Hydrometallurgical processes offer a great potential for treating chalcopyrite ores and concentrates, and it results in increased metal recoveries and reduced air pollution hazards. In recent years interest for application of various reagents in a hydrometallurgical processing of sulphide concentrates has increased. The objective of this work was to examine the leaching of the chalcopyrite concentrate, from "Rudnik" flotation plant, by sodium nitrate in sulphuric acid media. The probabilities of various chemical reactions occurring was based upon literature data, thermodynamic analysis, and the products formed during the leaching process. The influence of various parameters was studied to optimize the conditions and to determine the kinetics of the reaction. An increase in temperature, sulphuric acid and sodium nitrate concentration, and decrease in stirring speed and particle size, enhanced the leaching rate of copper. The experimental data were best fitted by a mixed control kinetic ...model. An activation energy of 83 kJ/mol was found. Elemental sulphur was formed as the main leaching product and tended to inhibit the leaching rate. The leaching mechanism was confirmed by characterizing the concentrate and the leach residue using XRD and SEM/EDX analysis.
TY - JOUR
AU - Sokić, Miroslav
AU - Marković, Branislav
AU - Živković, Dragana
PY - 2009
UR - https://ritnms.itnms.ac.rs/handle/123456789/150
AB - Hydrometallurgical processes offer a great potential for treating chalcopyrite ores and concentrates, and it results in increased metal recoveries and reduced air pollution hazards. In recent years interest for application of various reagents in a hydrometallurgical processing of sulphide concentrates has increased. The objective of this work was to examine the leaching of the chalcopyrite concentrate, from "Rudnik" flotation plant, by sodium nitrate in sulphuric acid media. The probabilities of various chemical reactions occurring was based upon literature data, thermodynamic analysis, and the products formed during the leaching process. The influence of various parameters was studied to optimize the conditions and to determine the kinetics of the reaction. An increase in temperature, sulphuric acid and sodium nitrate concentration, and decrease in stirring speed and particle size, enhanced the leaching rate of copper. The experimental data were best fitted by a mixed control kinetic model. An activation energy of 83 kJ/mol was found. Elemental sulphur was formed as the main leaching product and tended to inhibit the leaching rate. The leaching mechanism was confirmed by characterizing the concentrate and the leach residue using XRD and SEM/EDX analysis.
PB - Elsevier Science Bv, Amsterdam
T2 - Hydrometallurgy
T1 - Kinetics of chalcopyrite leaching by sodium nitrate in sulphuric acid
EP - 279
IS - 3-4
SP - 273
VL - 95
DO - 10.1016/j.hydromet.2008.06.012
UR - conv_554
ER -
@article{
author = "Sokić, Miroslav and Marković, Branislav and Živković, Dragana",
year = "2009",
abstract = "Hydrometallurgical processes offer a great potential for treating chalcopyrite ores and concentrates, and it results in increased metal recoveries and reduced air pollution hazards. In recent years interest for application of various reagents in a hydrometallurgical processing of sulphide concentrates has increased. The objective of this work was to examine the leaching of the chalcopyrite concentrate, from "Rudnik" flotation plant, by sodium nitrate in sulphuric acid media. The probabilities of various chemical reactions occurring was based upon literature data, thermodynamic analysis, and the products formed during the leaching process. The influence of various parameters was studied to optimize the conditions and to determine the kinetics of the reaction. An increase in temperature, sulphuric acid and sodium nitrate concentration, and decrease in stirring speed and particle size, enhanced the leaching rate of copper. The experimental data were best fitted by a mixed control kinetic model. An activation energy of 83 kJ/mol was found. Elemental sulphur was formed as the main leaching product and tended to inhibit the leaching rate. The leaching mechanism was confirmed by characterizing the concentrate and the leach residue using XRD and SEM/EDX analysis.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Hydrometallurgy",
title = "Kinetics of chalcopyrite leaching by sodium nitrate in sulphuric acid",
pages = "279-273",
number = "3-4",
volume = "95",
doi = "10.1016/j.hydromet.2008.06.012",
url = "conv_554"
}
Sokić, M., Marković, B.,& Živković, D.. (2009). Kinetics of chalcopyrite leaching by sodium nitrate in sulphuric acid. in Hydrometallurgy
Elsevier Science Bv, Amsterdam., 95(3-4), 273-279.
https://doi.org/10.1016/j.hydromet.2008.06.012
conv_554
Sokić M, Marković B, Živković D. Kinetics of chalcopyrite leaching by sodium nitrate in sulphuric acid. in Hydrometallurgy. 2009;95(3-4):273-279.
doi:10.1016/j.hydromet.2008.06.012
conv_554 .
Sokić, Miroslav, Marković, Branislav, Živković, Dragana, "Kinetics of chalcopyrite leaching by sodium nitrate in sulphuric acid" in Hydrometallurgy, 95, no. 3-4 (2009):273-279,
https://doi.org/10.1016/j.hydromet.2008.06.012 .,
conv_554 .
