TY  - JOUR
AU  - Mihajlović, Slavica
AU  - Đorđević, Nataša
AU  - Jovanović, Marina N.
AU  - Vlahović, Milica
AU  - Savić, Ljubinko
AU  - Patarić, Aleksandra
AU  - Blagojev, Marina S.
PY  - 2021
UR  - https://ritnms.itnms.ac.rs/handle/123456789/592
AB  - This work presents a grinding process of monoammonium phosphate (MAP) as an active component in a powder fire extinguisher (PFE). The aim was to determine the grinding time for reaching the optimal particle size of MAP necessary for permanent fire extinguishing. MAP grinding was performed by using a laboratory ceramic ball mill and a vibrating cup mill. The grinding process was controlled by sieving using a 100 mu m sieve at precisely defined time intervals. The efficiency of a PFE depends on the share of the-100 mu m fraction of the active component, which has to exceed 60 %. The optimal grain size with 64 % of fraction of particle size-100 mu m was obtained after 33 min of grinding of =3000 mu m mm grain size MAP by using a ball mill (single-stage grinding). In two-stage process, by grinding the same initial MAP sample (=3000 mu m) in the vibro mill for 10 min, powder with the upper limit grain size of 300 mu m and the mean grain diameter of 120 mu m was obtained. This sample with a reduced size was further ground in the ceramic ball mill yielding 67.5 % of the fraction of particle size 100 mu m after 19 min. The total time of the two-stage grinding process was 29 min. By analyzing the grinding time of MAP required to get the lowest required share of the fraction of particle size-100 mu m that provides the effectiveness of formed PFE it can be concluded that 64 % of this fraction was obtained after 33 min of single-stage grinding, while only after 26 min in the two-stage process. Thus, the grinding time was reduced by 7 min indicating certain energy savings. Stability and hydrophobicity of the obtained PFE were achieved by coating with magnesium stearate (MgSt) at the content of 2 % in a ball mill for 15 min. The coating was confirmed by the standardized procedure for verification of PFE hydrophobic properties in contact with water drops. To obtained PFE had component mass ratios of MAP:AS:CC:QS:MgSt=55:20:18:5:2 (AS-ammonium sulfate; CC-calcium carbonate, QS-quartz sand) and was further characterized by chemical and granulometric analyses. The fire extinguishing efficiency of the PFE was tested in controlled conditions, whereby fires were initiated by burning solid materials and flammable liquids. In both cases, immediate elimination of flames was achieved, thus proving the efficiency of the PFE obtained in this work for practical applications..
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska industrija
T1  - Optimization of the active component grinding process and hydrophobization of the obtained powder fire extinguisher
EP  - 75
IS  - 2
SP  - 65
VL  - 75
DO  - 10.2298/HEMIND210114012M
UR  - conv_910
ER  - 

@article{
author = "Mihajlović, Slavica and Đorđević, Nataša and Jovanović, Marina N. and Vlahović, Milica and Savić, Ljubinko and Patarić, Aleksandra and Blagojev, Marina S.",
year = "2021",
abstract = "This work presents a grinding process of monoammonium phosphate (MAP) as an active component in a powder fire extinguisher (PFE). The aim was to determine the grinding time for reaching the optimal particle size of MAP necessary for permanent fire extinguishing. MAP grinding was performed by using a laboratory ceramic ball mill and a vibrating cup mill. The grinding process was controlled by sieving using a 100 mu m sieve at precisely defined time intervals. The efficiency of a PFE depends on the share of the-100 mu m fraction of the active component, which has to exceed 60 %. The optimal grain size with 64 % of fraction of particle size-100 mu m was obtained after 33 min of grinding of =3000 mu m mm grain size MAP by using a ball mill (single-stage grinding). In two-stage process, by grinding the same initial MAP sample (=3000 mu m) in the vibro mill for 10 min, powder with the upper limit grain size of 300 mu m and the mean grain diameter of 120 mu m was obtained. This sample with a reduced size was further ground in the ceramic ball mill yielding 67.5 % of the fraction of particle size 100 mu m after 19 min. The total time of the two-stage grinding process was 29 min. By analyzing the grinding time of MAP required to get the lowest required share of the fraction of particle size-100 mu m that provides the effectiveness of formed PFE it can be concluded that 64 % of this fraction was obtained after 33 min of single-stage grinding, while only after 26 min in the two-stage process. Thus, the grinding time was reduced by 7 min indicating certain energy savings. Stability and hydrophobicity of the obtained PFE were achieved by coating with magnesium stearate (MgSt) at the content of 2 % in a ball mill for 15 min. The coating was confirmed by the standardized procedure for verification of PFE hydrophobic properties in contact with water drops. To obtained PFE had component mass ratios of MAP:AS:CC:QS:MgSt=55:20:18:5:2 (AS-ammonium sulfate; CC-calcium carbonate, QS-quartz sand) and was further characterized by chemical and granulometric analyses. The fire extinguishing efficiency of the PFE was tested in controlled conditions, whereby fires were initiated by burning solid materials and flammable liquids. In both cases, immediate elimination of flames was achieved, thus proving the efficiency of the PFE obtained in this work for practical applications..",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska industrija",
title = "Optimization of the active component grinding process and hydrophobization of the obtained powder fire extinguisher",
pages = "75-65",
number = "2",
volume = "75",
doi = "10.2298/HEMIND210114012M",
url = "conv_910"
}

Mihajlović, S., Đorđević, N., Jovanović, M. N., Vlahović, M., Savić, L., Patarić, A.,& Blagojev, M. S.. (2021). Optimization of the active component grinding process and hydrophobization of the obtained powder fire extinguisher. in Hemijska industrija
Savez hemijskih inženjera, Beograd., 75(2), 65-75.
https://doi.org/10.2298/HEMIND210114012M
conv_910

Mihajlović S, Đorđević N, Jovanović MN, Vlahović M, Savić L, Patarić A, Blagojev MS. Optimization of the active component grinding process and hydrophobization of the obtained powder fire extinguisher. in Hemijska industrija. 2021;75(2):65-75.
doi:10.2298/HEMIND210114012M
conv_910 .

Mihajlović, Slavica, Đorđević, Nataša, Jovanović, Marina N., Vlahović, Milica, Savić, Ljubinko, Patarić, Aleksandra, Blagojev, Marina S., "Optimization of the active component grinding process and hydrophobization of the obtained powder fire extinguisher" in Hemijska industrija, 75, no. 2 (2021):65-75,
https://doi.org/10.2298/HEMIND210114012M .,
conv_910 .

TY  - JOUR
AU  - Mihajlović, Slavica
AU  - Savić, Ljubinko
AU  - Radosavljević, Dragana
AU  - Savić, Ljiljana B.
AU  - Blagojev, Marina S.
AU  - Hredzák, Slavomír
PY  - 2020
UR  - https://ritnms.itnms.ac.rs/handle/123456789/545
AB  - This paper presents theoretical considerations and working parameters analyzes of hydrotransport during unstable flow. The variable flow of hydraulic mixture in installations causes unsteady operation and pipes spraying, pump damage, obturation in various sections of the pipeline, reduced capacity as well as higher operating costs. Using mathematical equations presented in this paper, such parameters of the hydraulic mixture, hydrotransport installation and control devices can be determined which protect system from possible clogging. Considering the fact that critical speed of hydraulic mixture depends on transported material grain size, mixture volume mass, diameter of pipeline and specific gravity of solid phase, it is possible to accurately analyze obturation in hydrotransport installations depending on those parameters. In order to prevent hydraulic impacts in hydrotransport installation pipelines, which value can be determined mathematically, it is necessary to adjust installation to hydromixture parameters and pump, or vice versa.
PB  - Univerzitet u Beogradu - Rudarsko-geološki fakultet, Beograd
T2  - Podzemni radovi
T1  - Theoretical analysis of hydromixture transport
EP  - 49
IS  - 37
SP  - 41
DO  - 10.5937/podrad2037041M
UR  - conv_232
ER  - 

@article{
author = "Mihajlović, Slavica and Savić, Ljubinko and Radosavljević, Dragana and Savić, Ljiljana B. and Blagojev, Marina S. and Hredzák, Slavomír",
year = "2020",
abstract = "This paper presents theoretical considerations and working parameters analyzes of hydrotransport during unstable flow. The variable flow of hydraulic mixture in installations causes unsteady operation and pipes spraying, pump damage, obturation in various sections of the pipeline, reduced capacity as well as higher operating costs. Using mathematical equations presented in this paper, such parameters of the hydraulic mixture, hydrotransport installation and control devices can be determined which protect system from possible clogging. Considering the fact that critical speed of hydraulic mixture depends on transported material grain size, mixture volume mass, diameter of pipeline and specific gravity of solid phase, it is possible to accurately analyze obturation in hydrotransport installations depending on those parameters. In order to prevent hydraulic impacts in hydrotransport installation pipelines, which value can be determined mathematically, it is necessary to adjust installation to hydromixture parameters and pump, or vice versa.",
publisher = "Univerzitet u Beogradu - Rudarsko-geološki fakultet, Beograd",
journal = "Podzemni radovi",
title = "Theoretical analysis of hydromixture transport",
pages = "49-41",
number = "37",
doi = "10.5937/podrad2037041M",
url = "conv_232"
}

Mihajlović, S., Savić, L., Radosavljević, D., Savić, L. B., Blagojev, M. S.,& Hredzák, S.. (2020). Theoretical analysis of hydromixture transport. in Podzemni radovi
Univerzitet u Beogradu - Rudarsko-geološki fakultet, Beograd.(37), 41-49.
https://doi.org/10.5937/podrad2037041M
conv_232

Mihajlović S, Savić L, Radosavljević D, Savić LB, Blagojev MS, Hredzák S. Theoretical analysis of hydromixture transport. in Podzemni radovi. 2020;(37):41-49.
doi:10.5937/podrad2037041M
conv_232 .

Mihajlović, Slavica, Savić, Ljubinko, Radosavljević, Dragana, Savić, Ljiljana B., Blagojev, Marina S., Hredzák, Slavomír, "Theoretical analysis of hydromixture transport" in Podzemni radovi, no. 37 (2020):41-49,
https://doi.org/10.5937/podrad2037041M .,
conv_232 .

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 . .