آخرین محصولات
(PDF) COPPER ISASMELT
The smelter features a single Isasmelt furnace for smelting, one 6-in-line electric furnace for matte-settling and slag-cleaning duties, four Peirce-Smith converters and two rotary anode furnaces.
Copper Smelting Slag Cleaning in an Electric Furnace by …
A series of copper slag cleaning experiments with different WCO dosages along with various temperatures and settling durations was systematically carried out in …
Reduction of copper smelting slag using waste cooking oil
Currently, waste cooking oil (WCO) as a renewable energy is not widely utilized. Copper slag cleaning in an electric furnace is a critical process for reducing the excessive magnetite (Fe3O4) present in the copper slag to decrease the slag viscosity, which can promote the sedimentation of …
Cleaning of a copper matte smelting slag from a water-jacket furnace …
DOI: 10.1016/j.jhazmat.2008.08.107 Corpus ID: 7652371; Cleaning of a copper matte smelting slag from a water-jacket furnace by direct reduction of heavy metals. @article{Maweja2009CleaningOA, title={Cleaning of a copper matte smelting slag from a water-jacket furnace by direct reduction of heavy metals.}, author={Kasonde …
Modelling of copper (I) oxide reduction in a …
Reduction of copper oxide is an important step of metal recovery and slag cleaning in copper production. This can be achieved by slag treatment with injected reducing agents.
Latest results of the slag cleaning reactor for copper …
The developed new concept of slag cleaning combines DC furnace technology with an extra magnetic field for vigorous slag stirring, enhancing mass transfer to the re-ductant …
Flash Smelting of Copper
Copper matte and slag melt are separated in the settler. The slag layer is 0.5 m thick, while the copper matte layer is 0.2–1 m thick. Copper matte and slag are discharged intermittently from the furnace. The slag, with a copper content of 1–2%, is cleaned, quenched with water, and then discarded. The copper matte is transferred by …
Cleaning of a copper matte smelting slag from a water-jacket furnace …
Cleaning experiments of a copper matte smelting slag from the water-jacket furnace was undertaken by direct reduction in a laboratory-scale electric furnace.The effects of coal-to-slag ratio, w, and the reduction time, t, were considered for two different coal/slag mixing procedures.In the first procedure, metallurgical coal was …
(PDF) The submerged arc furnace (SAF)
Advantages of rectangular vs. round slag cleaning furnace design: ... 69.46%Al2O3 and 4.75%Ni were put in electro-furnace slag to simulate Nickel electro-furnace smelting raw material in a Nickel ...
Apparent Viscosity Evolution of Copper Converter Slag …
Therefore, in the actual process of copper slag cleaning in an electric furnace, reduction is an effective method to reduce the slag apparent viscosity indirectly, and the reduction degree can be reasonably and simultaneously controlled. ... This work was supported by the National Natural Science Foundation of China (51974142 and …
Efficient Recovery of Copper and Cobalt from the Matte–Slag …
During ISA copper smelting process, ISASMELT furnace discharges a large amount of matte and slag mixture and the separation of them has an important influence on the recovery of valuable metals. This paper presented a reduction-sulfurization sedimentation process for recovering copper and cobalt from the matte–slag mixture of …
Magnetohydrodynamic Copper Slag Cleaning
The future challenge for copper smelters is to increase metal yield by reducing copper losses and valorizing the slag as a marketable by-product. This can be achieved through further slag cleaning in a conventional submerged arc furnace (SAF) where remaining metallic oxides are reduced, and metal droplets have more settling …
Electric Slag Cleaning Furnace
With 's Outotec Electric Slag Cleaning Furnace, the cleaning of smelting furnace slag is carried out using surface coke reduction in an electric furnace. The circular or rectangular electric furnace is operated in batches and equipped with three or more Söderberg electrodes.
LATEST RESULTS OF THE INTENSIVE SLAG CLEANING …
work, carried out for a Chilean copper producer. In 2010 the process principle will be demonstrated in an improved larger and ... Figure 2: Conventional AC-based slag cleaning furnace (example ...
Recovery of cobalt, nickel, and copper from slags, using DC-arc furnace
The experimental work on the slag-cleaning process began on the laboratory scale, and was extended to pilot scale on Mintek's DC transferred-arc furnaces (8). In addition to numerous 100 kVA (60 kW) supporting batch tests, five campaigns (of 50 to 100 hours each) have been carried out at the 200 kVA (150 kW) scale, and a campaign (treating ...
MECHANISM OF BUILDUP FORMATION IN AN …
The copper slag cleaning in an electric furnace is based on slag reduction and settling of copper matte inclusions. Copper recovery depends on the slag temperature, degree ... copper layer at the bottom. Thus, the aim of this work is to evaluate the mechanisms of buildup formation on the electric furnace hearth. MOLTEN 2009. Santiago, Chile 1213
Characterization and Recovery of Copper from Converter Copper Slag …
Converter copper slag can be viewed as an important secondary resource for valuable metals, considering its high commercial value. The current research investigates the recycling of copper by a combination of theoretical and experimental methods. Based on a modified Stokes equation, it was determined that copper droplets …
Minimization of Copper Losses in Copper Smelting Slag …
The ultimate objective of the current work was to evaluate the minimum level of soluble copper that can be achieved in electric furnace slag-cleaning operations …
Alternatives of Copper (I) Oxide Reduction in a Copper …
Reduction in a Copper Slag Cleaning Furnace Goran Vukovi´c, Anton Ishmurzin, Juergen Schmidl, Bojan Zivanovi´c, and Bernhard Handle Abstract As environmental, energy saving, and legislation considerations are becoming ever more important, there is evidently a demand for further improve-
A novel slag cleaning method to recover copper from molten copper …
To recover copper from copper slag, a novel slag cleaning method was proposed. The thermodynamics and binary phase diagram of FeO–SiO 2 were calculated first. Then, the effects of experimental parameters on the reduction of Fe 3 O 4, recovery of copper, and slag cleaning mechanism were investigated.The results showed that the …
Mitsubishi Process
Copper matte and slag continuously flow through a chute to the electric slag cleaning furnace for separation by precipitation; the copper matte, at a grade of around 70%, flows continuously through a chute into the converting furnace for converting; the cleaned slag contains 0.6–0.8% copper and is discharged continuously for water …
Copper Smelting Slag Cleaning in an Electric Furnace by …
The main components of fayalite-based copper slag are iron oxides (FeO and Fe3O4) and SiO2. Based on the slag compositions, the phase equilibrium of this ISASMELT copper slag during the smelting process …
Influence of slag composition on reduction control and …
Control of copper in the SCF slag within the 3 to 5% range has been a challenge, due to changes in size and quality of metallurgical coke, and slag chemistry. Table II shows the average composition of SCF slag from March 2009 to December 2010. Table I: Typical analysis of Slag Cleaning Furnace (SCF) slag, mass % Cu Fe SiO2 CaO MgO Co S …
Minimization of Copper Losses in Copper Smelting …
cal processes used for cleaning copper smelting slags have been steadily optimized. The electric furnace or rotary slag-cleaning furnace are now generally used to perform this task, giving a level of copper in dis-card slag typically in the range of 0.55 wt.% and 1.3 wt.%,with most plants reporting copper losses in
Schematic diagram of the slag cleaning electric furnace.
Combined with thermodynamic analysis, it was found that all the cracking products participated in the reaction of copper slag cleaning. This work offers a novel approach for the clean utilization ...
Minimization of Copper Losses in Copper Smelting Slag …
In an industrial slag-cleaning furnace, the tem-perature is typically held between 1200 C and ... For the experimental work, the sulfide/copper mixtures thereby prepared were then mixed with
The Phase Transition and Element Distribution of Copper Smelting Slag
Sulfidation treatment of copper smelting slag. In the sulfidation experiment, the particle size of the synthesized slag was controlled below 80 mesh (178 µm).The mixture of CaSO 4 and anthracite was pelletized at a pressure of 1.0 MPa in a Ø 4 mm pressing tool, and the weight of every pellet was roughly controlled to be 0.04 g. Then …
Comparison of environmental performance of modern copper …
This fraction is significant because it affects heavily on the copper recovery during the slag cleaning phase. Basically, the fraction of oxide copper is dependent on the amount of sulfur present, which was kept fixed at 0.9%. The higher the oxidation degree and thus the copper content in slag, the higher the oxidized copper content as a ...
Process of Copper Slag Reduction in an Electric Furnace and …
Key to implementing modifications aimed at improving the copper slag reduction process is a thorough understanding of its kinetics and thermodynamics. …
Slag Cleaning: The Chilean Copper Smelter Experience
The distribution of matte particles in each slag layer after cleaning was investigated in detail, which indicates that the copper content in the upper slag layer can be reduced to 0.56 wt pct via ...
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