Abstract
The calcination and the reduction behaviors of a low-grade manganese ore by methane was studied at 973 K to 1273 K by several techniques. The onset temperatures of thermal decompositions of pyrolusite and calcite phases for this ore were found to be 868 K and 1056 K, and the rates of decompositions are obtained as 1.4 × 10−3 s−1 and 1.53 × 10−3 s−1, respectively. Because of the presence of manganese in the goethite structure of the ore, the goethite decomposition resulted in higher degrees of decomposition and magnetite formation at the studied temperature range. The exothermic reduction of manganese oxides to MnO started prior to the reduction of the coexisting iron oxides, and the apparent activation energy of reduction of Mn3O4 to MnO was determined. The reduction of manganese oxides resulted in CO2 gas release due to the reaction of H2O with the carbon supplied via methane cracking. Although manganese oxide minerals of the ore were not carburized at the experimental conditions, the manganese associated with iron oxides was carburized to cementite ((Fe,Mn)3C), and it was accompanied with CO gas release. Higher rates and extents of manganese oxides reduction were obtained with increase in temperature; however, the simultaneous formation of manganese silicates was more favorable at higher temperatures and hindered complete reduction.
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N. Anacleto, O. Ostrovski, and S. Ganguly: ISIJ international, 2004, vol. 44, pp. 1480–87.
J. Adanez, L.F. de Diego, F. Garcia-Labiano, P. Gayan, A. Abad, and J.M. Palacios: Energy & Fuels, 2004, vol. 18, pp. 371–77.
R. Eric, A. Bhalla, P. Halli, and P. Taskinen: Solid state Reduction of Iron, Manganese and Chromium Oxide Ores with Methane, in Applications of Process Engineering Principles in Materials Processing, Energy and Environmental Technologies. 2017, Springer. pp. 307–18.
A. Bhalla and R.H. Eric: INFACON XIV, 2015, vol. 1, pp. 461–69.
O. Ostrovski and G. Zhang: AIChE Journal, 2006, vol. 52, pp. 300–10.
N. Anacleto, O. Ostrovski, and S. Ganguly: ISIJ International, 2004, vol. 44, pp. 1615–22.
R. Elliott, K. Coley, S. Mostaghel, and M. Barati: JOM, 2018, vol. 70, pp. 680–90.
O. Ostrovski: The Use of Natural Gas for Reduction of Metal Oxides: Constraints and Prospects, in Celebrating the Megascale. 2014, Springer. pp. 529–36.
H. Dalaker and P. Tetlie: Decomposition of Methane During Oxide Reduction with Natural Gas, in Celebrating the Megascale. 2014, Springer. pp. 537–46.
K. Ohla and H. Grabke: Materials and Corrosion, 1982, vol. 33, pp. 341–46.
B. Liu, Y. Zhang, Z. Su, Z. Peng, G. Li, and T. Jiang: JOM, 2017, vol. 69, pp. 1669–75.
G. Akdogan and R.H. Eric: Metallurgical and Materials Transactions B, 1995, vol. 26, pp. 13–24.
B. Liu, Y. Zhang, Z. Su, M. Lu, G. Li, and T. Jiang: Powder Technology, 2018, vol. 325, pp. 271–79.
E.E. Sileo, M. Alvarez, and E.H. Rueda: International Journal of Inorganic Materials, 2001, vol. 3, pp. 271–79.
R. Cornell and R. Giovanoli: Clays and Clay Minerals, 1987, vol. 35, pp. 11–20.
W. Stiers and U. Schwertmann: Geochimica et Cosmochimica Acta, 1985, vol. 49, pp. 1909–11.
M.S.S. Silva, M.M.F. Lima, L.M. Graça, and R.M.F. Lima: International Journal of Mineral Processing, 2016, vol. 150, pp. 54–64.
H. Liu, T. Chen, X. Zou, C. Qing, and R.L. Frost: Thermochimica Acta, 2013, vol. 568, pp. 115–21.
T. De Bruijn, T. Soerawidjaja, W. De Jongt, and P. Van Den Berg: Chemical Engineering Science, 1980, vol. 35, pp. 1591–99.
H.E. Barner and C.L. Mantell: Industrial & Engineering Chemistry Process Design and Development, 1968, vol. 7, pp. 285–94.
N. El-Hussiny, H.H.A. El-Gawad, F. Mohamed, and M. Shalabi: International Journal of Scientific & Engineering Research, 2015, vol. 6, pp. 339–46.
B. Sorensen, S. Gaal, E. Ringdalen, M. Tangstad, R. Kononov, and O. Ostrovski: International Journal of Mineral Processing, 2010, vol. 94, pp. 101–10.
L. Zhou, L.R. Enakonda, S. Li, D. Gary, P. Del-Gallo, C. Mennemann, and J.M. Basset: Journal of the Taiwan Institute of Chemical Engineers, 2018, vol. 87, pp. 54–63.
R. Ishak: Reaction Kinetics for Reduction of Manganese Ore with Carbon Monoxide in the Presence of Carbon, ISBN: 82-471-5528-1, in Department of Materials Science and Engineering. 2002, Norwegian University of Science and Technology, Trondheim.
Y. Nasiri, M. Panjepour, and M. Ahmadian: International Journal of Mineral Processing, 2016, vol. 153, pp. 17–28.
Acknowledgments
This study has been done in the laboratories at NTNU and SINTEF, and the support from both institutes is acknowledged. This work has been supported by the Research Domain 2 in SFI-Metal production; a Norwegian Centre for Research-Based Innovation.
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Manuscript submitted October 5, 2018.
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Cheraghi, A., Yoozbashizadeh, H., Ringdalen, E. et al. Kinetics and Mechanism of Low-Grade Manganese Ore Reduction by Natural Gas. Metall Mater Trans B 50, 1566–1580 (2019). https://doi.org/10.1007/s11663-019-01574-4
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DOI: https://doi.org/10.1007/s11663-019-01574-4