Minerals | Free Full-Text | The Effect of an Anionic …
High-molecular-weight polymers based on anionic polyacrylamides (PAMs) are used as tailing flocculants in mineral processing plants. The recirculation of water recovered from the tailing thickeners to the flotation process introduces residual PAMs, which can impact the flotation of important copper sulfides like chalcopyrite, bornite, …
Biodissolution of pyrite and bornite by moderate thermophiles
XRD and XPS results showed that ore residues contained jarosite, and the dissolving residue of bornite contained elemental sulfur. The dominant bacterial genus in pyrite dissolution was A. caldus, and L. ferriphilum in bornite dissolution. To sum up, microbes significantly accelerated the mineral dissolution process and promoted the …
A comparative study of electrochemical behavior of …
The formation of soluble species from a bornite flotation concentrate pre-treated with hydrochloric acid was studied. Copper recovery after a leaching in a H2SO4-NaCl solution was determined.
Synchrotron XPS studies of solution exposed chalcopyrite, bornite…
Chalcopyrite, CuFeS 2, is an important source of copper and is recovered from ore by the flotation process. Chalcopyrite is commonly associated with other metal sulfides, e.g. bornite, Cu 5 FeS 4.In this study the effect of bornite on the oxidation and leaching of chalcopyrite has been investigated by probing the surface evolution of pure …
Effect of mineralogy on grindability
The dominant copper minerals were identified by optical microscopy and mineral chemistry derived from SEM-EDS analysis. The sample designated sulphide 1 was bornite-rich, sulphide 2 ore was mainly chalcopyrite, and the oxide ore was predominantly malachite and minor azurite. The gangue minerals were identified using semi-qualitative XRD analysis.
Bornite
The mineral system characteristics of the Sudbury Ni-Cu-Co-PGE sulfide ore deposits. Peter C. Lightfoot, in Nickel Sulfide Ores and Impact Melts, 2017 The principal Cu-Fe-S minerals. The principal Cu-Fe-S minerals are chalcopyrite, cubanite, and bornite (Table 4.2).Chalcopyrite accounts for by far the major part of the Cu in the Sudbury deposits.
Bornite (Peacock Ore) – Occurrence, Properties, and …
Bornite can be identified in the field by its color variations of copper red, bronze brown and purple. Its opaque form has {111} imperfect cleavage. This mineral has a metallic luster …
Most Common Copper Minerals
Copper minerals can be broadly classified into sulfide minerals, oxide minerals, and native copper. The most common copper mineral is chalcopyrite, a sulfide mineral that contains about 34% copper by weight. Other important copper minerals include bornite, chalcocite, and malachite. These minerals can occur in a wide range of …
Predictive Geometallurgical Modeling for Flotation …
The findings contribute to a deeper understanding of mineral processing challenges and offer valuable insights for future exploration and ore processing strategies. ... C12, C13, C15, and C16, chalcopyrite is the leading copper mineral (78.6%), followed by chalcocite (15.1%) and bornite. The other minerals are present in less than (1.3%) of …
A review on bornite (bio)leaching
In the chemical leaching process, the low rest potential minerals like bornite will be preferentially dissolved while pyrite will be protected as the cathode and the quality of pyrite is not significantly reduced, so it can be considered to act as catalysts (Ahmadi et al., 2012, Koleini et al., 2010). The addition of pyrite can significantly ...
Shades of Bornite: Exploring the Rainbow of This Unique Mineral
The play-of-color in bornite is caused by light refracting off a thin oxide layer that forms on the surface. This is why bornite must be exposed to air and moisture to develop its magical iridescence. Bornite earned the nicknames "peacock ore" and "purple copper ore" due to its resemblance to the vibrant colors seen on peacocks' feathers.
Sulfide Minerals
The sulfide mineral specimens you see in rock shops come from the deep levels of mines, and most display a metallic luster. Bornite (Cu 5 FeS 4)is one of the lesser copper ore minerals, but its color makes it highly collectible. (more below) Bornite stands out for the amazing metallic blue-green color it turns after exposure to the air.
Bornite Mineral Data
Bornite Isomertieite Arsenopalladinite Gold. Comments: Light grayish grain of intimately intergrown isomertieite and arsenopalladinite (in the center of the picture), with pale yellow gold and brownish to violet bornite.Polished section (from microprobe analysis) in reflected light. Location: Noril'sk, Putoran Mts, Taymyrskiy Autonomous Okrug, Eastern-Siberian …
Solved 2. A steam in a mineral processing plant is found to
2. A steam in a mineral processing plant is found to comprise 10.05% bornite and 20.12 % chalcopyrite and an unknown amount of pyrite. Assuming these are the only Cu-bearing and Fe- bearing mineral, calculate i. The Cu assay (%Cu). (2 mark) ii. The assay of pyrite if the total Fe assay is 24.34%. (4 marks) Give answer to 2 decimal places.
A new mode of mineral replacement reactions involving …
Solid-state diffusion is a very slow process in most minerals at low temperatures, but rapid cation diffusion in bornite-digenite solid solution and copper-sulfides has been reported (Grguric and Putnis, 1999, Mayer et al., 2011), and was attributed to the crystal structure of these phases (Grguric and Putnis, 1999). We …
Insights into the Surface Transformation and …
Minerals 2018, 8, 173 2 of 22 regarded as a reverse biomineralization process. Therefore, the research on the surface transformation and dissolution process of bornite in the presence of ...
Copper processing
bornite 63.3 enargite 48.4 tetrahedrite 34.8 Oxide ores cuprite 88.8 tenorite 79.9 malachite 57.5 azurite 55.3 ... The first step, mineral processing, is to liberate the copper minerals and remove waste constituents—such as …
Copper processing
bornite 63.3 enargite 48.4 tetrahedrite 34.8 Oxide ores cuprite 88.8 tenorite 79.9 malachite 57.5 azurite 55.3 ... The first step, mineral processing, is to liberate the copper minerals and remove waste constituents—such as alumina, limestone, pyrite, and silica—so that the copper minerals and other nonferrous minerals of value are ...
The Genesis and Spatial Distribution of Ore Mineral Species …
The sulfide ores include bornite, chalcocite, covellite, and chalcopyrite, while the oxide ores consist of malachite, azurite, and cuprite. ... of geometallurgical modelling to mine planning in a copper-gold mining operation for improving ore quality and mineral processing efficiency. The Journal of African Institute of Mining and Metallurgy ...
Bornite: Mineral information, data and localities.
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams. Please only use the official …
A comparative study of electrochemical behavior of …
0.2 g of mineral (chalcopyrite, bornite or chalcocite) in an agate mortar. The resulting powder was added with 0.8 ml of silicon oil (Aldrich) and this was mixed to form a
Electrochemistry of sulfide mineral flotation | Mining, …
The use of various electrochemical techniques to study mechanisms of sulfide mineral-flotation reagent interactions is briefly reviewed in this paper. Prior to such studies it is desirable to thermodynamically determine solution conditions favorable for formation of hydrophobic species deemed to be responsible for flotation. The thermodynamic …
Bornite peacock ore: The mineral Bornite information and …
Bornite is an ore mineral of copper, and is known for its iridescent tarnish. "Peacock Ore", which is sold to amateur mineral collectors and tourists, is often labeled as a variety of Bornite.However, most Peacock Ore in reality is Chalcopyrite treated with acid, which produces a strongly-colored iridescent tarnish.Bornite is named for Ignatius von Born, …
Electrochemical interaction of bornite with grinding media …
Mineral Processing and Extractive Metallurgy Transactions of the Institutions of Mining and Metallurgy: Section C Volume 117, 2008 - Issue 4. Submit an article ... The electrochemical interaction and pulp chemistry during grinding of bornite were investigated by measuring the E h, dissolved oxygen, rest potential and polarisation …
A review on bornite (bio)leaching
This review mainly summarizes previous and recent studies on bornite (bio)leaching. Chemical and biological dissolution of bornite, the influence of associated minerals on bornite leaching, the intermediate transformation, and possible surface layers in the leaching process were further discussed. The addition of bacteria significantly …
The surface properties of bornite
The surfaces of fresh and tarnished (through exposure to the atmosphere) bornite have been studied by measurement of reflectance and quantitative colour …
Investigating the Influence of the Electrochemical …
The rest potential can be exploited to preferentially float one mineral over another as these properties result in different regions of flotation stability for different minerals. Bornite and ...
Minerals | Free Full-Text | Investigating the Influence of the
Beneficiation of sulphide ores by flotation is ascribed to the natural electrochemical activity associated with sulphide minerals. Flotation is an electrochemical process comprising many interdependent conditions that are difficult to decouple in terms of controlling flotation performance. The extent of electrochemical activity is mineral …
Applications of electrochemical techniques in mineral analysis
Carbon paste electroactive electrodes as a working electrode could be made by mixing minerals (chalcopyrite or bornite or mixture of chalcopyrite and bornite), graphite and solid paraffin ... Accompanying with new methods to pre-processing the solid minerals into solution phase, EC assays will be more appropriately used in analyzing …
Bornite Mineral Data
Bornite Isomertieite Arsenopalladinite Gold. Comments: Light grayish grain of intimately intergrown isomertieite and arsenopalladinite (in the center of the picture), with pale …