The most obvious physical properties of chalcopyrite are its brassy yellow color, metallic luster, and high specific gravity. These give it a similar appearance to pyrite and gold. Distinguishing these minerals is easy. Gold is soft, has a yellow streak and has a much higher specific gravity. Chalcopyrite is brittle and has a greenish gray streak.
Effect of pH on the flotation behavior. Previous studies have demonstrated that the slurry pH is a vital factor for pyrite and chalcopyrite flotation (Zhang et al. 2023b).Here, the influence of pH on the depressing capacities of KMnO 4 (3 min of treatment) for pyrite and chalcopyrite were determined by flotation tests in the pH …
Associations: Chalcopyrite is commonly found in association with other minerals such as pyrite (fool's gold ), sphalerite (a zinc ore), galena (a lead ore), and …
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).
Chalcopyrite has a chemical composition of CuFeS2, which indicates that it is composed of copper (Cu), iron (Fe), and sulfur (S) atoms. It is a sulfide mineral, with copper and iron being the main cations and …
Fig.3 Adhesion of A. ferrooxidans to chalcopyrite Fig.4 Adhesion of A. ferrooxidans to pyrite Our results suggested that the presence of EPS on the cell surface of A. ferrooxidans is an important factor for the attachment to chalcopyrite and pyrite. These results were in agreement with those obtained by GEHRKE et al[7] with pyrite.
Since the positions of these peaks are very close, especially S 2 2-from pyrite and S 2 2-from chalcopyrite, it is difficult to further decouple them precisely (Smart et al., 1999). Furthermore, a broad peak was observed at 168.2 eV in the regrinding product, which is attributed to sulfate SO 4 2 - ( Buckley and Woods, 1984 ).
Sarquís et al. [27] ... Pyrite and chalcopyrite would be simultaneously floated, which would result in separation difficulty in their mixed system. With TA addition, the pyrite flotation recovery significantly decreased, whereas that of chalcopyrite was only slightly affected. This result is in agreement with the adsorption results.
DFT studies on pyrite are much more common than on chalcopyrite, including bulk crystal properties and surface adsorption. Hung et al., 2003, Hung et al., 2004 simulated the structure and properties of the hydrogen xanthate molecule (HOCS 2 –) and its adsorption characteristics on the pyrite (1 0 0), (1 1 0), and (1 1 1) surfaces. …
The study of Han et al. showed that the pyrite addition significantly promoted on the dissolution of copper from chalcopyrite due to the production of sulfuric acid from pyrite under pressure-oxidative condition. Under the obtained optimal conditions in the study, copper extraction of 94.5% was achieved after 90 min leaching, while a ...
To effectively separte pyrite from chalcopyrite, tetrazine thione group and hydrocarbon chain were combined to synthesize tetrazine thione collectors. ... HAN Guang, WEN Shu-ming, WANG Han, et al. Pyrogallic acid as depressant for flotation separation of pyrite from chalcopyrite under low-alkalinity conditions [J]. Separation and Purification ...
The IEP of the chalcopyrite sample used in this investigation is close to the value reported by other researchers, namely around pH 3.0 (Rath et al., 2001).However, Mitchell et al. (2005) have reported an isoelectric point at pH 5.5 for a chalcopyrite sample containing 65% chalcopyrite. This chalcopyrite content is equal to that of the sample …
separation of chalcopyrite and pyrite. Jin et al.16 revealed that the simulated contact angle of a fresh unoxidized pyrite (100) surface decreased from 70.0 to 24.0 after the adsorption of ferric hydroxide using molecular dynamics simulation, which showed that pyrite could be inhibited by ferric hydroxide without any oxidation. Zhao et al.17 gave
Pyrite is hard enough that it cannot be scratched with a nail, but chalcopyrite is easily scratched with a nail. The name " fool's gold " is most often associated with pyrite …
Chalcopyrite is a copper iron sulfide mineral, having a tetragonal crystal system. It was named after the Greek word chalkos, meaning copper, and pyrites, meaning strike fire.
Li et al. 15 used potassium ferrate (K 2 FeO 4) as an oxidant to inhibit pyrite in weakly alkaline seawater and realized the effective separation of chalcopyrite and pyrite. Jin et al. 16 revealed that the simulated contact angle of a fresh unoxidized pyrite (100) surface decreased from 70.0° to 24.0° after the adsorption of ferric hydroxide ...
On the continents, pyrite and chalcopyrite from the Grasberg Cu–Au deposit ... A pioneering advance in closing the gap between nature and laboratory has been made by Syverson et al. (2013) who conducted pyrite precipitation experiments at 300 and 350 °C in S-bearing acidic saline fluids and found that even at such high temperatures, ...
1. Introduction. Pyrite, FeS 2, and chalcopyrite, CuFeS 2, are both abundant on Earth and are often found together in nature.Besides their coexistence in nature, it has been well established in the field of metallurgy that pyrite and chalcopyrite form a galvanic couple (Berry et al., 1978, Mehta and Murr, 1983, Dixon et al., 2008, Majuste et al., 2012).
Separating chalcopyrite, an important copper-containing ore, from pyrite is an important mineral-processing objective. Herein, we report the synthesis of S-hydroxyethyl-O-isobutyl xanthate (HEIBX), a novel surfactant bearing both hydroxyl and thione groups, through the attachment of a hydroxyethyl group to sodium isobutyl …
Reflected light photomicrograph of pyrite-chalcopyrite-hematite-magnetite mineralization from Intercept Hill, with an LA-ICPMS trace element image of pyrite. ... Additionally, some of Reich et al.'s (2016) pyrite analyses contained nearly 1000 ppm Au, which they attributed to the presence of clustered Au nano-inclusions. Although this may …
1. Introduction. As an important metal raw material, copper is widely used in the fields of daily necessities, industries, and national defenses (Schipper et al., 2018).Chalcopyrite (CuFeS 2) is the primary source of commercial copper metal and it is often associated with pyrite in ore deposits (Ignatkina et al., 2018).In order to obtain …
A satisfactory separation of chalcopyrite and pyrite was achieved at weakly alkaline condition (pH 8), at which the flotation recovery of chalcopyrite was 86.11% and that of pyrite was only 13.85%. ... Wang et al. [18] reported that GM could be used as a molybdenite depressant for the separation of molybdenite and chalcopyrite, …
This is different from that in chalcopyrite, where no S–S bond exists. Based on these structures, the chalcopyrite and pyrite were modelled along with their most common cleavage planes, such as CuFeS 2 (1 1 2) (Oliveira et al. 2012) and FeS 2 (1 0 0) (Rosso et al., 1999). The calculated slabs were 15 layers thick and separated by 20 Å of …
SEM back-scattered electron images of chalcopyrite from different mineralization stages from the quartz monzonite (a-c) and the latite (d-f): (a) chalcopyrite (Cpy) is intergrown with pyrite (Py ...
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). The existence of pyrite exerted a remarkable negative effect on the enrichment of chalcopyrite concentrates …
The differences in physical and chemical properties between chalcopyrite and pyrite surfaces were elucidated. The differential modification mechanism of chalcopyrite and pyrite was further supported using mineral surface wettability testing. Thus, T·f successfully achieved laboratory-scale copper–sulfur separation as a …
Pyrite Group. The isometric (cubic) polymorph of orthorhombic marcasite.However, some pyrites may be trigonal (pseudo-cubic; Moëlo, 2023). Compare UM1997-43-S:Fe. Pyrite is a very common mineral (also one of the most common natural sulfides, and the most common disulfide), found in a wide variety of geological formations from sedimentary …
Chalcopyrite is super common — it's actually the most abundant source of copper on Earth, and it's been mined for millennia. In this guide, we'll go over all of the chalcopyrite uses, benefits, and properties, along with …
Thus, effectively separating chalcopyrite and pyrite under low alkaline conditions is an attractive trend in the flotation industry (Han et al., 2019, Liu et al., 2006). Over the past years, considerable efforts have been made on developing and optimizing the depressants to separate chalcopyrite from pyrite (Khoso et al., 2019a, Liu et al ...
According to Fig. 1 a, in the absence of pyrite both the anodic and cathodic half-cell reactions take place on the chalcopyrite surface. Dixon et al. (2009) claim that the slow dissolution rate of chalcopyrite is because of a slow cathodic half-cell reaction at the surface of chalcopyrite. That means that if the rate of the cathodic half-cell reaction …
Furthermore, the accidental activation of pyrite by Cu 2+ dissolved from chalcopyrite can also bring extra difficulties to the separation process of chalcopyrite from pyrite (Liu et al., 2009; LI ...
Magmatic sulfide deposits consist of pyrrhotite, pentlandite, chalcopyrite (± pyrite), and platinum-group minerals (PGM). Understanding the distribution of the chalcophile and platinum-group element (PGE) concentrations among the base metal sulfide phases and PGM is important both for the petrogenetic models of the ores and …
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) (Figure 32). The addition of zinc sulfate (2000 …
Pyrite is easily activated due to the galvanic interactions and the existence of copper ions dissolved during grinding and flotation (Mu et al., 2018, Peng and Grano, 2010, Qin et al., 2015). Therefore, the separation of chalcopyrite from pyrite has always been a challenge in mineral processing field.
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. …
Yin et al. [14] studied the surface oxidation of chalcopyrite in alkaline condition and observed that when the electrode potential increased from −0.6 V to 0.02 V vs. SCE at pH = 9.2, the iron atoms on the chalcopyrite surface were oxidized to Fe 2 O 3 and Fe(OH) 3, but the copper remained unoxidized.
Chalcopyrite and pyrite are sulfide minerals, which comprise sulfur and metals. Chalcopyrite is mostly iron and copper, while pyrite is mostly iron. Their ability to conduct electricity is affected by the fact that they are made of metal.
Formula: CuFeS2. Colour: Brass yellow, often with an iridescent tarnish. Lustre: Metallic. Hardness: 3½ - 4. Specific Gravity: 4.1 - 4.3. Crystal System: Tetragonal. Member of: …
We have compiled the trace element concentrations in pyrrhotite, pentlandite, chalcopyrite, and pyrite from magmatic Ni-Cu-PGE ore deposits with the aim of understanding their petrogenesis and whether these minerals can be used as indicator minerals. Among the samples, there are some of the most studied world-class Ni-Cu- (Aguablanca, Duluth, …
