Recovery of copper from the copper slag and copper slag flotation tailings by oxidative leaching

Urošević, Daniela; Dimitrijević, Mirjana; Janković, Z.; Antic, D.

doi:10.5277/ppmp150107

Cited by 11 publications

(7 citation statements)

References 15 publications

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“…They concluded that oxidant addition improves copper leaching, whereas it has adverse effects on the extraction of Co, Zn, and Fe. Urosevic et al 71 studied the effect of ferric sulfate or hydrogen peroxide on the leaching of copper slag and SFT using sulfuric acid. They reported that the highest copper extraction efficiency (63.4% when using 3 M H 2 O 2 and 1 M H 2 SO 4 ) was attained with hydrogen peroxide at room temperature.…”

Section: Resultsmentioning

confidence: 99%

“…Hence, copper slag flotation tailings (SFT) may contain copper as well as substantial amounts of cobalt and other metals . Some researchers have studied the extraction of metals from SFT by sulfuric acid leaching in the presence of oxidants. ,,, …”

Section: Introductionmentioning

confidence: 99%

“…58 Some researchers have studied the extraction of metals from SFT by sulfuric acid leaching in the presence of oxidants. 28,58,70,71 In this study, the extraction of Cu, Co, and Zn from SFT by hydrometallurgical treatment based on high-pressure oxidative leaching in sulfuric acid media was investigated. The presence of cobalt may add to the economic value of SFT.…”

Section: Introductionmentioning

confidence: 99%

“…58 Some researchers have studied the extraction of metals from SFT by sulfuric acid leaching in the presence of oxidants. 28 , 58 , 70 , 71 …”

Section: Introductionmentioning

confidence: 99%

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Pressure Leaching of Copper Slag Flotation Tailings in Oxygenated Sulfuric Acid Media

Seyrankaya

2022

ACS Omega

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In this study, a hydrometallurgical method for the recovery of copper, cobalt, and zinc from copper slag flotation tailings (SFT) was investigated. SFT contains large amounts of valuable metallic compounds, such as copper, cobalt, and zinc. A representative SFT sample containing 0.50% Cu, 0.148% Co, 3.93% Zn, and 39.50% Fe was used in experimental studies. High-pressure oxidative acid leaching of SFT was carried out to assess the effects of sulfuric acid concentration, oxygen partial pressure, reaction time, solid/liquid ratio, and temperature on the extraction of copper, cobalt, zinc, and iron. The dissolution of metals from the SFT sample increased with temperature and sulfuric acid concentration. However, high acid concentrations and high solid/liquid (S/L) ratios led to gel formation that caused filtration problems and inhibited metal dissolution. The optimum leaching conditions were found to be a leaching time of 90 min, an acid concentration of 250 kg/t, a temperature of 220 °C, an S/L ratio of 1:5, and an oxygen partial pressure of 0.7 MPa. Under these conditions, 93.1 ± 1.1% Cu, 96.3 ± 1.8% Co, and 92.3 ± 1.7% Zn were extracted. Iron dissolution was only 0.5 ± 0.1%. This hydrometallurgical process almost completely recovers valuable metals. In particular, cobalt, which is of great importance in the production of lithium-ion batteries, has been declared a critical metal by the United States, Canada, and the EU and was taken into solution with very high extraction efficiency (>95%). Additionally, oxygen partial pressure enhanced copper, cobalt, and zinc dissolution. When O2 was not introduced into the leaching system, the extraction efficiencies of Co, Cu, and Zn were approximately 24.5, 5.3, and 26.3%, respectively, after 2 h of leaching treatment.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…58 Some researchers have studied the extraction of metals from SFT by sulfuric acid leaching in the presence of oxidants. 28 , 58 , 70 , 71 …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Pressure Leaching of Copper Slag Flotation Tailings in Oxygenated Sulfuric Acid Media

Seyrankaya

2022

ACS Omega

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“…Beyond additive-based methods (e.g., using mineral acids, or lixiviants), − the reactivity (i.e., aqueous dissolution rate) of a solute can be increased by (a) stirring (i.e., convective mixing) which enhances ion transport (e.g., away from the dissolving surface, into bulk solution) in solution, (b) grinding the solute into increasingly finer particles to increase the interfacial surface area (i.e., at the solute–solvent interface) available for dissolution, and (c) heating the solute–solvent system given the strong dependence of reaction rates on temperature. More recently, acoustic stimulation has been shown to be effective at greatly enhancing the dissolution rates of inorganic minerals (e.g., 11-fold increase in calcite dissolution rate) and glasses − (e.g., near-3-fold increase in obsidian dissolution rate).…”

Section: Introductionmentioning

confidence: 99%

Rapid Elemental Extraction from Ordered and Disordered Solutes by Acoustically-Stimulated Dissolution

et al. 2021

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Alkaline industrial wastes (e.g., slags: ordered crystalline solids, and fly ashes: disordered solids) represent abundant reservoirs of elements such as silicon and calcium. Rapid elemental extractions from these wastes, however, have often relied on the use of “stoichiometric additives” (i.e., acids or bases). Herein, we demonstrate that acoustic stimulation enhances the release of network-forming Si species from crystalline blast furnace slags and amorphous fly ashes at reaction temperatures less than 65 °C. These additive-free enhancements are induced by cavitation processes which reduce the apparent activation energy of solute dissolution (E a, kJ/mol) by up to 40% as compared to unstimulated conditions. Because of the reduction in the apparent activation energy, acoustic stimulation features an energy intensity that is up to 80% lower in promoting dissolution, as compared to other additive-free methods such as enhancing the solute’s surface area, introducing heat, or convectively mixing the solvent. Based on atomic topology analysis, we show that the reduction in apparent dissolution activation energy upon acoustic stimulation scales with the number of weak topological constraints per atom in the atomic network of the dissolving solute, independent of their ordered or disordered nature. This suggests that sonication breaks the weakest constraints in the solute’s atomic network, which, in turn, facilitates dissolution. The results suggest the ability of acoustic stimulation to enhance waste utilization and circularity, by enabling efficient resource extraction from industrial wastes.

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Investigation of atmospheric pressure leaching conditions and leaching kinetics in the obtaining of industrial copper (II) acetate solution from copper slags

Sari,

Turan

2023

J. Cent. South Univ.

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Recovery of copper from the copper slag and copper slag flotation tailings by oxidative leaching

Cited by 11 publications

References 15 publications

Pressure Leaching of Copper Slag Flotation Tailings in Oxygenated Sulfuric Acid Media

Pressure Leaching of Copper Slag Flotation Tailings in Oxygenated Sulfuric Acid Media

Rapid Elemental Extraction from Ordered and Disordered Solutes by Acoustically-Stimulated Dissolution

Investigation of atmospheric pressure leaching conditions and leaching kinetics in the obtaining of industrial copper (II) acetate solution from copper slags

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