Pressure leaching behaviors of copper-cobalt sulfide concentrate …
For the leaching process of copper-cobalt concentrate, the control steps can be divided into chemical reaction control, solid layer diffusion control and liquid layer diffusion control. Under pressure leaching, the stirring is strengthened by air bubbles, thus, the recovery percentage can not be controlled by the diffusion of the liquid ...
Recovery of Copper from Copper Sulfide Concentrate by
This research investigates the extraction of copper from copper-containing leaching residue, which includes 33.45% of copper, 14.14% of iron, 23.87% of sulfur and trace amounts of silver and other ...
Comprehensive Electrochemical-Chemical Study of Copper …
Molybdenite is the most important molybdenum concentrate, which is mainly recovered as a by-product from porphyry copper deposits. Due to the low efficiency of purification processes such as flotation in the reduction of copper content of molybdenum concentrate to a standard level (i.e., less than 0.5 wt.%), further purification by a hydrometallurgical method is …
(PDF) Reaction Sequences in Flash Smelting and
chemical reactions as well as general features of reaction. ... products of a non-classified copper concentrate treated. in a drop-tube furnace [33, 37] in oxygen-enriched air in.
Chapter 6 Copper Production Technology
Figure6-1 shows flow-sheets for pyrometallurgical' and hydrometallurgical2 copper production. Tables 6-1 and 6-2 provide capsule summaries of these processes. 1 PyrometaIIurgy IS the …
Simultaneous extraction of copper and iron from chalcopyrite concentrate
The effect of reaction temperature, in the range of 278 K to 293 K, on the dissolution of copper and iron from the copper concentrate in a slurry with a 10% solid-to-liquid ratio was studied at various leaching periods by using a chlorine gas flow rate of 0.2 lpm.
Copper Recovery from Chalcopyrite Concentrate by …
Copper concentrate produced from copper-molybdenum ore in Erdenet mining plant, Mongolia using flotation was used in this study. The most frequent size fraction of the concentrate is -38.1 to +25.4 μm with about 49% distribution. The chemical compositions and mineralogical constituents of the copper concentrate are presented in Table 1.
Chemical analysis of copper concentrate
Download Table | Chemical analysis of copper concentrate from publication: Thermoanalytical Studies on Copper—Iron Sulphides | The direct production of copper sulphate from copper ore is an ...
Radiometric Temperature Measurement of Copper …
A preliminary qualitative analysis of these reactions allows us to clarify several relevant aspects. Even though Reactions [] and [] are inverse, both are considered in the reaction model, because bornite is also produced by a solid-state reaction between Cu 2 S and FeS in the presence of gaseous sulfur, with chemical characteristics associated with bornite but with …
CFD modelling of copper flash smelting furnace …
of the concentrate blend, silica flux and dust are listed in the Table 2. 'Volumetric' reactions and 'Particle Surface' reactions were activated to account for the gas phase and gas–solid reactions, respectively. 'Finite Rate/Eddy Dissipation' option was used under the 'Turbulence-Chemistry Interaction' tab to account
(PDF) Copper Recovery from Chalcopyrite Concentrate by …
Int. J. Soc. Mater. Eng. Resour. 3.6 Chemical reactions and thermodynamic analysis The formation of copper and iron species through the roasting of chalcopyrite with KCl at temperature ranges between 500-600 ° C is discussed in this section. The chemical reactions, which might be happened in the CuFeS2-KCl-O2 roasting system, are summarized in ...
Comprehensive Electrochemical-Chemical Study of …
of copper suldes. Based on kinetic study results of shrinking core models, both chemical and diusion reactions controlled the copper leaching process with an obtained activation energy of 33.56 kJ/mol. For recovery of the leached copper, the precipitation process was done by the addition of Na 2 S at 45 °C, S/Cu = 1, and pH = 9.
Extraction of Copper: Detailed Process
The process of extraction of copper from its ores and preparing copper metal or chemical compounds for use in various goods is known as copper processing. ... such as alumina, limestone, pyrite, and silica, in order to …
(PDF) Optimal Control of the Dynamics of Physical and …
This paper presents the developed model of dynamics of the physicochemical processes of electromelting of copper concentrates, which was obtained taking into account …
Copper Recovery from Chalcopyrite Concentrate by …
In this study, a combined process consisting of salt roasting and acid leaching was conducted to recover copper per sulphide concentrate with 43.5% of chalcopyrite.
Copper Concentrate
Copper concentrates are typically processed via pyrometallurgy-hydrometallurgy consisting of smelting, converting, fire-refining and electro-refining (Fig. 4 and Table 6).
A Review of Recent Advances in Pyrometallurgical Process
Often this occurs from excessive stirring, chemical reactions that create gas and disperse the metal, decreases in metal solubility with the slag, and operational actions such as charging and tapping . ... The goal of a TC is to reduce the amount of copper concentrate lost from the smelting process, whether from slag or off gas.
Copper Production
In copper flash smelting, after the sulfide concentrate particles are ignited, the chemical kinetics of the chalcopyrite oxidation is very fast and the reaction is rate controlled by oxygen mass transfer to the particles, rendering the intrinsic kinetics of oxidation unimportant.
Selective leaching of penalty elements from copper concentrates: A
The chemical reactions which take place between sodium sulphide and these As- and Sb-bearing minerals are presented in Table 5. It can be seen that As and Sb are both converted to sodium thio-anions. ... Copper concentrate produced at BHP Billiton's Olympic Dam mine in South Australia is leached in dilute sulphuric acid without addition of ...
Dynamic modeling of copper flash smelting process at a
Through reaction (4), FeO forms a liquid solution with SiO 2 in the slag phase, while it is oxidized via reaction 5 to form magnetite which remains mostly in the slag phase. The slag phase is made up primarily of FeO, Fe 3 O 4, and SiO 2 with trace quantities of copper and is considered as waste in the copper smelting process. The matte phase (copper percent by …
From copper concentrate to Cu-based metal oxides for …
Our investigation reveals that impurities in the concentrate inhibit the re-oxidation of copper oxide, and their removal is essential to improve performance. Based on these …
Salt roasting of an off-grade copper concentrate
Its copper concentrate has significant quantities of zinc and lead. No suitable extraction technology has been devel- oped for the exploitation of these concentrates. ... a number of other chemical reactions involving oxidation, in-situ chlorine for- mation and in-situ direct chlorination can also take place sequentially and/or simultaneously ...
Copper Production
Today, the few remaining deposits of oxidized ores are treated by hydrometallurgical methods to win the copper. The copper ores are crushed, ground, and undergo concentration …
How copper is made
The resulting mixture, called a copper concentrate, contains about 25-35% copper along with various sulfides of copper and iron, plus smaller concentrations of gold, silver, and other materials. The remaining materials in the tank are called the gangue or tailings. ... The chemical reactions in the converter are similar to those in the flash ...
Distribution of Copper, Iron, and Sulfur in Copper …
The distribution of copper, iron, and sulfur during the oxidation of La Caridad copper concentrate particles under simulated flash smelting conditions was studied in a laboratory reactor. Six wet-sieved size fractions …
Phase Transformation of Impurity Elements and High
2.1 Materials. The raw materials (copper concentrate) used in this study come from a copper smelter in Yunnan, China. The chemical composition of copper concentrate for the furnace is shown in Table 1.It can be seen from the raw material composition that the contents of Cu, Fe, S and SiO 2 are high at 18.98%, 23.19%, 22.55% and 14.84%, respectively. The initial …
Evolution of Size and Chemical Composition of Copper Concentrate
An experimental study was conducted to elucidate the evolution of size and chemical composition of La Caridad copper concentrate particles during oxidation under simulated flash smelting conditions. Input variables tested included particle size and oxygen concentration in the process gas. The response variables included the size distributions, chemical composition, …
Quantitative Monitoring of Microbial Species during …
Following copper and iron dissolution from the copper concentrate over time confirmed that bacteria strongly catalyzed the bioleaching of the concentrate with a maximum copper dissolution of 94%. Metal bioleaching was enhanced by applying the 5-step adaptation protocol since the bacteria were adapted to the ore and the physico-chemical ...
Smelting Mechanism in the Reaction Shaft of a Commercial Copper …
It is found from Figs. 5 and 6 that, when falling in the shaft, sulfur content in the feed particle has been dropping while Fe 3 O 4 content increasing continually till the bath surface. It is easily seen that, in the shaft the processes of concentrate desulfurization and Fe 3 O 4 generation are all progressive without sudden change in oxidation reactions revealed by …
Copper matte
copper losses is the chemical dissolution of copper [8, 28], in which the sulfidic copper in matte is oxidized to slag as cuprous oxide through Reaction 8.