OBTAINING OF AMMONIUM ORTOMOLYBDATE FROM
ERDENET LLC MOLYBDENUM CONCENTRATE
*A.Sarnai1, P.Munkhbaatar1, J.Oyunaa2
1School of Applied Sciences, Mongolian University of Science and Technology, Ulaanbaatar, Mongolia
(* sarnail_1999@yahoo.com)
2School of Mining and Geology, Mongolian University of Science and Technology, Ulaanbaatar, Mongolia
ABSTRACT
The molybdenum mining process used at Mongolia Erdenet Company is a selective flotation of molybdenite from the copper porphyry ores in which the extraction of molybdenum comes as a byproduct of the ongoing copper production.
The mineralogical composition of molybdenum concentrate is 99.4% molybdenite (MoS2), 0.09% molybdenum oxide (MoO3), 0.52% powellite (CaMoO4) and wulfenite (PbMoO4) and content 47.76-47.92% molybdenum, 1.5-2.67% copper, 0.04% renium.
From compared solvents sodium and carbonate and ammonia are like extracted molybdenum than hydrochloric acid, which contained 96.23-97.72 p.c. of its total amount. Hence to take into consideration abundance, cheap and suitable for analysis and processing the molybdenum concentrate ammonia is chose as a basic solvent.
By direct evaporation of ammonia extract solution we obtained ammonium ortomolybdate, which contains 73.47% MoO3.
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