Improvement of Oxidizing Roasting of Molybdenite Concentrate by Addition of Magnesite
- 2 Downloads
The results of the thermodynamic modeling are presented for oxidizing roasting of refractory molybdenite (MoS2) with magnesite (MgCO3). The phase and chemical compositions of the MoS2–MgCO3–O2 system and its changes are determined depending on the temperature and quantity of the additive agent. The modeling reveals feasibility of thermochemical decomposition of molybdenite with the formation of waterand soda-soluble compounds MgMoO4 and MgSO4, which is an evidence of efficiency of magnesium carbonate in the capacity of an additive agent. The optimal conditions of the thermochemical decomposition of molybdenite determined theoretically from thermodynamic calculations are proved experimentally.
KeywordsMolybdenite concentrate magnesite thermodynamic modeling roasting magnesium molybdate magnesium sulfate
Unable to display preview. Download preview PDF.
- 1.Zelikman, A.N. and Meerson, G.A., Metallurgiya redkikh metallov (Rare Metal Metallurgy), Moscow: Metallurgiya, 1973.Google Scholar
- 3.Amer, A.M., Hydrometallurgical Recovery of Molybdenum from Egyptian Qattar Molybdenite Concentrate, Physicochem. Probl. Min. Proc., 2011, vol. 47, no. 14, pp. 105–112.Google Scholar
- 5.Vatolin, N.A., Khalezov, B.D., Kharin, E.I., and Zelenin, E.A., Review of Ways to Process Molybdenite Concentrates and Search for an Ecologically Friendly Process, GIAB, 2011, no. 12, pp. 170–175.Google Scholar
- 6.Khalezov, B.D., Kharin, E.I., Vatolin, N.A., and Zelenin, R.A. RF Patent no. 2536615, Byull Izobret., 2014, no. 36, p. 7.Google Scholar
- 11.Vladimirov, L.P., Termodinamicheskie raschety ravnovesiya metallurgicheskikh reaktsii (Thermodynamic Calculations of Metallurgical Reaction Equilibrium), Moscow: Metallurgiya, 1970.Google Scholar
- 12.Belov, E.G. and Trusov, B.G., Termodinamicheskoe modelirovanie khimicheski reagiruyushchikh system (Thermodynamic Modeling of Chemically Reacting Systems), Moscow: MGTU, 2013.Google Scholar