Abstract
A new method of magnesium production was proposed that using a mixture of calcined dolomite and calcined magnesite as raw materials with the molar ratio of MgO to CaO was 6:1 by vacuum aluminothermic reduction. The reduction process was studied by thermodynamic analysis and X-ray diffraction analysis of reduction residue. The reaction of reduction process was CaO+6MgO+4Al=CaO•2Al2O3+6Mg. The effect of briquetting pressure, reduction temperature, time and CaF2 (MgF2) on reduction ratio of MgO was investigated. And the reduction residue that the main phase of CaO•2Al2O3 was leached in alkaline solution for producing sodium aluminateme raw material for special alumina. The results show that the reduction ratio is increased with increasing of the temperature, time, briquetting pressure in range from 40 to 100 MPa and addition of CaF2 or MgF2 in range from 0 to 3%. The alumina leaching ratio of reduction residue reached 88% at the conditions of leaching temperature 95 °C and the concentration ratio of Na2CO3 to NaOH was 100:75 in leaching solution.
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References
D. Eliezer, E. Aghion, F.H. Froes, “Magnesium Science, Technology and Applications”, Advanced Performance Materials, 5 (1998), 201–212.
G. Hanko, H. Antrekowitsch, P. Ebner, “Recycling Automotive Magnesium Scrap”, JOM, 2 (2002), 51–54.
IM. Morsi, K.A. Elbarawy, M.B. Morsi et al., “Silicothermic Reduction of Dolomite Ore Under Inert Atmosphere”, Canadian Metallurgical Quarterly, 1 (2002), 15–28.
D. Minic, D. Manasijevic, J. Dokic et al., “Silicothermic reduction process in magnesium production”, Journal of Thermal Analysis and Calorimetry, 2 (2008), 411–415.
G. C. Holywell, “Magnesium: The First Quarter Millennium”, JOM, 7 (2005), 26–33.
W.-X. Hu, J. Liu, N.-X. Feng, “Analysis of New Vacuum Reduction Process in Magnesium Production”, Non-ferrous Mining and Metallurgy, 4 (2010), 40–42.
F. Gao, Z.-R. Nie, Z.-H. Wang et al., “Environmental Assessment of Energy Usage Strategies for Magnesium Production Using the Pidgeon Process”, Journal of Beijing University of Technology, 6 (2008), 646–650.
S.-Y. Yan, “The current status and analysis of making magnesium by means of Pidgeon Process in China”, Light Metals, 6 (2005), 37–40.
J.R Wynnyckyj, L. M. Pidgeon, “Equilibria in the Silicothermic Reduction of Calcined Dolomite”, Metallurgical transactions B, 2 (1971), 979–986.
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© 2011 TMS (The Minerals, Metals & Materials Society)
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Hu, Wx., Feng, Nx., Wang, Yw., Wang, Zh. (2011). Magnesium Production by Vacuum Aluminothermic Reduction of a Mixture of Calcined Dolomite and Calcined Magnesite. In: Sillekens, W.H., Agnew, S.R., Neelameggham, N.R., Mathaudhu, S.N. (eds) Magnesium Technology 2011. Springer, Cham. https://doi.org/10.1007/978-3-319-48223-1_11
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DOI: https://doi.org/10.1007/978-3-319-48223-1_11
Publisher Name: Springer, Cham
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