So far, the methods studied for copper leaching from WEEE can be classified as: leaching with strong acids such as HCl (Kim et al., 2011), H 2 SO 4, …This study, which covered a set of leaching processes at a few stages, investigated the inclusion of iron found in mill scale, which is a waste of the iron-steel industry, in the solution as FeCl x=2,3 in the presence of HCl and the conditions of using this solution with an oxidizing character in extraction of metals from chalcopyrite concentrate. . Mill scale was treated with …

metals Article Leaching and Selective Recovery of Cu from Printed Circuit Boards Manivannan Sethurajan 1 and Eric D. van Hullebusch 1,2,* 1 Department of Environmental Engineering and Water Technology, IHE Delft Institute for Water Education, Westvest 7, 2611 AX Delft, The Netherlands; [email protected] 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 leaching kinetics. Applying statistical and …

Gold recovery from electronic waste material with high copper content was investigated at ambient conditions. A chemical preliminary treatment was found necessary to remove the large quantities of copper before the precious metal can be extracted. For this purpose inorganic acids (HCl, HNO 3 …KEYWORDS: E-Waste, Copper, Leaching, Electro Deposition INTRODUCTION Millions of Electronic devices have been installed over the past two decades. As new electronic devices come onto the market, significant numbers of old electronic devices are being scrapped. The number of obsolete electronic devices has also been growing.

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. Optimum leaching …Copper leaching from waste electric cables by biohydrometallurgy Fanny Lamberta,⇑, Stoyan Gaydardzhieva, Grégoire Léonardb, Gregory Lewisc, Pierre-François Bareelc, David Bastina a Laboratory of Mineral Processing and Recycling, University of Liege, Chemin des chevreuils B52, Liege, Belgium bLaboratory of Chemical Engineering, University of Liege, …

Selective copper leaching was achieved with all the acids studied, including HCl, HNO3, and H2SO4. The lower concentration of acid solutions resulted in a larger difference in leachabilities between Cu and Fe. Among three leachates, the H 2SO4 solution performed effectively on the selective leaching of Cu and Fe. Adjusting the pulp density toThis study examines the leaching of copper from waste electric cables by chemical leaching and leaching catalysed by Acidithiobacillus ferrooxidans in terms of leaching kinetics and reagents consumption. Operational parameters such as the nature of the oxidant (Fe 3+, O 2), the initial ferric iron concentration (0–10 g/L) and the temperature (21–50 °C) were identified to …

This study investigated the leaching of coarse-sized copper sulphide ore, with top sizes ranging from 150 to 250 mm. The simulated run-of-mine ore sizes were leached for more than six months.This project deals with the experimental results of the leaching of Cu from Printed Circuit Boards (PCB) from obsolete electronic devices by means of leaching using different combinations of acidic mixtures followed by precipitation. Printed circuit boards were dismantled, cut into small pieces, and fed into a Ball mill. The powder obtained was leached by using the aqueous …

The study was performed using electronic waste with high copper contents. The electronic components were manually separated from each of the printed cards (EW-PCB), leaving only the substrate with traces of welding ().Once selected, a preliminary milling was performed and the EW-PCB was classified by particle size.Electronic waste (e‐waste) contains metallic values that can be recovered by hydrometallurgical methods. This investigation addresses the leaching kinetics of e‐waste for the recovery of copper in H 2 SO 4 ‐H 2 O 2 media with the objective of determining the rate‐controlling step in monosize particle systems. The results are then used to develop a …

Copper Leaching Method Metallurgist Mineral. At the Steptoe mill in Nevada a small leaching annex is treating oxidized copper ore in conjunction with flue dust at a cost of 008 per pound copper recovered The actual cost of copper produced by leaching methods is however not of so much importance as the fact that ore may be handled in this manner which is not amenable to …copper sulfate and concurrently produces 3,035 pounds of cement copper. Incineration Electronic scrap contains significant quantities of plastics and organic liquids which must be eliminated to prepare feed for smelting. Incineration may be accomplished by heating the scrap to 4000 to 5000 C in a gas-fired fur­ nace.

Crushing milling copper leaching. Leaching electronic milling copper 2 milling crushed in a ball mill of the copper slag copper ore to more than 90 of the milled particles pass 160 mesh sieve particle sie 160 mesh to 300 mesh leaching.Get Pricecopper crushing and copper milling process. Crushing Milling Copper Leaching. Read moreIn leaching roasted mill tailings the consumption of acid appears to be small—about 50 lb. acid per ton of tailings handled—even with very fine …

Cooling and milling of slag . ... Chemical process involves leaching of gold/silver from electronic scrap using cyanide. The leachate containing gold/silver complex thus obtained is then subjected ...The rise in the electronics industry has impacted the environment through the large volumes of waste that are improperly disposed of and the growing demand for precious and rare metals from natural sources. Leaching of copper, cobalt, gold, and silver from printed circuit boards of waste cellular phone has been carried out using imidazolium cation-based ionic …

Although copper is the principal metal in most electronic scrap, printed circuit boards in mobile phones also contain a significant amount of silver, gold and palladium. A bench-scale extraction study was carried out on the applicability of economically feasible hydrometallurgical processing routes to recover these precious metals. The starting material contained 27.37% …Copper minerals,b iron and other metallic0.5-6.0 pyrites, byproducts, andgangue Solution of copper and leaching agent20-50 (water orHAO.) Copper, iron (0.2-2.00/0), trace amounts of85-90 silica and aluminum oxides, and oxygen Organic solvent and pregnantIeachate; 25-35 then organiccopper miXtUre plUs H2S04