Sulfide ores such as chalcopyrite ((CuFeS_2)) are converted to copper by a different method from silicate, carbonate or sulfate ores. Chalcopyrite (also known as copper pyrites) and similar sulfide ores are the commonest ores of copper.

The percentage extraction of copper was determined using the following equation: (5) ε Cu 2 + = C 1 V C 2 m × 100 % where C 1 represents the Cu 2+ concentration in the leaching solution (g/L), V stands for the volume of the leaching solution (L), C 2 signifies the copper grade in the chalcopyrite concentrate (wt%), and m is the mass of ...

1. Introduction1.1. Background to chalcopyrite leaching. The objective of this research was to evaluate a proposed conceptual flowsheet for the leaching of chalcopyrite using aqueous glycine in an alkaline environment with a suitable oxidant, and to identify potentially feasible routes for copper recovery from such a pregnant leach solution with …

Copper extraction from chalcopyrite in [EMIm]HSO 4-K 2 Cr 2 O 7 leaching system is closely related to the temperature, the particle size of chalcopyrite, as well as concentrations of ionic liquids and K 2 Cr 2 O. CRediT authorship contribution statement.

The present work focuses on the extraction of Cu, suitable for production, directly from a leach solution of a chalcopyrite concentrate as an alternative to the conventional smelting and refining ...

Extracting copper from chalcopyrite involves complex metallurgical processes. Occurrence: Chalcopyrite can be found in various geological settings, …

A gaseous chlorination process for the hydrometallurgical treatment of a chalcopyrite concentrate was investigated. The overall process is visualized to consist of low-temperature chlorination-selective oxidation, followed by aqueous chloride leaching and SX-EW for producing electrolytic copper, elemental sulfur and ferric oxide. In this …

Chalcopyrite is essentially unleached under the mild oxidizing conditions of heap leaching (very slow leach kinetics). It can, however, be leached under oxidizing conditions at elevated temperatures or by microbial leaching under low-potential conditions (Gericke, Govender, & Pinches, 2010).This has led to extensive study into leaching of …

Here, we investigate electrolytic alternatives, reviewing the background and recent developments for four classes of electrolytes to directly decompose the most …

Another approach is to simply accept the slow copper extraction rates and use chalcopyrite primarily for energy storage. Deen and Asselin [29] demonstrate a fixed bed flow cell, where the Fe 2+ /Fe 3+ redox reaction in the presence of Cu is the charge/discharge process. Coulombic efficiency decreased by ∼20% (from 80% initially) …

1. Introduction. Chalcopyrite (CuFeS 2) is economically the most important Cu-sulfide mineral in the world, and unlike many other sulfide minerals, it is known to be recalcitrant in hydrometallurgical processing (Bobadilla-Fazzini et al., 2014, Zhang et al., 2014).In recent years, due to depleting high-grade copper resources, the processing of …

DOI: 10.1039/c9gc02983d Corpus ID: 210154020; Solvometallurgical process for extraction of copper from chalcopyrite and other sulfidic ore minerals @article{Li2020SolvometallurgicalPF, title={Solvometallurgical process for extraction of copper from chalcopyrite and other sulfidic ore minerals}, author={Xiaohua Li and …

The copper extraction of chalcopyrite significantly decreased with the addition of marmatite, but the zinc extraction of marmatite remarkably increased owing to the presence of chalcopyrite, and marmatite dissolved remarkably faster than chalcopyrite. Hence, stepwise bioleaching was feasible for Cu–Zn mixed ores of chalcopyrite and …

Chalcopyrite Leaching by Various Lixiviants with Fe 3+ as an Oxidant. The kinetic results of chalcopyrite concentrate leaching by various lixiviants were shown in Fig. 1.Overall, copper extraction increased gradually for all conditions, and MSA showed slightly better copper extraction than H 2 SO 4 and H 2 SO 3 in most of all conditions. …

Abstract — Chalcopyrite (CuFeS 2 ) is the most common primary mineral used for the commercial production of copper. The low dissolution efficiency of chalcopyrite in sulfate media has prevented an efficient industrial leaching of this mineral in sulfate media. Ferric ions, bacteria, oxygen and other oxidants have been used as …

In this study, a solvometallurgical process for the extraction of copper from sulfidic ore minerals (chalcopyrite, bornite, chalcocite and digenite) was developed by using an organic lixiviant ...

The extraction of copper from chalcopyrite (CuFeS2) by anodic dissolution in an acid electrolyte was studied. The chalcopyrite anodes were massive and not in powder form, with a polished free surface area of 1 to 3 cm2. When an anodic current passed

Copper extraction from a chalcopyrite sample after 20 h of leaching at 60 °C with various ionic liquids. After Carlesi et al. (2016). Based on the investigations reviewed here, it is difficult to establish a unifying theory for the leaching of chalcopyrite with ionic liquids. The studies that we examined were conducted under extremely ...

Copper extraction from chalcopyrite in [EMIm]HSO 4-K 2 Cr 2 O 7 leaching system is closely related to the temperature, the particle size of chalcopyrite, as well as concentrations of ionic liquids and K 2 Cr 2 O 7, while has little to do with stirring speed.

The copper(II) ions in the chalcopyrite are reduced to copper(I) sulfide (which is reduced further to copper metal in the final stage). The iron in the chalcopyrite ends up converted into an iron(II) silicate slag which is removed. Most of the sulfur in the chalcopyrite turns into sulfur dioxide gas.

extraction of major constituents such as copper and iron in chalcopyrite concentrate. Copper and iron dissolution yields from original concentrate could be obtained as about 20% and 22% respectively under the conditions of 0.25 kg/L of APS concentration, 333 K of leaching temperature, 240 min of leaching time, 0.25 mol/L of H2SO4

The copper (II) ion in the chalcopyrite is reduced to copper(I) sulfide which is reduced further to copper metal in the final stages. The iron in the chalcopyrite ends …

Chalcopyrite bio-dissolution plays an important role in the processing of copper sulfide ores. However, due to the slow dissolution rates of CuFeS 2, bio-dissolution processes have not yet found widespread application.In order to enhance the dissolution of chalcopyrite, a novel method for enhancing the dissolution using ozone was proposed …

Research on chalcopyrite leaching represents a great challenge, given its importance as one of the most abundant copper minerals and its significant role in global copper extraction.

Chalcopyrite is the main mineral source of copper ore for extracting and producing copper. However, with the continuous mining of copper ore, the grade of chalcopyrite decreases year by year and its composition becomes more and more complex. The traditional pyrometallurgical extraction process has been unable to make efficient use …

In this study, SDS is used to enhance the sulfuric acid leaching of chalcopyrite in aqueous and isopropanol media. The presence of SDS increased copper extraction into the solution in both solvents. However, it was the "isopropanol–sulfuric acid–SDS" system that proved to be particularly effective for copper recovery from …

The most commonly employed hydrometallurgical process for the oxidation of chalcopyrite and extraction of copper is the sulfuric acid–ferric sulfate system. Reactions (1), (2), (3) are the generally accepted reactions for the extraction of copper from chalcopyrite via oxidation (oxygen, ferric ions) or acid (H 2 SO 4) leaching.

Copper extraction along with electricity generation from the low-grade chalcopyrite was achieved in the column bioleaching process assisted by MFCs. Results showed that after 197days bioleaching of low-grade chalcopyrite, 423.9mg copper was extracted from 200g low-grade chalcopyrite and the average …

The commonest ore used in the extraction of copper is Chalcopyrite (CuFeS 2) also known as Copper Pyrites and other such sulphides. The percentage of copper in the actual ore …

Key words: copper, extraction, electrowinning, chalcopyrite, aqueous solutions, hydrometallurgy, ionic liquids, molten salts, sulfides, electrochemical engineering, renewable energy Abstract The transition to renewable energy infrastructure necessitates rapid growth in copper production, averaging at least 3.5% annually to 2050.