TY  - CONF
AU  - Sokić, Miroslav
AU  - Marković, Branislav
AU  - Matković, Vladislav
AU  - Manojlović, Vaso
PY  - 2021
UR  - https://ritnms.itnms.ac.rs/handle/123456789/956
AB  - This paper present results of experimental investigations of metallic calcium production from Serbian carbonate raw materials by aluminothermic process and the basic operating parameters of the particular technological phases. The limestone with high content of Mg, Na and K was used in the study. X-ray analysis reveals that samples contain mainly calcite with small amount of dolomite. The DTA/TG analysis of the limestone samples from site “Čačak” (samples C I and C II) and chemical composition of limestone samples are presented in the graphical abstract. At DTA curves of both C I and C II samples sharp endothermic peaks are noticed, related to the dissociation process followed by the endothermic heat effect. Since the DTA curves show only one clearly defined peak, it can be concluded that the calcium carbonate is solely present in the raw materials in the form of calcite, while aragonite is not present. At first, the effects of temperature, time and granulometry on the calcium carbonate calcination were examined. The dissociation process was completed in 10–15 min at 1200 °C, and the dissociation rate increased with decreasing particle size down to 5 mm. Afterwards, the aluminothermic reduction process of calcium oxide was investigated. At a temperature of 1200 °C and vacuum of at least 3 kPa, the reduction process was completed within 2 h. The chemical composition of calcium oxide and metallic calcium showed increased content of magnesium oxide and alkaline oxides (especially sodium).
PB  - Kosovska Mitrovica : Fakultet Tehničkih nauka
C3  - "Deseti simpozijum o termodinamici i faznim dijagramima"
T1  - Application of thermal analysis in characterization of limestone for obtaining of the metallic calcium
EP  - 34
SP  - 33
ER  - 

@conference{
author = "Sokić, Miroslav and Marković, Branislav and Matković, Vladislav and Manojlović, Vaso",
year = "2021",
abstract = "This paper present results of experimental investigations of metallic calcium production from Serbian carbonate raw materials by aluminothermic process and the basic operating parameters of the particular technological phases. The limestone with high content of Mg, Na and K was used in the study. X-ray analysis reveals that samples contain mainly calcite with small amount of dolomite. The DTA/TG analysis of the limestone samples from site “Čačak” (samples C I and C II) and chemical composition of limestone samples are presented in the graphical abstract. At DTA curves of both C I and C II samples sharp endothermic peaks are noticed, related to the dissociation process followed by the endothermic heat effect. Since the DTA curves show only one clearly defined peak, it can be concluded that the calcium carbonate is solely present in the raw materials in the form of calcite, while aragonite is not present. At first, the effects of temperature, time and granulometry on the calcium carbonate calcination were examined. The dissociation process was completed in 10–15 min at 1200 °C, and the dissociation rate increased with decreasing particle size down to 5 mm. Afterwards, the aluminothermic reduction process of calcium oxide was investigated. At a temperature of 1200 °C and vacuum of at least 3 kPa, the reduction process was completed within 2 h. The chemical composition of calcium oxide and metallic calcium showed increased content of magnesium oxide and alkaline oxides (especially sodium).",
publisher = "Kosovska Mitrovica : Fakultet Tehničkih nauka",
journal = ""Deseti simpozijum o termodinamici i faznim dijagramima"",
title = "Application of thermal analysis in characterization of limestone for obtaining of the metallic calcium",
pages = "34-33"
}

Sokić, M., Marković, B., Matković, V.,& Manojlović, V.. (2021). Application of thermal analysis in characterization of limestone for obtaining of the metallic calcium. in "Deseti simpozijum o termodinamici i faznim dijagramima"
Kosovska Mitrovica : Fakultet Tehničkih nauka., 33-34.

Sokić M, Marković B, Matković V, Manojlović V. Application of thermal analysis in characterization of limestone for obtaining of the metallic calcium. in "Deseti simpozijum o termodinamici i faznim dijagramima". 2021;:33-34..

Sokić, Miroslav, Marković, Branislav, Matković, Vladislav, Manojlović, Vaso, "Application of thermal analysis in characterization of limestone for obtaining of the metallic calcium" in "Deseti simpozijum o termodinamici i faznim dijagramima" (2021):33-34.