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Research on reduction of Fe2O3 by biomass sawdust

  • Xiaoming Liu (刘晓明)
  • Honglei Zhang (张宏雷)
  • Suqin Li (李素芹)
  • Dongsheng Li (李东升)
  • Dongbo Huang (黄冬波)
Article
  • 52 Downloads

Abstract

The research on biomass reduction of Fe2O3 was carried out by using sawdust as reductant. The direct reducing agents in the biomass magnetization process were determined by comparing various biomass pyrolysis products with the reduction degree (divalent iron content in total iron), reduction temperature range and valence change of Fe2O3 in the reduction process. The microstructure variation of Fe2O3 at different stages was also analyzed by scanning electron microscopy (SEM). Nonisothermal thermogravimetric analysis (TGA) was applied to explore the thermal reduction process. The results show that the direct reducing substances in the biomass reaction with Fe2O3 are H2 and bio-oil, and the reduction process can be divided into two steps: biomass pyrolyzing to release H2 and bio-oil, and reductive volatiles reacting with Fe2O3. The two steps are relatively independent. The kinetic of the reduction reaction follows a first-order reaction kinetic model, with 88.99 kJ/mol activation energy and 9.55 × 108 min−1 frequency factor.

Keywords

biomass reduction Fe2O3 kinetics 

CLC number

TF 111.13 

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References

  1. [1]
    JIN H Q, YANG H. Status and problems of China’s iron ore imports and counter measures [J]. Globalization, 2014 (4): 96–106 (in Chinese).Google Scholar
  2. [2]
    YE H, SUN X L. Analysis of the current situation of iron ore import and its strategy [J]. Metal Mine, 2008 (9): 7–10 (in Chinese).Google Scholar
  3. [3]
    EL-GUINDY M I, DAVENPORT W G. Kinetics and mechanism of ilmenite reduction with graphite [J]. Metallurgical Transactions, 1970 (1): 1729–1734.CrossRefGoogle Scholar
  4. [4]
    FEINMAN J. Direct reduction and smelting processes [J]. Iron and Steel Engineer, 1999, 6(6): 75–77.Google Scholar
  5. [5]
    PISA I. Combined primary methods for NOx reduction to the pulverized coal-sawdust co-combustion [J]. Fuel Processing Technology, 2013, 106: 429–438.CrossRefGoogle Scholar
  6. [6]
    ZHANG H L, ZHU G C, YAN H, et al. Reduction of low-grade manganese dioxide ore pellets by biomass wheat stalk [J]. Acta Metallurgica Sinica (English Letters), 2013, 26(2): 167–172.CrossRefGoogle Scholar
  7. [7]
    FU J X, ZHANG C, HWANG W S, et al. Exploration of biomass char for CO2 reduction in RHF process for steel production [J]. International Journal of Greenhouse Gas Control, 2012, 8: 143–149.CrossRefGoogle Scholar
  8. [8]
    LUO S Y, YI C J, ZHOU Y M. Direct reduction of mixed biomass-Fe2O3 briquettes using biomassgenerated syngas [J]. Renewable Energy, 2011, 36: 3332–3336.CrossRefGoogle Scholar
  9. [9]
    GAN M, FAN X H, CHEN X L, et al. Reduction of pollutant emission in iron ore sintering process by applying biomass fuels [J]. ISIJ International, 2012, 52(9): 1574–1578.CrossRefGoogle Scholar
  10. [10]
    ZHANG M, YUAN Y C, LIU Y Z. Research on biomass waste combustion technologies [J]. Energy Research and Information, 2005, 21(1): 15–16 (in Chinese).Google Scholar
  11. [11]
    MUNIR S, DAOOD S S, NIMMO W, et al. Thermal analysis and devolatilization kinetics of cotton stalk, sugar cane bagasse and shea meal under nitrogen and air atmospheres [J]. Bioresource Technology, 2009, 100(3): 1413–1418.CrossRefGoogle Scholar
  12. [12]
    XU D, ZHU G C, CHI R, et al. Investigation on dephosphorization and magnetic separation of high phosphorous iron ore by biomass reduction roasting [J]. Metal Mine, 2010 (5): 68–76 (in Chinese).Google Scholar
  13. [13]
    WANG Y B, ZHU G C, CHI R, et al. An investigation on reduction and magnetization of limonite using biomass [J]. The Chinese Journal of Process Engineering, 2009, 9(3): 508–513 (in Chinese).Google Scholar
  14. [14]
    STREZOV V. Iron ore reduction using sawdust: Experimental analysis and kinetic modeling [J]. Renewable Energy, 2006, 31: 1892–1905.CrossRefGoogle Scholar
  15. [15]
    WU Y, FANG M, LAN L D, et al. Rapid and direct magnetization of goethite ore roasted by biomass fuel [J]. Separation and Purification Technology, 2012, 94: 34–38.CrossRefGoogle Scholar
  16. [16]
    COATS A W, REDFERN J P. Kinetic parameters from thermogravimetric data [J]. Nature, 1964, 201(4914): 68–69.CrossRefGoogle Scholar

Copyright information

© Shanghai Jiaotong University and Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Xiaoming Liu (刘晓明)
    • 1
    • 2
  • Honglei Zhang (张宏雷)
    • 1
  • Suqin Li (李素芹)
    • 1
  • Dongsheng Li (李东升)
    • 1
  • Dongbo Huang (黄冬波)
    • 1
  1. 1.School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijingChina
  2. 2.Beijing Key Laboratory of Green Recycling and Extraction of MetalsUniversity of Science and Technology BeijingBeijingChina

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