Copper sulfides agglomeration using a novel lab-scale
The leaching rate is the ratio of leached copper metal mass to the total copper metal mass. The total leaching period is 14 days. During the leaching period, the Hence, bio heap leaching processes of low-grade copper sulfides as a strong alternative have been developed for the extraction of copper from chalcopyrite by Bioleaching of copper from chalcopyrite ore at higher NaCl
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Minerals Free Full-Text Copper Bioleaching in
This paper reviews the exploration and application of copper bioleaching in China. Two typical bioleaching applications and technological processes, This paper explores (a) the main process of isolation, identification and enrichment of leaching bacteria, (b) the bioleaching mechanism and interface reaction, (c) the Progress of research in copper bioleaching technology in
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(PDF) Copper Bioleaching in China: Review and
Two typical bioleaching applications and technological processes, bioheap leaching at the Zijinshan Copper Mine and bioheap leaching at the Dexing Copper Mine, are introduced.case studies of copper bioleaching at the Zijinshan Copper Mine (ZCM, bioheap leaching) and the Dexing Copper Mine (DCM, biodump leaching) are presented. Copper Bioleaching in China: Review and Prospect
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How copper dump leaching works ScienceDirect
How copper dump leaching works. In copper dump leaching, run-of-mine ore is irrigated with acidic leaching solution to generate aqueous cupric ions for further This paper provides an introduction to the theoretical background regarding the mathematical modelling of the leaching process of copper minerals, Copper Mineral Leaching Mathematical Models—A Review
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Copper Mineral Leaching Mathematical Models A Review
In the present work, a comprehensive analysis of theoretical copper mineral leaching modeling techniques is developed, including industrial application using heap Abstract. JX Nippon Mining and Metals Corporation developed the JX Iodine Process, which is an innovative and patented copper-leaching method for low-grade primary sulfide ores. The process consists of the irrigation of ferric iron and low-concentration iodide solutions. One-meter column leaching tests were conducted on a Chalcopyrite leaching with iodine (JX Iodine Process) for
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Comprehensive recovery of zinc, iron and copper from copper
In this study, a novel method to recover copper, zinc and iron from copper slag by SO 2 –O 2 roasting-leaching-magnetic separation was proposed. The effect of roasting experiment conditions were roasting temperature of 900 °C, holding time of 120 min, and φ SO2 (The volume fraction of SO 2 in the mixed gas of SO 2 and O 2) of This research was aimed to investigate the leaching behavior of zinc and copper from a porcelain stone tailings sample using RSM-CCD modeling. The synergetic and individual effects of five main Leaching of copper and zinc from the tailings
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Selective Ozone-Assisted Acid Leaching of Copper from Copper
The optimal conditions for copper leaching from copper smelter slag in the «isopronalol—sulfuric acid—ozone» system was determined as follows: 0.4 M H 2 SO 4; O 3 flow rate of 0.04 g min −1; pulp density of 10%; 70 °С. Under these conditions, copper extraction was 87%, while only 10% of iron passed to the solution.In this paper, a novel alkaline leaching process using H 2 O 2 as oxidant at atmospheric pressure for the recycling of copper telluride out of anode slime has been proposed. The process flowsheet is shown in Fig. 1.This process consists of two main procedures of atmospheric alkaline leaching and neutralizing precipitation, which An environmental-friendly process for recovery of tellurium and copper
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The bioleaching of sulphide minerals with emphasis on copper
The most successful copper heap leaching operations have been those processing copper oxides and secondary copper sulphides (Table 1).Chalcocite (Cu 2 S) is the main copper sulphide mineral mined at bioleaching operations. Some of the chalcocite heap operations began as oxide (chemical) leach operations and were converted to Heavy metal containing sludge from printed circuit board production (PCB) is not only classified as hazardous waste, but also as a potentially valuable raw material for copper recovery. Since sludge leaching is a significant first step in copper extraction yield via hydrometallurgy, we assessed the optimum copper acid-leaching conditions using a Optimizing acid leaching of copper from the wastewater
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Bioleaching of copper from chalcopyrite ore at higher NaCl
An investigation was carried out by Bevilaqua et al. (2013) for evaluating chalcopyrite leaching with a combination of A. ferrooxidans and the addition of 100 mM NaCl (∼6 g/L). The results showed that in the presence of 3 g/L chloride, chalcopyrite leaching by S. thermosulfidooxidans Cutipay was clearly improved (Bobadilla-Fazzini et alThe main objective of the present work is to study the use of two carbon-based materials in the leaching of zinc and copper from low-grade tailing waste. Furthermore, the effect of different H 2 SO 4 concentrations was studied in order to optimize the leaching conditions. Zinc and copper extracted from mine tailings was determined at Recovery of Zinc and Copper from Mine Tailings by Acid Leaching
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Heap leaching as a key technology for recovery of
Large scale copper heap leaching commenced in Chile from the 1980s, (by bioleaching and chemical leaching; Ilyas et al., 2013). Re-leaching of tailings and residue materials, either to liberate additional value left behind due to incomplete extraction (especially in the context of historic gold tailings) or to extract other values notThe leaching of secondary copper sulfide minerals by microbially generated ferric iron results in the rapid solubilization of ionic copper (Cu 2+) and the formation of a complex series of oxidized copper sulfide intermediate minerals, called blaubleibender covellites, which are generally depicted simply as CuS. The oxidation of Progress in bioleaching: part B: applications of microbial processes by
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Metals Free Full-Text Leaching Chalcopyrite
This article presents a copper leaching process from chalcopyrite concentrates using a low-pressure reactor. The experiments were carried out in a 30 L batch reactor at an oxygen pressure of 1 Leaching of chalcopyrite Leaching of copper from chalcopyrite was first studied with different solvents and oxidizing agents at 60 °C. The following organic solvents were used for chalcopyrite leaching: ethanol (EtOH), Solvometallurgical process for extraction of
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A comprehensive review on the recovery of copper values from copper
A leaching efficiency of about 95% was achieved by leaching the ground copper slag with concentrated sulphuric acid (98% purity) at an optimized digestion temperature of 250 °C for a duration of 2 h. Process., 124 (2013), pp. 145-149, 10.1016/j.minpro.2013.07.009. View PDF View article View in Scopus Google Scholar Heap leaching is a low-cost technology used in industrial mining to recover precious metals such as gold and uranium, along with several other highly sought after metals like copper, from their primary resources (ores and minerals). For many decades, there has been a growing demand for heap leaching due to its environmental benefits. Sustainability Free Full-Text A Brief Note on the Heap Leaching
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Bioleaching of electronic waste using acidophilic sulfur
Bioleaching of copper-rich electronic waste material was carried out using mesophillic Acidithiobacillus thiooxidans.The leaching behaviour of copper was investigated using three methods: abiotic chemical leaching using inorganic sulphuric acid, indirect leaching using bacterially generated sulphuric acid and by direct leaching using the The processing of Cu, Co, and Zn at the Boleo project in Mexico involves two-stage (oxidation–reduction) leaching to extract a total of 85–88% Cu in 4 h. The first stage is an oxidation leaching using sulphuric acid (120 kg/tonne ore) at an Eh of 900 mV for 2 h. Then, the reduction stage takes place in 2 h with SO2 gas sparging for Mn and Co Metals Free Full-Text The Recovery of Cu, Co, Zn, and Mn
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Optimization of sulfuric acid leaching of roasted chalcopyrite
Chalcopyrite (CuFeS2) is commonly used ore in production of copper, but leaching of this ore is very slow and inefficient due to “passivation” during leaching at atmospheric conditions. In this study, in order to overcome drawbacks of the passivation layers, the concentrate supplied from Eti Bakır A.Ş. Küre Plant in Turkey was roasted at Testing Method and Characterization. A Pekin–Elmer optima-5300DV inductively coupled plasma atomic emission spectrometer (ICP-AES) was used to quantitatively determine the content of the chemical elements in the copper smelting slag and the leaching residue, and X 'pert Pro MPD X-ray diffraction (XRD) was used to A Study on the Selective Leaching of Valuable Metals and
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The current state and future directions of percolation leaching
The largest copper heap leaching facility is the Zijinshan copper mine, which is a copper bio-leaching system and it has a daily ore treatment capacity of 20,000 tonnes. 13.9 million tonnes of low grade secondary copper sulphide ores (0.38% Cu) have been treated from 2006 to 2009 and the bio-heap leaching based copper cathode
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