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Effect of reductant type on the embedding direct reduction of beach titanomagnetite concentrate

  • Yong-qiang Zhao
  • Ti-chang SunEmail author
  • Hong-yu ZhaoEmail author
  • Chao Chen
  • Xiao-ping Wang
Article

Abstract

Iron and titanium were recovered from beach titanomagnetite (TTM) concentrate by embedding direct reduction and magnetic separation. The reduction products and the effects of the reductant type and reduction temperature on the reduction behavior were investigated. The results showed that the reduction of TTM concentrate was strongly related to the gasification reactivity of the reductant. Bitumite presented a better product index than wheat-straw biochar and coke, mainly because the gasification reactivity of bitumite was better than that of the other reductants. In addition, high temperatures were not beneficial to embedding direct reduction because of the emergence of a molten phase and iron-joined crystals, which in turn reduced the diffusion rate of the reducing gas and impeded the reduction reaction in the central area of the roasted briquette. The use of bitumite as the reductant at a C/Fe molar ratio of 1.4 and a reduction temperature of 1200°C for 120 min resulted in direct-reduction iron powder assaying 90.28wt% TFe and 0.91wt% TiO2 with an iron recovery of 91.83% and titanium concentrate assaying 46.01wt% TiO2 with a TiO2 recovery of 91.19%. Titanium existed mainly in the form of anosovite and ilmenite in the titanium concentrate.

Keywords

beach titanomagnetite concentrate embedding direct reduction magnetic separation reductant reduction temperature 

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Notes

Acknowledgement

This work was financially supported by the National Natural Science Foundation of China (Nos. 51474018 and 51674018).

References

  1. [1]
    W.S. Zhang, Z.W. Zhu, and C.Y. Cheng, A literature review of titanium metallurgical processes, Hydrometallurgy, 108(2011), No. 3–4, p. 177.CrossRefGoogle Scholar
  2. [2]
    J. Deng, X. Xue, and G.G. Liu, Current situation and development of comprehensive utilization of vanadium-bearing titanomagnetite at Pangang, J. Marer. Met., 6(2007), No. 2, p. 83.Google Scholar
  3. [3]
    Y.M. Wang, Z.F. Yuan, Z.C. Guo, Q.Q. Tang, Z.Y. Li, and W.Z. Jiang, Reduction mechanism of natural ilmenite with graphite, Trans. Nonferrous Met. Soc. China, 18(2008), No. 4, p. 962.CrossRefGoogle Scholar
  4. [4]
    H.Y. Sun, J.S. Wang, X.J. Dong, and Q.G. Xue, A literature review of titanium slag metallurgical processes, Metal. Int., 17(2012), No. 7, p. 49.Google Scholar
  5. [5]
    E. Park and O. Ostrovski, Reduction of titania-ferrous ore by carbon monoxide, ISIJ Int., 43(2003), No. 9, p. 1316.CrossRefGoogle Scholar
  6. [6]
    T.Y. Hu, T.C. Sun, J. Kou, C. Geng, X.P. Wang, and C. Chen, Recovering titanium and iron by co-reduction roasting of seaside titanomagnetite and blast furnace dust, Int. J. Miner. Process., 165(2011), p. 28.CrossRefGoogle Scholar
  7. [7]
    Z.S. Hu, Y.S. Zhang, Y.H. Yang, X.Y. Li, and M.G. Zhou, Problems and Suggestions in the Exploitation of Beach Placer, Multipurpose Util. Miner. Res., (2011), No. 4, p. 74.Google Scholar
  8. [8]
    S.H. Wu, Reasonable utilization ways of V-Ti bearing beach placer, Sintering Pelletizing, 36(2011), No. 2, p. 35.Google Scholar
  9. [9]
    B.X. Hong and W.Z. Fu, A study of the mineral composition of vanadium titanium magnetite in Indonesia, Multipurpose Util. Miner. Res., (2012), No. 5, p. 44.Google Scholar
  10. [10]
    D.S. Chen, B. Song, L.N. Wang, T. Qi, Y. Wang, and W.J. Wang, Solid state reduction of Panzhihua titanomagnetite concentrates with pulverized coal, Miner. Eng., 24(2011), No. 8, p. 864.CrossRefGoogle Scholar
  11. [11]
    B.C. Jena, W. Dresler, and I.G. Reilly, Extraction of titanium, vanadium and iron from titanomagnetite deposits at pipestone lake, Manitoba, Canada, Miner. Eng., 8(1995), No. 1–2, p. 159.CrossRefGoogle Scholar
  12. [12]
    K.C. Sole, Recovery of titanium from the leach liquors of titaniferous magnetites by solvent extraction: Part 1. Review of the literature and aqueous thermodynamics, Hydrometallurgy, 51(1999), No. 2, p. 239.CrossRefGoogle Scholar
  13. [13]
    K.C. Sole, Recovery of titanium from the leach liquors of titaniferous magnetites by solvent extraction: Part 2. Laboratory- scale studies, Hydrometallurgy, 51(1999), No. 3, p. 263.CrossRefGoogle Scholar
  14. [14]
    T.Y. Hu, T.C. Sun, J. Kou, C. Geng, and Y.Q. Zhao, Effects and mechanisms of fluorite on the co-reduction of blast furnace dust and seaside titanomagnetite, Int. J. Miner. Metall. Mater., 24(2017), No. 11, p. 1201.CrossRefGoogle Scholar
  15. [15]
    E.X. Gao, T.C. Sun, C.Y. Xu, Z.G. Liu, Z.Z. Liu, and C.X. Yu, Titanium and ferrum separation of a seaside titanomagnetite based on reduction roasting, Met. Mine, 2013, No. 11, p. 46.Google Scholar
  16. [16]
    C. Geng, T.C. Sun, H.F. Yang, Y.W. Ma, E.X. Gao, and C.Y. Xu, Effect of Na2SO4 on the embedding direct reduction of beach titanomagnetite and the separation of titanium and iron by magnetic separation, ISIJ Int., 55(2015), No. 12, p. 2543CrossRefGoogle Scholar
  17. [17]
    E.X. Gao, T.C. Sun, Z.G. Liu, C. Geng, and C.Y. Xu, Effect of sodium sulfate on direct reduction of beach titanomagnetite for separationof iron and titanium, J. Iron Steel Res. Int., 23(2016), No. 5, p. 428.CrossRefGoogle Scholar
  18. [18]
    M.Y. Wang, S.F. Zhou, X.W. Wang, B.F. Chen, H.X. Yang, S.K. Wang, and P.F. Luo, Recovery of Iron from chromium vanadium-bearing titanomagnetite concentrate by direct reduction, JOM, 68(2016), No. 10, p. 2698.CrossRefGoogle Scholar
  19. [19]
    G.W. Wang, J.L. Zhang, X.M. Hou, J.G. Shao, and W.W. Geng, Study on CO2 gasification properties and kinetics of biomass chars and anthracite char, Bioresour. Technol., 177(2015), p. 66.CrossRefGoogle Scholar
  20. [20]
    W. Lv, X.W. Lv, J.Y. Xiang, Y.Y. Zhang, S.P. Li, C.G. Bai, B. Song, and K.X. Han, A novel process to prepare high-titanium slag by carbothermic reduction of pre-oxidized ilmenite concentrate with the addition of Na2SO4, Int. J. Miner. Process., 167(2017), p. 68.CrossRefGoogle Scholar
  21. [21]
    W. Yu, T.C. Sun, Q. Cui, C.Y. Xu, and J. Kou, Effect of coal type on the reduction and magnetic separation of a high-phosphorus oolitic hematite ore, ISIJ Int., 55(2015), No. 3, p. 536.CrossRefGoogle Scholar
  22. [22]
    S.M. Jung, Thermogravimetry and reaction gas analysis of the carbothermic reduction of titanomagnetite ores with char, ISIJ Int., 54(2014), No. 4, p. 781.CrossRefGoogle Scholar
  23. [23]
    W. Yu, Study on the Preparation of High-phosphours Oolitic Hematite-coal Composite Briquette and Its Direct Reduction-magnetic Separation [Dissertation], University of Science and Technology Beijing, Beijing, 2015, p. 64.Google Scholar
  24. [24]
    Y.L. Li, T.C. Sun, J. Kou, Q. Guo, and C.Y. Xu, Study on phosphorus removal of high-phosphorus oolitic hematite by coal-based direct reduction and magnetic separation, Miner. Process. Extr. Metall. Rev., 35(2014), No. 1, p. 66.CrossRefGoogle Scholar

Copyright information

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

Authors and Affiliations

  1. 1.Key Laboratory for High-Efficient Mining and Safety of Metal Mines, Ministry of EducationUniversity of Science and Technology BeijingBeijingChina
  2. 2.School of Civil and Resource EngineeringUniversity of Science and Technology BeijingBeijingChina

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