Improvement of Oxidizing Roasting of Molybdenite Concentrate by Addition of Magnesite
D. P. KHOMOKSONOVA1, E. S. KASHKAK2, I. G. ANTROPOVA1
1Baikal Institute of Nature Management, Siberian Branch, Russian Academy of Sciences, Ulan-Ude, 670047 Russia
2Tuva State University, Kyzyl, 667000 Russia
Keywords: молибденитовый концентрат, магнезит, термодинамическое моделирование, обжиг, молибдат магния, сульфат магния, molybdenite concentrate, magnesite, thermodynamic modeling, roasting, magnesium molybdate, magnesium sulfate
Abstract
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 water- and 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.
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