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invest for classifier ball mill project in mongolia

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ATO Gold and Silver Project Dornod, Mongolia

The ATO property is located within the Tsagaan Ovoo soum territory in Dornod, Eastern Mongolia. It lies approximately 660km east of the capital city of Ulaanbaatar and 38km west of Tsagaan Ovoo soum. The project is situated in the mining licence MV 017111, which covers an area of 5,492.63ha. The property lies within the Mongol Okhotsk tectonic collage of the Devonian to Late Jurassic age. The tectonic collage is emplaced along the North Asian Craton . The local geology features metamorphosed Devonian age sedimentary rocks overlain by a sequence of Permian era volcanic and sedimentary rocks. The sequence also includes remnant scraps of Jurassic age volcanoclastic units, intruded by Jurassic plutons.

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The proven and probable mineral reserves at the ATO and Mungu deposits were estimated at 26.4 million tonnes grading 1.14g/t gold, 11.18g/t silver, 0.46% lead and 0.78% zinc, as of June 2021.

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The ATO mine is operated as a conventional open pit mine with drilling, blasting, and truck and shovel operations. The mining fleet includes rigid body mining trucks, hydraulic excavators, and wheel loaders. The project has two mining areas, namely the ATO and Mungu deposits. The Mungu pit will be explored and mined under phase two. Open at depth, the pit can be mined economically using open pit methods only for a small portion. The feasibility study suggests the implementation of underground operations to extract ore from the remaining areas of the Mungu pit, upon exhausting the open pit reserves. The underground potential of the pit needs to be proved through further studies, though.

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The ATO processing facility in phase one has a capacity of leaching 1.2 million tonnes per annum of oxide ore at an average grade of 1.13g/t gold at a recovery rate of 70% and an average grade of 9.25g/t silver at 40% recovery. The run of mine ore undergoes three stage crushing in a primary jaw crusher, secondary cone crusher, and an optional tertiary cone crusher operating in a closed circuit with a final product screen. The crushed ore is transferred to the heap leach facility to produce a pregnant leach solution , which is introduced into the carbon adsorption circuit. The loaded carbon from the adsorption circuit is acid washed to remove calcium, sodium salts, magnesium, silica, and fine iron particles. A modified ZADRA elution process is used to remove the adsorbed gold from the loaded carbon. The pregnant solution flows through one of two electrowinning cells with gold plated knitted mesh steel wool cathodes. The loaded cathodes are power washed to remove the...

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Phase two is intended to increase gold production while also producing saleable zinc, lead and pyrite concentrates. A crushing circuit with a capacity of 2.2Mtpa will be installed. The ROM ore will undergo three stage crushing to reduce the material from an F100 of 800mm to a P80of 10mm. The grindingcircuit will include a primary ball mill arranged in a closed circuit with a classification screen in the first stage. The second stage of the grinding circuit will include a secondary ball mill in a closed circuit with hydrocyclones. The flotation process will involve separate circuits for lead, zinc and pyrite concentrates. The concentrate products from each of the circuits will undergo compressed air filtration to produce a dewatered dry filter cake, which will be stockpiled.

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The ATO gold and silver property can be accessed from Ulaanbaatar by highway to Choibalsan, the capital of the Dornod Province, and then by an improved unpaved road to Tsagaan Ovoo soum. A mining campat the project site can accommodate 300 personnel. The 2.4MW power supply required for the phase one mining and processing operations is supplied using 3512B diesel power generators having a maximum power generation capacity of 3.6MW. A hybrid solution diesel renewable power plant is also proposed to be constructed.

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Steppe Gold secured a loan worth $59.7m through the Gold 2 National Program of the Government of Mongolia in November 2021. The loan was facilitated through the Central Bank of Mongolia. An agreement was also made for a $5m working capital loan from the Trade and Development Bank of Mongolia . Both the loans will be used to accelerate the phase two construction works.

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The October 2021 feasibility study was led by DRA Global , an engineering, project delivery, and operations management group headquartered in Australia. DRA was responsible for the studies related to mine planning, mineral reserve estimate, metallurgy, as well as capital and operating cost estimation. GeoRes was responsible for the mineral resource estimation while global consulting firm Knight Piésold provided the design of tailings facilities. The hydrogeology, water quality, and environmental resource management studies were performed by Ulzii Environmental . Steppe Gold engaged Mongolian professional services and equipment supplier Euro Khan to conduct a technical study for the potential development of a hybrid renewable energy system for the mine. Barloworld Mongolia is the supplier of heavy equipment parts and power systems. Chinese chemical company Hebei Chengxin provides cyanide for the project while Dow Chemical Mongolia supplies other reagents.

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Oyu Tolgoi Project, in South Gobi Desert, Mongolia

Oyo Tolgoi is being developed in two phases, with the first phase involving Oyut open pit mine, a concentrator, and supporting infrastructure. The first concentrate from the open pit operations was produced in December 2012, with the first shipment made in July 2013. As of July 2018, the open pit mine was estimated to have exported approximately four million tonnes of concentrate to China. Development agreement for the Oyu Tolgoi underground was signed in May 2015, followed by the projects financial closure in December 2015. It comprises the Hugo Dummett deposit consisting of the Hugo North and Hugo South, and the Heruga deposits. The phase 2 construction began in May 2016, with first production from the underground mine anticipated by the end of 2021. Construction of two of the total five shafts planned for the underground mine was completed as of October 2019. The two completed shafts include the primary production shaft , while the construction of Shafts...

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Turquoise Hill secured a £3.4bn finance facility for the Oyo Tolgoi underground development from a group of lenders, in December 2015. The lenders group includes 15 commercial banks and international financial institutions, and export credit agencies representing the governments of Canada, the US, and Australia. The lenders also agreed to provide a supplementary debt of $1.6bn for the project.

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Located within 8,496ha wide mining license, the Oyu Tolgoi project is situated approximately 550km from Ulaanbaatar, the capital city of Mongolia. Geology comprises of lower to mid Paleozoic metasediments and island arc basalts resting upon a lower Palaeozoic ophiolite complex. Felsic to mafic igneous rocks are abundant in the area with few outcrops and two major drainages flowing through the property. The deposits extend for over a 26km strike length in the form of copper gold porphyry and related high sulphidation copper gold style deposit. Mineralisation is identified in contorted milky white quartz veins formed in the basalt formation as well as on small quartz monzodiorite dykes. Oyu Tolgoi LLC holds the Hugo North Extension copper gold deposit and majority of the Heruga copper gold molybdenum deposit in a joint venture wuth Entrée. Oyu Tolgoi holds 80% stake in the Entrée/Oyu Tolgoi JV property, while the remaining 20% is held by Entrée.

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The total proven and probable mineral reserves at Oyo Tolgoi are estimated to be 1,450 million tonnes of ore, graded at 0.86% copper, 0.3 grams per tonne of gold, and 1.97g/t of silver. The project is expected to contain 24,037 million lbs of copper, 10.59 million ounces of gold, and 74.88Moz of silver.

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The Oyut open pit is mined using conventional shovel truck operation involving drilling, loading, and haulage of mined ore. A combination of 34m3 diesel hydraulic shovels and 56m3electric rope shovels will be used along with 290t haul trucks. Underground panel/block caving method will be used to mine the Hugo North, Hugo South, and Heruga deposits. Initial mining will begin at Hugo North, which contains highest grade copper and gold in its first three panels. Mined material will be transported to surface via road trains and conveyed to the run of mine stockpile nearby the concentrator facility. Ore is currently processed at the conventional semi autogenous grinding mill / ball mill / grinding circuit . It will be slurried, grinded in SAG, and forwarded to the ball mills operating in closed circuit with cyclones. The cyclone overflow is conveyed to the flotation circuit, followed by cleaning to obtain a final grade concentrate. The cleaned concentrate is thickened,...

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The project can be accessed from major unpaved roads connecting Ulaanbaatar as well as from nearby town across the Chinese border. It is also located close to the proposed South Gobi Rail alignment, while air access is available from the Khanbumbat airport. Inner Mongolia Power International Cooperation is currently supplying the power needed for the project through Mongolian national power transmission grid. A 300MW power plant is also proposed to be built near the Tavan Tolgoi coalfields to supply electricity to the mine. Raw water and process water required by the project will be sourced through pipes from the Gunii Hooloi basin, located to the north of the Oyu Tolgoi site. Workers are currently accommodated at two on site camps, namely Oyut and Manlai. Tailings will be stored at the existing tailings storage facility located approximately 5km from the processing plant. Major infrastructure available onsite includes internal access roads, power supply system, intake...

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Oyu Tolgoi LLC submitted a feasibility study for the proposed Tavan Tolgoi power plant project to the Government of Mongolia in February 2020. The 300MW coal fired power plant is estimated to cost £712m . The proposed plant is expected to supply domestically sourced power to the Oyu Tologi mine by June 2023.

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In July 2010, Flour received a contract valued $1bn for overall program management along with the engineering, procurement, construction, and management of some portions of the Oyu Tolgoi mining complex. OreWin prepared the technical report for the Oyo Tolgoi project on behalf of Turquoise Hill Resources in 2016. The Entrée/Oyu Tolgoi JV engaged Amec Foster Wheeler for preparing the NI 43 101 Technical Report for the Oyu Tolgoi project.

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