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  - 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 .

TY  - JOUR
AU  - Sekulić, Živko
AU  - Bartulović, Zoran
AU  - Mihajlović, Slavica
AU  - Ignjatović, Miroslav
AU  - Savić, Ljubinko
AU  - Jovanović, Vladimir
AU  - Nišić, Dragan
PY  - 2017
UR  - https://ritnms.itnms.ac.rs/handle/123456789/1078
AB  - This review article surveys the subject of choice of high gradient magnetic separation processes for removal of Fe2 O3 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. Fe2 O3 carriers. The choice of this process for Fe2 O3 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 Fe2 O3 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  - Warszawa : Polska Akad Nauk, Polish Acad Sciences, Miner & Energy Econ Res Inst Pas
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
ER  - 

@article{
author = "Sekulić, Živko and Bartulović, Zoran and Mihajlović, Slavica and Ignjatović, Miroslav and Savić, Ljubinko and Jovanović, Vladimir and Nišić, Dragan",
year = "2017",
abstract = "This review article surveys the subject of choice of high gradient magnetic separation processes for removal of Fe2 O3 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. Fe2 O3 carriers. The choice of this process for Fe2 O3 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 Fe2 O3 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 = "Warszawa : Polska Akad Nauk, Polish Acad Sciences, Miner & Energy Econ Res Inst Pas",
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"
}

Sekulić, Ž., Bartulović, Z., Mihajlović, S., Ignjatović, M., Savić, L., Jovanović, V.,& Nišić, 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
Warszawa : Polska Akad Nauk, Polish Acad Sciences, Miner & Energy Econ Res Inst Pas., 33(4), 93-106.
https://doi.org/10.1515/gospo-2017-0047

Sekulić Ž, Bartulović Z, Mihajlović S, Ignjatović M, Savić L, Jovanović V, Nišić 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 .

Sekulić, Živko, Bartulović, Zoran, Mihajlović, Slavica, Ignjatović, Miroslav, Savić, Ljubinko, Jovanović, Vladimir, Nišić, Dragan, "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 . .