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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An alternative method to recover copper and selenium from anode slime was designed. • The critical process parameters were investigated and optimized. • 2 L/min flow rate of oxygen was enough to achieve the maximum dissolution rates. • The maximum recovery of copper and selenium was found as 94% and 86%, respectively. •
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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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During electrorefining, copper is purified from impure anodes by dissolving the anodes in an electrolyte and plating on the cathodes. All insoluble components are …
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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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In the electrolytic refining process, the anodes and cathodes are, individually, the copper anodes produced in pyro-refining and 316 L stainless steel sheet or copper starting sheet, and the electrolyte (58–62 °C) is an aqueous solution of sulfuric acid (150–200 g/L) and copper sulfate (copper content 40–50 g/L).
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At present, anode slimes from electrolytic copper refineries are the primary source of tellurium, which is the main source of the world tellurium supply. Copper anode slimes usually consists of copper, selenium, nickel, tellurium, silver, gold, and trace amount of platinum group metals, with the Te content typically being about 1–4 wt%, and ...
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An inert anode is used to complete the circuit and the necessary counter reaction to metal recovery. Metal is recovered at the cathode. Ions or molecules are …
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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., 1995; Petkova, 1997).
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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. ... Navarro L. Electrolytic recovery of bismuth and copper as a powder from acidic sulfate effluents using an emew cell. RSC Adv. 2015, 5, …
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1. Introduction. Copper anode slime is the byproduct of electro-refining of copper, which often contains precious metals and is a valuable secondary resource for recovering valuable products, such as silver, from it (Ding et al., 2017, Wang et al., 2017, Yldrm et al., 2014).The predominant method for silver recovery from anode slime is …
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then to liquid copper metal upon conversion. After fire refining, copper is cast to anodes and aqueous electrorefining is used to recover these valuable elements. While largely …
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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 ... 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 environmentally
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Electrolytic refining is a process of refining a metal (mainly copper) by the process of electrolysis. As far as the mechanism of the process is concerned, during electrolysis, a large chunk or slab of impure metal is used as the anode, with a thin strip of pure metal as the cathode. In this setup, an electrolyte (metal salt aqueous solution ...
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In copper electrolysis, when a current is applied, positively-charged copper ions (called cations) leave the anode (positive electrode) and move toward the cathode (negative …
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While in 3D stainless steel turning cathode reactor, 99.5% of copper can efficiently be recovered from dilute solution with an acceptable current efficiency of about 56.8% with minimum energy consumption of 2.37 kWh/kg of Cu. The experimental results suggested that the efficiency of copper removal is hindered by the presence of organic …
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Copper anode slimes, produced from copper electrolytic refining, are important industrial by-products containing several valuable metals, particularly silver and gold. This article provides a …
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Deep eutectic solvents (DESs) have emerged as environmentally friendly electrolytes for the separation and recycling of metals and their compounds. This study …
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Electrowinning is the electrolytic process of "winning" or recovering dissolved metal using an applied potential. An example of an electrowon copper plate is shown in Fig. 7.1. This process is practiced extensively in the metals industry. Copper, zinc, and gold, as well as other metals are produced by this process.
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Chu et al. (2015) reported that copper powders with a purity of 98.06% can be directly recycled from WPCBs metal concentrated scraps by electrolysis using pressed tiles of WPCBs powders as the anode. Sun et al. (2016) showed that copper could also be selectively recovered by electrochemical method with different ammonium salt solutions, …
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Subsequently, under the electrolytic conditions of the concentration of CuSO 4 of 60 g/L, the concentration of H 2 SO 4 of 122.5 g/L, and the current density of 40 mA/cm 2, the electrolysis duration of 1440 min, the purity of the copper obtained from copper granules with the acid pretreatment is 99.73%, which is much higher than that obtained ...
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The aluminum electrolysis industry continually and unavoidably produces hazardous solid waste in the form of carbon anode slag. Carbon anode slag poses a serious environmental pollution risk, and it must be disposed of in a harmless manner. On the other hand, it contains a few valuable resources, as well. In order for the aluminum …
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Electrolytic extraction showed that the mean weight of copper deposited at 1 Mol acid extraction (683.3 ± 2.6 mg) was significantly higher than that deposited at 3 mol concentration of ...
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Copper anode slimes are a byproduct of electrolytic copper refineries which usually contains many valuable elements such as Au, Ag, PGMs (platinum-group metals), Cu, Se, Pb, As and Sb.
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Abstract. Copper anode slimes, produced from copper electrolytic refining, are important industrial by-products containing several valuable metals, particularly silver and gold. This article provides a …
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anode handling machines, electrolytic cells, busbars, and electrodes. Our electrolyte circulation and filtration process is ... • Proven technology used by copper refineries around the ... Anode scrap washing machine • Excellent slime recovery • Fully automated and safe operation • Closed washing water circulation and clean, slime-free ...
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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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Anode slime is the byproduct generated during the electrorefining of impure copper anode produced in the pyrometallurgical extraction of copper. Copper anode slime generated at the bottom of the electrolytic cell contains many valuable metals, including precious metals and some rare elements. Though the elements present in the anode slime are ...
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There are numerous viable approaches to the treatment of anode slimes from electrolytic copper refining. Of particular interest in the treatment of slimes are the behavior and recovery of selenium. The understanding of the process chemistry involved in the treatment of anode slimes should be aided considerably by recent work on the formation and …
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Electrolytic copper foil stands as a pivotal material in the electronics industry. Anode materials are extensively utilized in the processing of electrolytic copper foils. Given the intricate production conditions of copper foils, there are multifarious factors contributing to the failure of titanium anodes. Presently, there is comprehensive research …
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Under the optimal parameters: the pH of 13.0 and ionic strength of 0.25 in anode compartment, electrode distance of 3.0 cm, cell voltage of 2.4 V, and temperature of 50 °C, copper recovery efficiency of 99% and energy consumption of 1.58 W h/g Cu …
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It is owing to the anode material and electrical conductivity. The recovery rates of copper are all about 100 %, but the recovery rate of tin increases from 60.12 % to 80.62 % by graphite anode used. In the process of electrodepositing tin, 316 stainless steel anode is dissolved seriously, and the rate of weight loss reaches 8.14 %.
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This paper presents a review of chemical composition data of the main stages of copper production from sulfide minerals, such as (1) copper minerals, (2) flotation tailings, (3) flotation ...
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Electrolytic Refining. The purification uses an electrolyte of copper(II) sulfate solution, impure copper anodes, and strips of high purity copper for the cathodes. …
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The attempt at electrolytic recovery of zinc from the zinc ash-domestic sewage mixture using copper electrodes failed to yield metallic zinc after 1.5h of electrolysis time but reduced the total pollution load of the …
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The products of the process are: Molten blister copper (99% Cu, 0.02% S and 0.6% O), which is sent forward to fire refining for final S and O removal, then anode casting: molten Fe-silicate slag (4–8% Cu), which is sent to Cu recovery, then discard; SO 2-bearing offgas, which is treated for heat, dust, and SO 2 capture. All of the heat for ...
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@article{osti_6245074, title = {Electrolytic recovery of copper and regeneration of nitric acid from a copper strip solution}, author = {Stewart, T L and Hartley, J N}, abstractNote = {The fabrication of nuclear fuels involves stripping of a copper jacket with nitric acid. The waste acid, which contains 3.0 to 4.5 N nitric acid and 100 to 180 g/L copper, is currently …
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The optimum conditions for producing Te at a recovery of 90% are found to be roasting of anode slime at 450 °C without the addition of soda ash followed by leaching in 1 M NaOH at 10% pulp ...
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