TY  - JOUR
AU  - Mihajlović, Slavica
AU  - Sekulić, Živko
AU  - Blagojev, Marina S.
AU  - Ignjatović, Miroslav R.
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/516
AB  - The paper presents the process of quartz sand processing from the "Bijela Stijena" - Skocic deposit in the plant "Kesogradnja d.o.o." at Kozluk near Zvornik, Republic of Srpska. Bearing in mind the fact that this quartz sand is used for water glass production in the company "Birac" - Zvornik or "Alumina" Zvornik, it was necessary to meet the quality requirements prescribed by that industrial production. Thus, the required size was -0.4+0.05 mm and the Fe2O3 content was maximum of 0.04%. Based on the laboratory tests, a technological scheme for the quartz raw material valorization was conceived in the separation of the company "Kesogradnja d.o.o.". The obtained results showed that quartz sand for water glass size fraction -0.4+0.05 mm could be obtained in the plant. Also, by introducing a magnetic concentration after washing and grading, the Fe2O3 content was reduced from 0.131% as it is in the initial sample to 0.038% which meets the required conditions from the water glass producers.
PB  - Savez inženjera metalurgije Srbije, Beograd
T2  - Metallurgical & Materials Engineering
T1  - The process of obtaining quartz sand size fraction -0.4
EP  - 68
IS  - 1
SP  - 59
VL  - 25
DO  - 10.30544/406
UR  - conv_849
ER  - 

@article{
author = "Mihajlović, Slavica and Sekulić, Živko and Blagojev, Marina S. and Ignjatović, Miroslav R.",
year = "2019",
abstract = "The paper presents the process of quartz sand processing from the "Bijela Stijena" - Skocic deposit in the plant "Kesogradnja d.o.o." at Kozluk near Zvornik, Republic of Srpska. Bearing in mind the fact that this quartz sand is used for water glass production in the company "Birac" - Zvornik or "Alumina" Zvornik, it was necessary to meet the quality requirements prescribed by that industrial production. Thus, the required size was -0.4+0.05 mm and the Fe2O3 content was maximum of 0.04%. Based on the laboratory tests, a technological scheme for the quartz raw material valorization was conceived in the separation of the company "Kesogradnja d.o.o.". The obtained results showed that quartz sand for water glass size fraction -0.4+0.05 mm could be obtained in the plant. Also, by introducing a magnetic concentration after washing and grading, the Fe2O3 content was reduced from 0.131% as it is in the initial sample to 0.038% which meets the required conditions from the water glass producers.",
publisher = "Savez inženjera metalurgije Srbije, Beograd",
journal = "Metallurgical & Materials Engineering",
title = "The process of obtaining quartz sand size fraction -0.4",
pages = "68-59",
number = "1",
volume = "25",
doi = "10.30544/406",
url = "conv_849"
}

Mihajlović, S., Sekulić, Ž., Blagojev, M. S.,& Ignjatović, M. R.. (2019). The process of obtaining quartz sand size fraction -0.4. in Metallurgical & Materials Engineering
Savez inženjera metalurgije Srbije, Beograd., 25(1), 59-68.
https://doi.org/10.30544/406
conv_849

Mihajlović S, Sekulić Ž, Blagojev MS, Ignjatović MR. The process of obtaining quartz sand size fraction -0.4. in Metallurgical & Materials Engineering. 2019;25(1):59-68.
doi:10.30544/406
conv_849 .

Mihajlović, Slavica, Sekulić, Živko, Blagojev, Marina S., Ignjatović, Miroslav R., "The process of obtaining quartz sand size fraction -0.4" in Metallurgical & Materials Engineering, 25, no. 1 (2019):59-68,
https://doi.org/10.30544/406 .,
conv_849 .

TY  - JOUR
AU  - Mihajlović, Slavica
AU  - Savić, Ljubinko
AU  - Radosavljević, Dragana B.
AU  - Savić, Ljiljana B.
AU  - Ignjatović, Miroslav R.
AU  - Blagojev, Marina S.
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/500
AB  - The main problem of hydraulic transport is the resistance generated during the mixture transport through the pipe-line. Testing the flow characteristics of mixtures, shown in this paper, are based on the principles of determining the unit energy losses by a mathematical calculation using the non-linear regression - the Levenberg-Marquardt algorithm. Such obtained results allow determining a transport rate in the horizontal pipe-line, depending on the mixture bulk density and pipe-line diameter. The flotation tailings is mainly used as a filling material in the mine "Trepca" - Stari Trg. According to the grain size distribution, it is a fine-grained material of a size of 0.074 mm to 1.2 mm. It is a multicomponent material containing pyrite, pyrrhotine and other heavy metals, and therefore, has a high bulk mass. The average rate of the hydromixture, in which the energy losses reach the minimum value, depends on the pipe-line diameter and kinetic bulk density of the mixture. For the test interval of change in the pipe-line diameter, shown in this paper (0.168 mm, 0.176 mm, 0.193 mm, and 0.225 mm), and kinetic bulk density of the hydraulic mixture (1-1.6 kg/m(3)), this rate ranges from 3-5.5 m/s. The increase of the energy losses in the hydraulic mixture transport increases proportionality with the increase of its kinetic bulk density. The results, presented in this paper, show that the required bulk density of 1.6 kg/m(3) should be accepted as a limit from a point of view of the hydraulic transport cost-efficiency.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - the non-linear regression - the levenberg-marquardt algorithm for assumption the energy losses of hydraulic transport in a case of the mine "trepca"
EP  - 2938
IS  - 5
SP  - 2929
VL  - 23
DO  - 10.2298/TSCI180608252M
UR  - conv_866
ER  - 

@article{
author = "Mihajlović, Slavica and Savić, Ljubinko and Radosavljević, Dragana B. and Savić, Ljiljana B. and Ignjatović, Miroslav R. and Blagojev, Marina S.",
year = "2019",
abstract = "The main problem of hydraulic transport is the resistance generated during the mixture transport through the pipe-line. Testing the flow characteristics of mixtures, shown in this paper, are based on the principles of determining the unit energy losses by a mathematical calculation using the non-linear regression - the Levenberg-Marquardt algorithm. Such obtained results allow determining a transport rate in the horizontal pipe-line, depending on the mixture bulk density and pipe-line diameter. The flotation tailings is mainly used as a filling material in the mine "Trepca" - Stari Trg. According to the grain size distribution, it is a fine-grained material of a size of 0.074 mm to 1.2 mm. It is a multicomponent material containing pyrite, pyrrhotine and other heavy metals, and therefore, has a high bulk mass. The average rate of the hydromixture, in which the energy losses reach the minimum value, depends on the pipe-line diameter and kinetic bulk density of the mixture. For the test interval of change in the pipe-line diameter, shown in this paper (0.168 mm, 0.176 mm, 0.193 mm, and 0.225 mm), and kinetic bulk density of the hydraulic mixture (1-1.6 kg/m(3)), this rate ranges from 3-5.5 m/s. The increase of the energy losses in the hydraulic mixture transport increases proportionality with the increase of its kinetic bulk density. The results, presented in this paper, show that the required bulk density of 1.6 kg/m(3) should be accepted as a limit from a point of view of the hydraulic transport cost-efficiency.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "the non-linear regression - the levenberg-marquardt algorithm for assumption the energy losses of hydraulic transport in a case of the mine "trepca"",
pages = "2938-2929",
number = "5",
volume = "23",
doi = "10.2298/TSCI180608252M",
url = "conv_866"
}

Mihajlović, S., Savić, L., Radosavljević, D. B., Savić, L. B., Ignjatović, M. R.,& Blagojev, M. S.. (2019). the non-linear regression - the levenberg-marquardt algorithm for assumption the energy losses of hydraulic transport in a case of the mine "trepca". in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 23(5), 2929-2938.
https://doi.org/10.2298/TSCI180608252M
conv_866

Mihajlović S, Savić L, Radosavljević DB, Savić LB, Ignjatović MR, Blagojev MS. the non-linear regression - the levenberg-marquardt algorithm for assumption the energy losses of hydraulic transport in a case of the mine "trepca". in Thermal Science. 2019;23(5):2929-2938.
doi:10.2298/TSCI180608252M
conv_866 .

Mihajlović, Slavica, Savić, Ljubinko, Radosavljević, Dragana B., Savić, Ljiljana B., Ignjatović, Miroslav R., Blagojev, Marina S., "the non-linear regression - the levenberg-marquardt algorithm for assumption the energy losses of hydraulic transport in a case of the mine "trepca"" in Thermal Science, 23, no. 5 (2019):2929-2938,
https://doi.org/10.2298/TSCI180608252M .,
conv_866 .

TY  - JOUR
AU  - Sekulić, Živko
AU  - Mihajlović, Slavica
AU  - Stojanović, Jovica
AU  - Ivošević, Branislav
AU  - Kašić, Vladan
AU  - Ignjatović, Miroslav R.
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/494
AB  - This study shows the results of flotation concentration of mica minerals from kaolinised granite taken from the "Basica bare" deposit - Kobas, Srbac, The Republic of Srpska (B&H). Mineralogical composition of kaolinised granite is as follows: kaolinite, feldspar, quartz, and mica. After separating >0.630 mm, and  LT 0.043 mm size class where kaolinite is concentrated, the rest is -0.630+0.043 mm class containing quartz, feldspar and mica. The mica concentrate was obtained by the flotation concentration, while feldspar and quartz were in the flotation underflow. According to the mineralogical analysis, the most abundant minerals are mica and chlorite/clays, while quartz and feldspar occur much less, and accessory minerals are represented in trace. The semi-quantitative mineralogical analysis obtained by the X-ray powder diffraction (XRPD) method of the mica concentrate amount to: mica approximate to 55%, chlorite/clays approximate to 35%, quartz approximate to 5%, feldspars (plagioclase and K-feldspars combined) approximate to 5%.
PB  - Polska Akad Nauk, Polish Acad Sciences, Warszawa
T2  - Archives of Mining Sciences
T1  - Potentiality of obtaining mica flotation concentrate from kaolinised granite
EP  - 508
IS  - 3
SP  - 499
VL  - 64
DO  - 10.24425/ams.2019.129365
UR  - conv_860
ER  - 

@article{
author = "Sekulić, Živko and Mihajlović, Slavica and Stojanović, Jovica and Ivošević, Branislav and Kašić, Vladan and Ignjatović, Miroslav R.",
year = "2019",
abstract = "This study shows the results of flotation concentration of mica minerals from kaolinised granite taken from the "Basica bare" deposit - Kobas, Srbac, The Republic of Srpska (B&H). Mineralogical composition of kaolinised granite is as follows: kaolinite, feldspar, quartz, and mica. After separating >0.630 mm, and  LT 0.043 mm size class where kaolinite is concentrated, the rest is -0.630+0.043 mm class containing quartz, feldspar and mica. The mica concentrate was obtained by the flotation concentration, while feldspar and quartz were in the flotation underflow. According to the mineralogical analysis, the most abundant minerals are mica and chlorite/clays, while quartz and feldspar occur much less, and accessory minerals are represented in trace. The semi-quantitative mineralogical analysis obtained by the X-ray powder diffraction (XRPD) method of the mica concentrate amount to: mica approximate to 55%, chlorite/clays approximate to 35%, quartz approximate to 5%, feldspars (plagioclase and K-feldspars combined) approximate to 5%.",
publisher = "Polska Akad Nauk, Polish Acad Sciences, Warszawa",
journal = "Archives of Mining Sciences",
title = "Potentiality of obtaining mica flotation concentrate from kaolinised granite",
pages = "508-499",
number = "3",
volume = "64",
doi = "10.24425/ams.2019.129365",
url = "conv_860"
}

Sekulić, Ž., Mihajlović, S., Stojanović, J., Ivošević, B., Kašić, V.,& Ignjatović, M. R.. (2019). Potentiality of obtaining mica flotation concentrate from kaolinised granite. in Archives of Mining Sciences
Polska Akad Nauk, Polish Acad Sciences, Warszawa., 64(3), 499-508.
https://doi.org/10.24425/ams.2019.129365
conv_860

Sekulić Ž, Mihajlović S, Stojanović J, Ivošević B, Kašić V, Ignjatović MR. Potentiality of obtaining mica flotation concentrate from kaolinised granite. in Archives of Mining Sciences. 2019;64(3):499-508.
doi:10.24425/ams.2019.129365
conv_860 .

Sekulić, Živko, Mihajlović, Slavica, Stojanović, Jovica, Ivošević, Branislav, Kašić, Vladan, Ignjatović, Miroslav R., "Potentiality of obtaining mica flotation concentrate from kaolinised granite" in Archives of Mining Sciences, 64, no. 3 (2019):499-508,
https://doi.org/10.24425/ams.2019.129365 .,
conv_860 .

TY  - JOUR
AU  - Sekulić, Živko
AU  - Bartulović, Zoran
AU  - Mihajlović, Slavica
AU  - Ignjatović, Miroslav R.
AU  - Savić, Ljubinko
AU  - Jovanović, Vladimir
AU  - Nisić, Dragana
PY  - 2017
UR  - https://ritnms.itnms.ac.rs/handle/123456789/420
AB  - This review article surveys the subject of choice of high gradient magnetic separation processes for removal of Fe2O3 carriers from quartz raw material by electromagnetic separator with magnetic field intensity of 1.4 T. The review is based on current experience of authors during research phase, as well as project development phase and initial operation of facilities in several locations. Quartz mineral raw material in those locations appeared as sandstone or as loose material. In addition to that, quartz raw material from those locations contained various impurities, i.e. Fe2O3 carriers. The choice of this process for Fe2O3 removal depended on mineralogical composition, shape and the content of minerals, and Fe2O3 removal rate after this process was from 29 to 65%. Magnetic separation is magnetic induction of 1.4 T. It is applied on commercial assortments which were previously subjected to washing and classification processes. It is always the assortment which has to have the lowest Fe2O3 content. The choice of, "dry" or, "wet" magnetic separation (with water flush) also depends on the fact whether this desired assortment is intended for market as dry or wet, as well as on the composition of magnetic impurities. In most cases, the process applied is the wet one.
PB  - Polska Akad Nauk, Polish Acad Sciences, Miner & Energy Econ Res Inst Pas, Warszawa
T2  - Gospodarka Surowcami Mineralnymi-Mineral Resources Management
T1  - The choice of high gradient magnetic separation processes for removal of Fe2O3 carriers from quartz raw material
EP  - 106
IS  - 4
SP  - 93
VL  - 33
DO  - 10.1515/gospo-2017-0047
UR  - conv_813
ER  - 

@article{
author = "Sekulić, Živko and Bartulović, Zoran and Mihajlović, Slavica and Ignjatović, Miroslav R. and Savić, Ljubinko and Jovanović, Vladimir and Nisić, Dragana",
year = "2017",
abstract = "This review article surveys the subject of choice of high gradient magnetic separation processes for removal of Fe2O3 carriers from quartz raw material by electromagnetic separator with magnetic field intensity of 1.4 T. The review is based on current experience of authors during research phase, as well as project development phase and initial operation of facilities in several locations. Quartz mineral raw material in those locations appeared as sandstone or as loose material. In addition to that, quartz raw material from those locations contained various impurities, i.e. Fe2O3 carriers. The choice of this process for Fe2O3 removal depended on mineralogical composition, shape and the content of minerals, and Fe2O3 removal rate after this process was from 29 to 65%. Magnetic separation is magnetic induction of 1.4 T. It is applied on commercial assortments which were previously subjected to washing and classification processes. It is always the assortment which has to have the lowest Fe2O3 content. The choice of, "dry" or, "wet" magnetic separation (with water flush) also depends on the fact whether this desired assortment is intended for market as dry or wet, as well as on the composition of magnetic impurities. In most cases, the process applied is the wet one.",
publisher = "Polska Akad Nauk, Polish Acad Sciences, Miner & Energy Econ Res Inst Pas, Warszawa",
journal = "Gospodarka Surowcami Mineralnymi-Mineral Resources Management",
title = "The choice of high gradient magnetic separation processes for removal of Fe2O3 carriers from quartz raw material",
pages = "106-93",
number = "4",
volume = "33",
doi = "10.1515/gospo-2017-0047",
url = "conv_813"
}

Sekulić, Ž., Bartulović, Z., Mihajlović, S., Ignjatović, M. R., Savić, L., Jovanović, V.,& Nisić, D.. (2017). The choice of high gradient magnetic separation processes for removal of Fe2O3 carriers from quartz raw material. in Gospodarka Surowcami Mineralnymi-Mineral Resources Management
Polska Akad Nauk, Polish Acad Sciences, Miner & Energy Econ Res Inst Pas, Warszawa., 33(4), 93-106.
https://doi.org/10.1515/gospo-2017-0047
conv_813

Sekulić Ž, Bartulović Z, Mihajlović S, Ignjatović MR, Savić L, Jovanović V, Nisić D. The choice of high gradient magnetic separation processes for removal of Fe2O3 carriers from quartz raw material. in Gospodarka Surowcami Mineralnymi-Mineral Resources Management. 2017;33(4):93-106.
doi:10.1515/gospo-2017-0047
conv_813 .

Sekulić, Živko, Bartulović, Zoran, Mihajlović, Slavica, Ignjatović, Miroslav R., Savić, Ljubinko, Jovanović, Vladimir, Nisić, Dragana, "The choice of high gradient magnetic separation processes for removal of Fe2O3 carriers from quartz raw material" in Gospodarka Surowcami Mineralnymi-Mineral Resources Management, 33, no. 4 (2017):93-106,
https://doi.org/10.1515/gospo-2017-0047 .,
conv_813 .