Obtaining of ammonium ortomolybdate from erdenet llc molybdenum concentrate

OBTAINING OF AMMONIUM ORTOMOLYBDATE FROM

ERDENET LLC MOLYBDENUM CONCENTRATE
*A.Sarnai¹, P.Munkhbaatar¹, J.Oyunaa^2
1School of Applied Sciences, Mongolian University of Science and Technology, Ulaanbaatar, Mongolia

(* [e-mail])
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.