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Metallurgist
Published in: Metallurgist 7-8/2018

15-11-2018

Effect of Charge Basicity of Two Compositions on MnO Reduction During Smelting Ferromanganese

Authors: D. Mwana Bute Ngoy, M. Kalenga wa Kalenga, M. Tangstad

Published in: Metallurgist | Issue 7-8/2018

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Abstract

The effect of basicity of two different basic charges for reduction of MnO by solid carbon during smelting ferromanganese is considered. The effect of different charge compositions on MnO reduction in the temperature range 1400–1500°C is considered. Experiments are performed in a thermogravimetric furnace in the presence of CO at atmospheric pressure. X-ray spectral fluorescence analysis (XRF) of final slags is conducted with the aim of determining the degree of MnO reduction in relation to charge composition and temperature. It is established that MnO reduction depends strongly on temperature, and charge properties apparently affect reduction insignificantly.
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Literature
1.
B. Sorensen, S. Gaal, M. Tangstad, et al., “Properties of manganese ores and their change in the process of calcination,” in: Proc. 12th Int. Ferroalloys Congr. Sustainable Future, Helsinki, Finland. June 6–9 (2010), pp. 439–448.
2.
O. Ostrovski, S. E. Olsen, M. Tangstad, and M. Yastreboff, “Kinetic modelling of MnO reduction from manganese ore,” Can. Inst. of Mining, Metallurgy and Petroleum, 41, No. 3, 309–318 (2002).
3.
G. Tranell, S. Gaal, D. Lu, et al., “Reduction kinetics of manganese oxide from HC FeMn slags,” in: Proc. INFACON XI (2007), pp. 231–240.
4.
M. Tangstad, The High Carbon Ferromanganese Process-Coke Bed Relations, Dr Ing. Dissertation. NTH, Trondheim, Norway (1996).
5.
J. R. De Oliveira, E. A. Vieira, D. C. R. Espinosa, and J. A. S. Tenorio, “Influence of temperature, basicity and particle size on MnO reduction,” Mater. Trans., 52, No. 6, 1200–1205 (2011).CrossRef
6.
S. E. Olsen, M. Tangstad, and T. Lingstad, Production of Manganese Ferroalloys, SINTEF & Tapir Academic Press. Trondheim (2007).
7.
S. E. Olsen and M. Tangstad, “The importance of slag basicity in the production of high carbon ferromanganese,” in: Proc. 53rd Electric Furnace Conf. (Orlando, Fl. Nov. 12–15, 1995), Orlando (1995), pp. 93–98.
8.
H. Cenginzler and R. H. Eric, Silicon and Manganese Partition Between Slag and Metal Phases and Their Activities Pertinent to Ferromanganese and Silicomanganese Production, The Minerals, Metals & Materials Society. Seattle, USA (2016).
9.
V. Olsø, M. Tangstad, and S. Olsen, “Reduction kinetics of MnO saturated slags,” in: Proc. INFACON 8, Beijing, China (1998), pp. 279–283.
Metadata
Title
Effect of Charge Basicity of Two Compositions on MnO Reduction During Smelting Ferromanganese
Authors
D. Mwana Bute Ngoy
M. Kalenga wa Kalenga
M. Tangstad
Publication date
15-11-2018
Publisher
Springer US
Published in
Metallurgist / Issue 7-8/2018
Print ISSN: 0026-0894
Electronic ISSN: 1573-8892
DOI
https://doi.org/10.1007/s11015-018-0705-z

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