, R. Miranda, M. Palo-mar-Pardave, M. Barron and J. Gonzalez, Fluid characteriza-tion of copper converters, Mecanica Comput., 26(2007), No. 15, p. 1311.Google Scholar
  21. [21]
    X. Zhao, H.L. Zhao, L.F. Zhang, and L.Q. Yang, Gasliquid mass transfer and flow phenomena in the Peirce-Smith converter: a water model study, Int. J. Miner. Metall. Mater., 25(2018), No. 1, p. 37.CrossRefGoogle Scholar

Copyright information

© University of Science and Technology Beijing and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Hong-liang Zhao
    • 1
    • 2
  • Xing Zhao
    • 1
  • Liang-zhao Mu
    • 1
  • Li-feng Zhang
    • 1
    • 2
    Email author
  • Li-qiang Yang
    • 1
    • 3
  1. 1.School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijingChina
  2. 2.Beijing Key Laboratory of Green Recycling and Extraction of MetalBeijingChina
  3. 3.Beijing Representative Office of Chambishi Copper Smelter Ltd.BeijingChina

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