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Volume 24 Issue 3
Mar.  2017
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文章导航 >  矿物冶金与材料学报（英文）  > 2017  >  24(3): 240-248
Ying-yi Zhang, Wei Lü, Xue-wei Lü, Sheng-ping Li, Chen-guang Bai, Bing Song, and Ke-xi Han, Isothermal reduction kinetics of Panzhihua ilmenite concentrate under 30vol% CO-70vol% N2 atmosphere, Int. J. Miner. Metall. Mater., 24(2017), No. 3, pp. 240-248. https://doi.org/10.1007/s12613-017-1401-x
Cite this article as:
Ying-yi Zhang, Wei Lü, Xue-wei Lü, Sheng-ping Li, Chen-guang Bai, Bing Song, and Ke-xi Han, Isothermal reduction kinetics of Panzhihua ilmenite concentrate under 30vol% CO-70vol% N2 atmosphere, Int. J. Miner. Metall. Mater., 24(2017), No. 3, pp. 240-248. https://doi.org/10.1007/s12613-017-1401-x
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Isothermal reduction kinetics of Panzhihua ilmenite concentrate under 30vol% CO-70vol% N2 atmosphere

  • College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China

  • Panzhihua Iron and Steel Research Institute, Panzhihua 617000, China

  • 通讯作者:

    Xue-wei Lü    E-mail: lvxuewei@cqu.edu.cn

  • The reduction of ilmenite concentrate in 30vol% CO-70vol% N2 atmosphere was characterized by thermogravimetric and differential thermogravimetric (TG-DTG) analysis methods at temperatures from 1073 to 1223 K. The isothermal reduction results show that the reduction process comprised two stages; the corresponding apparent activation energy was obtained by the iso-conversional and model-fitting methods. For the first stage, the effect of temperature on the conversion degree was not obvious, the phase boundary chemical reaction was the controlling step, with an apparent activation energy of 15.55-40.71 kJ·mol-1. For the second stage, when the temperatures was greater than 1123 K, the reaction rate and the conversion degree increased sharply with increasing temperature, and random nucleation and subsequent growth were the controlling steps, with an apparent activation energy ranging from 182.33 to 195.95 kJ·mol-1. For the whole reduction process, the average activation energy and pre-exponential factor were 98.94-118.33 kJ·mol-1 and 1.820-1.816 min-1, respectively.
    • Research Article

    Isothermal reduction kinetics of Panzhihua ilmenite concentrate under 30vol% CO-70vol% N2 atmosphere

    + Author Affiliations
      Abstract
    • The reduction of ilmenite concentrate in 30vol% CO-70vol% N2 atmosphere was characterized by thermogravimetric and differential thermogravimetric (TG-DTG) analysis methods at temperatures from 1073 to 1223 K. The isothermal reduction results show that the reduction process comprised two stages; the corresponding apparent activation energy was obtained by the iso-conversional and model-fitting methods. For the first stage, the effect of temperature on the conversion degree was not obvious, the phase boundary chemical reaction was the controlling step, with an apparent activation energy of 15.55-40.71 kJ·mol-1. For the second stage, when the temperatures was greater than 1123 K, the reaction rate and the conversion degree increased sharply with increasing temperature, and random nucleation and subsequent growth were the controlling steps, with an apparent activation energy ranging from 182.33 to 195.95 kJ·mol-1. For the whole reduction process, the average activation energy and pre-exponential factor were 98.94-118.33 kJ·mol-1 and 1.820-1.816 min-1, respectively.
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    • [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.
      [2]
      Y.M. Liu, T. Qi, J.L. Chu, Q.J. Tong, and Y. Zhang, Decomposition of ilmenite by concentrated KOH solution under atmospheric pressure, Int. J. Miner. Process., 81(2006), No. 2, p. 79.
      [3]
      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.
      [4]
      E. Park and O. Ostrovski, Reduction of titania-ferrous ore by carbon monoxide, ISIJ Int., 43(2003), No. 9, p. 1316.
      [5]
      N. El-Hazek, T.A. Lasheen, R. El-Sheikh, and S.A. Zaki, Hydrometallurgical criteria for TiO2 leaching from Rosetta ilmenite by hydrochloric acid, Hydrometallurgy, 87(2007), No. 1-2, p. 45.
      [6]
      A. Adipuri, Y. Li, G.Q. Zhang, and O. Ostrovski, Chlorination of reduced ilmenite concentrates and synthetic rutile, Int. J. Miner. Process., 100(2011) No. 3-4, p. 166.
      [7]
      C.S. Kucukkaragoz and R.H. Eric, Solid state reduction of a natural ilmenite, Miner. Eng., 19(2006), No. 3, p. 334.
      [8]
      M.R. Lanyon, T. Lwin, and R.R. Merritt, The dissolution of iron in the hydrochloric acid leach of an ilmenite concentrate, Hydrometallurgy, 51(1999), No. 3, p. 299.
      [9]
      C. Li, B. Liang, and H.Y. Wang, Preparation of synthetic rutile by hydrochloric acid leaching of mechanically activated Panzhihua ilmenite, Hydrometallurgy, 91(2008), No. 1-4, p. 121.
      [10]
      O. Ostrovski, G. Zhang, R. Kononov, M.A.R. Dewan, and J. Li, Carbothermal solid state reduction of stable metal oxides, Steel Res. Int., 81(2010), No. 10, p. 841.
      [11]
      Y.M. Wang, Z.F. Yuan, H. Matsuura, and F. Tsukihashi, Reduction extraction kinetics of titania and iron from an ilmenite by H2-Ar gas mixtures, ISIJ Int., 49(2009), No. 2, p. 164.
      [12]
      S. Seim and L. Kolbeinsen, Update on the equilibrium between liquid Fe-Ti-O slags and metallic iron, Steel Res. Int., 81(2010), No. 12, p. 1051.
      [13]
      N.Y. Ma and N.A. Warner, Smelting reduction of ilmenite by carbon in molten pig iron, Can. Metall. Q., 38(1999), No. 3, p. 165.
      [14]
      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.
      [15]
      T.E. Dancy, The development of direct reduction process, Scand. J. Metall., 22(1993), p. 100.
      [16]
      J. Bujak, Thermal treatment of medical waste in a rotary kiln, J. Environ. Manage., 162(2015), p. 139.
      [17]
      P.L. Vijay, R. Venugopalan, and D. Sathiyamoorthy, Preoxidation and hydrogen reduction of ilmenite in a fluidized bed reactor, Metall. Mater. Trans. B., 27(1996), No. 5, p. 731.
      [18]
      H.Y. Sun, J.S. Wang, Y.H. Han, X.F. She, and Q.G. Xue, Reduction mechanism of titanomagnetite concentrate by hydrogen, Int. J. Miner. Process., 125(2013), No. 3, p. 122.
      [19]
      J. Dang, G.H. Zhang, and K.C. Chou, Kinetics and mechanism of hydrogen reduction of ilmenite powders, J. Alloys Compd., 619(2015), p. 443.
      [20]
      F. Liu, Y. Zhang, L.Y. Chen, D.L. Qian, J.K. Neathery, S. Kozo, and K.L. Liu, Investigation of a Canadian ilmenite as an oxygen carrier for chemical looping combustion, Energy Fuels., 27(2013), No. 10, p. 5987.
      [21]
      S. Vyazovkin and C.A. Wight, Model-free and model-fitting approaches to kinetic analysis of isothermal and nonisothermal data, Thermochim. Acta, 340-341(1999), p. 53.
      [22]
      P. M.D. Benoit, R.G. Ferrillo, and A.H. Granzow, Kinetic applications of thermal analysis, J. Therm. Anal. Calorim., 30(1985), No. 4, p. 869.
      [23]
      M.J. Starink, The determination of activation energy from linear heating rate experiments:a comparison of the accuracy of isoconversion methods, Thermochim. Acta., 404(2003), No. 1-2, p. 163.
      [24]
      M.J. Starink, Activation energy determination for linear heating experiments:deviations due to neglecting the low temperature end of the temperature integral, J. Mater. Sci., 42(2007), No. 2, p. 483.
      [25]
      J.M. Criado, J. Málek, and A. Ortega, Applicability of the master plots in kinetic analysis of non-isothermal data, Thermochim. Acta, 147(1989), No. 2, p. 377.
      [26]
      J. Málek, The kinetic analysis of non-isothermal data, Thermochim. Acta, 200(1992), No. 92, p. 257.
      [27]
      P. Budrugeac, E. Segal, L.A. Pérez-Maqueda, and J.M. Criado, The use of the IKP method for evaluating the kinetic parameters and the conversion function of the thermal dehydrochlorination of PVC from non-isothermal data, Polym. Degrad. Stab., 84(2004), No. 2, p. 311.
      [28]
      P.E. Sánchez-Jiménez, A. Perejón, J.M. Criado, M.J. Diánez and L.A. Pérez-Maqueda, Kinetic model for thermal dehydrochlorination of poly(vinyl chloride), Polymer, 51(2010), No. 17, p. 3998.
      [29]
      L. Huang, Y. Chen, G. Liu, S.G. Li, Y. Liu, and X. Gao, Non-isothermal pyrolysis characteristics of giant reed (Arundo donax L.) using thermogravimetric analysis, Energy, 87(1989), p. 31.
      [30]
      P. Ptáček, D. Kubátová, J. Havlica, J. Brandštetr, F. Šoukal, and T. Opravil, Isothermal kinetic analysis of the thermal decomposition of kaolinite:the thermogravimetric study, Thermochim. Acta, 204(2010), No. 1-2, p. 24.
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