Phuong Thao Dang1, Van Thao Le2 1 Hanoi University of Mining and Geology, 18 Vien Street, Duc Thang Ward, Bac Tu Liem District, Hanoi, Vietnam; E-mail: dangphuongthao@humg.edu.vn 2Vietnam Mining Science and Technology Association, 655 Pham Van Dong, Co Nhue 1 Ward, Bac Tu Liem District, Hanoi, Vietnam; E-mail: thaolv51@gmail.com Corresponding author: dangphuongthao@humg.edu.vn ABSTRACT.  In recent years, in ...

Angel Zabchev, Romeo Alexandrov University of Mining and Geology “St. Ivan Rilski”, Sofia 1700, email: angel.zabtchev@mgu.bg Abstract: Based on a patented electromagnetic separator with six electromagnets (EM), a supply voltage and thyristor rectifier are proposed for generating current through the electromagnets. The currents in the six electromagnets create a travelling magnetic field that transports the magnetic ...

Nikolay Stoyanov, Stefan Dimovski University of Mining and Geology “St. Ivan Rilski”, 1700 Sofia, e-mail: nts@mgu.bg; dimovski@mgu.bg ABSTRACT. Until the end of the 20th century, the uncontrolled discharge of highly polluted emissions from the non-ferrous metals companies in Bulgaria was the cause of heavy contamination in vast areas around these industrial sites. In the last two decades, ...

Mykola Stadnichuk1, Oleksandr Krukovskyi2, Serhii Kurnosov3, Serhii Makeiev4  1Department of Mine Energy Complexes, M.S. Polyakov Institute of Geotechnical Mechanics NAS of Ukraine, Dnipro, Ukraine, E-mail: krosh1983@gmail.com 2Department of Rock Mechanics, M.S. Polyakov Institute of Geotechnical Mechanics NAS of Ukraine, Dnipro, Ukraine, E-mail: igtm@ukr.net 3Department of Mineral Mining at Great Depths, M.S. Polyakov Institute of Geotechnical Mechanics NAS ...

Rosen Ivanov, Petia Genova University of Mining and Geology “St. Ivan Rilski”, 1700 Sofia; E-mail: r.ivanov@mgu.bg Corresponding author: r.ivanov@mgu.bg ABSTRACT. Sediment microbial fuel cells (SMFCs) are bio-electrochemical systems in which the anode is placed in the anaerobic sediment and the cathode is immersed in the surface layer of water. Natural exoelectrogenic bacteria decompose organic compounds in sediment, producing ...

Emmanuel Ababio Ofosu-Mensah Department of History, University of Ghana, Legon, Accra, Ghana, West Africa; E-mail: eaofosu-mensah@ug.edu.gh ORCID: 0000-0003-4376-1849 Corresponding author: eaofosu-mensah@ug.edu.gh ABSTRACT: This study examines precolonial gold mining in Akyem Abuakwa in Ghana’s Eastern Region. It uses a historiographical approach, combining primary and secondary data and oral interviews to show the mineral processing and metallurgical technology used in mining ...

Dimitar Kaykov1, Danail Terziyski2, Kremena Arsova-Borisova3, Milan Stajić4 1University of Mining and Geology “St. Ivan Rilski”, 1700 Sofia; E-mail: dimitar.kaykov@mgu.bg 2University of Mining and Geology “St. Ivan Rilski”, 1700 Sofia; E-mail: d.terziyski @mgu.bg 3University of Mining and Geology “St. Ivan Rilski”, 1700 Sofia; E-mail: kremena.arsova@mgu.bg 4University of Belgrade, Technical Faculty in Bor, 19210 Bor; E-mail: mstajic@tfbor.bg.ac.rs Corresponding author: dimitar.kaykov@mgu.bg ABSTRACT. ...

Plamen Georgiev, Marina Nicolova, Irena Spasova, Stoyan Groudev University of Mining and Geology “St. Ivan Rilski”, 1700 Sofia; E-mail: ps_georgiev@mgu.bg Corresponding author: ps_georgiev@mgu.bg ABSTRACT. Laden leach solution, generated from bioleaching of pyrometallurgical copper slags with a mixed culture of moderately thermophilic bacteria in a bioreactor, contains several base metals (Cu, Co, Zn) and a very high concentration of ...

Petia Genova1, Katerina Nikolova1, Anatoliy Angenov1, Svetlana Bratkova1, Nato Mirdzveli2  1University of Mining and Geology “St. Ivan Rilski”, 1700 Sofia; Bulgaria 2 Petre Melikishvili Institute of Physical and Organic Chemistry, I. Javakhishvili Tbilisi State University, 1086, Tbilisi, Georgia Corresponding author: Svetlana Bratkova, E-mail: s_bratkova@mgu.bg  ABSTRACT. One of the commonly used methods for removing sulphates from mine waters is the ...

Fîță Nicolae Daniel1, Stănilă Daniela Sorina2, Păsculescu Dragoș3, Lazăr Teodora4, Popescu Florin Gabriel5,  Mureșan-Grecu Florin6 1University of Petroșani, 332006 Petroșani; E-mail: daniel.fita@yahoo.com 2University of Petroșani, 332006 Petroșani; E-mail: sorina_stanila@yahoo.com 3University of Petroșani, 332006 Petroșani; E-mail: pdragos_74@yahoo.com 4University of Petroșani, 332006 Petroșani; E-mail: teomititica@yahoo.com 5University of Petroșani, 332006 Petroșani; E-mail: floringabriel82@yahoo.com 6University of Petroșani, 332006 Petroșani; E-mail: flomavon2002@yahoo.com Corresponding author: daniel.fita@yahoo.com ABSTRACT. The need ...

O.V. Fedoskina, M.M. Yerisov, V.O. Fedoskin  Dnipro University of Technology, Dnipro, Ukraine. Emails: erisov@ukr.net, fedoskin.va@ukr.net Corresponding author: fedoskina.ev@gmail.com  ABSTRACT. An innovative method of vibro-impact grinding of geological samples, implemented in a vibrating jaw crusher with an inclined crushing chamber, is considered to obtain a product of -1 mm in one crushing cycle. The technique consisted in comparing the ...

Alexander Brodt MLTS Group of Kairos Development International Inc., 31 Oakland Av. Pontiac, MI 48324 USA, E-mail: alexander.brodt@gmail.com ABSTRACT. Existing coal hydro-transport technologies require preliminary grinding of coal into powder. The same circumstance prevents the use of pipeline transport for the delivery of granite, limestone and other building materials from mining sites to the consumer. With an ...

Velichka Arahangelova1, Alexandre Loukanov1,2  1 Laboratory of Engineering NanoBiotechnology, Department of Eng. Geoecology, University of Mining and Geology “St. Ivan Rilski” – Sofia, Bulgaria, E-mails: w.mitova@abv.bg, 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-mails: loukanov@gunma-ct.ac.jp ABSTRACT. The bioaccumulation and environmental toxicity of colloidal contaminants have ...