2014-Sustainable Industrial Processing Summit
SIPS 2014 Volume 2: Mineral Processing
| Editors: | Kongoli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2014 |
| Pages: | 446 pages |
| ISBN: | 978-1-987820-04-1 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Research on receiving some compounds of molybdenum from a molibdenite concentrate
Sarnai Altantsetseg1;1MONGOLIAN UNIVERSITY OF SCIENCE AND TECHNOLOGY, Ulaanbaatar, Mongolia;
Type of Paper: Regular
Id Paper: 63
Topic: 2
Abstract:
Molybdenum mine is spread on the territory of Mongolia in the main form of copper-molybdenum ore, and there were found rich deposits like Erdenet, Tsagaan-Suvarga and Oyu-tolgoi. The molybdenum mining process used at Mongolia Erdenet Company.Ltd 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 experimental technological procedures and analysis were performed on the molybdenum concentrate of Erdenet. 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 Mo 47.76-47.92%, Cu 1.5-2.67%, Re-0.04%. After mechano-chemical activation, the oxidized burning temperature of Mo-concentrate decreased from 5500C to 450-5000C and burning time decreased from 2 hour to 1 hour. The optimal regime for the calcium molybdate precipitation from molybdenum ammonium solution: pH= 9, temperature 400C and the result of X-ray is suited to chemical pure calcium molybdate. The optimal regime for molybdenum acid crystallization: pH=2, time is 6-7 hours. By direct evaporation of ammonia extract of molybdenum concentrate, we obtained ammonium par molybdate, which contains 73.47% MoO3.