TY  - CONF
AU  - Đorđević, Nataša
AU  - Vlahović, Milica
AU  - Mihajlović, Slavica
AU  - Vušović, Nenad
AU  - Matijašević, Srđan
PY  - 2023
UR  - https://ritnms.itnms.ac.rs/handle/123456789/1180
AB  - Mechanical activation of materials leads to qualitative changes in material structure. These changes can include the accumulation of energy in the form of weakening bonds in the crystal, disruption of the crystal lattice, agglomeration, and in some cases even the synthesis of a completely new substance. In this study, anhydrous sodium carbonate was mechanically activated for 28 minutes in a vibro mill at a frequency of 3000 oscillations per minute. After activation, the changes occurring in the activated material were monitored. The samples were placed in the atmosphere of air at room conditions for 31 days (relaxation period). It was observed that during the relaxation period moisture and carbon dioxide were absorbed by the activated sodium carbonate in form of hemisorption, forming sodium bicarbonate. The transformation mechanism was monitored by Fourier-transform infrared (FTIR) spectroscopy as a function of relaxation time. Characteristic groups were monitored: CO32-, HCO3- and OH-.
PB  - Belgrade : Union of Mechanical and Electrotechnical Engineers and Technicians of Serbia (SMEITS)
PB  - Belgrade : Society for Renewable Electrical Power Sources
C3  - 11th International Conference on Renewable Electrical Power Sources (ICREPS 2023)
T1  - Spectroscopy analysis of activated sodium carbonate
EP  - 413
SP  - 409
ER  - 

@conference{
author = "Đorđević, Nataša and Vlahović, Milica and Mihajlović, Slavica and Vušović, Nenad and Matijašević, Srđan",
year = "2023",
abstract = "Mechanical activation of materials leads to qualitative changes in material structure. These changes can include the accumulation of energy in the form of weakening bonds in the crystal, disruption of the crystal lattice, agglomeration, and in some cases even the synthesis of a completely new substance. In this study, anhydrous sodium carbonate was mechanically activated for 28 minutes in a vibro mill at a frequency of 3000 oscillations per minute. After activation, the changes occurring in the activated material were monitored. The samples were placed in the atmosphere of air at room conditions for 31 days (relaxation period). It was observed that during the relaxation period moisture and carbon dioxide were absorbed by the activated sodium carbonate in form of hemisorption, forming sodium bicarbonate. The transformation mechanism was monitored by Fourier-transform infrared (FTIR) spectroscopy as a function of relaxation time. Characteristic groups were monitored: CO32-, HCO3- and OH-.",
publisher = "Belgrade : Union of Mechanical and Electrotechnical Engineers and Technicians of Serbia (SMEITS), Belgrade : Society for Renewable Electrical Power Sources",
journal = "11th International Conference on Renewable Electrical Power Sources (ICREPS 2023)",
title = "Spectroscopy analysis of activated sodium carbonate",
pages = "413-409"
}

Đorđević, N., Vlahović, M., Mihajlović, S., Vušović, N.,& Matijašević, S.. (2023). Spectroscopy analysis of activated sodium carbonate. in 11th International Conference on Renewable Electrical Power Sources (ICREPS 2023)
Belgrade : Union of Mechanical and Electrotechnical Engineers and Technicians of Serbia (SMEITS)., 409-413.

Đorđević N, Vlahović M, Mihajlović S, Vušović N, Matijašević S. Spectroscopy analysis of activated sodium carbonate. in 11th International Conference on Renewable Electrical Power Sources (ICREPS 2023). 2023;:409-413..

Đorđević, Nataša, Vlahović, Milica, Mihajlović, Slavica, Vušović, Nenad, Matijašević, Srđan, "Spectroscopy analysis of activated sodium carbonate" in 11th International Conference on Renewable Electrical Power Sources (ICREPS 2023) (2023):409-413.

TY  - JOUR
AU  - Medić, D.V.
AU  - Sokić, Miroslav
AU  - Nujkić, M.M.
AU  - Đorđievski, S.S.
AU  - Milić, S.M.
AU  - Alagić, S.Č.
AU  - Antonijević, Milan M.
PY  - 2023
UR  - https://ritnms.itnms.ac.rs/handle/123456789/654
AB  - To increase the degree of cobalt (Co) extraction, the process of the cathode material leaching was performed in a sulfuric acid (H2SO4) solution containing sulfur dioxide (SO2) as a reducing agent. To provide a high resolution of the obtained results, frequent monitoring of Co concentrations in leached solution was conducted using an ultraviolet–visible spectrophotometer with several specific modifications related to the connection of the reaction vessel with the instrumental cuvette. The maximum degree of Co leaching (99.4%) was achieved with H2SO4 concentration of 3 mol/L, solid phase concentration of 33 g/L, temperature of 85 °C, SO2 volume flow of 2 L/min, and leaching time of 60 min. The results of the performed kinetic analyses indicated that the Avrami equation best describes the investigated leaching process, which later was supported by the results of X-ray diffraction and scanning electron microscopy–energy-dispersive X-ray spectroscopy analyses. Also, the activation energy of 28 ± 3 kJ/mol is in favor of the fact that the process of Co leaching was controlled by the factors, such as diffusion and chemical reaction. The results of this study indicated that SO2 can be used as an effective reducing agent in the investigated process.
PB  - Springer
T2  - Journal of Material Cycles and Waste Management
T1  - Cobalt extraction from spent lithium-ion battery cathode material using a sulfuric acid solution containing SO2
EP  - 1018
IS  - 2
SP  - 1008
VL  - 25
DO  - 10.1007/s10163-022-01580-w
UR  - conv_983
ER  - 

@article{
author = "Medić, D.V. and Sokić, Miroslav and Nujkić, M.M. and Đorđievski, S.S. and Milić, S.M. and Alagić, S.Č. and Antonijević, Milan M.",
year = "2023",
abstract = "To increase the degree of cobalt (Co) extraction, the process of the cathode material leaching was performed in a sulfuric acid (H2SO4) solution containing sulfur dioxide (SO2) as a reducing agent. To provide a high resolution of the obtained results, frequent monitoring of Co concentrations in leached solution was conducted using an ultraviolet–visible spectrophotometer with several specific modifications related to the connection of the reaction vessel with the instrumental cuvette. The maximum degree of Co leaching (99.4%) was achieved with H2SO4 concentration of 3 mol/L, solid phase concentration of 33 g/L, temperature of 85 °C, SO2 volume flow of 2 L/min, and leaching time of 60 min. The results of the performed kinetic analyses indicated that the Avrami equation best describes the investigated leaching process, which later was supported by the results of X-ray diffraction and scanning electron microscopy–energy-dispersive X-ray spectroscopy analyses. Also, the activation energy of 28 ± 3 kJ/mol is in favor of the fact that the process of Co leaching was controlled by the factors, such as diffusion and chemical reaction. The results of this study indicated that SO2 can be used as an effective reducing agent in the investigated process.",
publisher = "Springer",
journal = "Journal of Material Cycles and Waste Management",
title = "Cobalt extraction from spent lithium-ion battery cathode material using a sulfuric acid solution containing SO2",
pages = "1018-1008",
number = "2",
volume = "25",
doi = "10.1007/s10163-022-01580-w",
url = "conv_983"
}

Medić, D.V., Sokić, M., Nujkić, M.M., Đorđievski, S.S., Milić, S.M., Alagić, S.Č.,& Antonijević, M. M.. (2023). Cobalt extraction from spent lithium-ion battery cathode material using a sulfuric acid solution containing SO2. in Journal of Material Cycles and Waste Management
Springer., 25(2), 1008-1018.
https://doi.org/10.1007/s10163-022-01580-w
conv_983

Medić D, Sokić M, Nujkić M, Đorđievski S, Milić S, Alagić S, Antonijević MM. Cobalt extraction from spent lithium-ion battery cathode material using a sulfuric acid solution containing SO2. in Journal of Material Cycles and Waste Management. 2023;25(2):1008-1018.
doi:10.1007/s10163-022-01580-w
conv_983 .

Medić, D.V., Sokić, Miroslav, Nujkić, M.M., Đorđievski, S.S., Milić, S.M., Alagić, S.Č., Antonijević, Milan M., "Cobalt extraction from spent lithium-ion battery cathode material using a sulfuric acid solution containing SO2" in Journal of Material Cycles and Waste Management, 25, no. 2 (2023):1008-1018,
https://doi.org/10.1007/s10163-022-01580-w .,
conv_983 .

TY  - JOUR
AU  - Đorđević, Nataša
AU  - Vlahović, M.
AU  - Mihajlović, Slavica
AU  - Martinović, S.
AU  - Vušović, Nenad M.
AU  - Šajić, J.L.
PY  - 2022
UR  - https://ritnms.itnms.ac.rs/handle/123456789/623
AB  - During mechanical activation, qualitative changes that can produce various phenomena occur in the material. In this study, anhydrous sodium carbonate was mechanically activated for 2, 7, 14, and 28 minutes in a vibro mill at a frequency of 3000 oscillations per minute. After activation, four series of activated samples were stored in the air at room conditions for 31 days (relaxation period). To monitor the kinetics of the transformation process of activated sodium carbonate samples, i.e. the mechanism of sodium bicarbonate formation during relaxation, Fourier-transform infrared (FTIR) spectroscopy analysis was used. FTIR testing was performed as a function of relaxation time for all four series of samples, with characteristic groups observed: CO32-, HCO3- and OH-. The obtained results provided kinetics parameters for the transformation of sodium carbonate into sodium bicarbonate due to the chemisorption of moisture and carbon dioxide from the atmosphere.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Fourier-Transform Infrared Spectroscopy Analysis of Mechanochemical Transformation Kinetics of Sodium Carbonate to Bicarbonate
EP  - 494
IS  - 4
SP  - 481
VL  - 54
DO  - 10.2298/SOS2204481D
UR  - conv_1000
ER  - 

@article{
author = "Đorđević, Nataša and Vlahović, M. and Mihajlović, Slavica and Martinović, S. and Vušović, Nenad M. and Šajić, J.L.",
year = "2022",
abstract = "During mechanical activation, qualitative changes that can produce various phenomena occur in the material. In this study, anhydrous sodium carbonate was mechanically activated for 2, 7, 14, and 28 minutes in a vibro mill at a frequency of 3000 oscillations per minute. After activation, four series of activated samples were stored in the air at room conditions for 31 days (relaxation period). To monitor the kinetics of the transformation process of activated sodium carbonate samples, i.e. the mechanism of sodium bicarbonate formation during relaxation, Fourier-transform infrared (FTIR) spectroscopy analysis was used. FTIR testing was performed as a function of relaxation time for all four series of samples, with characteristic groups observed: CO32-, HCO3- and OH-. The obtained results provided kinetics parameters for the transformation of sodium carbonate into sodium bicarbonate due to the chemisorption of moisture and carbon dioxide from the atmosphere.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Fourier-Transform Infrared Spectroscopy Analysis of Mechanochemical Transformation Kinetics of Sodium Carbonate to Bicarbonate",
pages = "494-481",
number = "4",
volume = "54",
doi = "10.2298/SOS2204481D",
url = "conv_1000"
}

Đorđević, N., Vlahović, M., Mihajlović, S., Martinović, S., Vušović, N. M.,& Šajić, J.L.. (2022). Fourier-Transform Infrared Spectroscopy Analysis of Mechanochemical Transformation Kinetics of Sodium Carbonate to Bicarbonate. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 54(4), 481-494.
https://doi.org/10.2298/SOS2204481D
conv_1000

Đorđević N, Vlahović M, Mihajlović S, Martinović S, Vušović NM, Šajić J. Fourier-Transform Infrared Spectroscopy Analysis of Mechanochemical Transformation Kinetics of Sodium Carbonate to Bicarbonate. in Science of Sintering. 2022;54(4):481-494.
doi:10.2298/SOS2204481D
conv_1000 .

Đorđević, Nataša, Vlahović, M., Mihajlović, Slavica, Martinović, S., Vušović, Nenad M., Šajić, J.L., "Fourier-Transform Infrared Spectroscopy Analysis of Mechanochemical Transformation Kinetics of Sodium Carbonate to Bicarbonate" in Science of Sintering, 54, no. 4 (2022):481-494,
https://doi.org/10.2298/SOS2204481D .,
conv_1000 .

TY  - CONF
AU  - Đorđević, Nataša
AU  - Vlahović, Milica
AU  - Mihajlović, Slavica
AU  - Martinović, Sanja
AU  - Vušović, Nenad
PY  - 2021
UR  - https://ritnms.itnms.ac.rs/handle/123456789/817
AB  - Sodium carbonate was mechanically activated for 7 minutes in a vibro mill at a frequency of 3000 oscillations per
minute. Activated samples were stored in the air at room conditions for 31 days. To monitor the kinetics of the
transformation process of sodium carbonate to bicarbonate, Fourier-transform infrared (FTIR) spectroscopy
analysis was used and was performed as a function of relaxation time for characteristic groups observed: CO3
2–,
HCO3
– and OH–. The obtained results provided kinetics parameters for the transformation of carbonate into
bicarbonate as a result of chemisorption of moisture and carbon dioxide from the atmosphere.
PB  - Belgrade : University of Belgrade, Faculty of Mechanical Engineering
PB  - Kragujevac : Serbian Tribology Society
C3  - 10th International Conference on Tribology-BALKANTRIB’20
T1  - FTIR spectroscopy analysis of mechanochemically activated Na2CO3 during relaxation time
EP  - 202
SP  - 201
ER  - 

@conference{
author = "Đorđević, Nataša and Vlahović, Milica and Mihajlović, Slavica and Martinović, Sanja and Vušović, Nenad",
year = "2021",
abstract = "Sodium carbonate was mechanically activated for 7 minutes in a vibro mill at a frequency of 3000 oscillations per
minute. Activated samples were stored in the air at room conditions for 31 days. To monitor the kinetics of the
transformation process of sodium carbonate to bicarbonate, Fourier-transform infrared (FTIR) spectroscopy
analysis was used and was performed as a function of relaxation time for characteristic groups observed: CO3
2–,
HCO3
– and OH–. The obtained results provided kinetics parameters for the transformation of carbonate into
bicarbonate as a result of chemisorption of moisture and carbon dioxide from the atmosphere.",
publisher = "Belgrade : University of Belgrade, Faculty of Mechanical Engineering, Kragujevac : Serbian Tribology Society",
journal = "10th International Conference on Tribology-BALKANTRIB’20",
title = "FTIR spectroscopy analysis of mechanochemically activated Na2CO3 during relaxation time",
pages = "202-201"
}

Đorđević, N., Vlahović, M., Mihajlović, S., Martinović, S.,& Vušović, N.. (2021). FTIR spectroscopy analysis of mechanochemically activated Na2CO3 during relaxation time. in 10th International Conference on Tribology-BALKANTRIB’20
Belgrade : University of Belgrade, Faculty of Mechanical Engineering., 201-202.

Đorđević N, Vlahović M, Mihajlović S, Martinović S, Vušović N. FTIR spectroscopy analysis of mechanochemically activated Na2CO3 during relaxation time. in 10th International Conference on Tribology-BALKANTRIB’20. 2021;:201-202..

Đorđević, Nataša, Vlahović, Milica, Mihajlović, Slavica, Martinović, Sanja, Vušović, Nenad, "FTIR spectroscopy analysis of mechanochemically activated Na2CO3 during relaxation time" in 10th International Conference on Tribology-BALKANTRIB’20 (2021):201-202.

TY  - JOUR
AU  - Mihajlović, Slavica
AU  - Vlahović, Milica
AU  - Vušović, Nenad M.
AU  - Đorđević, Nataša
AU  - Jovanović, Marina N.
PY  - 2021
UR  - https://ritnms.itnms.ac.rs/handle/123456789/565
AB  - To provide the quality required for its use, raw kaolin must be subjected to certain processing procedures like delamination which is applied to the layered structure materials. The aim of this research is to determine the possibility of performing delamination in the extruder and to estimate the effects of this process on the physico-chemical properties of kaolin. The results showed that delamination can be efficiently realized in the extruder by shearing densely packed layers under the influence of friction force and added Na2CO3 electrolyte. The crystal structure of the system was thus disrupted. This was confirmed by the Hinckley index (HI) decrease and by the dilatometric characteristics changes during heating. The particle size was reduced and, furthermore, new adsorption centers were formed, which led to an increase in the total cation exchange capacity (CEC). The plasticity of kaolin decreased with the increasing delamination degree, as well as the amount of water required for plastic processing, which is favorable in drying ceramic products.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Effect of Delamination on Physico-Chemical Properties of Kaolin
EP  - 266
IS  - 2
SP  - 253
VL  - 53
DO  - 10.2298/SOS2102253M
UR  - conv_914
ER  - 

@article{
author = "Mihajlović, Slavica and Vlahović, Milica and Vušović, Nenad M. and Đorđević, Nataša and Jovanović, Marina N.",
year = "2021",
abstract = "To provide the quality required for its use, raw kaolin must be subjected to certain processing procedures like delamination which is applied to the layered structure materials. The aim of this research is to determine the possibility of performing delamination in the extruder and to estimate the effects of this process on the physico-chemical properties of kaolin. The results showed that delamination can be efficiently realized in the extruder by shearing densely packed layers under the influence of friction force and added Na2CO3 electrolyte. The crystal structure of the system was thus disrupted. This was confirmed by the Hinckley index (HI) decrease and by the dilatometric characteristics changes during heating. The particle size was reduced and, furthermore, new adsorption centers were formed, which led to an increase in the total cation exchange capacity (CEC). The plasticity of kaolin decreased with the increasing delamination degree, as well as the amount of water required for plastic processing, which is favorable in drying ceramic products.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Effect of Delamination on Physico-Chemical Properties of Kaolin",
pages = "266-253",
number = "2",
volume = "53",
doi = "10.2298/SOS2102253M",
url = "conv_914"
}

Mihajlović, S., Vlahović, M., Vušović, N. M., Đorđević, N.,& Jovanović, M. N.. (2021). Effect of Delamination on Physico-Chemical Properties of Kaolin. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 53(2), 253-266.
https://doi.org/10.2298/SOS2102253M
conv_914

Mihajlović S, Vlahović M, Vušović NM, Đorđević N, Jovanović MN. Effect of Delamination on Physico-Chemical Properties of Kaolin. in Science of Sintering. 2021;53(2):253-266.
doi:10.2298/SOS2102253M
conv_914 .

Mihajlović, Slavica, Vlahović, Milica, Vušović, Nenad M., Đorđević, Nataša, Jovanović, Marina N., "Effect of Delamination on Physico-Chemical Properties of Kaolin" in Science of Sintering, 53, no. 2 (2021):253-266,
https://doi.org/10.2298/SOS2102253M .,
conv_914 .

TY  - JOUR
AU  - Božinović, Kristina
AU  - Štrbac, Nada
AU  - Mitovski, Aleksandra
AU  - Sokić, Miroslav
AU  - Minić, Duško
AU  - Marković, Branislav
AU  - Stojanović, Jovica
PY  - 2021
UR  - https://ritnms.itnms.ac.rs/handle/123456789/569
AB  - The roasting of sulfide ores and concentrates is one of the most important steps in pyrometallurgical metal production from primary raw materials, due to the necessity of excess sulfur removal, present in the virgin material. Pentlandite is one of the main sources for nickel pyrometallurgical production. The knowledge of its reaction mechanism, products distribution during oxidation and reaction kinetics is important for optimizing the production process. Raw pentlandite-bearing ore from the Levack mine (Ontario, Canada) was subjected to oxidative roasting in the air atmosphere. A chemical analysis of the initial sample was conducted according to EDXRF (Energy-Dispersive X-ray Fluorescence) and AAS (Atomic Adsorption Spectrometry) results. The characterization of the initial sample and oxidation products was conducted by an XRD (X-ray Diffraction) and SEM/EDS (Scanning Electron Microscopy with Energy Dispersive Spectrometry) analysis. Thermodynamic calculations, a phase analysis and construction of Kellogg diagrams for Ni-S-O and Fe-S-O systems at 298 K, 773 K, 923 K and 1073 K were used for proposing the theoretical reaction mechanism. A thermal analysis (TG/DTA-Thermogravimetric and Differential Thermal Analyses) was conducted in temperature range 298-1273 K, under a heating rate of 15 degrees min(-1). A kinetic analysis was conducted according to the non-isothermal method of Daniels and Borchardt, under a heating rate of 15 degrees min(-1). Calculated activation energies of 113 kJ mol(-1), 146 kJ mol(-1) and 356 kJ mol(-1) for three oxidation stages imply that in every examined stage of the oxidation process, temperature is a dominant factor determining the reaction rate.
PB  - MDPI, Basel
T2  - Metals
T1  - Thermal Decomposition and Kinetics of Pentlandite-Bearing Ore Oxidation in the Air Atmosphere
IS  - 9
VL  - 11
DO  - 10.3390/met11091364
UR  - conv_918
ER  - 

@article{
author = "Božinović, Kristina and Štrbac, Nada and Mitovski, Aleksandra and Sokić, Miroslav and Minić, Duško and Marković, Branislav and Stojanović, Jovica",
year = "2021",
abstract = "The roasting of sulfide ores and concentrates is one of the most important steps in pyrometallurgical metal production from primary raw materials, due to the necessity of excess sulfur removal, present in the virgin material. Pentlandite is one of the main sources for nickel pyrometallurgical production. The knowledge of its reaction mechanism, products distribution during oxidation and reaction kinetics is important for optimizing the production process. Raw pentlandite-bearing ore from the Levack mine (Ontario, Canada) was subjected to oxidative roasting in the air atmosphere. A chemical analysis of the initial sample was conducted according to EDXRF (Energy-Dispersive X-ray Fluorescence) and AAS (Atomic Adsorption Spectrometry) results. The characterization of the initial sample and oxidation products was conducted by an XRD (X-ray Diffraction) and SEM/EDS (Scanning Electron Microscopy with Energy Dispersive Spectrometry) analysis. Thermodynamic calculations, a phase analysis and construction of Kellogg diagrams for Ni-S-O and Fe-S-O systems at 298 K, 773 K, 923 K and 1073 K were used for proposing the theoretical reaction mechanism. A thermal analysis (TG/DTA-Thermogravimetric and Differential Thermal Analyses) was conducted in temperature range 298-1273 K, under a heating rate of 15 degrees min(-1). A kinetic analysis was conducted according to the non-isothermal method of Daniels and Borchardt, under a heating rate of 15 degrees min(-1). Calculated activation energies of 113 kJ mol(-1), 146 kJ mol(-1) and 356 kJ mol(-1) for three oxidation stages imply that in every examined stage of the oxidation process, temperature is a dominant factor determining the reaction rate.",
publisher = "MDPI, Basel",
journal = "Metals",
title = "Thermal Decomposition and Kinetics of Pentlandite-Bearing Ore Oxidation in the Air Atmosphere",
number = "9",
volume = "11",
doi = "10.3390/met11091364",
url = "conv_918"
}

Božinović, K., Štrbac, N., Mitovski, A., Sokić, M., Minić, D., Marković, B.,& Stojanović, J.. (2021). Thermal Decomposition and Kinetics of Pentlandite-Bearing Ore Oxidation in the Air Atmosphere. in Metals
MDPI, Basel., 11(9).
https://doi.org/10.3390/met11091364
conv_918

Božinović K, Štrbac N, Mitovski A, Sokić M, Minić D, Marković B, Stojanović J. Thermal Decomposition and Kinetics of Pentlandite-Bearing Ore Oxidation in the Air Atmosphere. in Metals. 2021;11(9).
doi:10.3390/met11091364
conv_918 .

Božinović, Kristina, Štrbac, Nada, Mitovski, Aleksandra, Sokić, Miroslav, Minić, Duško, Marković, Branislav, Stojanović, Jovica, "Thermal Decomposition and Kinetics of Pentlandite-Bearing Ore Oxidation in the Air Atmosphere" in Metals, 11, no. 9 (2021),
https://doi.org/10.3390/met11091364 .,
conv_918 .

TY  - JOUR
AU  - Štrbac, Nada
AU  - Sokić, Miroslav
AU  - Mitovski, Aleksandra
AU  - Gurešić, Dejan M.
AU  - Božinović, Kristina
AU  - Stojanović, Jovica
AU  - Tomović, Milica P.
PY  - 2020
UR  - https://ritnms.itnms.ac.rs/handle/123456789/549
AB  - Bizmut (III) sulfid je poslednjih godina naširoko istraživan zbog svoje primene, ali je malo akcenta dato na istraživanja u pogledu njegovog ponašanja na povišenim temperaturama. Ovo je od velike važnosti, uzevši u obzir da se bizmut, u obliku Bi2S3 nalazi u sulfidnim koncentratima bakra i važi za jednu od najštetnijih komponenti, zajedno sa olovom, arsenom i antimonom. Uklanjanje ovih supstanci jedan je od osnovnih zadataka u procesima pirometalurške ekstrakcija bakra, kako bi se na kraju proizvodnog procesa dobio metal visoke čistoće. U cilju boljeg razumevanja ponašanja bizmut (III) sulfida pri oksidaciji na povišenim temperaturama, u ovom radu je izvršena karakterizacija sintetisanog uzoraka Bi2S3 na sobnoj temperaturi i produkata oksidacije na 500°C metodom rentgenske difrakcije (XRD), kao i termodinamička, termijska i kinetička analiza procesa oksidacije Bi2S3 na povišenim temperaturama. Da bi se razumelo ponašanje Bi2S3 tokom oksidacije i raspodela produkata oksidacije, konstruisani su dijagrami stabilnosti faza u sistemu Bi-S-O na različitim temperaturama i proračunate su vrednosti promene Gibbsove slobodne energije na 400°C i 1000°C. Kinetička analiza procesa oksidacije Bi2S3, urađena po metodi Kissingera u neizotermskim uslovima, pokazala je da je oksidacija bizmutinita hemijski kontrolisani proces.
AB  - Bismuth (III) sulfide has been widely researched in recent years due to its application, but little emphasis has been placed on research regarding its behavior at elevated temperatures. This is of great importance, considering that bismuth, in the form of Bi2S3, is found in copper sulfide concentrates and is considered one of the most harmful components, along with lead, arsenic and antimony. The removal of these substances is one of the basic tasks in the processes of pyrometallurgical extraction of copper, in order to obtain a high purity metal. In order to better understand the behavior of bismuth (III) sulfide during oxidation at elevated temperatures, this paper characterized the synthesized sample of Bi2S3 at room temperature and the oxidation products at 500 °C by X-Ray diffraction (XRD), as well as thermodynamic, thermal and kinetic analysis of the oxidation process of Bi2S3 at elevated temperatures. In order to understand the behavior of Bi2S3 during oxidation and the distribution of oxidation products, phase stability diagrams in the Bi-S-O system were constructed at different temperatures and the values of the Gibbs free energy change at 400 °C and 1000 °C were calculated. Kinetic analysis of Bi2S3 oxidation process was performed by Kissingers method in non-isothermal conditions.
PB  - Savez inženjera i tehničara Srbije, Beograd
T2  - Tehnika
T1  - Ispitivanje procesa oksidacije Bi2S3 na povišenim temperaturama u atmosferi vazduha
T1  - Investigation of Bi2S3 oxidation process at elevated temperatures in the air atmosphere
EP  - 593
IS  - 5
SP  - 587
VL  - 75
DO  - 10.5937/tehnika2005587S
UR  - conv_30
ER  - 

@article{
author = "Štrbac, Nada and Sokić, Miroslav and Mitovski, Aleksandra and Gurešić, Dejan M. and Božinović, Kristina and Stojanović, Jovica and Tomović, Milica P.",
year = "2020",
abstract = "Bizmut (III) sulfid je poslednjih godina naširoko istraživan zbog svoje primene, ali je malo akcenta dato na istraživanja u pogledu njegovog ponašanja na povišenim temperaturama. Ovo je od velike važnosti, uzevši u obzir da se bizmut, u obliku Bi2S3 nalazi u sulfidnim koncentratima bakra i važi za jednu od najštetnijih komponenti, zajedno sa olovom, arsenom i antimonom. Uklanjanje ovih supstanci jedan je od osnovnih zadataka u procesima pirometalurške ekstrakcija bakra, kako bi se na kraju proizvodnog procesa dobio metal visoke čistoće. U cilju boljeg razumevanja ponašanja bizmut (III) sulfida pri oksidaciji na povišenim temperaturama, u ovom radu je izvršena karakterizacija sintetisanog uzoraka Bi2S3 na sobnoj temperaturi i produkata oksidacije na 500°C metodom rentgenske difrakcije (XRD), kao i termodinamička, termijska i kinetička analiza procesa oksidacije Bi2S3 na povišenim temperaturama. Da bi se razumelo ponašanje Bi2S3 tokom oksidacije i raspodela produkata oksidacije, konstruisani su dijagrami stabilnosti faza u sistemu Bi-S-O na različitim temperaturama i proračunate su vrednosti promene Gibbsove slobodne energije na 400°C i 1000°C. Kinetička analiza procesa oksidacije Bi2S3, urađena po metodi Kissingera u neizotermskim uslovima, pokazala je da je oksidacija bizmutinita hemijski kontrolisani proces., Bismuth (III) sulfide has been widely researched in recent years due to its application, but little emphasis has been placed on research regarding its behavior at elevated temperatures. This is of great importance, considering that bismuth, in the form of Bi2S3, is found in copper sulfide concentrates and is considered one of the most harmful components, along with lead, arsenic and antimony. The removal of these substances is one of the basic tasks in the processes of pyrometallurgical extraction of copper, in order to obtain a high purity metal. In order to better understand the behavior of bismuth (III) sulfide during oxidation at elevated temperatures, this paper characterized the synthesized sample of Bi2S3 at room temperature and the oxidation products at 500 °C by X-Ray diffraction (XRD), as well as thermodynamic, thermal and kinetic analysis of the oxidation process of Bi2S3 at elevated temperatures. In order to understand the behavior of Bi2S3 during oxidation and the distribution of oxidation products, phase stability diagrams in the Bi-S-O system were constructed at different temperatures and the values of the Gibbs free energy change at 400 °C and 1000 °C were calculated. Kinetic analysis of Bi2S3 oxidation process was performed by Kissingers method in non-isothermal conditions.",
publisher = "Savez inženjera i tehničara Srbije, Beograd",
journal = "Tehnika",
title = "Ispitivanje procesa oksidacije Bi2S3 na povišenim temperaturama u atmosferi vazduha, Investigation of Bi2S3 oxidation process at elevated temperatures in the air atmosphere",
pages = "593-587",
number = "5",
volume = "75",
doi = "10.5937/tehnika2005587S",
url = "conv_30"
}

Štrbac, N., Sokić, M., Mitovski, A., Gurešić, D. M., Božinović, K., Stojanović, J.,& Tomović, M. P.. (2020). Ispitivanje procesa oksidacije Bi2S3 na povišenim temperaturama u atmosferi vazduha. in Tehnika
Savez inženjera i tehničara Srbije, Beograd., 75(5), 587-593.
https://doi.org/10.5937/tehnika2005587S
conv_30

Štrbac N, Sokić M, Mitovski A, Gurešić DM, Božinović K, Stojanović J, Tomović MP. Ispitivanje procesa oksidacije Bi2S3 na povišenim temperaturama u atmosferi vazduha. in Tehnika. 2020;75(5):587-593.
doi:10.5937/tehnika2005587S
conv_30 .

Štrbac, Nada, Sokić, Miroslav, Mitovski, Aleksandra, Gurešić, Dejan M., Božinović, Kristina, Stojanović, Jovica, Tomović, Milica P., "Ispitivanje procesa oksidacije Bi2S3 na povišenim temperaturama u atmosferi vazduha" in Tehnika, 75, no. 5 (2020):587-593,
https://doi.org/10.5937/tehnika2005587S .,
conv_30 .

TY  - JOUR
AU  - Bogdanović, Grozdanka
AU  - Petrović, Sanja
AU  - Sokić, Miroslav
AU  - Antonijević, Milan M.
PY  - 2020
UR  - https://ritnms.itnms.ac.rs/handle/123456789/537
AB  - In the modern practice of copper production, more attention is increasingly being given to the possibility of treating low-percentage sulphide ores that cannot be treated with conventional procedures (crushing, grinding, flotation). In addition, the processes of obtaining copper from complex sulphide concentrates, which cannot undergo pyrometallurgical processing, are increasingly being investigated. In most cases, the extraction of copper from such raw materials is achieved by applying the leaching procedures. Since chalcopyrite (CuFeS2) is the most abundant copper sulphide mineral, a great part of the research is focused on studying the behaviour of chalcopyrite in the leaching process, because processes of copper extraction from increasingly poor raw materials may be created using results of these studies. In addition, the main goal of these researches is to investigate the kinetics and mechanism of oxidation of chalcopyrite under the influence of various oxidants (O-2, Fe3-, H2O2, chlorate ions, etc.) and in the same time obtaining data necessary for the development of copper production process that could satisfy increasingly technological, economic and environmental stringent criteria. This paper presents the existing knowledge of chalcopyrite leaching and phenomena that follow chalcopyrite oxidation in acidic sulphate and chloride solutions.
PB  - Savez inženjera metalurgije Srbije, Beograd
T2  - Metallurgical & Materials Engineering
T1  - Chalcopyrite leaching in acid media: a review
EP  - 198
IS  - 2
SP  - 177
VL  - 26
DO  - 10.30544/526
UR  - conv_888
ER  - 

@article{
author = "Bogdanović, Grozdanka and Petrović, Sanja and Sokić, Miroslav and Antonijević, Milan M.",
year = "2020",
abstract = "In the modern practice of copper production, more attention is increasingly being given to the possibility of treating low-percentage sulphide ores that cannot be treated with conventional procedures (crushing, grinding, flotation). In addition, the processes of obtaining copper from complex sulphide concentrates, which cannot undergo pyrometallurgical processing, are increasingly being investigated. In most cases, the extraction of copper from such raw materials is achieved by applying the leaching procedures. Since chalcopyrite (CuFeS2) is the most abundant copper sulphide mineral, a great part of the research is focused on studying the behaviour of chalcopyrite in the leaching process, because processes of copper extraction from increasingly poor raw materials may be created using results of these studies. In addition, the main goal of these researches is to investigate the kinetics and mechanism of oxidation of chalcopyrite under the influence of various oxidants (O-2, Fe3-, H2O2, chlorate ions, etc.) and in the same time obtaining data necessary for the development of copper production process that could satisfy increasingly technological, economic and environmental stringent criteria. This paper presents the existing knowledge of chalcopyrite leaching and phenomena that follow chalcopyrite oxidation in acidic sulphate and chloride solutions.",
publisher = "Savez inženjera metalurgije Srbije, Beograd",
journal = "Metallurgical & Materials Engineering",
title = "Chalcopyrite leaching in acid media: a review",
pages = "198-177",
number = "2",
volume = "26",
doi = "10.30544/526",
url = "conv_888"
}

Bogdanović, G., Petrović, S., Sokić, M.,& Antonijević, M. M.. (2020). Chalcopyrite leaching in acid media: a review. in Metallurgical & Materials Engineering
Savez inženjera metalurgije Srbije, Beograd., 26(2), 177-198.
https://doi.org/10.30544/526
conv_888

Bogdanović G, Petrović S, Sokić M, Antonijević MM. Chalcopyrite leaching in acid media: a review. in Metallurgical & Materials Engineering. 2020;26(2):177-198.
doi:10.30544/526
conv_888 .

Bogdanović, Grozdanka, Petrović, Sanja, Sokić, Miroslav, Antonijević, Milan M., "Chalcopyrite leaching in acid media: a review" in Metallurgical & Materials Engineering, 26, no. 2 (2020):177-198,
https://doi.org/10.30544/526 .,
conv_888 .