Effect of Mechanical Activation on the Kinetics of Copper Leaching from Copper Sulfide (CuS)

Lee, Jaeryeong; Kim, Suyun; Kim, Byoungjin; Lee, Jae-chun

doi:10.3390/met8030150

Cited by 22 publications

(15 citation statements)

References 42 publications

(46 reference statements)

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“…The XRD spectra of leaching residue of HCl and ascorbic acid ( Figure S7 ) showed that the leaching residue of HCl still contained LiCoO 2 , Li 2 CoMn 3 O 8 , and Co 3 O 4 , while the leaching residue of ascorbic acid mostly contained carbon of the anode powder, elemental Cu (COD 9011604) from the reduction Cu(II) by ascorbic acid [ 28 , 29 ], and the insoluble product of ascorbic acid hydrolysis, D-isoascorbic acid (PDF 32–1637).…”

Section: Resultsmentioning

confidence: 99%

“…Table S7 shows that the activation energy of Co, Li, and Mn in HCl are higher than in ascorbic acid. In addition, the activation energy of a diffusion-controlled process is usually below 40 kJ/mol, while for a chemically controlled reaction, the value is usually greater than 40 kJ/mol [ 29 , 30 ]. Therefore, both diffusion and chemical reaction processes were involved in the leaching of Co, Li, and Mn from spent LIBs using HCl and ascorbic acid.…”

Section: Resultsmentioning

confidence: 99%

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Subcritical Water Extraction of Valuable Metals from Spent Lithium-Ion Batteries

2020

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The leaching of valuable metals (Co, Li, and Mn) from spent lithium-ion batteries (LIBs) was studied using subcritical water extraction (SWE). Two types of leaching agents, hydrochloric acid (HCl) and ascorbic acid, were used, and the effects of acid concentration and temperature were investigated. Leaching efficiency of metals increased with increasing acid concentration and temperature. Ascorbic acid performed better than HCl, which was attributed to ascorbic acid’s dual functions as an acidic leaching agent and a reducing agent that facilitates leaching reactions, while HCl mainly provides acidity. The chemical analysis of leaching residue by X-ray photoelectron spectroscopy (XPS) revealed that Co(III) oxide could be totally leached out in ascorbic acid but not in HCl. More than 95% of Co, Li, and Mn were leached out from spent LIBs’ cathode powder by SWE using 0.2 M of ascorbic acid within 30 min at 100 °C, initial pressure of 10 bar, and solid-to-liquid ratio of 10 g/L. The application of SWE with a mild concentration of ascorbic acid at 100 °C could be an alternative process for the recovery of valuable metal in spent LIBs. The process has the advantages of rapid reaction rate and energy efficiency that may benefit development of a circular economy.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Subcritical Water Extraction of Valuable Metals from Spent Lithium-Ion Batteries

2020

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“…However, according to values of ∆G θ for Equations (3) and 4, in an oxidative sulfate system, the reaction of Sn with H 2 O 2 is dominant, resulting in intensive oxidation of Sn in highly stable hydrolyzed tin (IV) oxide, H 2 SnO 3, and/or SnO 2 × xH 2 O. In addition, although reaction between metallic Ag and H 2 SO 4 is disfavored according to Equation (5), a reaction may be expected as a result of partial oxidation of Ag, since Ag 2 O may be subsequently dissolved in H 2 SO 4 (refer to Equations (6) and 7).…”

Section: Simulation Of Leaching Reactionsmentioning

confidence: 99%

“…This makes hydrometallurgical recycling of electronic waste economically feasible even at lower operating capacities. From a technological perspective, due to morphological similarity between WPCBs and specific "refractory" copper ores, traditional hydrometallurgical methods are applied for WPCBs recycling as well [5,6]. Thus, in the beginning, hydrometallurgical recycling of WPCBs was focused only on gold and silver recovery, mainly through simplified variations of the cyanidation process.…”

Section: Introductionmentioning

confidence: 99%

Hydrometallurgical Process for Selective Metals Recovery from Waste-Printed Circuit Boards

Kamberović

Ranitović

Korać

et al. 2018

Metals

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This paper presents an experimentally-proved hydrometallurgical process for selective metals recovery from the waste-printed circuit boards (WPCBs) using a combination of conventional and time-saving methods: leaching, cementation, precipitation, reduction and electrowinning. According to the results obtained in the laboratory tests, 92.4% Cu, 98.5% Pb, 96.8% Ag and over 99% Au could be selectively leached and recovered using mineral acids: sulfuric, nitric and aqua regia. Problematic tin recovery was addressed with comprehensive theoretical and experimental work, so 55.4% of Sn could be recovered through the novel physical method, which consists of two-step phase separation. Based on the results, an integral hydrometallurgical route for selective base and precious metals recovery though consecutive steps, (i) Cu, (ii) Sn, (iii) Pb and Ag, and (iv) Au, was developed. The route was tested at scaled-up laboratory level, confirming feasibility of the process and efficiencies of metals recovery. According to the obtained results, the proposed hydrometallurgical route represents an innovative and promising method for selective metals recovery from WPCBs, particularly applicable in small scale hydrometallurgical environments, focused on medium and high grade WPCBs recycling.

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“…Froth flotation produces copper concentrate with some trace elements that are considered impurities, principally arsenic and antimony, and minor elements such as Cd, Hg, Pb, Bi, Se, and Te. The most common mineralogical species associated with toxic impurities present in copper concentrates are enargite (Cu 3 AsS 4 ), arsenopyrite (FeAsS), rejalgar (AsS), tennantite (Cu 12 As 4 S 13 ), tetrahedrite (Cu 12 Sb 14 S 13 ), and famatinite (Cu 3 SbS 4 ) [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Leaching of Oxide Copper Ores by Addition of Weak Acid from Copper Smelters

Araya

Toro

Castillo

et al. 2020

Metals

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In this study, weak acid in the curing and leaching stages of copper ore was incorporated, and we analyzed its effect on the dissolution of copper and final impurities. The weak acid corresponds to a wastewater effluent from sulfuric acid plants produced in the gas treatment of copper smelting processes. This effluent is basically water with high acidity (pH-value low at 1), which contains several toxic elements and some valuable metals. The results indicated that there is no positive or negative effect on the incorporation of the weak acid in the curing stage, while the case of the leaching stage is favored. Toxicity characteristic leaching procedure (TCLP) and synthetic precipitation leaching procedure (SPLP) toxicity tests were performed on the solid leaching residues, determining that they accomplish the stability ranges of the impurities (Pb, Cd, Hg, Cr, Ba, Se, As, and Ag).

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Effect of Mechanical Activation on the Kinetics of Copper Leaching from Copper Sulfide (CuS)

Cited by 22 publications

References 42 publications

Subcritical Water Extraction of Valuable Metals from Spent Lithium-Ion Batteries

Subcritical Water Extraction of Valuable Metals from Spent Lithium-Ion Batteries

Hydrometallurgical Process for Selective Metals Recovery from Waste-Printed Circuit Boards

Leaching of Oxide Copper Ores by Addition of Weak Acid from Copper Smelters

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