The leaching behaviour of electrostatic precipitator dust from the Mufulira Cu smelter (Copperbelt, Zambia) was studied using a 48-h pH-static leaching experiment (CEN/TS 14997). The release of metals (Cd, Co, Cu, Ni, Pb and Zn) and changes in mineralogical composition using X-ray diffraction and PHREEQC-2 modelling were …
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Recovery of Copper from Flue Dust Generated in e-Waste Processing Using Physicochemical Methods Introduction. The demand of electronic equipment …
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Flue dust from secondary copper smelting (FDSC) is a hazardous waste as well as a secondary resource due to the high content of Cl, Br, and valuable metals (Pb, …
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Particle size of matte A as received varied from chunks as large as 1 inch in diameter to dust that passed through a 100-mesh screen. The larger pieces were soft and friable and could easily be reduced to minus 80 mesh. ... Chemical analyses of the individual solutions and the combined solutions showed a copper recovery of 89.08 percent. This ...
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However, metal recovery from this flue dust has not been extensively studied. The flue dust can contain valuable metals such as gold, silver, copper, and iron. In this study, the flue dust from e-waste was investigated as the potential metal resource for obtaining valuable metals, including copper and iron, using physical and chemical ...
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In this research, an integrated hydrometallurgical process for comprehensive recovery of valued metals and safe disposal of arsenic from copper smelting open-circuit (CSO) dust was developed. By sulfuric acid leaching, Cu, As, Zn and Cd can be selectively extracted into leachate while Pb and Bi were remained in the residue. Then, iron powder …
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The separation of Cu, Pb, Zn, and As from copper smelting dust through oxidative alkali leaching and sulfide precipitation, as well as the subsequent recovery of …
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Instead of conventional two or three-stage zinc dust cementation purification, one-stage purification was proposed to remove copper, cadmium and nickel as well as cobalt by Cu Sb activation simultaneously from solution for an electrolytic zinc production process under development by MMG Limited. Copper was rapidly removed, forming a …
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Metals recovery from dust derived from WPCBs recycling line was carried out by vibrated gas-solid fluidized bed in this study. The mineralogical analysis showed that the metal content in WPCBs dust with a size fraction of −0.5 mm is up to 18.865 wt.%, which demonstrated that the dust had high recycling value.
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The Copper Cable Recycling Technology separates the clean copper from contaminated insulation and dust materials in these cables. The recovered copper can then be reclaimed and, more importantly, landfill disposal volumes can be reduced. The existing baseline technology for disposing radioactively contaminated cables is to package the …
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A two-step process with Cu and Au recovery efficiencies of 98% and 44%, respectively was reported in which copper leaching is accomplished with the chemolithotrops Acidithiobacillus ferrovorans and Acidithiobacillus thiooxidans followed by gold leaching using the cyanide-producing Pseudomonas putida under very mild operating conditions …
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Continuous copper recovery from a smelter's dust in stirred tank reactors. Int. J. Miner. ... (2021) used waste acid as a leaching reagent to separate arsenic and valuable metals from copper smelting dust, and then multi-step precipitations were applied for further recovery, accompanied by the recovery efficiency of 99.0 % copper, 86.8 % …
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PMID: 30192727 DOI: 10.1080/09593330.2018.1521473 Abstract Copper smelter flue dust is a residue, rich in zinc, originating from the pyrometallurgical process of copper, and …
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The copper cementation course in copper sulphate waste solution III (57.5 g/l of Cu and pH 0.29) performed rn the trials l-10, and in copper waste solution IV (43 g/1 of Cu and pH 1.45) performed ...
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Copper smelter flue dust is a residue, rich in zinc, originating from the pyrometallurgical process of copper, and constitutes a potential raw material for zinc production. In order to valorise this waste by hydrometallurgical processes, its leaching with sulphuric acid at constant pH is studied. Experimental conditions (temperature, pH, and ...
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The efficient removal and recovery of arsenic from copper smelting flue dust have received widespread attention due to its extremely high toxicity and carcinogenicity. In this research, a roasting method used for treating the dust at a relatively low temperature (300–400 ℃), with adding sulfuric acid and bitumite, was proposed, in which the ...
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Copper smelter dust is an ultrafine hazardous waste containing various heavy metallic elements. This manuscript proposed a novel method for efficient recovery of crown zinc and metallic copper from copper smelter dust, including evaporation and condensation of zinc vapor, and super-gravity separation of copper droplets.
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recovery of copper oxide from wastewater treatment sludge, (4) recovery of copper from basic etching solution, (5) recovery of copper hydroxide from ... drill dust, drill pad, cover clad, waste board, and tin/lead dross. Liquid wastes include high concentration inorganic/organic spent solutions, low concentration
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The highest recovery efficiency of over 99% was obtained after 8 h in 1 M nitric acid and was optimized at a pulp density of 20 g/L and a stirring speed of 200 rpm at 20 C …
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XRD pattern of copper smelting dust. In the reaction, Me refers metals such as lead, zinc, copper and so on. The diffraction peak intensities of arsenic, zinc, lead and tin compounds were very strong, indicating they were present at high contents. ... Continuous copper recovery from a smelter's dust in stirred tank reactors. Int. J. Miner ...
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Based on this school of thought, this chapter discussed, among other things, the resource recovery and recycling from waste copper dust (WCD). One thing that was noticed is that SA WCD has a different chemical composition (CC) than WCD from other regions of the world. Due to the extremely low concentrations of hazardous compounds …
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This manuscript proposed a novel method for efficient recovery of crown zinc and metallic copper from copper smelter dust, including evaporation and …
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A selective acid leaching process was then used to recover the copper content of the residue after filtration. In the second stage, an additional 1 N of sulphuric acid was added to the suspension in the selective leaching process, and the pH value was controlled at 1.5-2.0. The reagent sodium hydroxide (2 N) was used as leachate at a pH greater ...
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Copper Blow Copper Blow Hot Standby Hot Standby Figure 2 - Converter Off-Gas Temperature and Heat Content at Hot ESP Outlet 30,000 Nm3/hr Blowing Rate Converter off-gas at a 30,000 Nm3/hr blowing rate contains approximately 8 to 12 MW of sensible heat at the ESP outlet per blowing converter, and is relatively clean of dust.
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Flash furnace electrostatic precipitator dust (FF-ESP dust) is a recycle stream in some primary copper production facilities. This dust contains high amounts of copper. In some cases, the FF-ESP dust contains elevated levels of bismuth and arsenic, both of which cause problems during the electrorefining stages of copper production. …
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Recovery of metal values from copper smelter flue dust. Hydrometallurgy, 12: 217--224. A hydrometallurgical process has been developed for the recovery of …
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Crude zinc oxide (C.Z.O.) is one of the important resource of zinc metal extraction. The main source of crude zinc oxide includes: a. zinc dust collected from EAF (electrical arc furnace); b. fume dust collected from zinc leaching residue treatment by waelz kiln; c. zinc fume dust collected from lead slag treatment by fuming furnace; d. zinc skim from steel …
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The present work reports the application oriented systematic basic studies for the recovery of copper, nickel and iron from scrap printed circuit boards (PCBs) of computer. Initially, the PCBs were depopulated and crushed with the help of scutter-crusher and then subjected to pyrolysis under vacuum at 300 °C for 4 min. Thereafter, this ...
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EAF dust leaching, Waelz slag treatment, metal recovery from various metallurgical slags, bottom ash treatment, e-waste recycling, etc., can be used for secondary Zn metals recovery.
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The volume of CSO dust in typical copper smelting-converting operations has amounted to about 800,000 tons a year. This dust is an important source of valued metals, such as Cu, Zn, ... Continuous copper recovery from a smelter's dust in stirred tank reactors. Int. J. Miner. Proc., 86 (2008), pp. 50-57. View PDF View article View in Scopus ...
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Flue dust waste coming from a copper (Cu) smelting company has been valorized using a newly developed metallurgical process with the aim of recovering a dust concentrated in valuable metals, such ...
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The concentration of copper ion decreased rapidly from 14.2 to 0.3 g/L after 20 h of deposition time and 98% of copper was recovered at the cathode. Since the reduction potentials of iron, lead and tin ions are lower than that of hydrogen ion, electrodeposition of these metal ions is difficult to occur from the thermodynamic point of view.
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Copper sulphides (CS) in most waste copper dust (WCD) are often small but appreciable, contributing to poor copper recovery (CR) during sulphuric acid leaching (SAL). Oxidative roasting (OR) has often been employed to modify mineralogy of WCD for enhanced recovery.
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Flue dust waste coming from a copper (Cu) smelting company has been valorized using a newly developed metallurgical process with the aim of recovering a dust concentrated in valuable metals, such ...
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A nitrate leachate containing Cu(II), Ag(I), Ni(II), Mg(II), and Al(III) was obtained during the leaching of industrial dust, which arises during the pyrometallurgy of spent camera modules. To separate and recover Cu(II) and Ag(I) from the leaching solution, solvent extraction experiments using 5,8-diethyl-7-hydroxydodecan-6-oxime (LIX63) …
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Recovery of valuable metals from copper smelting open-circuit dust and its arsenic safe disposal 1. Introduction. During the process of copper smelting, …
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