Browsing by Author "Temuulen Purevdorj"

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    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.
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    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.