TY  - JOUR
AU  - Đorđević, Nataša
AU  - Matijašević, Srđan
AU  - Mihajlović, Slavica
AU  - Stojanović, Jovica
AU  - Radulović, Aleksandra
AU  - Savić, Ljiljana
PY  - 2023
UR  - https://ritnms.itnms.ac.rs/handle/123456789/1207
AB  - The glass was prepared by the standard melt-quenching technique. The crystallization of powder glass from the system Li2O-Al2O3-GeO2-P2O5 was studied. The investigations were performed under non-isothermal and isothermal conditions using the AAS, DTA, XRD and FTIR methods. The aim of this research was to study the ease of glass formation, crystallization and crystal structure of obtained phases. The results showed that the glass crystallizes by primary crystallization. LiGe2(PO4)3 was formed as the primary phase, until detectable traces of GeO2 were formed as secondary. The influence of particle size of the glass powder samples in the range 0-1 mm on the temperature of the DTA crystallization peak, Tp, the peak height (T)p and the parameter Tp2/(T)p was studied. It was demonstrated that for the particle size in the range of 0.05-0.35 mm surface and volume crystallization were significant, while the particle size >0.35 mm according to the volume crystallization was dominant.
PB  - Belgrade : Association for ETRAN Society
T2  - Science of Sintering
T1  - The effect of particle size on the crystallization LiGe2(PO4)3  phase from glass
DO  - 10.2298/SOS231111064D
ER  - 

@article{
author = "Đorđević, Nataša and Matijašević, Srđan and Mihajlović, Slavica and Stojanović, Jovica and Radulović, Aleksandra and Savić, Ljiljana",
year = "2023",
abstract = "The glass was prepared by the standard melt-quenching technique. The crystallization of powder glass from the system Li2O-Al2O3-GeO2-P2O5 was studied. The investigations were performed under non-isothermal and isothermal conditions using the AAS, DTA, XRD and FTIR methods. The aim of this research was to study the ease of glass formation, crystallization and crystal structure of obtained phases. The results showed that the glass crystallizes by primary crystallization. LiGe2(PO4)3 was formed as the primary phase, until detectable traces of GeO2 were formed as secondary. The influence of particle size of the glass powder samples in the range 0-1 mm on the temperature of the DTA crystallization peak, Tp, the peak height (T)p and the parameter Tp2/(T)p was studied. It was demonstrated that for the particle size in the range of 0.05-0.35 mm surface and volume crystallization were significant, while the particle size >0.35 mm according to the volume crystallization was dominant.",
publisher = "Belgrade : Association for ETRAN Society",
journal = "Science of Sintering",
title = "The effect of particle size on the crystallization LiGe2(PO4)3  phase from glass",
doi = "10.2298/SOS231111064D"
}

Đorđević, N., Matijašević, S., Mihajlović, S., Stojanović, J., Radulović, A.,& Savić, L.. (2023). The effect of particle size on the crystallization LiGe2(PO4)3  phase from glass. in Science of Sintering
Belgrade : Association for ETRAN Society..
https://doi.org/10.2298/SOS231111064D

Đorđević N, Matijašević S, Mihajlović S, Stojanović J, Radulović A, Savić L. The effect of particle size on the crystallization LiGe2(PO4)3  phase from glass. in Science of Sintering. 2023;.
doi:10.2298/SOS231111064D .

Đorđević, Nataša, Matijašević, Srđan, Mihajlović, Slavica, Stojanović, Jovica, Radulović, Aleksandra, Savić, Ljiljana, "The effect of particle size on the crystallization LiGe2(PO4)3  phase from glass" in Science of Sintering (2023),
https://doi.org/10.2298/SOS231111064D . .

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 .