copper oxide sulphidation

The sulphidation of copper-rich Cu–Ag alloys in H

The sulphidation of two copper–silver alloys containing 5 and 10 wt.% silver (Cu–5Ag and Cu–10Ag, respectively) was investigated over the temperature range 550–750°C in H 2 /H 2 S mixtures under sulphur pressures below the dissociation of Ag 2 S. External scales, composed mainly of cuprous sulphide, often containing some (Cu,Ag) …

High Sulphidation Gold Deposits

View PDF. High-Sulphidation Gold Deposits – A Summary Michael B. Thomsen August 2006 Abstract High-sulphidation gold systems are a unique and increasingly important type of mineral deposit. These systems are formed within a vertical continuum from shallow epithermal environments to the upper portions of porphyry copper/gold deposits.

Standard Gibbs free energy profile for step-wise (0, 25, 50, …

Numerous studies have shown that oxygen containing corrosion products of copper (e.g. Cu 2 O, CuO, and Cu 2 Cl(OH) 3 ) are unstable in sulphide solutions, and that the copper oxides are converted ...

Copper (II) Oxide | Formula, Properties & Application

As the name suggests, Copper (II) Oxide consists of one copper atom (Cu) and one oxygen atom (O). The 'II' in its name signifies that the copper ion in this compound has a +2 oxidation state. This is a result of copper losing two of its electrons to oxygen, which is more electronegative. The compound's structure is characterized by a ...

The atmospheric corrosion of copper by hydrogen

Abstract. The atmospheric corrosion of copper by hydrogen sulphide has been followed during field tests using different sulphide concentrations, for 77 days, and during exposure to a well-defined synthetic atmosphere in a test chamber. The main components formed at the surface of the samples are copper oxides and sulphide.

A regenerable oxide-based H2S adsorbent with nanofibrous …

This is often achieved using metal oxides as reactive adsorbents, but metal oxides perform poorly when subjected to repeated cycles of sulphidation and re-oxidation1,2,3,4,5,6,7,8,9,10,11,12 as a ...

Sulphidisation of oxides and oxidised sulphides and

Metal oxides4.1.1. Copper oxides. Malachite, an abundant copper oxide mineral with the chemical formula, CuCO 3 ·Cu(OH) 2, is the most important source of copper in the oxide category. Similar to other oxides, it suffers from high metal ions dissolution and high surface hydration and thus needs to be sulphidised prior to its …

The recovery of oxide copper minerals from a …

The preferred method for the flotation of oxide and mixed copper ores is sulphidisation. The reagents are typically sodium sulphide (Na 2 S) and sodium …

Properties of interfaces between copper and copper sulphide/oxide …

@article{osti_1780977, title = {Properties of interfaces between copper and copper sulphide/oxide films}, author = {Halldin Stenlid, Joakim and Campos dos Santos, Egon and Johansson, Adam Johannes and Pettersson, Lars G.M.}, abstractNote = {We compare different means of predicting and rationalizing properties of corrosion films …

High Temperature Corrosion | SpringerLink

For example, in copper oxide (Cu 2 O) the number of Cu + ions is not exactly twice the number of O 2 ... The sulphidation rate is the result of the following processes: Sulphur supply. Metal cations transport inside the scale. Electrons transport inside the scale.

A comprehensive review on the recovery of copper …

Generally, copper ores are the primary sources of copper, and they exist in two forms, oxides or sulphides. The copper oxide ores, such as cuprite (Cu 2 O), …

Transformation of CuO and Cu2O particles into CuxS within …

The synthesis of HIXs with Cu x S proceeded in 3 steps: ion exchange (Step A), precipitation of copper oxides (Step B), and sulphidation (Step C). ... Both copper oxides were effectively transformed into copper sulphides, however, conversion of Cu 2 O was more efficient and selective. The presence of the high load of Cu(II) from the CuO ...

Filo del Sol copper-gold-silver advanced exploration

Filo del Sol is a high-sulphidation epithermal deposit associated with a large porphyry copper-gold system into which Filo Mining has drilled more than 60,000m. The "Filo" in the project's name refers to the sharp mountain ridgeline where it is located, which also serves as the frontier between Chile and Argentina. Although an estimated …

Epithermal Gold for Explorationists

Transitions to adularia-sericite gold deposits are recognised in the association of gold with Mn oxide in weathered quartz veins at Misima and Karangahake. ... Sillitoe, R.H. 1999, Styles of High-Sulphidation Gold, …

Nanoparticle sulfidation transformations – …

A study by Gregory Lowry and colleagues from Carnegie Mellon University suggests that Copper Oxide (CuO) nanoparticles (NPs) are sulfidized in the …

Sulphidisation of oxides and oxidised sulphides and …

Sulphidisation, an electrochemical process for conversion of a non-sulphide, oxide or oxidised sulphide, to a sulphide surface that facilitates efficient adsorption of …

Controlled-potential sulphidization and rougher-cleaner

Previous results have shown how con- trolled-potential sulphidization (CPS) can give improved metallurgy during rougher flo- tation of mixed oxide-sulphide copper ores._x000D_ Results in this paper, using different samples and different equipment, confirm the previous results and extend the application of CPS to cleaner flotation. By …

Synthesis of Zinc Oxide Nanoparticles by Citrus Limon as

A simple method using H2S gas was applied for the sulphidation process of the samples. The sulfidation process was successful under the influence of H2S gas, resulting in an increased distance ...

Selective sulfidation of metal compounds | Nature

Several simple process levers (gas partial pressure, gas flowrate and carbon addition) are demonstrated to selectively sulfidize a target metal from a mixed metal …

High Sulphidation Gold Deposits A Retrospective Summary

most profitable oxide portion of that gold deposit was not recognized until 196 9. ... The Nena high sulphidation copper-gold . system, Frieda River Complex, Papua New Guine a. Proceedings of the ...

EFFECT OF GRINDING CHEMISTRY ON THE …

The effect of pulp chemistry on oxidised copper sulphide minerals and copper oxide minerals were first studied separately before examining a mixed system. The work completed on the oxidised sulphide mineral revealed that grinding pulp chemistry affects the flotation performance of the ore for each oxidation degree tested. ...

Controlled Potential Sulphidisation (CPS) Flotation Process …

Controlled Potential Sulphidisation (CPS) Flotation Process. Conventional treatment of oxide and oxidised sulphide minerals by flotation involves the use of sodium sulphide for sulphidisation. Sodium sulphide is generally applied in a "slug" dosing fashion with manual regulation. However, it is recognised that "over addition" or "under addition ...

(PDF) Sulfidation of copper oxide nanoparticles and …

X-ray absorption spectroscopy, X-ray diffraction, and transmission electron microscopy indicate that CuO (tenorite) is sulfidized by inorganic sulfide to several copper sulfide (CuxSy)...

Computational analysis of the early stage of cuprous …

analysis of the early stage of cuprous oxide sulphidation: a top-down process, Corrosion Engineering, Science and Technology, 52:sup1, 50-53, DOI: 10.1080/1478422X.2017.1284393 ... and the copper ...

Flotation of mixed copper oxide and sulphide minerals

The copper sulphides present in the blend were bornite and chalcopyrite, while the oxides were malachite and minor azurite.From previous flotation investigations of mixed copper oxide and sulphide ...

Sulphidisation of oxides and oxidised sulphides and

The products of the mechanochemical reactions after the various oxides, copper oxide, lead. Summary. The paper seeks to provide insights into the sulphidisation of oxides and oxidised sulphides and the effect of redox environment on collector adsorption. Through the review of the topics covered in relation to the sulphidisation …

C3 Metals Inc

C3 Metals has identified multiple copper/gold skarn, porphyry and epithermal targets at Jasperoide. The Company has drilled the first skarn target – Montana de Cobre – and intersected high-grade copper in multiple holes, including 53.2m at 3.11% copper & 0.46 g/t gold, 118.7m at 1.15% copper & 0.37 g/t gold and 229.5m at 0.99% copper & 0.43 ...

Sulfidation of copper oxide nanoparticles and …

Many nanoparticles (NPs) are transformed in the environment, and the properties of the transformed materials must be determined to accurately assess their environmental risk. Sulfidation is expected to alter the …

Inhibition of copper sulphidation by boron …

It has previously been noted that the oxide growth rate on copper is diminished by boron implantation 1 but a mechanistic explanation of this observation has not been given. However, both the sulphidation and …

Sulfidation mechanism of ZnO roasted with pyrite

Han, J., Xiao, J., Qin, W., Chen, D. & Liu, W. Copper Recovery from Yulong Complex Copper Oxide Ore by Flotation and Magnetic Separation. ... Improvement for sulphidation roasting and its ...