留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
邮箱
手机号码
标题
留言内容
验证码
Volume 25 Issue 7
Jul.  2018
Turn off MathJax
目录
数据统计

分享

计量
  • 文章访问数:  423
  • HTML全文浏览量:  55
  • PDF下载量:  13
  • 被引次数: 0
文章导航 >  矿物冶金与材料学报（英文）  > 2018  >  25(7): 752-761
Rong-rong Wang, Jian-liang Zhang, Yi-ran Liu, An-yang Zheng, Zheng-jian Liu, Xing-le Liu, and Zhan-guo Li, Thermal performance and reduction kinetic analysis of cold-bonded pellets with CO and H2 mixtures, Int. J. Miner. Metall. Mater., 25(2018), No. 7, pp. 752-761. https://doi.org/10.1007/s12613-018-1623-6
Cite this article as:
Rong-rong Wang, Jian-liang Zhang, Yi-ran Liu, An-yang Zheng, Zheng-jian Liu, Xing-le Liu, and Zhan-guo Li, Thermal performance and reduction kinetic analysis of cold-bonded pellets with CO and H2 mixtures, Int. J. Miner. Metall. Mater., 25(2018), No. 7, pp. 752-761. https://doi.org/10.1007/s12613-018-1623-6
shu
引用本文 PDF XML SpringerLink
研究论文

Thermal performance and reduction kinetic analysis of cold-bonded pellets with CO and H2 mixtures

  • School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China

  • School of Chemical Engineering, University of New South Wales, Sydney, Australia

  • 通讯作者:

    Zheng-jian Liu    E-mail: liuzhengjian@ustb.edu.cn

  • Cold-bonded pellets, to which a new type of inorganic binder was applied, were reduced by H2–CO mixtures with different H2/CO molar ratios (1:0, 5:2, 1:1, 2:5, and 0:1) under various temperatures (1023, 1123, 1223, 1323, and 1423 K) in a thermogravimetric analysis apparatus. The effects of gas composition, temperature, and binder ratio on the reduction process were studied, and the microstructure of reduced pellets was observed by scanning electron microscopy–energy-dispersive spectrometry (SEM-EDS). The SEM-EDS images show that binder particles exist in pellets in two forms, and the form that binder particles completely surround ore particles has a more significant hinder effect on the reduction. The reduction equilibrium constant, effective diffusion coefficient, and the reaction rate constant were calculated on the basis of the unreacted core model, and the promotion effect of temperature on reduction was further analyzed. The results show that no sintering phenomenon occurred at low temperatures and that the increasing reaction rate constant and high gas diffusion coefficient could maintain the promotion effect of temperature; however, when the sintering phenomenon occurs at high temperatures, gas diffusion is hindered and the promotion effect is diminished. The contribution of the overall equilibrium constant to the promotion effect depends on the gas composition.
    • Research Article

    Thermal performance and reduction kinetic analysis of cold-bonded pellets with CO and H2 mixtures

    + Author Affiliations
      Abstract
    • Cold-bonded pellets, to which a new type of inorganic binder was applied, were reduced by H2–CO mixtures with different H2/CO molar ratios (1:0, 5:2, 1:1, 2:5, and 0:1) under various temperatures (1023, 1123, 1223, 1323, and 1423 K) in a thermogravimetric analysis apparatus. The effects of gas composition, temperature, and binder ratio on the reduction process were studied, and the microstructure of reduced pellets was observed by scanning electron microscopy–energy-dispersive spectrometry (SEM-EDS). The SEM-EDS images show that binder particles exist in pellets in two forms, and the form that binder particles completely surround ore particles has a more significant hinder effect on the reduction. The reduction equilibrium constant, effective diffusion coefficient, and the reaction rate constant were calculated on the basis of the unreacted core model, and the promotion effect of temperature on reduction was further analyzed. The results show that no sintering phenomenon occurred at low temperatures and that the increasing reaction rate constant and high gas diffusion coefficient could maintain the promotion effect of temperature; however, when the sintering phenomenon occurs at high temperatures, gas diffusion is hindered and the promotion effect is diminished. The contribution of the overall equilibrium constant to the promotion effect depends on the gas composition.
      • FullText(HTML)
    • loading
      • Supplements(0)
      • References(21)
    • [1]
      R. Petela, W. Hutny, and J.T. Price, Energy and exergy consumption and CO2 emissions in an ironmaking process, Adv. Environ. Res., 6(2002), No. 2, p. 157.
      [2]
      C.H. Rhee, J.Y. Kim, K. Han, C.K. Ahn, and H.D. Chun, Process analysis for ammonia-based CO2 capture in ironmaking industry, Energy Procedia, 4(2011), p. 1486.
      [3]
      K.J. Li, J.L. Zhang, Y.P. Zhang, Z.J. Liu, and X. Jiang, Analysis on development of iron-making process based on the principle of energy-saving and emission reduction, Chin. J. Process Eng., 14(2014), No. 1, p. 162.
      [4]
      F. Chen, Y. Mohassab, T. Jiang, and Y.S. Hong, Hydrogen reduction kinetics of hematite concentrate particles relevant to a novel flash ironmaking process, Metall. Mater. Trans. B, 46(2015), No. 3, p. 1133.
      [5]
      G.Z. Qiu, T. Jiang, Z.C. Huang. D.Q. Zhu, and X.H. Fan, Characterization of preparing cold bonded pellets for direct reduction using an organic binder, ISIJ Int., 43(2003), No. 1, p. 20.
      [6]
      R.R. Wang, J.L. Zhang, Y.R. Liu, Z.J. Liu, X.L. Liu, and N.Y. Li, Effects of an inorganic binder on the strength property of cold-bonded pellets, Metall. Res. Technol., 114(2017), No. 6, p. 604.
      [7]
      Z.C. Huang, L.Z. Zhao, L.Y. Yi, and T. Jiang, Research of the behavior of iron ore pellet on low temperature reduction degradation in gas-based direct reduction process, Met. Mine, (2013), No. 3, p. 69.
      [8]
      P. Wang, Z.Y. Jiang, X.X. Zhang, X.Y. Geng, and S.Y. Hao, Long-term scenario forecast of production routes, energy consumption and emissions for Chinese steel industry, J. Univ. Sci. Technol. Beijing, 36(2014), No. 12, p. 1683.
      [9]
      B.B. Agrawal, K.K. Prasad, S.B. Sarkar, and H.S. Ray, Cold bonded ore-coal composite pellets for sponge ironmaking: Part 1. Laboratory scale development, Ironmaking Steelmaking, 27(2000), No. 6, p. 421.
      [10]
      B.B. Agrawal, K.K. Prasad, S.B. Sarkar, and H.S. Ray, Cold bonded ore-coal composite pellets for sponge ironmaking: Part 2. Plant trials in rotary kiln, Ironmaking Steelmaking, 28(2001), No. 1, p. 23.
      [11]
      N.A. El-Hussiny and M.E.H. Shalabi, A self-reduced intermediate product from iron and steel plants waste materials using a briquetting process, Powder Technol., 205(2011), No. 1-3, p. 217.
      [12]
      E. Cevik, H. Ahlatci, and Y. Sun, Characterization and reduction behavior of cold-bonded composite pellets for direct reduction using an organic binder, Metallurgist, 57(2013), No. 5-6, p. 468.
      [13]
      R. Robinson, High temperature properties of by-product cold bonded pellets containing blast furnace flue dust, Thermochim. Acta, 432(2005), No. 1, p. 112.
      [14]
      A. Pineau, N. Kanari, and I. Gaballah, Kinetics of reduction of iron oxides by H2: Part I: Low temperature reduction of hematite, Thermochim. Acta, 447(2006), No. 1, p. 89.
      [15]
      A. Pineau, N. Kanafi, and I. Gaballah, Kinetics of reduction of iron oxides by H2: Part Ⅱ. Low temperature reduction of magnetite, Thermochim. Acta, 456(2007), No. 2, p. 75.
      [16]
      E.A. Mousa, A. Babich, and D. Senk, Reduction behavior of iron ore pellets with simulated coke oven gas and natural gas, Steel Res. Int., 84(2013), No. 11, p. 1085.
      [17]
      Q.J. Gao, F.M. Shen, X. Jiang, G. Wei, and H.Y, Zheng, Gas-solid reduction kinetic model of MgO-fluxed pellets, Int. J. Miner. Metall. Mater., 21(2014), No. 1, p. 12.
      [18]
      H.B. Zuo, C. Wang, J.J. Dong, K.X. Jiao, and R.S. Xu, Reduction kinetics of iron oxide pellets with H2 and CO mixtures, Int. J. Miner. Metall. Mater., 22(2015), No. 7, p. 688.
      [19]
      Z.L. Zhang, Q. Li, and Z.S. Zou, Reduction properties of high alumina iron ore cold bonded pellet with CO-H2 mixtures, Ironmaking Steelmaking, 41(2014), No. 8, p. 561.
      [20]
      T. Usui, M. Naito, T. Murayama, and Z. Morita, Kinetic analysis on gaseous reduction of agglomerates, Part 1, Reaction models for gaseous reduction of agglomerates, Tetsu-to-Hagane, 80(1994), No. 6, p. 431.
      [21]
      T. Murayama, T. Usui, M. Naito, and Y. Ono, Kinetic analysis on gaseous reduction of agglomerates, Part 2, Rate parameters included in the mathematical model for gaseous reduction of agglomerates, Tetsu-to-Hagane, 80(1994), No. 7, p. 493.
      • Relative Articles
      Cited By

    Catalog


    • /

      返回文章
      返回

      版权所有 ©《矿物冶金与材料学报（英文）》编辑部

      地址：北京市海淀区学院路30号邮政编码：100083

      电子邮箱：journal@ustb.edu.cn电话：+86-10-62332875

      本系统由 北京仁和汇智信息技术有限公司 开发    百度统计