A thermodynamic and kinetic model is proposed to explain the formation of bornite, chalcopyrite, and magnetite during partial roasting of enargite-containing copper concentrates. The proposed mechanism involves solid–solid–gas and solid–gas reactions between chalcocite, pyrrhotite, gaseous sulfur, and oxygen. Bornite formation could be …

In addition to the spot analyses, LA-ICP-MS element maps were generated for trace elements present in the pyrite-chalcopyrite assemblage (Py1 in stage I). The first set of images of Py1 associated with chalcopyrite displays an euhedral to subhedral pyrite structure. ... The Co/Ni ratio is widely used to identify the origins of pyrite (Bralia et ...

As pyrite is more easily oxidized than chalcopyrite (Hong et al., 2017), the selective flotation separation of Cp from Py can be achieved. Various oxidants are used in the flotation of sulfide minerals, including NaClO, KMnO 4, Na 2 FeO 4, H 2 O 2 and O 3, et. al, and play vital role in the depression of pyrite (Yang et al., 2022). Therefore ...

The concentrations of trace elements in chalcopyrite, sphalerite and galena are the result of lattice-bound solid solution or mineral inclusions (Cook et al., 2009, George et al., 2015, George et al., 2018, George et al., 2016). As this study is focused on defining physicochemical conditions across the Cu to Pb-Zn transition, only the trace ...

Stoichiometric Fe concentrations were used for pyrite and chalcopyrite. MASS-1 (Wilson et al. 2002) was used as the external standard for all elements. In addition, two measurements on NIST SRM 610 (NIST 2012) were included with every standard block for quality control. A block of two to three standard measurements was inserted before …

Nowadays, froth flotation of chalcopyrite ore has developed a large number of reagents that make it possible to improve the mineral's buoyancy conditions, both in …

Grinding media have significant influence on the flotation of chalcopyrite and pyrite. This effect is mainly related to the change in the surface properties of chalcopyrite and pyrite. ... galvanic interaction between …

Several hundred sulfide minerals are known, but only five are sufficiently abundant accessory minerals to have been categorized as 'rock forming' (Bowles et al. 2011). These five are pyrite, pyrrhotite, galena, sphalerite and chalcopyrite, and it is the iron sulfides (pyrite and pyrrhotite) which are dominant.

PDF | On Mar 30, 2024, He Zhang and others published Enrichment of precious metals associated with chalcopyrite inclusions in sphalerite and pyrite | Find, read and cite all the research you need ...

Current flotation practices using lime or cyanide as depressants in chalcopyrite and pyrite separation have significant disadvantages, such as substantial reagent consumption, high slurry pH, and environmental hazards. This work aimed to explore the utilization and mechanisms of tannic acid (TA) as an eco-friendly alternative …

Pyrite and chalcopyrite, as the important products occurring in almost every stage of black smoker growth, can offer great potential for tracing the stability and variability of hydrothermal systems through study of their element geochemistry (Fouquet et al. 1998; Maslennikov et al. 2009; Revan et al. 2014).

1. Introduction. Chalcopyrite (CuFeS 2) is referred to as a main copper-bearing sulfide mineral, which is generally associated with many gangue minerals, particularly pyrite (FeS 2).Pyrite is an ubiquitous component of sulfide minerals, but its presence in chalcopyrite deposits usually leads to a marked decrease in Cu grade and …

1. Introduction. Pyrite is the most abundant sulfide in the Earth's crust and characterised by wide variations in composition (Abraitis et al., 2004, Deditius et al., 2014, Gregory et al., 2015).One of the most abundant impurities in pyrite is arsenic (As), and pyrite with As content above about 1 wt% As is commonly referred to as arsenian pyrite …

Chen et al. 24 showed that tetrasodium iminodisuccinate (IDS) can effectively eliminate the adverse effect of serpentine on the flotation of pyrite, suggesting that tetrasodium iminodisuccinate ...

In their study, the pyrite proportion was varied between 0 and 80% and balanced with chalcopyrite. They observed that both chalcopyrite and pyrite recoveries decrease as pyrite content increases and contributed this to an increased amount of hydrophilic species (FeOH + and SO 3 − et al.) on chalcopyrite and pyrite surfaces. …

Zinc sulfate (ZnSO 4) has been used to separate the chalcopyrite/pyrite system, and only acts as a depressant when it is in hydroxyl ions . He et al. showed the recovery of pyrite and chalcopyrite as a function of flotation time and ZnSO 4 concentration with pulp at 275 mV (SHE) . The addition of zinc sulfate (2000 g/t) caused, after 8 min of ...

It is found in massive sulfide deposits associated with pyrite, sphalerite, galena and chalcopyrite. At times it is intergrown with rare nickel minerals such as pentlandite. FLORENCE COUNTY: Pyrrohotite is found associated with pyrite in several horizons in metasedimentary rocks recovered from drill core from the Bass Lake area, T.38N. R.17E.

XPS study by Buckley and Woods (1984b) showed that freshly fractured chalcopyrite surfaces exposed to air formed a ferric oxyhydroxide overlayer with an iron-deficient region composed of CuS 2.Acid-treated surfaces of fractured chalcopyrite showed an increase in the thickness of the CuS 2 layer and the presence of elemental sulfur. Hackl et al. (1995) …

In natural copper deposits, chalcopyrite is frequently found in association with other iron-containing gangue sulfides, particularly the pyrite (FeS 2) with comparatively low commercial value ( Chen et al., 2021, Huang et al., 2019d ).

Being the most abundant copper sulfidic mineral, chalcopyrite (CuFeS2) is refractory to conventional hydrometallurgical methods, the result of which is incomplete or inefficient dissolution of copper. The complete dissolution in the presence of silver (Ag) catalyst was proved under optimized operating settings. The catalytic yield reached its …

Flotation separation of chalcopyrite from pyrite using lime or cyanides as depressants results in serious problems, such as the blockage of pipelines and …

According to Monecke et al. (2014), chalcopyrite is the main host of Se in VMS and SMS deposits along with pyrite and, ... Pyrrhotite, pyrite, sphalerite, and chalcopyrite. A pyrite crystal shows microporosity in its core and massive overgrowth bands. D) Subhedral magnetite crystal surrounded by massive sphalerite, the latter also …

The dissolution of minerals obeys the order of the rest potentials. It was reported that when copper sulfide ores (containing bornite, chalcopyrite and pyrite) are bioleached with A. ferrooxidans, pyrite and chalcopyrite were more recalcitrant to acid leaching and bacterial oxidation compared with bornite (Bevilaqua et al., 2010).

Pyrite (FeS 2, iron disulfide), is the most abundant sulfide mineral and commonly associated with valuable minerals such as sphalerite, chalcopyrite, galena, …

The oxidation of chalcopyrite and pyrite was examined using Fe-K - and Cu-K-edge REFLEXAFS spectroscopy.The Fe XANES of the pyrite proved to be a very sensitive indicator of oxidation, revealing the development of a goethite-like surface species; the EXAFS data showed an increasing O:S ratio with the degree of oxidation and gave …

Shen et al. [50] used pure pyrite and chalcopyrite samples to investigate the LBG's depression effectiveness in the flotation separation when using sodium butyl …

Edwards et al. 2003; Konhauser et al. 2011; Bellenberg et al. 2015 ) because it is commonly associated with valuable min- erals such as sphalerite, chalcopyrite, and galena ( Chandra

Based on textural, mineralogical, geochemical and structural criteria, three distinct types of gold and telluride mineralization have been differentiated in the Kalgoorlie district (Mueller et al. 1988; Clout et al. 1990; Bateman and Hagemann 2004).Fimiston style mineralization is characterized by shear-zone and breccia-hosted ankerite-sericite-pyrite …

1. Introduction. Chalcopyrite (CuFeS 2) is found associated with pyrite (FeS 2) and as such their separation is paramount for the beneficiation of copper because chalcopyrite is the main source of copper in the world (Davenport et al., 2002).One of the methods used to separate minerals is flotation via collectors to increase the …

The Vathi porphyry Cu-Au±Mo deposit is located in the Kilkis ore district, northern Greece. Hydrothermally altered and mineralized samples of latite and quartz monzonite are enriched with numerous rare and critical metals. The present study focuses on the bulk geochemistry and the mineral chemistry of pyrite, chalcopyrite, magnetite, …

Dong et al. also reported a noticeable improvement of copper bioleaching with 50 g·L –1 fine quartz particles (<43 μm) in the leach solution. ... (Res_AL and Res_L-AL), the overall quantities of chalcopyrite and pyrite in the residue were less than 10 and 5 g, respectively, which are consistent with the high leaching yields. ...

Early magnetite ± hematite ± chalcopyrite ± pyrite veinlets, with potassic alteration halos are the first stage of the porphyry mineralization at Fakos. ... A., Chryssoulis, S., Li, J.-W., Ma, C.-Q., …

The main ore minerals include pyrite and arsenopyrite with minor chalcopyrite, tetrahedrite, galena, and native gold (Zhang et al., 2020). At Huangjindong, gold mainly occurs within arsenopyrite or pyrite with gold concentrations of several hundreds of parts per million in pyrite ( Zhang et al., 2020 ).

As the trace element content of chalcopyrite is controlled by its crystal structure, partitioning with co-crystallizing minerals, and magma/fluid composition, this variability probably reflects the geological environment in which it formed (George et al. 2016, 2018), thus making it a potential indicator for provenance studies (Duran et al. 2019 ...