Kinetics Analyzing of Direction Reduction on Manganese Ore Pellets Containing Carbon

Bo Zhang, Zheng-Liang Xue

Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan, China.

DOI: 10.4236/ijnm.2013.23017                

Abstract

Using high temperature carbon tube furnace, reduction of manganese ore pellets containing carbon was investigated. The reaction was divided into two stages at five minutes after reaction, and the kinetics model of reduction process was established. The experimental results showed that, the reaction rate in the earlier stage was controlled by the chemical reactions between FeO, MnO and carbon reductant, and the activation energy was 28.85 KJ/mol. In the later stage, as the carbon reductant replaced by CO, the reaction rate was controlled by CO-diffusing in solid products, and the cor- responding activation energy was 86.56 KJ/mol. Reaction rate of the later stage was less than the earlier one.

Keywords

Kinetics Model; Manganese Ore Pellets Containing Carbon; Self-Reduction

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	L. Z. Shan, et al., “Industrialization of a New Steelmaking Process Utilizing Hot Metal Pretreatment and Smelting Reduction,” Iron & Steel, Vol. 2, 1988, pp. 64-71.
[2]	A. M. H. Jin, “Improvement of Mn Yield in Less Slag Blowing at BOF by Use of Sintered Ore,” Iron & Steel, Vol. 8, 1993, pp. 45-51.
[3]	R. S. Li, Y. M. Feng and G. Z. Wei, “Application of Poor Manganese Ore in the Converter Steelmaking Process,” Steelmaking, Vol. 20, No. 1, 2004, pp. 13-15.
[4]	Z. L. Meng and X. U. Yang, “Discussion on Manganese Alloyed in Top-Blown Converter,” Laiwu Steel Technology, Vol. 4, No. 8, 2002, pp. 33-35.
[5]	Z. L. Xue, Y. Yu, W. Wang, et al., “Steelmaking Process with Manganese Oxide Composite Mass of Direct Alloying by the Combined Blowing Converter,” Invention Patent: ZL201010245102.1.
[6]	S. L. Liu and C. G. Bai, “Kinetics of Vanadium-Titanium Iron Concentrate Pellets Containing Carbon Direct Reduction,” Journal of iron and Steel Research, Vol. 4, No. 23, 2011, pp. 5-8.
[7]	W. Jander, “Reactions in the Solid State at High Temperatures,” Zeitschrift für Anorganische und Allgemeine Chemie, Vol. 163, No. 1-2, 1927, pp. 1-30. doi:10.1002/zaac.19271630102
[8]	A. M. Ginstling and V. I. Brounshtein, “Concerning the Diffusion Kinetics of Reactions in Spherical Particles,” J. Appl. ChcilL USSR, Vol. 23, 1950, pp. 1327-1338.
[9]	K. C. Chou, Q. Li, Q. Lin, et al., “Kinetics of Absorption and Desorption of Hydrogen in Alloys Powder,” International Journal of Hydrogen Energy, Vol. 30, 2005, pp. 301-309. doi:10.1016/j.ijhydene.2004.04.006
[10]	H. W. Cheng and X. G. Lu, “Reduction Kinetics Mechanism of Carbon Containing Pellets,” Chinese Journal of Rare Earths, Vol. 8, No. 26, 2008, pp. 103-108.