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 .