Bachelor Thesis

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Hygienic assessment of surface, ground and drinking water in The Kharaa River Basin
(GMIT, 2018) Bolor-Erdene Ochirbold; Prof. Dr. Daniel Karthe; Dr. Ariuntuya, GMIT
The Kharaa river basin is ranked in the 5th of 29 river basins in terms of the economic importance and industrial production in Mongolia. However, this river basin has one of the smallest total area basins which is 26th of 29 river basins (1). As several research studies, there have been resulted that the Kharaa River Basin (KRB) is one of the highest populated river basins in Mongolia because of agricultural and industrial activities. Most drinking water source of inhabitants is provided by groundwater which is fed by KRB and livestock is mostly using surface water (2). Until recently, data on the hygienic quality of water resources in the KRB was limited and it was hardly found openly.
Determination of the preparation condition for the rare earth polymetallic ore of Khalzanburgedei
(GMIT, 2018) Munkhbaatar, Orgodol; Battsengel Baatar; Munkhjargal Chimeddorj; Janet Katzmarzyk
Rare earth metals are magic. The rare earth elements play key role in the expected growth of many emerging clean energy technologies. The next generation of wind and hydro power turbines, batteries, motors to power electric vehicles and fuel cells are example application. Moreover, the REE used for health, military defence and advanced communications including drug treatments,diagnostic techniques, MRI and visors protection, aircraft parts and GPS ,space based satellites and communication systems. Therefore, the developed countries are mostly used these elements. However, China are restricting rare earths exports to other countries because they are responsible for 97% global output. Therefore, I have chosen rare earth elements topic due to Mongolia has big number of resources and we could export our raw material to developed countries. We have interest to extract rare earth metals and exporting. Therefore, the rare earth metals study is developing in Mongolia
The copper oxide heap leaching of Erdenetiin-Ovoo deposit ore: The effect of particle size and residence time for copper recovery
(GMIT, 2018) Enkhjin Seded; Bayanmunkh Myagmarsuren; Munkhjargal Chimeddorj
The research continued from 27th of March till 10th of August. Samples were taken from dump of Erdenetiin Ovoo porphyry copper molybdenum deposit located in Orkon aimag of Mongolia that belongs to Achit-Ikht LLC. Achit-Ikht LLC has an operation of low grade ore dumps nowadays, but there is opportunity to increase leaching efficiency by heap leaching.
FROTH FLOTATION BEHAVIOR OF COKING COAL IN TAVAN TOLGOI DEPOSIT
(GMIT, 2018) Chinbayar Majaa; Munkhjargal Chimeddorj; Battsengel Baatar
Elongation of transfer chute service life on material perception
(GMIT, 2018) Temuulen Purevdorj; Gunther C. Stehr; Ariubolor, Purvee; Gurragchaa Tumur
This study has looked into wearing mechanism on liners in transfer chute used at Oyu Tolgoi mine. And it searched for ways to reduce wearing rate so that the mining operation could benefit in numerous ways. Wearing takes place dominantly in form of abrasive wear whose base is on micro-cutting mechanism. Worn liner samples made of Hardox 500 mark and a bag of coarse ore were provided for study purpose by the company. For referential purpose, the same intended steel marked as 110Г10Л was requisted and supplied from Erdenet Mine. After analytic analyses, it has been still believed that wearing rate advances as thickness of liners reduce. The conducted hardness test shows hardness gradient, emphasizing wear rate deviation. But microscopic analysis does not show much of evidence that wearing rate could be different over thickness. And heterogeneous wearing rate over liners was noted. The employed steel - (as producers state that martensite - bainitic structured) Hardox 500 for making liners, is known as the best selection for operation under high abrasive conditions.
Possibility of Alteration of the ore mechanical property for improvement of the transfer chute design problems
(GMIT, 2018) Tengisdulguun Tumenjargal; Ariunbolor Purvee; Ariunbold Puntsag
The mining industry has been expanding rapidly in Mongolia for last 2 decades. As a result, many problems are arising which require solutions from Mongolian engineers. Effectiveness and productivity of copper mining industry depend on appropriate actions and processes of various types of devices, techniques and machineries, which are used at mining sites. One of these important devices is a transfer chute.
ARSENIC MONITORING IN NALAIKH’S SURFACE WATERS PARTICULAR “BUS NUUR” LAKE
(GMIT, 2018) Sainsanaa Amarsanaa; Martin Knippertz; Daniel Karthe; Ariuntuya Tserendorj
Nalaikh is located in Ulaanbaatar, Mongolia, known for illegal mining activity. Earlier investigations concerned mining land disturbance and pointed on air, soil and importantly water. Which revealed in unexpected arsenic, which is a highly toxic element, exposure in the Bus Lake. The research is aimed to find seasonal and weather changes of the Bus Lake characteristics and indicating level of toxicity.
Development of selected routines (procedures) in the CAM post-processing for CNC Vertical Machining Centers
(GMIT, 2018) Tuguldur Tulga; Gunther C. Stehr; Batbayar Erdenee
CAD/CAM software are used for modelling and simulating. However, they are not enough for the CNC machines to manufacture a product. Here, the post-processing plays an important role customizing the CAD/CAM codes and making them understandable for the machine. It doesn‘t matter whether the CNC machine is modern or expensive, each machines need postprocessing to ensure the codes are optimum for the machines to operate at its finest.
Coking of Coal: Perspectives for Mongolia
(GMIT, 2018) Munkhtsetseg Amarjargal; Peter Vossen; Manfred J. Hampe
Mongolia is rich in coal, copper, rare earth, and gold ores. In the past 20 years, the Mongolian economy strongly relayed on the mining sectors. The mining industry contributed around onequarter to Mongolia’s gross domestic product in 2014. Unfortunately, this number is only a result of the export of the minerals as raw materials. No mining company produces the final product from an ore deposit in Mongolia. On the one hand it is a pity that Mongolia earns less income than what would be possible, but on the other hand, there is a free market waiting for companies to develop the mineral processing sector.
Transfer Chute Design Modification Using Discrete Element Method
(GMIT, 2018) Sukhbat Altangerel; Ariunbolor Purvee; Odbileg Norovrenchin; Gurragchaa Tumur
This bachelor work is aimed to modify currently operating transfer chute design with the help of bulk material simulation. The use of Discrete Element Method (DEM) allows the engineers to design and/or optimize bulk material handling facilities with the great precision.
parameters for cyanidation on sulfidic gold rich ore from Olon-Ovoot mine
(2018) Enerel Lkhagvadorj
The purpose of the research is to optimize parameters for cyanidation on sulfidic gold rich ore from Olon-Ovoot mine. Characteristic of ore has changed due to depth displacement. Therefore processing plant parameters had to be updated. Ore samples were grinded to 65%, 75% and 80% of -74μ and leached in 200ppm and 250ppm sodium cyanide solution which are the most suitable concentration range for sulfidic ore. As a result of the experiment, leaching 80% of -74μ ore in 250ppm NaCN solution for 32 hours was the optimal parameters for highest gold recovery which is 92.1%.
Assessment of ulaanbaatar air quality based on monitoring stations data
(GMIT, 2018-08-10) Anu-Ujin Sarantuya; Dr. Lodoysamba Sereeter; MSc. Guyen Battuvshin
This thesis assesses the air pollution data from twelve monitoring stations in Ulaanbaatar (UB). The measurements cover major six pollutants including Particulate Matters (PM10- all particles <10 µm and PM2.5- all particles <2.5 µm), Sulfur dioxide (SO2), Nitrogen dioxide (NO2), Carbon monoxide (CO) and Ozone (O3). The data obtained from open-source database named OpenAQ. Briefly, there are overall 15 monitoring stations in Ulaanbaatar, but 12 of them are connected to the OpenAQ source and each station’s data collected by 30-minutes range.
Development of road dust filter to be attached on a public bus in Ulaanbaatar
(GMIT, 2019) Baljinnyam Guntevsuren; Sungchil Lee; Odbileg Norovryenchin
This thesis work focused on road dust reduction in Ulaanbaatar by filtering. It searched for ways to reduce the airborne with the filter attached on public bus operated in Ulaanbaatar city. The road dust contains the PM10 and PM2.5 which are one of the dangerous materials in air pollution and can affect human health. The airflow around a public bus was simulated by ANSYS CFD software.
Analysis of Coal Combustion By-Products (CCBs) in Mongolia in Consideration of the Characteristics to be suitable for Backfilling and Securing of abandoned Small Scale Coal Mines
(GMIT, 2019) Khangai Gerelsukh; Peter Vossen; Martin Knippertz; Baasandorj Myagmarsuren; Temuulen Purevdorj
The research aimed to evaluate the possibility to use CCBs and industrial wastes for backfilling material for underground mines. Hundreds of thousand tons of CCBs in Mongolia is being landfilled despite its economical and beneficial properties. Following tests and analyses were made to evaluate CCBs and industrial wastes: sieve analysis, SEM analysis, radioactivity detection, moisture content analysis, XRF chemical content analysis, uniaxial compression test, elution test and FTIR analysis. Total of 9 CCBs and 1 electric-arc furnace slag from 7 different location/plant have been evaluated to represent Mongolian CCBs. Backfill mix designs were designed to compare the materials and to choose the best suited material for backfilling purpose.
Investigation of the Mine-ability of Mongolian Phosphate deposits in view of Economic and Environmental future prospects
(GMIT, 2019) Ganzorig Orosoo; Peter Vossen; Ch.Munkhjargal
From an environmental point of view, Compared to the 15 different origin of phosphate mining’s toxic metal concentrations, the Burenkhan first deposit content of arsenic is two times higher, lead 0.18 times lower,while uranium six times lower, and strontium is again 0.27 times lower. The biggest environmental problem is related to the phosphogypsum (PG) stacks. PG stacks usually contains heavy metals and metalloids. Furthermore, gypsum stacks are covering a lot of areas and it requires monitoring to avoid failure. There is some utilization of PG stacks to make good quality products by using advanced technology.
Identification of industrial waste liquids applicable for the suppression of mining and processing generated dust
(GMIT, 2019) Jargalmaa Olonbayar; Peter Vossen; Battsengel Baatar
The Industrial Revolution, which took place from the 18th to 19th centuries, was a period during which predominantly agrarian, rural societies became industrial and manufacturingdominated ones. Industrialization marked a shift to powered, special-purpose machinery, factories and mass production. Industrialization progressed by help of more and more natural resources to speed up productions.
Ambient and Outdoor Air Quality Study of Bayankhoshuu Residential district
(GMIT, 2019) Nomuun Batbaatar; Daniel Karthe; Gunther Stehr
This study was finished in cooperation with the Clean Air-Ger (GLEAR) project, led by Prof. Dr.-Ing Gunther Stehr, therefore data for this study is collected from the pilot area of GLEAR project which is located at the Baynkhoshuu Residential (Ger) district. This thesis assesses the indoor and outdoor air quality measurements produced by 3 different monitoring devices, DustTrack, Sensedge and online database (OpenAQ), and to reach a scientific evaluation on impacts and effects of ESP using that information.
Life Time Evaluation of Laser-Coated Pump Parts in the Mineral Processing Industry
(GMIT, 2019) Dulguun Narmandakh; Ariunbolor Purvee; Battulga Nasanjargal
This thesis aims to choose the best laser coating powder system among experimented materials and to estimate the useful life of specific laser coated pump parts. Slurry pumps in mineral processing are parts which erode away very quickly. Erosion is dominantly caused by abrasion from fine particles of the ore. Due to its cause, the process of erosion takes place on impeller blades and cover plates which have direct contact with the slurry
Determination of Deoxygenation Rate Constant for BOD Reaction in Mongolia
(GMIT, 2019) Sanchirgarav Batzorig; Ariuntuya Tserendor; Daniel Karthe
The objective of this study was to estimate the deoxygenation rate constant and the ultimate BOD of WWTP effluent in Mongolia. The deoxygenation rate was determined and tested in April, 2019. The Deoxygenation rate was 0.31 /day which is a bit higher than values from other countries. The ultimate BOD was in the range of 92- 115 mg /L. Biological oxygen demand values did not meet the limits recommended by the Mongolian National standard throughout entire study period.
Reducing of vibration influence on auger drilling rig (SBR-160A-24)
(GMIT, 2019) Batsuuri Dalainyam; Ariunbolor Purvee; Baljinnyam Erdenetsoo
The main objective of this work is to analyze the vibration, to find the sources and to examine for optimal solutions in SBR-160A-24 auger drilling rig. Design and modelling are based on result of this research work