ABSTRACT: A strategy for the efficient recovery of highly pure copper and antimony metals from electronic waste (e-waste) was implemented by the combination of hydrometallurgical and electro-chemical processes. The focus is on copper recovery as the main component in the leached solution, whereas the antimony recovery
The effect of ammonium salts on copper recovery from an industrially provided ICT waste was investigated by using an ammonia-based leaching solution. …
The focus is on copper recovery as the main component in the leached solution, whereas the antimony recovery process was established as a purification step …
In this work, a facile ultrasonic-assisted chemical replacement method was developed for the recovery of copper and tin from tinned copper wire waste. The reaction conditions for the process were optimized (e.g. hydrochloric acid concentration, copper sulfate concentration, ultrasonic frequency, ultrasonic power, reaction time). The …
LIX 64N solution comes into contact first of all with the aqueous solution most depleted in copper and therefore having a higher ferric iron/copper ratio and lower pH than at any other part of the …
Copper is an important metal widely used in electrical, light industry, machinery, construction, national defense and other fields because of its excellent ductility, conductivity and thermal conductivity (Gbor et al., 2000; Guo et al., 2018b; Potysz et al., 2015).Iron ore is the supporting resource of China's iron and steel industry, which is a …
A clear, concentrated copper solution with reduced iron levels could be generated by this process for EW. The proposed approach in this study presents an alternative treatment process for purification and concentration of bioleach solutions prior to recovery of copper by electrowinning.
In this review, the use of liquid membrane technology in treating/recovering copper and silver from industrial e-waste leached solutions was highlighted. It also …
A simple intermediate purification step, which allows the recovery of antimony, through variation of pH, was presented. The electrochemical …
The focus is on copper recovery as the main component in the leached solution, whereas the antimony recovery process was established as a purification step in order to achieve a highly pure copper deposit. ... at potentials between −0.25 and −0.5 V versus SCE. In addition, the synthetic copper solution, red line, presents two oxidation ...
keeping the copper level of regenerated pickling solution below 100 ppm using electrodeposition method. As mentioned previously, there are studies for either copper removal from pickling solutions or electrolytic recovery of copper from acidic solutions. However, to the best of our knowledge,
the highest ratio of Cu:water recovery occurred at pH = 12. In the next series of experiments, at pH 6, 9, and 12, all conditions were held fixed, but MIBC was replaced with ethanol as the frother (Fig. 2). Figure 2 shows again that pH = 12 had the maximum copper recovery (71 %) and the maximum ratio of copper ion: water recovery.
Copper recovery from spent ammoniacal etching solutions . evolution of H. 2 . gas, according Eq. (2), is the main side reaction at the cathode, which more or less
The recovery of copper from waste copper slags has been studied with various amounts of carbon and alkalinity at different reduction temperatures and time. By optimizing the smelting parameters, the degree of copper recovery can be increased to more than 85% [26]. However, in pyrometallurgical dilution, to keep the copper slags in …
The power pre-fusing requirement is 125 amps, three phase 480V circuit. (400V 50Hz outside USA availabe). The mini-plant is shipped in one 40 ft. container, with only 4 hour on-site assembly required.
Alkaline Etching Solution & Copper Recycling Equipment (Extraction Electrolysis Process) Features. The waste etching solution is regenerated, and the regenerated …
Recovery of valuable metals via leaching printed circuit boards (PCBs) has gained moment recently. This work studied the Microbial fuel cell (MFC) performances for recovery of Cu from a Cu2+ solution by examining key operating parameters. A dual-chamber MFC with 6 cm × 6 cm × 7 cm dimensions was constructed. Both anode and …
copper recovery from the depleted acid solutions by the cementation and precipitation method was verified. In the In the process of cementation, iron in the f orm of metal lic swarf was used as a ...
Extraction experiments were carried out using an aqueous solution containing 2 g/L Cu at Gly:Cu molar ratio of 3:1 and pH 11.The different phases were allowed to attain the set temperature (15–55 °C) and then contacted at an A:O 1:1 for 15 min at the set temperatures.Results in Table 2 show that within the studied temperature …
There exist three key treatment processes to recover copper from cables: the first uses manual or mechanical processes to strip cables and wiring to recover copper; the …
The study of copper (Cu) recovery is crucial for the entire recovery process of waste printed circuit boards (WPCBs), and Cu can be leached efficiently via a sulfuric acid–hydrogen peroxide (H2SO4–H2O2) system. To achieve high Cu recovery, it is important to evaluate the parameters of the leaching process and understand the Cu …
Thus, considering the concentration of 12.16 g/L of copper present in Figure 4, at the zero electro-obtaining time, after 750 min of electro-obtaining, the concentration of 2.69 g/L of copper in solution was reached and a recovery of 78% of the copper contained in the solution in the form of solid deposit was obtained.
The electrolytic removal of oxidants – copper electrodeposition process is used to treat micro-etching waste liquid. The electrolytic removal of oxidants process is to use equipment to reduce the oxidants such as sodium persulfate, ammonium persulfate and …
An electrolytic method for the recovery of pure copper from sulphate solutions is far preferable and will produce cheap copper. In all cases a low current density is required. Hard-lead anodes or composite anodes of hard lead and coke of uniform thickness will be used.
ABSTRACT: A strategy for the efficient recovery of highly pure copper and antimony metals from electronic waste (e-waste) was implemented by the combination of …
The results reflected a good Copper recovery rate with concentrations up to 1.9 g/L. The best results were obtained for the 0.20 molar Sulphuric Acid solutions, producing a stability in the Copper ...
Recovery of Copper by Solution Mining Methods 1 Recovery of Copper by Solution Mining Methods David F. Briggs, Economic Geologist 3514 West Blacksill Drive Tucson, Arizona 85741 Phone - 520-744-4195 Cell - 520-784-3954 Introduction Solution mining is a mining practice that employs solutions (i.e. water or dilute acid) to recover a desired …
This study presents an optimized leaching and electrowinning process for the recovery of copper from waste printed circuit boards including studies of chemical consumption and recirculation of leachate. Optimization of leaching was performed using response surface methodology in diluted sulfuric acid and hydrogen peroxide media. …
DOI: 10.1016/J.HYDROMET.2007.05.010 Corpus ID: 96177465; Recovery of high purity copper cathode from printed circuit boards using ammoniacal sulfate or chloride solutions @article{Oishi2007RecoveryOH, title={Recovery of high purity copper cathode from printed circuit boards using ammoniacal sulfate or chloride solutions}, author={Tetsuo …
Lei et al. studied the displacement method by copper sulfate to recycle tinned copper. Cu 2+ in the solution was displaced by tin, while the copper and the stripping tin solution were obtained. Especially, many studies focused on the recovery of copper and tin from the stripping tin solution, because of the displacement method …
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نشانی: شماره 1688، جاده شرقی گاوک، منطقه جدید پودونگ، شانگهای، چین.
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