Eco-friendly and efficient extraction of valuable elements from copper …
1. Introduction. Copper anode mud is an important industrial by-product generated at the bottom of an electro-refining tank during copper electrolytic refining, which makes up 0.2%−0.8% of anode copper (Hait et al., 2002).It is regarded as a hazardous solid waste because of the enrichment of toxic and harmful components.
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Recovery of copper and water from copper-electroplating wastewater …
The anode plates made from titanium grid covered with iridium and ruthenium oxides, and the cathode plates made from AISI 304 stainless steel. ... The HCW was firstly fed into Tank-1, and then pumped into electrolytic cell of EL for copper recovery, the effluent water from electrolytic cell was sent to Tank-2 for further …
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An environmental-friendly process for recovery of tellurium and copper
At present, anode slimes from electrolytic copper refineries are the primary source of tellurium, which is the main source of the world tellurium supply. ... Therefore, tellurium in the solution must be separated from copper before entering the electrowinning circuit for copper recovery because contamination of electrolytic copper by tellurium ...
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Recovery of scattered and precious metals from copper anode …
Section snippets Composition and characteristics of primary metals in CAS. CAS, a by-product of the electrolytic refining of Cu (including primary copper and regenerated copper), is a mixture of various substances that are poorly soluble in the electrolyte during the electrolytic refining of copper anodes (Fahidy, 2006; Gu et al., …
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Separation and recovery of copper in Cu−As-bearing copper
Although smelting, converting and refining greatly reduce the content of impurities, a small quantity of impurities still remain in the copper anodes. During the electrolytic refining of copper, the impurity elements such as As, Sb and Bi gradually dissolve and concentrate in the electrolyte [3âˆ'5].
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Cyanide Destruction and Simultaneous Recovery of Copper …
This work presents the results of a study on the simultaneous destruction of cyanide and recovery of copper from alkaline aqueous solutions in a continuous flow electrochemical reactor that consists of a reticulated vitreous carbon anode and two graphite cathodes. The experiments were carried out using different electrolytes (e.g., …
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Electrolysis of Copper sulfate (CuSO4) Solution
1.27 g of Copper should be plated on a Iron spoon by using a Copper bar as an anode. If electrolysis process should be completed within 10 minutes, Calculate the current. Step 1: Calculate amount of copper plating on the Iron spoon. Amount of copper plating = 1.27 g / 63.5 g mol-1; Amount of copper plating = 0.02 mol
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The Extraction of Copper
Electrolytic Refining. The purification uses an electrolyte of copper(II) sulfate solution, impure copper anodes, and strips of high purity copper for the …
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Selenium minerals and the recovery of selenium from copper …
The recovery of selenium from copper anode slimes. The largest source of selenium is the anode slimes formed during the electrolytic refining of copper (Elkin and Margrave, 1982). Production usually begins by oxidation to produce selenium dioxide at an appropriate temperature. The selenium dioxide is then dissolved in water and the solution is ...
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Selective Volatilization and Recovery of Valuable Metals by …
Copper anode slime produced by electrorefining copper has a high recovery value due to the valuable metals and platinum group metals present. Neither traditional cupellation processes nor hydrometallurgical leaching processes can solve the problem of arsenic enrichment in the system. According to thermodynamic analysis, …
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Collective Recovery of Copper and Silver from Secondary …
The byproduct of the electrolytic refining of copper is anode sludge, which contains a concentration of precious and rare metals. The metal components in the …
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A New Electrolytic Method for On-Site Regeneration of …
recently Zeng et al [7] studied the performance of Ir–Ta oxide-coated anode in oxidizing copper (I) ions from spent acidic copper (II) chloride etchant. The oxidation of copper (I) ions was satisfactory at the currents below 1 A·dm-2and cell voltage difference 3.2 V. But the aspect of copper recovery was not touched in their study.
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The Chemistry of Copper Electrolysis
Electrolysis uses an electrical current to move ions in an electrolyte solution between two electrodes. In copper electrolysis, when a current is applied, positively-charged copper …
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Electrolytic Refining: Silver
The sludge of cement-copper from this tank is washed and drained in wooden tubs with filter bottoms, whence it is transferred to other filter-tubs and allowed to air-dry, and then is melted down and cast into anodes for refining. The copper anodes contain lead derived from the silver-bullion, metals of the platinum, group derived from …
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Electrolytic recovery of copper and regeneration of nitric …
Laboratory-scale electrowinning tests have been conducted in an air-sparged cell at current densities from 0.027 to 0.22 A/cm/sup 2/. The efficiency of copper recovery was improved by adding sulfamic acid or by cooling the electrolyte. Copper current efficiency ranged from 55% to 95%; energy consumption ranged from 1.8 to 6.6 kWh/kg Cu.
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Processing of copper electrorefining anode slime: a review
Anode slime is the insoluble product deposited at the bottom of the electrorefining tank during electrorefining of copper. It generally contains Cu, Ni, Se, Te, Ag, Au, platinum group metals (PGM), Pb, Ba, Fe, etc. Owing to the presence of valuable metals and metalloids in the anode slime, numerous approaches have been made by …
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17.5: Refining of Copper
Figure (PageIndex{1}): The electrolytic purification of copper. In such a cell a thin sheet of high-purity Cu serves as the cathode, and the anode is the impure Cu which is to be refined. The electrolyte is a solution of copper(II) sulfate. Some of the impurities are metals such as Fe and Zn which are more easily oxidized than Cu.
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An Innovative Hydrometallurgical Process for Recovery …
Process for Recovery of Critical and Rare Metals from Copper Anode Slimes Shijie Wang Abstract During electrorefining, copper is purified from impure anodes by dissolving the anodes in an electrolyte and plating on the cathodes. All insoluble components are precipitated to the bottom of electrolytic cells in the tankhouse or cellhouse.
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MIT Open Access Articles Electrolytic production of …
A vision is proposed in which an electrolytic technique, integrated with low cost and sustainable power, enables the production of unprecedented annual tonnages of copper …
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Electrolytic recovery of zinc from zinc ash using a catalytic anode …
The recovery of zinc metal from zinc ash, with a zinc content of about 76% by leaching and electrowinning has been studied. The presence of chloride has been identified as the major problem area. A catalytic anode based on iridium dioxide (IrO 2) was used as the anode material to overcome this problem. Catalyst loading was kept at an ...
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Recovery of scattered and precious metals from copper anode …
Copper anode slime (CAS) is an important component of secondary resources, and it contains a large amount of SPMs. ... is a mixture of various substances that are poorly soluble in the electrolyte during the electrolytic refining of copper anodes (Fahidy, 2006 ... Process development for recovery of copper and precious metals …
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Copper
To purify copper electrolytically, the impure copper metal is made the anode (the positive electrode) in an electrolytic cell. A thin sheet of previously purified copper is used as the cathode (the negative electrode). The electrolyte (the current-carrying liquid in between the electrodes) is a solution of copper sulfate and sulfuric acid.When current is passed …
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Copper and Antimony Recovery from Electronic Waste by
An electrolytic grade copper cylinder of 3.8 cm diameter and 10 cm length was the cathode, whereas a graphite hollow cylinder with an inner diameter of 8 and 10 cm length was the anode. The geometrical areas of the cathode and anode exposed to the electrolyte were 120 and 251 cm 2, respectively.
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Eco-friendly and efficient extraction of valuable elements …
In this study, an integrated pyro-hydrometallurgical process has been developed to recover gold, silver, selenium, copper and lead from a copper anode …
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Direct Electrolytic Refining of End-of-Life Industrial …
The copper plate rejects used for anode were 99.99% pure. 2.2. Experimental Procedure A weighed amount of compressed wire scrap was taken in a fabricated 60 mesh size stainless steel (SS) 316 basket. Then the basket was allowed to hang from the copper contact-rod, acting as anode with the help of a copper wire. The electrolytic solution of ...
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Application of cationic membrane electrolysis on the recovery of copper …
A schematic diagram of the electrochemical reactor is presented in Fig. 1, and this electrochemical cell was designed and made in house.The anode is a titanium plate (30 mm × 50 mm × 1 mm) covered with Ru 2 O, while a metal copper plate with the same size with anode is selected as cathode. Two acrylic frames are used as anode …
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Metallurgical Process for Total Recovery of All Constituent Metals …
Abstract Copper anode slimes, the by-product of the copper electrorefining process, have been the subject of extensive investigation for recovering precious metals viz., Au, Ag, Pt and Pd, in addition to being the main source of rare/energy-critical elements such as Se and Te. There have been various approaches aiming at the development of …
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Copper Electrorefining Technology
Copper Electrorefining Technology Outotec is the leading provider of copper refining ... anode handling machines, electrolytic cells, busbars, and electrodes. Our electrolyte circulation and filtration process is ... • Excellent slime recovery • Fully automated and safe operation
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One-step separation and recovery of copper and sulfur by …
The crystalline structure of the anode product is identified as S 12 and S 6. When Cu 2 S is introduced into Reline, it dissolves ... Due to copper's sulfur-affinity characteristics, achieving one-step separation and recovery of copper and sulfur has always posed a challenge in copper metallurgy. Deep eutectic solvents (DESs) have emerged as ...
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Effects of Acid Pretreatment on Purity of Copper Foil …
The electrolysis refinery of copper is not an unknown process, in which an anode of will-be-refined copper is prepared and the cupric ions oxidized from the copper electrode move from the anode to the cathode where they couple with electrons and are reduced to metal copper again [17, 18]. Great effort has been paid for the integrity and ...
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