copper sulfide objective

The solubility of copper sulfides under reducing conditions

Romberger and Barnes (1970) measured the solubility of covellite (CuS) in concentrated sulfide solutions in the pH range 3.5–13.5 and 20–200 °C and proposed the copper (II) species Cu (HS) 3− and CuS (HS) 33− to explain the room temperature solubility. Later, Snellgrove and Barnes (1974) claimed that on the basis of spectroscopic ...

4.1.6.2: The Extraction of Copper

In the copper(I) sulfide, the copper is +1 and the sulfur -2. The oxidation states of the elements oxygen (in the gas) and copper (in the metal) are 0. In sulfur dioxide, the oxygen has an oxidation state of -2 and the sulfur +4. That means that both the copper and the oxygen have been reduced (decrease in oxidation state).

Frank CRUNDWELL | Managing Director | PhD | Research …

It indicates how high-purity cobalt and copper are made from these deposits and suggests how the deposits will be exploited as mining moves down into the sulfide layer. The copper and cobalt ores ...

Electrolysis of copper (II) sulfate solution

Cathode reaction: Cu 2+ (aq) + 2e - → Cu (s) Anode reaction: 2H 2 O (l) → O 2 (g) + 4H + (aq) + 4e -. With carbon (graphite) electrodes, the oxygen usually reacts with the anode to form CO 2. If copper is used for the electrodes, the copper anode dissolves. The reaction is the reverse of the cathode reaction. The results of this experiment ...

Molecules | Free Full-Text | The Effect of Copper …

Electrochemical tests show that different copper sulfides exhibit pseudocapacitance properties when used as electrode materials for supercapacitors. In addition, the specific capacitance of copper sulfide …

Synthesis of ternary copper antimony sulfide via solventless …

Copper antimony sulfide (Cu-Sb-S) has recently been proposed as an attractive alternative photovoltaic material due to the earth-abundant and non-toxic nature of the elements, high absorption ...

Industrial Heap Bioleaching of Copper Sulfide Ore Started …

Sulfuric acid solution containing ferric iron is the extractant for industrial heap bioleaching of copper sulfides. To start a heap bioleaching plant, sulfuric acid is usually added to the irrigation solution to maintain adequate acidity (pH 1.0–2.0) for copper dissolution. An industrial practice of heap bioleaching of secondary copper sulfide ore …

Kinetics of copper leaching from direct-to-blister copper …

Coppermaking from sulfide concentrates entails two major steps: smelting and converting. In continuous direct-to-copper smelting process these two steps are combined into one. The principal advantages of this process are: isolation of SO2 emission to a single, continuous, SO2-rich gas stream, minimization of energy consumption and …

Extractive Metallurgy of Nickel, Cobalt and …

Flash Smelting of Nickel Sulfide Concentrates 18.1. Objective of the Process – Nickel Enrichment 18.2. Advantages and Disadvantages 18.3. Extent of Oxidation 18.4. Chemistry 18.5. Industrial Flash Smelting …

Arizona Sonoran Reports Final Extraction Rates from Phase 1 …

Phase 1: Indicative, interim results available at the end of November 2023, for first 15 small columns completed: Targeting an average life of asset copper extraction rate of 80% from the Cactus ...

Chemical Composition Data of the Main Stages of …

The flotation technique allows concentration of copper sulfide minerals by exploiting differences in their surface properties, by adding chemical reagents able to make copper sulfide minerals …

Sulfide Smelting | SpringerLink

Since 1974, copper-producing industries have been involved in developing continuous processes for production of copper and lead from sulfide ores in a single unit combining roasting/smelting and converting (and if possible refining also) with the prime objective of reducing the materials handling, energy consumption, capital and operating …

The recovery of oxide copper minerals from a complex copper …

The objective of this study was to investigate the floatability of a complex Kansanshi mixed copper ore comprising sulphide and oxide minerals with a view to achieving maximum copper recoveries and grades. The major focus of the study was on the use of two different methods of sulphidisation, viz. slug addition and controlled potential ...

Leaching of Copper Ores: Effects of Operating …

A maximum copper dissolution of about 87 % can be recovered at a leaching temperature of 45 oC, 462 m particle size, 0.2 N hydrochloric acid, 1.0 g/L solid to liquid ratio, and 1000 rpm stirring ...

Hydrometallurgical Processing of Low-Grade Sulfide Ore …

The authors describe the opportunities of low-grade sulfide ores and mine waste processing with heap and bacterial leaching methods. By the example of gold and silver ores, we analyzed specific issues and processing technologies for heap leaching intensification in severe climatic conditions. The paper presents perspectives for heap …

Leaching of Gold and Silver from a Complex Sulfide …

The main objective of this study is to examine the capacity of gold and silver leaching from a sulfide concentrate with copper-tartrate-thiosulfate solutions. Experimental parameters, including temperature, initial pulp pH, and copper, tartrate, and thiosulfate concentrations, were systemically studied.

Leaching of Primary Copper Sulfide Ore in …

Copper extraction from primary copper sulfide ore from a typical porphyry copper deposit from Antofagasta, Chile, was investigated after leaching with a chloride-ferrous media at two temperatures. The …

Comprehensive Electrochemical-Chemical Study of Copper …

One of the main objectives of this research was to determine the optimum conditions for copper removal from molybdenite concentrates without creating a passive layer that prevents copper dissolution. ... Mineralogical studies indicated that the presence of copper sulfide minerals such as chalcopyrite in molybdenum concentrate as …

Gas plant solves Hg problems with copper-sulfate absorbent

The objective of this step is to dispose of the moisture in the loaded copper-sulfide catalyst. The vendor states in the copper-sulfide certificate of analysis that the material contains an ...

Copper sulfide | Exhibition chemistry | RSC Education

The copper wire reacts readily with the hot sulfur gas (S 8, S 4 and S 2), forming a dark grey, brittle crystalline solid of copper sulfide. After ca five minutes of heating, carefully remove the hook and copper sulfide using tongs and allow any excess sulfur to burn, thus cleaning the copper sulfide. Allow to cool and re-weigh the copper ...

Sulphidisation of oxides and oxidised sulphides and

Copper sulphide minerals, hosted by the primary and secondary enrichment hydrothermal zones, yield the most copper production in the world. Chalcopyrite, a p-type semiconductor with a band energy gap of about 0.6 eV [ 40 ], is a primary copper sulphide and the most common naturally occurring mineral of the ternary Cu-Fe-S system and the …

1.8: Experiment 7

Group Worksheet. Before watching each video predict the outcome of the reaction (formation of gas (CO 2 or H 2) or precipitate, or no reaction). Then watch the video and on your worksheet write down 1) your observations, …

High-purity copper recycled from smelter dust by sulfation …

Results show that copper can be selectively recovered as 99.9% of pure copper. ... The objective of the simulation was to determine the theoretical conditions to convert the Cu content to the water-soluble ... Li L (2015) Recovery of copper from copper sulfide concentrate by sulfation roasting. Inter J Nonferrous Met 4:9–13. https://doi ...

| TSX:ASCU | Press Release | Arizona Sonoran Copper …

Copper extractions from the secondary sulfide dominant ore types at elevated temperatures are very high, ranging from 86% to 98%. These ores contain very little reactive gangue, consequently most of the ore types are net acid generators. Please refer to press release dated June 5, 2023 for Sample Location and Preparation.

17.4: Solubility of Salts

Solubility and Common ion Effect. In section 17.1.3 solubility was introduced as an example of the common ion effect, and this problem was explained using ICE table and Le Chatelier's Principle.. What is the solubility of Calcium phosphate in a 0.100M sodium phosphate solution? This is the same problem as above except that there is a common …

2.7: Nomenclature of Ionic, Covalent, and Acid Compounds

learning objectives . Recognize ionic compound, molecular compounds, and acids. Give the names and formulas for ionic compounds; ... CuS copper (II) sulfide . 51)HNO 3 nitric acid . 52)H 2 S hydrosulfuric acid . 53)H 3 PO 4 phosphoric acid . 54) HBrO 3 bromic acid . …

Sulfidation of copper oxide nanoparticles and …

Controlled syntheses of copper sulfides have shown that sulfidation occurs a Kirkendall mechanism: formation of nano CuS hollow structures (Kirkendall diffusion) by reacting Cu reported a mechanism of reduction …

Copper Mining and Processing: Processing Copper Ores

Copper processing is a complicated process that begins with mining of the ore (less than 1% copper) and ends with sheets of 99.99% pure copper called cathodes, which will ultimately be made into products for everyday use.The most common types of ore, copper oxide and copper sulfide, undergo two different processes, hydrometallurgy and …

Direct Process for Wire Production from Sulfide …

The project objective is to evaluate, construct, and demonstrate the performance of a novel molten sulfide electrolysis (MSE) process to directly convert copper sulfide concentrate to copper wire using only electricity. The proposed innovation uses a direct MSE process to make liquid copper of high purity and is coupled with a novel

The Extraction of Copper

In the copper(I) sulfide, the copper is +1 and the sulfur -2. The oxidation states of the elements oxygen (in the gas) and copper (in the metal) are 0. In sulfur dioxide, the oxygen has an oxidation state of -2 and the sulfur +4. That means that both the copper and the oxygen have been reduced (decrease in oxidation state).