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Copper Sulfide Mining. A peer-reviewed study of the track record of water quality impacts from copper sulfide mines found severe impacts to drinking water aquifers, contamination of farmland, contamination and loss of fish and wildlife and their habitat, and risks to public health. In some cases, water quality impacts were so severe that acid ...


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Copper sulfide - Wikipedia

Copper sulfides describe a family of chemical compounds and minerals with the formula Cu x S y.Both minerals and synthetic materials comprise these compounds. Some copper sulfides are economically important ores.. Prominent copper sulfide minerals include Cu 2 S and CuS ().In the mining industry, the minerals bornite or chalcopyrite, which consist of mixed copper-iron …


attack of copper or silver will form copper sulfide on the surface of the copper. As the sulfur builds up and layers, copper sulfide flakes start to fall off the surface and possibly into some high stress areas where a dielectric failure can occur. Figure 3 shows a copper strip heavily contaminated on the left.


Nov 06, 2019· The formation of sulfide and oxide films on copper (Cu) was studied in chloride solutions with and without added borate and sulfide. Electrochemical experiments demonstrated that Cu sulfide (Cu 2 S) films formed at considerably lower potentials than oxides (Cu 2 O/CuO) films. The growth of Cu 2 S was controlled by a combination of sulfide transport to the …


Feb 20, 2009· Copper sulfide deposition occurred in a certain oil brand and dibenzyl disulfide (DBDS) was found in the oil. There was an incubation period observed before copper sulfide deposition occurred. Copper sulfide deposition was accelerated by temperature. The deposition rate after the incubation period became twice when the heating temperature was ...


sulfide minerals in late-stage veins in the Maggie deposit in British Columbia (Canada), together with a polymetallic assemblage of copper-, zinc-, lead-, and silver-bearing sulfide minerals. Example Deposits There are many important deposits, worldwide (compare Singer and others, 2008). Examples of well-studied giant por-


Flotation of a copper sulphide ore from Okiep using thiol collectors and their mixtures The Journal of The South African Institute of Mining and Metallurgy VOLUME 105 NON-REFEREED PAPER MARCH 2005 201 Figure 1—The final cumulative copper recovery vs. collector dosage obtained with C2-X, di-C2-DTP and di-C2-DTC in the flotation of the Okiep copper ore


Jun 05, 2021· As ore grades constantly decline, more copper tailings, which still contain a considerable amount of unrecovered copper, are expected to be produced as a byproduct of froth flotation. This research reveals the occurrence mechanism of copper minerals in typical copper sulfide tailings using quantitative mineral liberation analysis (MLA) integrated with scanning …


• Mechanism of Sulfide Corrosion Hydrogen sulfide corrosion can occur by two mechanisms: 1) acid attack resulting from the biological conversion of hydrogen sulfide gas to sulfuric acid in the presence of moisture, and 2) direct chemical reaction with metals such as copper, iron .and silver with hydrogen sulfide gas.


Apr 09, 2019· From successive studies, it was noted that the degradation of copper sulfide occurred with an increase in conductivity as well as structural change of the crystal . The structural changes were in turn attributed to the great mobility of copper ions within the crystal, resulting in vacancies at the copper sites inside the copper sulfide lattice. ...


Conditions Contributing to Underground Copper Corrosion. This document is a edited version of an article which appeared in American Water Works Association Journal, August 1984 and is reprinted, with permission from American Water Works Association.. By J.R. Myers JRM Associates, 4198 Merlyn Drive, Franklin, OH 45005 A. Cohen Copper Development …


Aug 04, 2017· The copper sulfate test is a visual method of determining the existence of free iron in specifically stainless steel. In many cases, the copper sulfate test is used as a pass/fail examination of a passivation process on a part or stock material, but it can also be used as a test to determine if passivation is necessary in the first place.


copper sulfides occurred in the form of sulfide aggregates, and coarse grains of sulfide aggregates were the most common f orm of copper minerals (Ruan et al., 2011). T he gangue minerals included


Jun 10, 2021· Sulfide copper and nickel mining should never be attempted on the border of the BWCA. As a lifelong engineer and miner and a native Minnesotan, I feel it is my duty to say this. The threat to the ...


Copper sulfide deposition occurred in a certain oil brand and dibenzyl disulfide (DBDS) was found in the oil. There was an incubation period observed …


Jun 09, 2021· Copper on LL chondrites is found in Fe-Ni metal and as native Cu 36, and a localized shock event could lead to the mixing of Cu metal with iron-sulfide to form a …


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12.3 Primary Copper Smelting

Pyrometallurgical techniques use heat to separate copper from copper sulfide ore concentrates. Process steps include mining, concentration, roasting, smelting, converting, and finally fire and electrolytic refining. 12.3.2 Process Description2-4 Mining produces ores with less than 1 percent copper. Concentration is accomplished at the


Jun 28, 2016· of copper sulfides . Conclusions . Hydrothermal alteration in low petrologic types! Bornite . Isocubanite, Chalcopyrite . Formation > 210 °C; equilibration to ≤140 °C . Following pre-accretionary heating, the sulfide nodules cool, and bornite lamellae form. The nodules are then accreted to the ൰arent body.


Dec 01, 2016· Batch leaching test (Ref 2) showed that the total soluble copper concentration actually was decreased during leaching. However, decrease in cupric ion concentration (from 33.5 to 17.9 g/L) proved that remarkable sulfide mineral oxidation occurred and not only copper precipitation. The mineralogical leaching residue analysis showed the presence ...


An excess of copper (II) sulfate solution (to make sure that all the iron is reacted) will be added to a known amount of iron. The metallic copper produced will be weighed. These weighings will be used to calculate the moles of iron used and the moles of copper formed. If equation (1) is correct, the moles of copper should equal the moles of iron.


Sep 01, 2020· In process scheme 1, indirect bioleaching (IBL), the ore bed porosity is assumed to be completely filled with the leaching solution and leaching of copper sulfides occurred just with the 3 g/L of ferric contained in the incoming leaching solution produced in an external bioreactor (Pakostova et al., 2017; Biomore, 2018).


It could be possible that some type of side reaction occurred creating a product that was not copper (I) sulfide. We learned from reading about copper-sulfur compounds that copper (II) sulfide melts at a temperature of 103 C (p. 4-50 of the CRC handbook of Chemistry and Physics, 74th Edition), so our product could not have been copper (II ...


The White Pine copper deposit is located near White Pine, Michigan, about 70 km southwest of the main native-copper producing area. It is in the Iron River syncline, just east of the Porcupine Mountains. The ore at White Pine is in the Nonesuch Shale, and consists mainly of the copper sulfide mineral chalcocite (Cu 2 S). Although the presence ...


May 03, 2021· With the first drill hole of the 2021 program, 24 metres of Canbelego style copper sulphide mineralisation was found at the predicted target position. The initial diamond drill successfully extended the copper mineralisation approximately 40 metres down-dip from the existing mineralisation.


Copper sulfate is an inorganic salt that is highly soluble in water. 3,4 The copper ion is the component of copper sulfate with toxicological implications. 3. Copper is an essential mineral, and the recommended dietary allowance of copper for human adults has been set at 900 µg/day. 5.


Copper is an essential trace element that is included in some over-the-counter multivitamin and mineral supplements, even though copper deficiency is quite rare and supplementation is rarely needed. The amounts of copper found in typical supplements has not been associated with serum enzyme elevations or with clinically apparent liver injury. However, accidental or …


Copper sulfide (CuS2) | CuS | CID 165914 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities ...


Ultrathin two-dimensional (2D) semiconductors exhibit outstanding properties, but it remains challenging to obtain monolayer-structured inorganic semiconductors naturally occurring as nonlayered crystals. Copper sulfides are a class of widely studied nonlayered metal chalcogenide semiconductors. Although 2D copper sulfides can provide extraordinary …


Although 2D copper sulfides can provide extraordinary physical and chemical applications, investigations of 2D copper sulfides in the extreme quantum limit are constrained by the difficulty in preparing monolayered copper sulfides. ... The following studies revealed that the metal-metal bonding occurred not only in copper-alkanethiolate complex ...


Of the various copper sulfides in the Earth's crust, chalcopyrite is by far the most common. This mineral is also the most difficult to leach, with hydrometallurgical extraction processes characterised by prohibitively slow kinetics. While a number of processes, including leaching at atmospheric pressure and temperature, pressure leaching at higher temperature, and …


Feb 20, 2009· The deposition of copper sulfide occurred after 144 h of heating at 140deg without these passivators. However, little deposition of copper sulfide occurred even after 432 h of heating when either of these passivators was added to the oil. The concentration of dissolved copper significantly decreased when either of these passivators was added to ...


Metal sulfide nanoparticles have recently been discovered in natural environments subject to fluctuating redox conditions such as wetlands and river floodplains, which are often very rich in natural organic matter (NOM). Strong binding of chalcophile metals like copper by NOM is expected to interfere with su Recent Open Access Articles Environmental Science: Nano …