Russian Journal of Non-Ferrous Metals

, Volume 58, Issue 6, pp 586–590 | Cite as

Thermodynamic Analysis of Zinc Ferrite Decomposition in Electric Arc Furnace Dust by Lime

  • S. A. Yakornov
  • A. M. Pan’shin
  • P. I. Grudinsky
  • V. G. Dyubanov
  • L. I. Leont’ev
  • P. A. Kozlov
  • D. A. Ivakin
Metallurgy of Nonferrous Metals

Abstract

Scientific basis of pyrometallurgical processing technology of dusts of electric steelmaking containing zinc ferrites was investigated. The thermodynamic analysis of the decomposition of zinc ferrite with lime was carried out. The analysis of calculated data has shown that, in order to decompose more than 90% ZnFe2O4, it is necessary to add no less than 46% CaO for dust, while to decompose more than 95% ZnFe2O4, no less than 60% CaO is necessary. The results of the calculation were verified experimentally using a laboratory furnace. The experimental calcination of dust in air with the addition of lime in an amount of 60% of the dust weight at 1000°C with a holding time of 4 h confirmed that the decomposition of zinc ferrite with calcium oxide with the formation of zinc oxide and dicalcium ferrite occurs. In addition, sublimates were also formed in an amount of 50 kg per 1 t of dust containing 29% of lead and 15% of zinc. Dust calcination with lime can be applied to transform zinc from ferrite into a soluble oxide form. Intermediate products for the recovery of zinc and lead can be obtained by the calcination. After zinc leaching, it is possible to obtain an iron-containing product, which can be used in ferrous metallurgy. This approach has a series of process advantages compared with the well-known Waelz technology. In particular, calcination with lime requires lower temperature (1000°C) than the known technology (1250°C), it eliminates the second stage of the Waelz treatment necessary to purify zinc oxide fed for leaching from halides, considerably reduces coke consumption, and significantly simplifies gas cleaning from dust due to a decrease in the amount of sublimates by a factor of 6–8.

Keywords

zinc ferrite calcium ferrite calcium oxide zinc oxide thermodynamic analysis Waelz process EAF dust 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Maccagni, M.G., INDUTEC®/EZINEX® integrate process on secondary zinc-bearing materials, J. Sustain. Metall., 2016, vol. 2, pp. 133–140.CrossRefGoogle Scholar
  2. 2.
    Roth, J.L., Frieden, R., Hansmann, T., Monai, J., and Solvi, M., PRIMUS, a new process for recycling byproducts and producing virgin iron, Rev. Metall., 2001, vol. 98, no. 11, pp. 987–996.CrossRefGoogle Scholar
  3. 3.
    Verscheure, K., Van Camp, M., Blanpain, B., Wollants, P., Hayes, P., and Jak, E., Continuous fuming of zinc-bearing residues. Part II. The submerged-plasma zinc-fuming process, Metall. Trans. B., 2007, vol. 38B, pp. 21–33.CrossRefGoogle Scholar
  4. 4.
    Tateishi, M., Fujimoto, H., Harada, T., and Sugitatsu, H., Development of EAF dust recycling and melting technology using the coal-based FASTMELT® process. http://midrex.com/assets/user/media/Development_of_ EAF_Dust_Recycling.pdf (accessed: 03.04.2017).Google Scholar
  5. 5.
    Nakayama, M., New EAF dust-treatment process: ESRF. http://steelplantech.com/wp-content/uploads/2013/11/201105_EAF_DustTreatment_byNewProcess.pdf (accessed: 03.04.2017).Google Scholar
  6. 6.
    Grieshaber, K.W., Philipp, C.T., and Bennett, G.F., Process for recycling spent potliner and electric arc furnace dust into commercial products using oxygen enrichment, Waste Manag., 1994, vol. 14, nos. 3–4, pp. 267–276.CrossRefGoogle Scholar
  7. 7.
    Amer, S., Figueiredo, J.M., and Luis, A., The recovery of zinc from the leach liquors of the CENIM-LENTI process by solvent extraction with di(-2-ethylhexyl) phosphoric acid, Hydrometallurgy, 1995, vol. 37, no. 3, pp. 323–337.CrossRefGoogle Scholar
  8. 8.
    Bratina, J.E. and Lenti, K.M., PIZO furnace demonstration operation for processing of EAF Dust. http://pizotech.com/AISI%20May%2007.doc (accessed: 03.04.2017).Google Scholar
  9. 9.
    Youcai, Z. and Stanforth, R., Integrated hydrometallurgical process for production of zinc from electric arc furnace dust in alkaline medium, J. Hazard. Mater., 2000, vol. 80, nos. 1–3, pp. 223–240.CrossRefGoogle Scholar
  10. 10.
    Shawabkeh, R.A., Hydrometallurgical extraction of zinc from Jordanian electric arc furnace dust, Hydrometallurgy, 2010, vol. 104, pp. 61–65.CrossRefGoogle Scholar
  11. 11.
    Dutra, A., Paiva, P., and Tavares, L., Alkaline leaching of zinc from electric arc furnace steel dust, Miner. Eng., 2006, vol. 19, pp. 478–485.CrossRefGoogle Scholar
  12. 12.
    Cruells, M., Roca, A., and Nunez, C., Electric arc furnace flue dusts: characterization and leaching with sulphuric acid, Hydrometallurgy, 1992, vol. 31, no. 3, pp. 213–231.CrossRefGoogle Scholar
  13. 13.
    Lenz, D.M. and Martins, F.B., Lead and zinc selective precipitation from leach electric arc furnace dust solutions, Matéria (Rio de Janeiro), 2007, vol. 12, no. 3, pp. 503–509.CrossRefGoogle Scholar
  14. 14.
    Ruiz, O., Clemente, C., Alonso, M., and Alguacil, F.J., Recycling of an electric arc furnace flue dust to obtain high grade ZnO, J. Hazard. Mater., 2007, vol. 141, pp. 33–36.CrossRefGoogle Scholar
  15. 15.
    Kazanbaev, L.A., Kozlov, P.A., Kubasov, V.L., and Kolesnikov, A.V., Gidrometallurgiya tsinka (ochistka rastvorov i elektroliz) (Zinc Hydrometallurgy (Solution Purification and Electrowinning), Moscow: Ruda i Metally, 2006.Google Scholar
  16. 16.
    Kozlov, P.A., The Waelz Process, Moscow: Ore and Metals, 2003.Google Scholar
  17. 17.
    Holloway, P.C. and Etsell, T.H., Recovery of zinc, gallium and indium from La Oroya zinc ferrite using Na2CO3 roasting, Trans. Inst. Min. Metall. Sect. C. Miner. Process. Extr. Metall., 2008, vol. 117, no. 7, pp. 137–146.CrossRefGoogle Scholar
  18. 18.
    Wu, C.C., Chang, F.C., Chen, W.S., Tsai, M.S., and Wang, Y.N., Reduction behavior of zinc ferrite in EAFdust recycling with CO gas as a reducing agent, J. Environ. Manage, 2014, vol. 143, pp. 208–213.CrossRefGoogle Scholar
  19. 19.
    Zhang, Y., Yu, X., and Li, X., Zinc recovery from franklinite by sulphation roasting, Hydrometallurgy, 2011, vol. 109, pp. 211–214.CrossRefGoogle Scholar
  20. 20.
    Ageenkov, V.G. and Toropova, T.G., Revisiting zinc ferritization, Tsvetn. Met., 1956, no. 5, pp. 50–54.Google Scholar
  21. 21.
    Sergeev, G.I., Lykasov, A.A., Khudyakov, I.F., Guseva, O.A., and Gorbashov, V.V., Revisiting an increase in cadmium extraction during roasting of zinc concentrates with the calcium oxide addition, Tsvetn. Met., 1983, no. 2, pp. 24–26.Google Scholar
  22. 22.
    Roine, A., Outokumpu HSC Chemistry for Windows. Chemical Reaction and Equilibrium Software with Extensive Thermochemical Database, Pori: Outokumpu Research OY, 2002.Google Scholar

Copyright information

© Allerton Press, Inc. 2017

Authors and Affiliations

  • S. A. Yakornov
    • 1
  • A. M. Pan’shin
    • 1
  • P. I. Grudinsky
    • 2
  • V. G. Dyubanov
    • 2
  • L. I. Leont’ev
    • 2
  • P. A. Kozlov
    • 1
    • 3
  • D. A. Ivakin
    • 3
  1. 1.OOO UGMK-HoldingVerkhnyaya Pyshma, Sverdlovsk oblastRussia
  2. 2.Baikov Institute of Metallurgy and Materials Science (IMET)Russian Academy of SciencesMoscowRussia
  3. 3.PAO Chelyabinsk Zinc PlantChelyabinskRussia

Personalised recommendations