The anodic dissolution of chalcopyrite (CuFeS2) in acidic solutions has been studied using cyclic voltammetry with rotating disc and ring-disc electrodes as well as galvanostatic methods.

They are based on the biotechnological application of S° and Fe 2+ oxidizing microorganisms, which generate products capable of promoting the chalcopyrite leaching (Donati et al., 2016, Srichandan et al., 2020). Nevertheless, both alternative methods for extracting copper from chalcopyrite still have a low dissolution rate.

Flotation separation of chalcopyrite/pyrite mixtures under Mg(OH)2 depression effectively limits pyrite entrainment into Cu concentrates. However, the Cu concentrate is still negatively affected ...

Materials and Methods Mineral. Chalcopyrite sample was obtained from Guangzhou in Guangdong province of China. XRD analysis showed that the sample contained 97.83% chalcopyrite and 2.17% quartz. The sample consisted of 33.1% copper, 28.7% iron, and 35.4% sulfur. Sample was ground and sieved to obtain fractional sizes …

Abstract. Geophysical methods are suitable methods for prospecting and exploring mineral deposits. Resistivity and induced polarization (IP) methods are the main methods of geophysical studies on ...

Request PDF | On Jan 1, 2011, D.W. Dew and others published High temperature heap leaching of chalcopyrite: Method of evaluation and process model validation | Find, read and cite all the research ...

The Technology: Robust, aqueous, and economic method of reducing chalcopyrite. This technology is a hydrometallurgical method of extracting copper from chalcopyrite. The technology reduces chalcopyrite using aqueous ions and is effective across a broad concentration range (0.01 M–10 M). This method is more cost-effective …

Pyrite is much more abundant relative to chalcopyrite. Pyrite contains pyrrhotite and chalcopyrite inclusions and is rimmed by chlorite. Green, shreddy biotite constitutes up to 25% of the assemblage and decreases in abundance outward. ... He has worked on numerous research projects worldwide involving the development of methods …

For both economic and technological reasons, froth flotation is the preferred method for separating chalcopyrite from sphalerite ... (Exploring Machinery Plant, Changchun, China) were set to 40 mL and 1660 rpm, respectively. Approximately 2.0 g of each sample was ultrasonically cleaned for 3 min, then rinsed thrice with deionized water …

Copper resources are one of the fundamental resources in the development process of human society, and the most abundant primary copper ore in the world is chalcopyrite (CuFeS 2), which accounts for about 70% of known copper reserves [1,2,3,4,5].The traditional method of extracting copper from copper ore is through …

1. Introduction. Chalcopyrite (CuFeS 2) is one of the primary copper sulphide minerals and it accounts for 70–80% of the global copper (Cu) reserves (Baba et al., 2012, Nyembwe et al., 2019, Schlesinger et al., 2011).Froth flotation is usually applied to concentrate copper ores and separate copper minerals from the gangue. Currently, there …

Different synthesis methods can result in chalcopyrite with varying morphology and band position, which in turn affect the production of ROS and ultimately impact catalytic performance (Bárdos et al., 2018). Several synthesis methods have been reported in AOPs, such as the hydrothermal method, MW-assisted method, solution …

Chalcopyrite (CuFeS2) particles, exposing anisotropic crystal planes during the grinding process, possess comprehensive surface properties that affect their leaching behaviors. In order to investigate the influence of anisotropic crystal planes on the leaching mechanisms, CuFeS2 particles with anisotropic crystal planes were produced by …

Subsequently, exploring an effective separation and recovery route of copper and lead metals is a meaningful and challenging task. ... with froth flotation technology presently being a common method for separating chalcopyrite and galena [7], [8], [9]. During the flotation process, collectors and regulators are added to the pulp to change ...

A method of air oxidation pretreatment at 170 °C was developed for the selective separation of chalcopyrite and galena. Single mineral and artificially mixed mineral flotation experiments indicated that the hydrophobicity of chalcopyrite was greatly reduced, and galena maintained outstanding floatability after pretreatment by high …

Following the method of Zhao et al. (2014b), the chalcopyrite was crushed, washed, and sieved into a 125 to 150 μm size fraction. A pH 25°C~6 acetate buffer solution was prepared by adding 0.055 ...

The chalcopyrite textures are also classified using the DNN models, with an accuracy of 96 %. The proposed DNN models can better discriminate chalcopyrite deposits, ore types, and textures, which is of great significance for applying chalcopyrite as an indicator mineral and exploring the formation mechanism of sulfide-rich magmatic ores.

Carrier-flotation is a method to enhance the recovery by the attachment of fine particles onto larger carrier particles. In this study, the effects of coarse chalcopyrite particles as a carrier on ...

2.2. Chalcopyrite Ore Processing. The first step in the chalcopyrite processing is to liberate the copper minerals and remove waste constituents such as alumina, limestone, pyrite and silica so that the copper and non-ferrous mineral values are concentrated into a product containing between 20 to 30 percent copper.

1. Introduction. It is widely accepted that, in many cases, the heavy metals wrapped in complex sulphide ores are difficult, not-environment-friendly and costly to be leached with conventional mineral processing methods .With the depletion of the easy-to-process ores, the energy costs and the growing movement toward sustainable mining …

Microwave-roasting as an efficient method for extracting copper form chalcopyrite has attracted increasing attention. In this work, the microwave roasted chalcopyrite was pressure leached in 1.0 ...

Aim: To assess the effectiveness of Bacillus subtilis strain LN8B as a bio-collector for recovering pyrite (Py) and chalcopyrite (CPy) in both seawater (Sw) and deionized water (Dw), and to explore the underlying adhesion mechanism in these bioflotation experiments. Materials and methods: The bioflotation test utilized B. subtilis strain LN8B as the bio …

There are many methods for leaching chalcopyrite by hydrometallurgical technology. Oxidation leaching, coordination leaching, and biological leaching are the …

1. Introduction. Copper (Cu) is one of the most fundamental elements with extensive applications in many modern manufacturing industries, and chalcopyrite (CuFeS 2) is the primary sulfide mineral from which copper metal is economically extracted (Mahajan et al., 2007, Mu et al., 2016, Sverdrup et al., 2014).In natural copper deposits, …

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 …

A variety of methods exist to extract copper from chalcopyrite, alternative to the current route, which conceptually dates back to antiquity. Indeed, Baba et al. [9] and Prasad et al. [18] review novel techniques for processing chalcopyrite. Both surveys focus on hydrometallurgical extraction.

Chalcopyrite Dissolution: Challenges. Chapter © 2024. Leaching of Copper from a Nigerian Chalcopyrite-Rich Siderite Ore by Ammonia-Ammonium Sulphate …

Single-phase chalcopyrite (CuFeS 2) is a key reference material in the development of new metallurgical processes to ensure a reliable copper supply. Here, we report on the …

bornite mining method educationcareinInnovations Introduction to Copper Mining Extraction. Chemistry Copper Mining European Copper Institute The main ores of copper are chalcopyrite bornite and malachite In this section we ll look at the ways in The barren rock or gangue has to be separated from the sulfide minerals in order to smelt the …

2021 Theses Doctoral. Exploring the Reductive Pathway for the Hydrometallurgical Production of Copper from Chalcopyrite. Vardner, Jonathan Thomas. The high demand for copper is coinciding with a sharp decline in the grade of copper reserves, and as a result, copper scarcities are expected to arise in the coming decades.