Abstract
Experiments were carried out by adding CaF2 and NaF as catalysts in an Ar atmosphere to study the isothermal reduction kinetics of vanadium titano-magnetite carbon composite pellets under high temperature in the range from 1473 to 1673 K. The scanning electron microscope (SEM) was used to characterize the microstructure of product. By analyzing reduction mechanism, it was foundthat the rate controlling step was gas diffusion, and the activation energy was 178.39 kJ/mol without adding any catalysts. Adding CaF2 or NaF of 3% to vanadium titano-magnetite carbon composite pellets can decrease the apparent activation energy of reduction, and the decrease extent was 14.95 and 15.79 kJ/mol, respectively. In addition, temperature was an important factor influencing on reaction rate.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
ZHANG Guo-hua, YAN Zheng, FENG Ying-jie, et al. Reduction Kinetics of Vanadic Titano-Magnetite in Panzhihua [J]. Journal of the Chinese Rare Earth Society, 2008, 26: 210 (in Chinese).
HU Ke-jun, XI Gan, YAO Juan, et al. Status Quo of Manufacturing Techniques of Titanium of Titanium Slag in the World [J]. World Nonferrous Metals, 2006(12): 26.
XUE Xun. Research on Direct Reduction of Vanadic Tianomagetite [J]. Iron Steel Vandium Titanium, 2007, 28(3): 37 (in Chinese).
DENG Jun, XUE Xun, LIU Gong-guo. Current Situation and Development of Comprehensive Utilization of Vanadium-Bearing Titanomagnetite at Pangang [J]. Journal of Materials and Metallurgy, 2007, 6(2): 83 (in Chinese).
YANG Xue-min, GUO Zhan-cheng, WANG Da-guang, et al. Research on the Reduction Mechanism of Iron Ore Pellets Containing Graphite [J]. Engineering Chemistry and Metallurgy, 1995, 16(2): 118 (in Chinese).
YANG Xue-min, XIE Yu-sheng, WANG Da-guang, et al. Effect of CaO and CaCO3 on Reduction Rate of Iron Ore Pellets Containing Carbon [J]. Journal of Iron and Steel Research, International, 2000, 7(2): 1.
Zhou L H, Zeng F H. Reduction Mechanisms of Vanadium Titano-Magnetite-Non-Coking Coal Mixed Pellet [J]. Ironmaking and Steelmaking, 2011, 38(1): 59.
HAN Gui-hong, JIANG Tao, ZHANG Yuan-bo, et al. High-Temperature Oxidation Behavior of Vanadium, Titanium-Bearing Magnetite Pellet [J]. Journal of Iron and Steel Research, International, 2011, 18(8): 14.
GUO Xing-min, ZHANG Sheng-hi, FU Nian-xin, et al. Effects of Catalyst and Additive Containing Li, a, or Ca on Reduction of Iron Oxide/Carbon Composite Pellets [J]. Journal of University of Science and Technology Beijing, 2001, 8(3): 185.
Author information
Authors and Affiliations
Corresponding author
Additional information
Foundation Item: Item Sponsored by National Key Technology Research and Development Program of China (2008BAB32B05)
Rights and permissions
About this article
Cite this article
Zhang, Jl., Xing, Xd., Cao, Mm. et al. Reduction Kinetics of Vanadium Titano-Magnetite Carbon Composite Pellets Adding Catalysts Under High Temperature. J. Iron Steel Res. Int. 20, 1–7 (2013). https://doi.org/10.1016/S1006-706X(13)60048-5
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1016/S1006-706X(13)60048-5