RESEARCH ON THE MANUFACTURING MAGNESIUM FROM THANHHOA DOLOMITE BY PIDGEON PROCESS
Abstract
The magnesium and magnesium alloys has applied widely in different industrial aspects in Vietnam in the modern life. Especially, the products from magnesium alloys implementing in the automotive have increased rapidly since the car elements tend to be generated by the light alloys in order to save the fuel. However, in the current time, Vietnam has no factories to produce the magnesium to adapt the domestic demand although it owns an enrich resource of raw materials. This research indicates the possibility of using the dolomite ore in Thanhhoa – Vietnam to make the magnesium as well as evaluate the primary factors like recovering temperature, reducing agent rate, recovering time having effect on the reduction efficiency of Thanhhoa dolomite by metallothermic method in vacuum (Pidgeon Process). This is basic process, low investment and suitable for the small and medium scales in Vietnam. The experiment includes heating, indicating the chemical ingredients and recovering experiment on the dolomite after calcination (dolime) by using ferrosilicon. The thermodynamic model is created to estimate the recovering efficiency in the Pidgeon. The result shows that the CaO/MgO molar ratio of calcination dolomite in Thanhhoa is nearly 1.5 which is suitable to produce magnesium in the case of highly-required efficiency and pureness. Besides, the result from the furnace of the experiment is lower than the one in the model. The samples are set up to check the influence of the rate of ferrosilicon in the compound. The result indicates that the ideal efficiency reaches 85 % with 30 % ferrosilicon. Moreover, the study confirms that the optimal operating conditions in this process are recovering during three hours at 1200 °C and 100 Pa pressure. This result proves the potential application of Thanhhoa dolomite in the industry suitable with the current condition in Vietnam
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References
Kainer, K. U. (2016). Challenges for Implementation of Magnesium into More Applications. Magnesium Technology 2016, 5–6. doi: https://doi.org/10.1007/978-3-319-48114-2_1
Brooks, G., Cooksey, M., Wellwood, G., Goodes, C. (2007). Challenges in light metals production. Mineral Processing and Extractive Metallurgy, 116 (1), 25–33. doi: https://doi.org/10.1179/174328507x163733
Mineral commodity summaries 2015 (2015). U.S. Geological Survey. doi: https://doi.org/10.3133/70140094
Wang, Y., You, J., Peng, J., Di, Y. (2016). Production of Magnesium by Vacuum Aluminothermic Reduction with Magnesium Aluminate Spinel as a By-Product. JOM, 68 (6), 1728–1736. doi: https://doi.org/10.1007/s11837-016-1865-6
Bugdayci, M., Turan, A., Alkan, M., Yucel, O. (2018). Effect of Reductant Type on the Metallothermic Magnesium Production Process. High Temperature Materials and Processes, 37 (1), 1–8. doi: https://doi.org/10.1515/htmp-2016-0197
Zang, J. C., Ding, W. (2013). The Pidgeon Process in China and Its Future. Magnesium Technology 2001, 7–10. doi: https://doi.org/10.1002/9781118805497.ch2
Cherubini, F., Raugei, M., Ulgiati, S. (2008). LCA of magnesium production. Resources, Conservation and Recycling, 52 (8-9), 1093–1100. doi: https://doi.org/10.1016/j.resconrec.2008.05.001
Habashi, F. (1997). Handbook of Extractive Metallurgy. Vol. 2. Wiley, 2379.
Halmann, M., Frei, A., Steinfeld, A. (2008). Magnesium Production by the Pidgeon Process Involving Dolomite Calcination and MgO Silicothermic Reduction: Thermodynamic and Environmental Analyses. Industrial & Engineering Chemistry Research, 47 (7), 2146–2154. doi: https://doi.org/10.1021/ie071234v
Toguri, J. M., Pidgeon, L. M. (1962). High-temperature studies of metallurgical processes: Part II. The thermal reduction of calcined dolomite with silicon. Canadian Journal of Chemistry, 40 (9), 1769–1776. doi: https://doi.org/10.1139/v62-271
Chieu, L. T. (2017). Final report: Research and manufacture of metal magnesium from Vietnam magnesite ore by vacuum method. Ministry of Industry and Trade.
Chen, M., Zhao, B. J., Chen, Y. H., Han, F. L., Wu, L. E. (2017). Reaction Mechanisms in the Silicothermic Production of Magnesium. The Minerals, Metals & Materials Series, 239–249. doi: https://doi.org/10.1007/978-3-319-51091-0_22
Wang, Y.-W., Zhao, K., Peng, J.-P., Di, Y.-Z., Li, Y.-L., Song, Y., Deng, X.-Z. (2014). Process of producing magnesium by thermal vacuum reduction using silicocalcium as reductant. Rare Metals, 35 (7), 571–575. doi: https://doi.org/10.1007/s12598-014-0321-4
Wang, C., Zhang, C., Zhang, S. J., Guo, L. J. (2015). The effect of CaF2 on the magnesium production with silicothermal process. International Journal of Mineral Processing, 142, 147–153. doi: https://doi.org/10.1016/j.minpro.2015.04.017
Bale, C. W., Bélisle, E., Chartrand, P., Decterov, S. A., Eriksson, G., Gheribi, A. E. et. al. (2016). FactSage thermochemical software and databases, 2010–2016. Calphad, 54, 35–53. doi: https://doi.org/10.1016/j.calphad.2016.05.002
Stull, D. R., Prophet, H. (1971). JANAF thermochemical tables, second edition. NSRDS. doi: https://doi.org/10.6028/nbs.nsrds.37
Barin, I. (1993). Thermochemical data of pure substances. Vol. I. Weinheim Germany: VCH Verlagsgesellschaft mbH.
Eriksson, G., Wu, P., Pelton, A. D. (1993). Critical evaluation and optimization of the thermodynamic properties and phase diagrams of the MgO-Al2O3, MnO-Al2O3, FeO-Al2O3, Na2O-Al2O3, and K2O-A12O3 systems. Calphad, 17 (2), 189–205. doi: https://doi.org/10.1016/0364-5916(93)90019-8
Wulandari, W., Rhamdhani, A., Brooks, G., Monaghan, B. J. (2009). Distribution of impurities in magnesium via silicothermic reduction. Proceedings of European Metallurgical Conference. Innsbruck, 1401–1415.
Han, J.-W., Baek, U.-H., Lee, B.-D., Lee, K.-W., Han, G.-S. (2016). Study of the Thermal Reduction Behavior of Dolomite by the Pidgeon process. Korean Journal of Metals and Materials, 54 (2), 104–112. doi: https://doi.org/10.3365/kjmm.2016.54.2.104
Mehrabi, B., Abdellatif, M., Masoudi, F. (2012). Evaluation of Zefreh Dolomite (Central Iran) for Production of Magnesium via the Pidgeon Process. Mineral Processing and Extractive Metallurgy Review, 33 (5), 316–326. doi: https://doi.org/10.1080/08827508.2011.601478
Pidgeon, L. M., Alexander, W. A. (1944). Thermal Production of Magnesium Pilot plant Studies on the Retort Ferrosilicon Process. Transaction of the AIME, 159, 315–351.
Yucel, O., Yiğit, S., Derin, B. (2005). Production of Magnesium Metal from Turkish Calcined Dolomite Using Vacuum Silicothermic Reduction Method. Materials Science Forum, 488-489, 39–42. doi: https://doi.org/10.4028/www.scientific.net/msf.488-489.39
Wynnyckyj, J. R., Tackie, E., Chen, G. (1991). The Problem of Limited Recoveries in the Pidgeon Process for Magnesium Production. Canadian Metallurgical Quarterly, 30 (3), 139–143. doi: https://doi.org/10.1179/cmq.1991.30.3.139
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