Products

leaching kinetics of copper from

Investigation of Leaching Kinetics of Copper from ...

26/04/2012  The production of metallic copper from low-grade copper ores is generally carried out by hydrometallurgical methods. Leaching is the first prerequisite of any hydrometallurgical process. Solutions containing ammonia may allow for selective leaching of the copper from the ore. In this study, the leaching kinetics of malachite, which is an oxidized copper ore, in ammonium nitrate solutions

More

LEACHING KINETICS OF COPPER FROM CHALCOPYRITE

Leaching kinetics of copper from chalcopyrite concentrate in nitrous-sulfuric acid 403 samples, determined from measurements on an HORIBA/Partica LA-950V2 Particle Size Analyzer, was 35 μm. Ultrafine milling of the as-received material to 15 μm was performed using a ball mill. The size of the product was confirmed by particle size analysis. Results and Discussion Effects of parameters The ...

More

Leaching kinetics of copper from waste printed circuit ...

The leaching efficiency of copper was found to be lower in the combined reactor than that of the separate reactor. The dissolution kinetics of copper with electro-generated chlorine followed empirical logarithmic law controlled by surface layer diffusion. The leaching mechanism of copper was further corroborated by SEM-EDS study of the residue ...

More

[PDF] LEACHING KINETICS OF COPPER FROM CHALCOPYRITE ...

The kinetics were well correlated with the shrinking core model for the diffusion controlled mechanism with an apparent activation energy of 34.06 kJmol -1 . Elemental sulfur was the primary leaching product on the mineral surface, as confirmed using XRD and SEM/EDX. The semi-empirical equation explaining the reaction rate under the present conditions was expressed as follows: t T e C X ...

More

Kinetic study of copper leaching from chalcopyrite ...

01/01/2019  An alkaline glycine-peroxide system was used to leach copper from chalcopyrite. Leaching mechanisms were investigated by a suite of kinetic studies. The copper extraction decreased with increasing temperature. Copper sulfide or sulfate precipitates were found in

More

Kinetics of copper extraction from copper smelting slag by ...

15/06/2020  The extraction of copper from CSS by oxygen pressure acid leaching process is a solid–liquid-gas heterogeneous reaction system, the kinetics of mineral dissolution is mainly controlled by leaching agent diffusion through the boundary layer (external diffusion) and internal diffusion of solid product layer (mainly internal diffusion control), chemical reaction control on the surface of solid

More

LEACHING KINETICS OF CU, CO, ZN, PB AND FE FROM COPPER ...

LEACHING KINETICS OF CU, CO, ZN, PB AND FE FROM COPPER SMELTING SLAGS COOLED IN DIFFERENT WAYS AFTER TAPPING N Tshiongo1, R K K Mbaya1, and K Maweja2 1Department of chemical and metallurgical engineering, Tshwane University of Technology, 2Element Six (pty) Ltd, DRL Abstract Slag samples from a copper smelting operation in a water jacket furnace from a DRC plant

More

Leaching kinetics of copper from natural chalcocite in ...

The leaching behavior of copper from natural chalcocite (Cu2S) particles in alkaline Na4EDTA solutions containing oxygen was examined at atmospheric pressure. The EDTA leaching process took place with consecutive reactions, where the solid product of the first reaction, covellite (CuS), became the reactant for the second. The copper leached into the alkaline solutions was immediately consumed ...

More

Leaching kinetics of copper from waste printed circuit ...

time and temperature on the dissolution of metals the kinetics of copper leaching was investigated and results are discussed in this paper. 2. Experimental 2.1. Materials The nonmagnetic portion of the waste PCBs of size 1.4–3.0 mm, free from the naked metallic component, was used as the sample for the leaching tests. Nonmagnetic metal component of waste PCBs was obtained by crushing and ...

More

LEACHING KINETICS OF COPPER FROM CHALCOPYRITE

Leaching kinetics of copper from chalcopyrite concentrate in nitrous-sulfuric acid 403 samples, determined from measurements on an HORIBA/Partica LA-950V2 Particle Size Analyzer, was 35 μm. Ultrafine milling of the as-received material to 15 μm was performed using a ball mill. The size of the product was confirmed by particle size analysis. Results and Discussion Effects of parameters The ...

More

Leaching kinetics of low-grade copper ore containing ...

Abstract: The leaching kinetics of copper from low-grade copper ore was investigated in ammonia-ammonium sulfate solution with sodium persulfate. The effect parameters of stirring speed, temperature, particle size, concentrations of ammonia, ammonium sulfate and sodium persulfate were determined.

More

Investigation of selective leaching and kinetics of copper ...

(2019). Investigation of selective leaching and kinetics of copper from malachite ore in aqueous perchloric acid solutions. Separation Science and Technology: Vol. 54, No. 5, pp. 815-827.

More

Figure 4 from LEACHING KINETICS OF COPPER FROM ...

DOI: 10.5277/PPMP140133 Corpus ID: 46475359. LEACHING KINETICS OF COPPER FROM CHALCOPYRITE CONCENTRATE IN NITROUS-SULFURIC ACID @article{Gk2014LEACHINGKO, title={LEACHING KINETICS OF COPPER FROM CHALCOPYRITE CONCENTRATE IN NITROUS-SULFURIC ACID}, author={{\"O}zge Akyol G{\"o}k and C. Anderson and Gorkem Cicekli and E. I.

More

Leaching kinetics of copper from chalcopyrite concentrate ...

LEACHING KINETICS OF COPPER FROM CHALCOPYRITE CONCENTRATE IN NITROUS-SULFURIC ACID Ozge GOK*, Corby G. ANDERSON**, Gorkem CICEKLI*, E. Ilknur COCEN* * ** Mining Engineering Dept., Faculty of Engineering, Dokuz Eylul University, Izmir, 35160, Turkey; e-mail: [email protected]) Department of Metallurgical and Materials Engineering, Colorado School of Mines, CO,

More

Leaching kinetics of electronic waste for the recovery of ...

26/10/2020  Electronic waste (e‐waste) contains metallic values that can be recovered by hydrometallurgical methods. This investigation addresses the leaching kinetics of e‐waste for the recovery of copper in H 2 SO 4 ‐H 2 O 2 media with the objective of determining the rate‐controlling step in monosize particle systems.

More

Bacterial leaching kinetics for copper dissolution from a ...

Bacterial leaching kinetics for copper dissolution from a ...

More

Innovations in Copper: Mining Extraction: Producing ...

Ferric sulfate, which is a powerful oxidizing agent, then oxidizes the copper sulfide minerals and the copper contained is then leached by the sulfuric acid formed. In the case of uranium, the ferric sulfate oxidizes tetravalent uranium oxide, which is insoluble in acid, to hexavalent uranium oxide, which is then leached by the sulfuric acid.

More

Leaching kinetics of copper from waste printed circuit ...

time and temperature on the dissolution of metals the kinetics of copper leaching was investigated and results are discussed in this paper. 2. Experimental 2.1. Materials The nonmagnetic portion of the waste PCBs of size 1.4–3.0 mm, free from the naked metallic component, was used as the sample for the leaching tests. Nonmagnetic metal component of

More

[PDF] Leaching kinetics of copper from waste printed ...

The leaching efficiency of copper was found to be lower in the combined reactor than that of the separate reactor. The dissolution kinetics of copper with electro-generated chlorine followed empirical logarithmic law controlled by surface layer diffusion. The leaching mechanism of copper was further corroborated by SEM-EDS study of the residue. The activation energy for copper leaching

More

Investigation of Leaching Kinetics of Copper from ...

The production of metallic copper from low-grade copper ores is generally carried out by hydrometallurgical methods. Leaching is the first prerequisite of any hydrometallurgical process. Solutions containing ammonia may allow for selective leaching of the copper from the ore. In this study, the leaching kinetics of malachite, which is an oxidized copper ore, in ammonium

More

Leaching kinetics of low-grade copper ore containing ...

Abstract: The leaching kinetics of copper from low-grade copper ore was investigated in ammonia-ammonium sulfate solution with sodium persulfate. The effect parameters of stirring speed, temperature, particle size, concentrations of ammonia, ammonium sulfate and sodium persulfate were determined. The results show that the leaching rate is nearly independent of

More

Figure 4 from LEACHING KINETICS OF COPPER FROM ...

DOI: 10.5277/PPMP140133 Corpus ID: 46475359. LEACHING KINETICS OF COPPER FROM CHALCOPYRITE CONCENTRATE IN NITROUS-SULFURIC ACID @article{Gk2014LEACHINGKO, title={LEACHING KINETICS OF COPPER FROM CHALCOPYRITE CONCENTRATE IN NITROUS-SULFURIC ACID}, author={{\"O}zge Akyol

More

THE GEOCHEMISTRY OF COPPER LEACHING

12/03/2012  kinetics and solubility in the leach solution. The degree to which the ore and gangue minerals are soluble in the leach solution and the rates at which they dissolve determine copper leach kinetics and acid consumption. Of the common rock-forming minerals, only quartz, rutile, and zircon are insoluble in leach solutions.

More

Investigation of selective leaching and kinetics of copper ...

(2019). Investigation of selective leaching and kinetics of copper from malachite ore in aqueous perchloric acid solutions. Separation Science and Technology: Vol. 54, No. 5, pp. 815-827.

More

Kinetic modeling of copper bioleaching from low-grade ore ...

28/05/2017  The kinetics of copper dissolution followed the shrinking core model, and the process was diffusion controlled at a pulp density of 5 g/mL. Nevertheless, at higher pulp densities, the process was controlled by chemical reaction. Keywords bioleaching kinetics modeling copper mesophilic bacteria This is a preview of subscription content, log in to check

More

Metals Special Issue : Leaching Kinetics of Valuable Metals

The best fit to a linear correlation was the chemical reaction equation that controls the kinetics for the leaching copper from chalcopyrite. The images obtained by SEM showed evidence of shrinking in the core model with the formation of a porous elemental sulfur product layer. Full article (This article belongs to the Special Issue Leaching Kinetics of Valuable Metals) Show

More

Solvometallurgical process for extraction of copper from ...

In sulfate media, the leaching kinetics are generally slow (several months) and the leaching of copper is difficult to be complete, due to the formation of passivation layers on the surface of chalcopyrite, such as solid sulfur and iron precipitate (e.g. jarosite). 1 In chloride media, the leaching rate is faster than that in sulfate media, due to the high solubility of salts in chloride

More

Leaching kinetics of copper from natural chalcocite in ...

The leaching behavior of copper from natural chalcocite (Cu2S) particles in alkaline Na4EDTA solutions containing oxygen was examined at atmospheric pressure. The EDTA leaching process took place with consecutive reactions, where the solid product of the first reaction, covellite (CuS), became the reactant for the second. The copper leached into the alkaline solutions was immediately consumed ...

More

Leaching kinetics of copper from waste printed circuit ...

The leaching efficiency of copper was found to be lower in the combined reactor than that of the separate reactor. The dissolution kinetics of copper with electro-generated chlorine followed empirical logarithmic law controlled by surface layer diffusion. The leaching mechanism of copper was further corroborated bySEM-EDSstudyoftheresidue.

More

[PDF] LEACHING KINETICS OF COPPER FROM CHALCOPYRITE ...

The kinetics were well correlated with the shrinking core model for the diffusion controlled mechanism with an apparent activation energy of 34.06 kJmol -1 . Elemental sulfur was the primary leaching product on the mineral surface, as confirmed using XRD and SEM/EDX. The semi-empirical equation explaining the reaction rate under the present conditions was expressed as follows: t T e C X ...

More

Leaching kinetics of low-grade copper ore containing ...

Abstract: The leaching kinetics of copper from low-grade copper ore was investigated in ammonia-ammonium sulfate solution with sodium persulfate. The effect parameters of stirring speed, temperature, particle size, concentrations of ammonia, ammonium sulfate and sodium persulfate were determined.

More

Investigation of selective leaching and kinetics of copper ...

(2019). Investigation of selective leaching and kinetics of copper from malachite ore in aqueous perchloric acid solutions. Separation Science and Technology: Vol. 54, No. 5, pp. 815-827.

More

Figure 11 from LEACHING KINETICS OF COPPER FROM ...

LEACHING KINETICS OF COPPER FROM CHALCOPYRITE CONCENTRATE IN NITROUS-SULFURIC ACID @article{Gk2014LEACHINGKO, title={LEACHING KINETICS OF COPPER FROM CHALCOPYRITE CONCENTRATE IN NITROUS-SULFURIC ACID}, author={{\"O}zge Akyol G{\"o}k and C. Anderson and Gorkem Cicekli and E. I. Cocen}, journal={Physicochemical Problems of Mineral

More

Leaching kinetics of copper from chalcopyrite concentrate ...

LEACHING KINETICS OF COPPER FROM CHALCOPYRITE CONCENTRATE IN NITROUS-SULFURIC ACID Ozge GOK*, Corby G. ANDERSON**, Gorkem CICEKLI*, E. Ilknur COCEN* * ** Mining Engineering Dept., Faculty of Engineering, Dokuz Eylul University, Izmir, 35160, Turkey; e-mail: [email protected]) Department of Metallurgical and Materials Engineering, Colorado School of Mines, CO,

More

Investigation of Leaching Kinetics of Copper from ...

In this study, the leaching kinetics of malachite, which is an oxidized copper ore, in ammonium nitrate solutions was examined. The effects of some experimental parameters on the leaching process were investigated, and a kinetic model to represent the effects of these parameters on the leaching rate was developed. It was determined that the leaching rate increased with increasing solution ...

More

Kinetic modeling of copper bioleaching from low-grade ore ...

28/05/2017  The copper recovery from low-grade copper sulfide ore was investigated using microbial leaching. Several parameters substantially affect the bioleaching of copper; among them, pulp density and nutrient media were selected for investigation.

More

Analysis of the effects of changes in operating conditions ...

Leaching is described by the kinetics of reaction, which depend on the concentrations of both acid and solids. In a similar manner, the extraction in the SX circuit is based on extraction isotherms that are dependent on the concentrations of both the copper and acid in solution.

More