Finely grained samples of copper(I) sulphide were leached by CaCl2·2H2O solution with added HCl and the introduction of gaseous oxygen. The occurrence probability of chemical reactions was analyzed based on literature and products, which were formed during the process, and the overall leaching reaction was defined. The effect of temperature, concentration of CaCl2·2H2O, HCl and total chloride ions, stirring speed, phase ratio and time, on the leaching degree of copper was studied. The quantity of copper dissolved increases with the increase of the values of all the parameters. The role of chloride ions is to disrupt the passivating sulphur layer on the particle surface, by promoting the formation of crystalline sulphur rather than a crypto-crystalline or amorphous product. It was concluded that the leaching reaction is second order, with respect to the concentration of total chloride ions. Experimental results show that the leaching mechanism is very complex. By using appropriate mathe...matical kinetic models, it is found that the leaching rate is diffusion-controlled.
TY - JOUR
AU - Vračar, Rajko Ž.
AU - Parezanović, Ivana S.
AU - Cerović, Katarina P.
PY - 2000
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5304
AB - Finely grained samples of copper(I) sulphide were leached by CaCl2·2H2O solution with added HCl and the introduction of gaseous oxygen. The occurrence probability of chemical reactions was analyzed based on literature and products, which were formed during the process, and the overall leaching reaction was defined. The effect of temperature, concentration of CaCl2·2H2O, HCl and total chloride ions, stirring speed, phase ratio and time, on the leaching degree of copper was studied. The quantity of copper dissolved increases with the increase of the values of all the parameters. The role of chloride ions is to disrupt the passivating sulphur layer on the particle surface, by promoting the formation of crystalline sulphur rather than a crypto-crystalline or amorphous product. It was concluded that the leaching reaction is second order, with respect to the concentration of total chloride ions. Experimental results show that the leaching mechanism is very complex. By using appropriate mathematical kinetic models, it is found that the leaching rate is diffusion-controlled.
PB - Elsevier
T2 - Hydrometallurgy
T1 - Leaching of copper(I) sulfide in calcium chloride solution
EP - 267
IS - 3
SP - 261
VL - 58
DO - 10.1016/S0304-386X(00)00137-7
ER -
@article{
author = "Vračar, Rajko Ž. and Parezanović, Ivana S. and Cerović, Katarina P.",
year = "2000",
abstract = "Finely grained samples of copper(I) sulphide were leached by CaCl2·2H2O solution with added HCl and the introduction of gaseous oxygen. The occurrence probability of chemical reactions was analyzed based on literature and products, which were formed during the process, and the overall leaching reaction was defined. The effect of temperature, concentration of CaCl2·2H2O, HCl and total chloride ions, stirring speed, phase ratio and time, on the leaching degree of copper was studied. The quantity of copper dissolved increases with the increase of the values of all the parameters. The role of chloride ions is to disrupt the passivating sulphur layer on the particle surface, by promoting the formation of crystalline sulphur rather than a crypto-crystalline or amorphous product. It was concluded that the leaching reaction is second order, with respect to the concentration of total chloride ions. Experimental results show that the leaching mechanism is very complex. By using appropriate mathematical kinetic models, it is found that the leaching rate is diffusion-controlled.",
publisher = "Elsevier",
journal = "Hydrometallurgy",
title = "Leaching of copper(I) sulfide in calcium chloride solution",
pages = "267-261",
number = "3",
volume = "58",
doi = "10.1016/S0304-386X(00)00137-7"
}
Vračar, R. Ž., Parezanović, I. S.,& Cerović, K. P.. (2000). Leaching of copper(I) sulfide in calcium chloride solution. in Hydrometallurgy
Elsevier., 58(3), 261-267.
https://doi.org/10.1016/S0304-386X(00)00137-7
Vračar RŽ, Parezanović IS, Cerović KP. Leaching of copper(I) sulfide in calcium chloride solution. in Hydrometallurgy. 2000;58(3):261-267.
doi:10.1016/S0304-386X(00)00137-7 .
Vračar, Rajko Ž., Parezanović, Ivana S., Cerović, Katarina P., "Leaching of copper(I) sulfide in calcium chloride solution" in Hydrometallurgy, 58, no. 3 (2000):261-267,
https://doi.org/10.1016/S0304-386X(00)00137-7 . .
