Copper(II) chloride (CuCl 2 ·2H 2 O), sodium sulfide (Na 2 S·9H 2 O), Trisodium citrate (C 6 H 5 Na 3 O 7 ·2H 2 O), NaCl, Sodium dodecyl sulfate (SDS) were obtained from Sinopharm Chemical ...Web

As the largest copper consumer all over the world, China accounts for 55% of the global copper consumption (Elshkaki et al., 2016; ... Low grade copper sulfide ores are obtained from a copper mine, Fujian Province, China, which contain 0.04% free copper oxide, 0.06% primary copper sulfide, 0.64% secondary copper sulfide and 0.01% combined ...Web

Copper is usually found in nature in association with sulfur. Pure copper metal is generally produced from a multistage process, beginning with the mining and concentrating of low-grade ores containing copper sulfide minerals, and followed by smelting and electrolytic refining to produce a pure copper cathode.Web

The power factor (PF) of copper sulfide-based composites as a function of temperature is shown in Fig. 4 f. The PF is improved at low to mid temperatures for copper sulfide with an increasing boron content, which slightly reduces at 773 K since partial carriers tend to be distributed gently and contribute less to the resonance level [59].Web

Smelting of copper sulfide minerals, which are theoretically desulfurized after roasting, and then subjected to reduction smelting to obtain metallic copper; ... (B + C + D grades) of approximately 1.15 …Web

The Monywa copper mine is located in Myanmar (22°07′ N, 95°02′ E) and is one of the largest secondary copper-sulfide mines in Asia [13,14]. The newly operated Letpadaung ore body has an ore reserve of over 1.5 billion tonnes, with an average copper grade of about 0.34%, and a geological reserve of metal copper of over 5 million tonnes.Web

The ICSG Factbook 2020 is a comprehensive source of data and information on the global copper industry, covering production, consumption, trade, stocks, prices and forecasts. The report also provides insights into the environmental, social and economic benefits of copper and its applications. Download the PDF to learn more about the current and future trends …Web

Effects of residues produced by agricultural wastes fermentation (AWF) on low grade copper sulfide ores bioleaching, copper recovery, and microbial community were investigated. The results indicated that adding appropriate bulk of AWF made contributions to low grade copper sulfide ores bioleaching, which may be mainly …Web

A time-saving procedure for boosting the performance of experimental thermoelectric energy harvesters has been developed by a team in China. Recently, copper sulfide (CuS) and copper selenide ...Web

Copper antimony sulfide (CuSbS 2) 10, copper antimony selenide sulfide (CuSbSe x S 2−x) 11 and copper germanium selenide (Cu 2 GeSe 3) 12 have recently been investigated as both nanoflakes and ...Web

Corrosion of copper involves wet chemistry, even when it comes to corrosive gases. These gases dissolve in water and then act as acids. Hydrogen sulfide (H 2 S), sulfur dioxide (SO 2) or nitrogen oxide (NO x) are transformed to the corresponding acids: hydrogen sulfide acid, sulfuric acid and nitrous acid.The most important prerequisite is …Web

Herein, we show theoretical evidence of a new phase of a copper(I) sulfide (Cu 2 S) monolayer, denoted δ-Cu 2 S, with both novel electronic properties and superior oxidation resistance. We find that both monolayer and …Web

The reason why the O content at Position 1 was higher than that at Position Xiao-dong JIA, et al/Trans. Nonferrous Met. Soc. China 33(2023) 1233âˆ'1243 1239 Fig. 7 EPMA mappings of pure cuprite (a) and cuprite treated with 5.0×10âˆ'4 mol/L Na2S (b) 2 was that the copper sulfide species at Position 1 exhibited oxidation behavior, e.g ...Web

2.1.1 Crystal structure of copper sulfides. Copper sulfide ore, which accounts for 80% of the copper resource, is the major source for the metallic copper [1 ]. The major copper sulfide ores contain chalcopyrite (CuFeS 2 5 4 2 S). The concentrates of copper from sulfides ores are generally performed by flotation and then processed by ...Web

Most copper mines in China are sulphide ores which are not suitable for the hydrometallurgical process. Therefore, more than 95% of copper is produced by the pyrometallurgical process. Every 1 ton of copper produced in the smelting process is accompanied by an average of 2–3 tons of copper slag . Copper sulfide concentrate …Web

A new kind of sulfide precipitant, namely, slow release sulfide precipitant (SRSP), was developed and prepared first to realize the selective recovery of copper from an acid leaching solution. The experimental results indicated that SRSP as a precipitant could selectively and efficiently recover copper and the high purity of copper sulfide …Web

Abstract Copper sulfide based phototherapy, ... Shanghai University of Medicine and Health Sciences, Shanghai 201318, China. Email: [email protected] Qiwei Tian, Shanghai Key Laboratory of Molecular Imaging, Shanghai University of Medicine and Health Sciences, Shanghai 201318, China. ...Web

Examples include chalcocite (copper sulfide), galena (lead sulfide), cinnabar (mercury sulfide), and pyrite (iron sulfide). Sulfates, where sulfur and oxygen bind with a cation, are also common ...Web

In recent years, sulphide deposits have been found in transformer failures in China Southern Power Grid, East China and North China for many times [10 – 12]. According to statistics, in a general survey on 201 transformer insulating oils of 500 kV voltage classes by Guangdong Power Grid Company, it is found that 29 of them …Web

Copper is found in nature mainly in the form of sulfide and oxide minerals, and the main copper mines are present in Chile, Australia, Peru, China, the USA, and Mexico . In Chile, the world's largest copper producer, most of the copper is obtained from sulfide ores [ 5, 6 ].Web

Mamatic sulfide-rich nickel-copper deposits related to picrite and (or) tholeiitic basalt dike-sill complexes —A ... Jinchuan (China), Pechenga (Russia), Voisey's Bay (Canada), and Kabanga (Tanzania) (fig. 1). In the United States, this deposit type is represented by the Eagle deposit in northern Michigan, currently underWeb

The copper and silver that form cyanide complexes during the gold cyanidation can cause issues during the activated carbon adsorption, for example, by competing with the gold to be adsorbed, therefore requiring a higher free cyanide concentration . In addition, the mineralogy consists of copper sulfide minerals, as …Web

China's copper deposits are mainly divided into porphyry-type (41%), skarn-type (27%), marine volcanic-type (9.24%), copper-nickel (Cu-Ni) sulfide-type (5.67%) and others (17.09%) . For complex reasons, the majority of the condition of conventional surface and underground mining for copper minerals in China are not very suitable, unlike South ...Web

Copper sulphides are one of the most explored semiconductor metal sulphides because of their stoichiometric and morphological dependent optical and electrical properties, which makes them tunable for numerous optoelectronic applications. Stoichiometrically, copper sulphides exist in numerous structures which varies from the copper-rich phase (Cu2S) …Web

The Tiegelongnan porphyry-epithermal deposit (2089 Mt @ 0.53% Cu, 0.08 g/t Au) is host to a large variety of Cu-sulfide minerals, mainly chalcopyrite, bornite, covellite, digenite, enargite, and tennantite. We used LA-ICP-MS to investigate the trace element geochemistry of the Tiegelongnan Cu-sulfides, as well as pyrite, to understand …Web

In the high-temperature regime, thermal conductivity shows a weak temperature dependence, which is taken as evidence of a highly disordered liquid-like …Web

A novel composite photocatalyst polyaniline/copper sulfide (PANI/CuS) was successfully prepared using an in situ precipitation method. The surface morphology, internal structure, thermal stability, electronegativity, and visible light photocatalytic activity of PANI/CuS were analyzed by a series of characterization methods. Sulfamethoxazole …Web

Herein, we show theoretical evidence of a new phase of a copper(I) sulfide (Cu 2 S) monolayer, denoted δ-Cu 2 S, with both novel electronic properties and superior oxidation resistance. We find that both monolayer and bilayer δ-Cu 2 S have much lower formation energy than the known β-Cu 2 S phase.Web

The authors acknowledge financial support from the National Natural Science Foundation of China (51774328 and 51404300), and the National 111 Project of China (B14034). Recommended articles. ... Complex siliciclastic copper sulfide ores and ultramafic rocky copper-nickel sulfide ores often contain large amounts of Mg-bearing …Web

Many massive sulfide deposits have been discovered in the Upper Paleozoic rift-related volcaniclastic sequence in South China, among which the Yushui copper …Web