Hai-bin Zuo, Cong Wang, Jie-ji Dong, Ke-xin Jiao, and Run-sheng Xu, Reduction kinetics of iron oxide pellets with H2 and CO mixtures, Int. J. Miner. Metall. Mater., 22(2015), No. 7, pp.688-696. https://dx.doi.org/10.1007/s12613-015-1123-x
Cite this article as: Hai-bin Zuo, Cong Wang, Jie-ji Dong, Ke-xin Jiao, and Run-sheng Xu, Reduction kinetics of iron oxide pellets with H2 and CO mixtures, Int. J. Miner. Metall. Mater., 22(2015), No. 7, pp.688-696. https://dx.doi.org/10.1007/s12613-015-1123-x

Reduction kinetics of iron oxide pellets with H2 and CO mixtures

Author Affilications
Funds: 

This work was financially supported by the National Natural Science Foundation of China (Nos. 51104014 and 51134008).

  • Reduction of hematite pellets using H2-CO mixtures with a wide range of H2/CO by molar (1:0, 3:1, 1:1, 1:3, and 0:1) at different reducing temperatures (1073, 1173, and 1273 K) was conducted in a program reducing furnace. Based on an unreacted core model, the effective diffusion coefficient and reaction rate constant in several cases were determined, and then the rate-control step and transition were analyzed. In the results, the effective diffusion coefficient and reaction rate constant increase with the rise in temperature or hydrogen content. Reduction of iron oxide pellets using an H2-CO mixture is a compound control system; the reaction rate is dominated by chemical reaction at the very beginning, competition during the reduction process subsequently, and internal gas diffusion at the end. At low hydrogen content, increasing temperature takes the transition point of the rate-control step to a high reduction degree, but at high hydrogen content, the effect of temperature on the transition point weakens.
  • Related Articles

    [1]Xudong Mao, Pritesh Garg, Xiaojun Hu, Yuan Li, Samik Nag, Saurabh Kundu, Jianliang Zhang. Kinetic analysis of iron ore powder reaction with hydrogen–carbon monoxide [J]. International Journal of Minerals, Metallurgy and Materials, 2022, 29(10): 1882-1890. DOI: 10.1007/s12613-022-2512-6
    [2]Ying-yi Zhang, Wei Lü, Xue-wei Lü, Sheng-ping Li, Chen-guang Bai, Bing Song, Ke-xi Han. Isothermal reduction kinetics of Panzhihua ilmenite concentrate under 30vol% CO-70vol% N2 atmosphere [J]. International Journal of Minerals, Metallurgy and Materials, 2017, 24(3): 240-248. DOI: 10.1007/s12613-017-1401-x
    [3]Ru-fei Wei, Da-qiang Cang, Ling-ling Zhang, Yuan-yuan Bai. Staged reaction kinetics and characteristics of iron oxide direct reduction by carbon [J]. International Journal of Minerals, Metallurgy and Materials, 2015, 22(10): 1025-1032. DOI: 10.1007/s12613-015-1164-1
    [4]Jie Dang, Guo-hua Zhang, Xiao-jun Hu, Kuo-chih Chou. Non-isothermal reduction kinetics of titanomagnetite by hydrogen [J]. International Journal of Minerals, Metallurgy and Materials, 2013, 20(12): 1134-1140. DOI: 10.1007/s12613-013-0846-9
    [5]Xin-guo Si, Xiong-gang Lu, Chuan-wei Li, Chong-he Li, Wei-zhong Ding. Phase transformation and reduction kinetics during the hydrogen reduction of ilmenite concentrate [J]. International Journal of Minerals, Metallurgy and Materials, 2012, 19(5): 384-390. DOI: 10.1007/s12613-012-0568-4
    [6]Qing-jun Zhou, Jin-xu Li, Wu-yang Chu. Effect of hydrogen on the friction and wear of Ni-P coatings [J]. International Journal of Minerals, Metallurgy and Materials, 2010, 17(2): 241-245. DOI: 10.1007/s12613-010-0221-z
    [7]Qian Li, Kuangdi Xu, Kuochih Chou, Xionggang Lu, Qin Lin. Kinetics of hydrogen absorption and desorption of a mechanically milled MgH2+5at%V nanocomposite [J]. International Journal of Minerals, Metallurgy and Materials, 2006, 13(4): 359-362. DOI: 10.1016/S1005-8850(06)60074-1
    [8]Xingqiao Ma, Sanqiang Shi, Senyang Hu, Chungho Woo, Longqing Chen. Modeling of hydrogen diffusion process at a blunt notch in zirconium [J]. International Journal of Minerals, Metallurgy and Materials, 2005, 12(5): 416-421.
    [9]Hengda Zhang, Changchun Sun, Shude Yao, Weizhong Tang, Fanxiu Lu. Hydrogen distribution in CVD diamond films prepared by DC arcjet operating at gas recycling mode [J]. International Journal of Minerals, Metallurgy and Materials, 2002, 9(6): 441-443.
    [10]Zhongji Li, Jinxu Li, Wuyang Chu, Hui Liu, Lyie Qiao. Molecular Dynamics Simulation and Experimental Proof of Hydrogen-enhanced Dislocation Emission in Nickel [J]. International Journal of Minerals, Metallurgy and Materials, 2002, 9(1): 59-64.

Catalog

    Share Article

    Article Metrics

    Article views (335) PDF downloads (34) Cited by()

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return