Erdenet Mining Corporation

Erdenet, Mongolia

Erdenet Mining Corporation

Erdenet, Mongolia
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Kavalieris I.,Plus Minerals LLC | Khashgerel B.-E.,Plus Minerals LLC | Morgan L.E.,U.S. Geological Survey | Undrakhtamir A.,Erdenet Mining Corporation | Borohul A.,Erdenet Mining Corporation
Economic Geology | Year: 2017

The Early to Middle Triassic Erdenet porphyry Cu-Mo deposit, in northern Mongolia, developed in a continent- continent arc collision zone, within the Central Asian orogenic belt. The porphyry system is related to multiple intrusions of crystal-crowded biotite granodiorite porphyry, which formed a composite stock about 900 m in diameter, with multiple porphyritic microgranodiorite dikes. Wall rocks are Late Permian to Early Triassic, medium-grained granodiorite, with similar whole-rock geochemistry, mineralogy, and composition to the granodiorite porphyry. Whole-rock analysis of the granodiorite porphyry and wall rocks shows that these rocks cannot be discriminated, but both have depleted middle heavy rare earth elements and Y, typical of fertile porphyry magmatic suites. At the current pit level (1,250 m elev), early porphyry-style quartz veins (A and B type) are locally infilled by pyrite-chalcopyrite, with subordinate bornite, but most of the chalcopyrite occurs in D veins that constitute more than 50% of the Cu grade (∼0.5 wt % Cu). The 0.3 wt % Cu shell resembles a molar tooth, enveloping the granodiorite porphyry, with deeper roots extending down the wal-rock contacts. Molybdenite occurs in monomineralic veins, and in finely laminated to massive quartz-molybdenite veins. The most important alteration is quartz-muscovite, which occurs as relatively coarse (100-500 μm) alteration selvages (1-5 cm) that envelop D veins. The D veins cut illite ± kaolinite-smectite (or intermediate argillic) alteration. Intermediate argillic alteration, together with abundant pink anhydrite (commonly hydrated to gypsum), extends from at least 1,300- to 900-m elevation in the deepest drill holes, and has overprinted early potassic alteration, or relatively unaltered red granodiorite. Meter-wide zones of kaolinite cut the anhydrite-gypsum at all levels. There is an abrupt transition outward from the intermediate argillic alteration to chlorite-epidote (propylitic) alteration, at 50 to 200 m from the granodiorite porphyry contact, although D veins (and chalcopyrite) extend outward to the propylitic zone. The Erdenet porphyry system, was overprinted by advanced argillic alteration, which outcrops 2 km northwest of the pit, and forms a lithocap that extends over 10 × 2.5 km. It is characterized by residual quartz, andalusite, Na-Ca and K-alunite, diaspore, pyrophyllite, zunyite, topaz, dickite, and kaolinite. The upper part of the porphyry Cu-Mo deposit (removed by mining), comprised a bornite-chalcocite enriched zone up to 300 m thick with an average grade of 0.7 wt % Cu and up to 5 wt % Cu locally. Based on hypogene bornite-chalcocite mineral textures and high-sulfidation state mineralogy, the enriched zone is inferred to be of hypogene origin, but modified by supergene processes. Consequently, it may be related to formation of the lithocap. Previous Re-Os dates of 240.4 and 240.7 ± 0.8 Ma for molybdenite in quartz veins are comparable to new 40Ar/39Ar dates of 239.7 ± 1.6 and 240 ± 2 Ma for muscovite that envelops D veins. One 40Ar/39Ar date on K-alunite from the lithocap of 223.5 ± 1.9 Ma suggests that it may be about 16 m.y. younger than Erdenet, but this result needs to be verified by further dating. © 2017 Society of Economic Geologists, Inc.

Otgoyn B.,Mongolian University of Science and Technology | Tsedenkh T.,Erdenet Mining Corporation | Munkhbayar L.,Erdenet Mining Corporation
Tsvetnye Metally | Year: 2017

Content of valuable mineral in any final product or concentrate, obtained by concentration, is one of the most important indicators, defining its quality. Copper concentrate is mainly obtained by flotation from copper-porphyric ores. Concentration efficiency depends on ore genesis, grain shapes and mineral composition. During ore mining on deposit, the mineral composition and type of rocks are changed. The deposit subsurface consists of primary sulfide ores, containing pyrite, chalcopyrite, molybdenite, hypogene bornite and chalcocite. Information about these ore characteristics allows the choice of the optimal concentration technology and reagent mode of concentrate obtaining, corresponding to the quality standards. Detail investigation of copper content in bulk concentrate is very important for the control of metal content in copper concentrate. We designed the metal content in the bulk concentrate of Erdenet Mining Corporation and defined the conditions of high-quality concentrate obtaining, using mathematical method. We also defined the function of metal content dependence on 4 variables (consumption of collectors AEPO-MX and BK-901; part of primary and oxidated minerals). We offered the linear model and carried out its assessment by least-square technique. The analysis defined the factors, effecting the quality of bulk concentrate. According to this, copper content in bulk concentrate may be therafter planed. Recommended costs of collectors AEPO-MX and BK-901, and results of investigations at these conditions are given. Copper extraction in bulk concentrate 87.1% (with its content 15.1%) was found with minimal flotation time 2.73 min.

Turbat S.,Erdenet Mining Corporation
8th International Forum on Strategic Technology 2013, IFOST 2013 - Proceedings | Year: 2013

Industrial processes are characterized by the necessity for variation and optimization of the process to achieve satisfactory products and to achieve the most efficient and economic method of production. This calls for the need to control the flow rates of materials throughout the plant so that the most satisfactory condition can be achieved against the many plant variables. During past 10 years Erdenet Mining Corporation has been considerable progress on the development of Variable Speed Electrical drives and these are now proven to be very reliable and economic. It is, therefore, now necessary to reassess the methods used to achieve the variable flow and optimization of industrial processes. This paper is aimed at explaining the energy and costs benefits which can be obtained by using AC induction motors and 3 tariff energy systems for this purpose. Also automatic control system influences on energy saving and reliablity. © 2013 IEEE.

Morozov V.,National University of Science and Technology "MISIS" | Ganbaatar Z.,Erdenet Mining Corporation | Delgerbat L.,Erdenet Mining Corporation | Stoliarov V.,JSC Elscort'
Engineering Optimization IV - Proceedings of the 4th International Conference on Engineering Optimization, ENGOPT 2014 | Year: 2014

The processes of flotation of copper-molybdenum ores are characterised by significant fluctuations of all input, output and intermediate parameters. Instability and non-optimal parameters of flotation cause between 3% to 6% losses of the valuable component. Under these conditions it is difficult to make and apply deterministic mathematical models of processes. However, the use of multi-level adaptive models allows considerable optimisation of the technological processes. When managing the flotation, the principle of forward-looking estimation of the grade of ore is used. While the system is operating, analyses of the ore in the X-ray and visible spectrum are used as input data. At the “Erdenet” processing plant, a new method and system for advanced diagnostics of ore has been developed and tested, based on visible and the X-ray fluorescence analysis of elemental composition and a video-image analyser of mineral composition. Algorithm of mineral processing process control includes operation monitoring of composition and physicochemical parameters of ore and pulp, mathematic modeling and preliminary estimation of processed ore grade, calculation and control of reagent dosing by ore grade. The application of modern systems of automatic control at the processing plant of Erdenet Mining corporation (Mongolia) helped increase the recovery of copper and molybdenum. © 2015 Taylor & Francis Group, London.

VANCOUVER, BC / ACCESSWIRE / March 1, 2017 / Prophecy Development Corp. ("Prophecy" or the "Company") (TSX: PCY, OTC PINK: PRPCF, FSE: 1P2N) is pleased to invite shareholders and investors to the following presentations and receptions to be held at the Metro Toronto Convention Center: Sunday, March 5, 2017 2:00pm to 7:30pm Mongolia: For stability, unlocking the potential Location: Room 206D "Organized by Mongolia's Ministry of Mining and Heavy Industry, in partnership with Mongolian and foreign invested exploration and mining companies, the event will focus on: Mongolia's investment climate and specific actions to strengthen it; Mongolia's untapped exploration potential; and exciting Mongolian discoveries, projects and investment opportunities." Tuesday, March 7, 2017 8:00am to 12:00pm Bolivia is a country of great mining tradition Location: Room 205D "Organizer: Ministry of Mining and Metallurgy of Bolivia, Public Companies and Private Companies Bolivia has important mineralogical reservoirs to be explored, transformed and industrialized with minerals like zinc, silver, lead, tin, gold, semi-precious and precious stones as well as lithium and iron deposits ranking among the first in the world. We are a country making progress, with a steady growth economy, generating ample opportunities for investment, offering security and juridical stability. The Bolivian presentation will be attended by the Minister of Mining and Metallurgy, the highest authority of the mining and metallurgy sector, who will present a wide outlook of the economy and mining in Bolivia, investment opportunities in mining projects and the current regulatory framework for foreign investors, accompanied by technical expositions of public institutions on the potential of the different mining projects in the country. Private companies will present their experience in the development of successful mining activities in Bolivia and its perspectives." During the above session, you can meet one-on-one with Prophecy management and get real-time updates on Prophecy's projects in Bolivia (Silver, Zinc and Lead), Mongolia (Coal and Power), and Canada (Vanadium and Titanium). Further to the Company's news release dated December 28, 2016, Prophecy is pleased to announce that it has successfully delivered on schedule, a total of 16,000 tonnes of coal from the Company's existing Ulaan Ovoo coal stockpiles in Mongolia to Erdenet Mining Corporation (for 10,000 tonnes) and Selenge Energo Heat Plant (for 6,000 tonnes). Coal sales and deliveries continue weekly to smaller regional heat plants and are expected to conclude at the end of March. In addition, the Company continues its preparations for mining at Pulacayo and Paca, with Q2 2017 as the target production start date. The work will include detailed mine plans, staffing, a concentrate off-take agreement, a toll milling agreement, equipment leasing, and project financing. A positive production decision would not be based on a feasibility study of mineral reserves demonstrating economic and technical viability so would carry increased uncertainty and the risk of failure. Prophecy Development Corp. is a Canadian public company listed on the Toronto Stock Exchange that is engaged in developing mining and energy projects in Mongolia, Bolivia and Canada. Further information on Prophecy can be found at PROPHECY DEVELOPMENT CORP. ON BEHALF OF THE BOARD For more information about Prophecy, please contact Investor Relations: Neither the Toronto Stock Exchange nor its Regulation Services Provider (as that term is defined in the policies of the Toronto Stock Exchange) accepts responsibility for the adequacy or accuracy of this release. Certain statements contained in this news release, including statements which may contain words such as "expects," "anticipates," "intends," "plans," "believes," "estimates," or similar expressions, and statements related to matters which are not historical facts, are forward-looking information within the meaning of applicable securities laws. Such forward-looking statements, which reflect management's expectations regarding Prophecy's future growth, results of operations, performance, business prospects and opportunities, are based on certain factors and assumptions and involve known and unknown risks and uncertainties which may cause the actual results, performance, or achievements to be materially different from future results, performance, or achievements expressed or implied by such forward-looking statements. These factors should be considered carefully, and readers should not place undue reliance on the Prophecy's forward-looking statements. Prophecy believes that the expectations reflected in the forward-looking statements contained in this news release and the documents incorporated by reference herein are reasonable, but no assurance can be given that these expectations will prove to be correct. In addition, although Prophecy has attempted to identify important factors that could cause actual actions, events or results to differ materially from those described in forward looking statements, there may be other factors that cause actions, events or results not to be as anticipated, estimated or intended. Prophecy undertakes no obligation to release publicly any future revisions to forward-looking statements to reflect events or circumstances after the date of this news or to reflect the occurrence of unanticipated events, except as expressly required by law.

Pestryak I.,Moscow Mining University | Morozov V.,Moscow Mining University | Baatarhuu J.,Erdenet Mining Corporation
International Journal of Mining Science and Technology | Year: 2013

The authors present the results of analysis of material composition and experimental investigations of acid and biohydrometallurgical leaching of middlings on grain size, pH level, leaching process duration, temperature and slurry density. The rational parameters of flotation and acid-bacterial leaching of middlings providing an efficient release of valuable components from mineral complexes and recovery to flotation concentrate and leaching solution have been determined. A combined flowsheet and a beneficiation process for bulk flotation middlings of copper-molybdenum ore have been suggested, which include middlings grinding, sulfide minerals flotation, bacterial leaching of sulfide flotation tailings, liquid-phase extraction of dissolved copper and electrolysis of re-extraction eluates. The suggested combined method of cleaning of middlings of copper-molybdenum ores beneficiation provides the total copper recovery increase by 0.8% with a reduction of the cost price of saleable material by 0.5%. © 2013 Published by Elsevier B.V. on behalf of China University of Mining & Technology.

Ganbaatar Z.,Erdenet Mining Corporation | Nazarov Yu.P.,Scientific and Production Association RIVS JSC | Polyanskiy M.V.,Scientific and Production Association RIVS JSC
Non-ferrous Metals | Year: 2013

The concentration plant of Erdenet Mining Corporation (Mongolia) has been successfully exploiting the two-stage scheme of concentration of copper-molybdenum ores during 30 years. This scheme includes three consecutive stages: bulk cycle, finishing cycle and molybdenum cycle. Considering the manufacturing reconstruction process, one of landmark components is the formation of technological schemes with the following substantiation of the scheme of apparatuses' series. The task for the operating manufactures became more complex, because of the necessity of adaptation of the developed scheme of apparatuses' series to the existing production spaces. For example, the schemes of apparatuses' series are considerably rigid structures, created for the specific type of supplied raw materials. At the same time, increasing of productivity of existing enterprises foreordains the involving of ores, supplied from various parts of ore body, into the synchronous processing. These ores differ by the content of mineral resources, ratio of primary and secondary minerals, oxidation level, slags content, etc. All these factors provide the creation reasonability of schemes with increased technological flexibility, which makes possible rather efficient responding on the changing of properties of the delivered raw materials. © Ganbaatar Z., Nazarov Yu. P., Polyanskiy M. V., 2013.

Zimin A.V.,RIVS Science and Production Association | Nazarov Yu.P.,RIVS Science and Production Association | Sharav G.,Erdenet Mining Corporation
Gornyi Zhurnal | Year: 2014

Technogenic mineral formations are actually a nonconventional source of minerals. Various origination and diversity of composition of aged tailings as well as high content of oxidized component give zero favor to customization of engineering designs on treatment of aged tailings at given processing plants due to low production data. Therefore it is preferred to deal with actual tailings, considering drastic alteration of phase composition of aged tailings. Tailings go to dumping after a number of process stages, including aftertreatment, so, it is possible to choose some process units the discharge of which can be used as the feedstock for stand-alone process stages. As a whole, mineral composition and dissociation ability of sulphides are the advantage factors for the development of copper and molybdenum concentrate technologies. Taking into account features of mineral dissociation, the sequence of process stages below seems most rational: Separation of molybdenum, copper and pyrite in sodium sulphide medium; Regrinding of molybdenum circuit tailings to dissociate intergrown pieces of copper minerals; Copper flotation composed of three scavenging operations; Pyrite concentrate production from copper flotation tailings. This approach is implemented in processing of aftertreatment tailings in dressing of Erdenet copper-molybdenum deposit ore (Mongolia). The marketable concentrates produced meet the standard quality requirements.

Nazarov Yu.P.,RIVS Science and Production Association | Zimin A.V.,RIVS Science and Production Association | Gezegt Sh.,Erdenet Mining Corporation
Eurasian Mining | Year: 2015

Tailings of complex ore processing plants using bulk-selective flotation chart are composed of a number of products. Metal content of final concentration tailings is comparable with the metal content of initial ore, thus, these tailings can be a resource supply for processing plants. The article describes the approach to selecting processing circuits and using their tailings as a feed for independent process stages. At such process stages, it is possible to either produce bulk concentrates for blending with some other products of a processing plant, or to arrange self-sustained production of marketable concentrates. The implementation of the approach at a copper-molybdenum ore processing plant is instantiated. The developed flow chart allows production of quality copper, molybdenum and pyrite concentrates. The authors also describe the approach to estimating processibility of tailings of process stages. It is shown that it is feasible to select some process stages in the flotation flow chart and use their tailings as a feed for independent processing. This approach is actualized in the final concentration cycle of dressing of Erdenet copper-molybdenum ore (Mongolia). The technology of production of quality marketable copper, molybdenum and pyrite concentrates has been developed. © Nazarov Yu. P., Zimin A. V., Gezegt Sh., 2015.

Vasiliyevna P.I.,Moscow State Mining University | Ochir E.,Erdenet Mining Corporation | Valentinovich M.V.,Moscow State Mining University
Obogashchenie Rud | Year: 2013

In return water systems at ore-dressing facilities it is essential to increase reclaim water purification and conditioning efficiency. With that, related waste water of complex chemical composition should also be used. A thermodynamic analysis was performed with respect to chemical processes of copper ions interaction with other components of waste and return water liquid phase with a view to determine conditions required for copper ions and other components efficient recovery from waste water by means of precipitation. It is shown, that a condition for maintaining copper ions concentration in filtrates at an acceptable treatment level is provision of filtrate pH within the range from 5.6 to 7.3. A technology for joint conditioning of seepage water together with municipal purification works water and Power Plant ash-disposal area effluent water was recommended for Erdenet operation. Testing was performed confirming efficiency of the chosen regime and return water system, providing for nonchemical return water treatment. The tests results showed a possibility for copper and molybdenum recovery increase into marketable concentrate by 0.35 and 0.5 %, respectively. In addition to that, copper concentrate grade was increased by 0.4 % and that of molybdenum concentrate - by 0.5 %.

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