PROPHYLACTIC APPROACH TO SOLVING ENVIRONMENTAL PROBLEMS OF THE MINING INDUSTRY IN LINKAGE WITH ENERGY CONSUMPTION Alexander Brodt Eco-Safe Mining Corp., 510 Reeves Drive, Grand Forks, ND 58201, USA Corresponding author: alexander.brodt@gmail.com ABSTRACT. Existing technologies for developing ore deposits lead to irrational energy costs for delivering empty rock as part of the ore to the surface, while the content of ...

MULTIBODY SIMULATION OF A JAW CRUSHER Peter Eitz, Thomas Zinke, Holger Lieberwirth Institute for Mineral Processing Machines and Recycling Systems Technology, TU Bergakademie Freiberg, Lampadiusstraße 4, Freiberg, Germany; E-mail: Peter.Eitz@iart.tu-freiberg.de Corresponding author: Peter.Eitz@iart.tu-freiberg.de ABSTRACT. A jaw crusher is one of the most important machines in the field of hard material crushing and is used in the processing industry. This paper ...

BIOLOGICAL LEACHING OF NON-FERROUS METALS FROM COPPER SLAG USING A STRAIN OF SILICATE-SOLUBILISING BACTERIA Plamen Georgiev, Marina Nicolova, Irena Spasova University of Mining and Geology “St. Ivan Rilski”, 1700 Sofia; E-mail: ps_georgiev@mgu.bg Corresponding author: ps_georgiev@mgu.bg ABSTRACT. This study aims at the recovery of non-ferrous metals from pyrometallurgy copper slag enriched in diopside, fayalite, and protomangano-ferro-anthophyllite and containing 0.36 ...

 INVESTIGATION OF THE COMPOSITION AND STRUCTURE OF WAELZ SLAG Angel Iliev1, Nikolai Gogov1, Daniela Grigorova1, Gyunver Hodjaoglu2 1 University of Chemical Technology and Metallurgy, 8 Kl. Ohridsky blvd., 1756 Sofia, Bulgaria; E-mail: d.dimitrova@uctm.edu 2 Institute of Physical Chemistry “Acad. R. Kaischew”, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., block 11, 1113 Sofia; E-mail: gyunver@ipc.bas.bg Corresponding author: d.dimitrova@uctm.edu ABSTRACT. Waelz ...

INTEGRATION OF SMFC-BASED BIOSENSOR IN CONSTRUCTED WETLAND FOR REAL TIME MONITORING AND BIOREMEDIATION OF HEAVY METALS CONTAMINATED WATERS Rosen Ivanov, Petia Genova, Katerina Nikolova, Anatoliy Angelov University of Mining and Geology “St. Ivan Rilski”, 1700 Sofia; E-mail: r.ivanov@mgu.bg Corresponding author: r.ivanov@mgu.bg ABSTRACT. Water contaminated with heavy metals is one of the most serious environmental problems in the world. ...

OPTIMISATION AND KINETIC STUDIES ON SILVER LEACHING FROM WASTE PRINTED CIRCUIT BOARDS IN SELECTED GREEN SOLVENTS Abubakar Osafo Kantanka, Benetta Koomson, Emmanuel Mensah Azogba Department of Materials Engineering, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana; E-mail: mateng@gmail.com Corresponding author: abubakarosafo11@gmail.com ABSTRACT. Organic acids are being explored as biodegradable lixiviants for extracting valuable metals from various sources with ...

MAGNETIC NANOPARTICLE-ASSISTED REMEDIATION OF PETROLEUM-CONTAMINATED SOILS Alexandre Loukanov 1 Laboratory of Engineering NanoBiotechnology, Department of Eng. Geoecology, University of Mining and Geology “St. Ivan Rilski”, Sofia, Bulgaria, E-mail: a.loukanov@mgu.bg 2 Department of Chemistry and Materials Science, National Institute of Technology, Gunma College, 580 Toriba, Maebashi, Gunma 371-8530 Japan, E-mail: loukanov@gunma-ct.ac.jp ABSTRACT: Petroleum contamination in soils, often resulting from mining ...

DEVELOPMENT OF RENEWABLE ENERGY IN UKRAINE, CURRENT STATE AND POSSIBLE SOLUTIONS Olha Medvedieva1, Zariana Halchenko1, Oleksii Demchenko2 1 M. S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine, Dnipro, UA; E-mail: medvedevaolga1702@gmail.com; zhalchenko85@gmail.com 2 Ukrainian State University of Science and Technologies: Dnipro, UA; E-mail: fiatdem4enko@gmail.com Corresponding author: medvedevaolga1702@gmail.com ABSTRACT. The article analyses the current state ...

SCREENING AND ANALYSIS OF THE APPLICABILITY OF VARIOUS TECHNOLOGIES FOR REDUCING SULPHATE CONCENTRATION IN WATERS INFLUENCED BY THE MINING AND PROCESSING INDUSTRY Katerina Nikolova, Svetlana Bratkova, Anatoliy Angelov, Petia Genova, Rosen Ivanov, Polina Velichkova University of Mining and Geology “St. Ivan Rilski”, Sofia, e-mail: k.nikolova@mgu.bg ABSTRACT. The complexity and specificity of the problem with the release of high ...

DEVELOPMENT OF TECHNOLOGY FOR PROCESSING UKRAINIAN NICKEL ORES Tаtуana Oliynyk, Liudmyla Skliar Kryvyi Rih National University, 11 Vitalii Matusevych Str., Kryvyi Rih, 50027, Ukraine Email: taoliynik@knu.edu.ua, lyuda.cuclina@knu.edu.ua Corresponding author: taoliynik@knu.edu.uсa ABSTRACT. The study investigates material composition of silicate nickel ores from Zakhidno-Lashchivka area in Ukraine. Mineralogical analysis is carried out on nontronite and ochreous samples. Correlation analysis examines the relationship ...

OPTIMISATION OF KAOLIN DEPOSIT MODELING USING GEOSTATISTICAL METHODS OF SPATIAL INTERPOLATION Ihor Piskun, Lesia Sitsinska, Roman Ihnatiuk State University “Zhytomyr Polytechnic”, 10005 Zhytomyr, E-mail: ihor@ztu.edu.ua, lesly311878@gmail.com, krrkp_irm@ztu.edu.ua Corresponding author: ihor@ztu.edu.ua ABSTRACT. The paper presents a comprehensive approach to optimising kaolin deposit modelling using geostatistical methods of spatial interpolation. The study focuses on improving the assessment of the spatial distribution ...

DETERMINATION OF THE RESISTANCES IN THE ROTOR’S COILS OF A MINE LOCOMOTIVE MOTOR Angel Zabchev, Romeo Alexandrov University of Mining and Geology “St. Ivan Rilski”, Sofia 1700 Corresponding author: romeo.alexandrov@mgu.bg Abstract: A possibility has been found for determining the resistances in a loop that cannot be disconnected, by measuring with an ohmmeter. Such loops form the rotor windings of ...