Yucel et al. (Citation 1992) investigated the treatment of ancient Kure copper slag using a carbothermal reduction method in a DC arc furnace operating at high temperature (1,430°C and 1,480°C), achieving maximum cobalt extraction of 95.7% and copper extraction of 90% in a closed system.
Secondary copper blast furnace slag was treated with carbon to derive the conditions for maximum recovery of copper with minimum simultaneous reduction of iron oxide. Experiments were carried out to study the effects of parameters such as temperature, carbon addition and CaO addition to the slag on the efficient recovery of copper. A two …
Materials. The smelting slag used in this study was obtained from a copper plant in China. Mineralogical analysis, performed using scanning electron microscope (SEM) and energy dispersive X-ray spectroscope (EDS), polarizing microscope and X-ray diffraction (XRD), indicated that fayalite (Fe 2 SiO 4) and magnetite (Fe 3 O 4) phases …
Copper slag is also a metallurgical solid waste produced during the copper smelting process; about 2–3 t of slag are produced for every ton of refined copper in China. 15,16,17 The contents of Fe and Cu in copper slags are considerable, approximately 30–45% and 0.5–3.0%, respectively, and thus recycling of valuable elements in copper …
Subsequently, the process is analyzed in the context of designing furnaces for slag treatment in the non-ferrous metals domain and determining operational parameters . The influence of individual parameters and employed additives on the achievable efficiency of the copper slag reduction process is also examined.
In the present work, the effects of amount of coke, reduction temperature, flux addition, and furnace types on copper slag smelting in a DC arc furnace were studied. The optimum coke amount was found to be 10% of the slag weight in an open-top furnace for a 1 h reduction time in the temperature between 1703 and 1753 K. Similar conditions in a …
Copper slag can be treated as a secondary resource since it usually contains a substantial amount of copper and other valuable metals. Characterization of the slags to determine the expected metal recovery is essential for the design of separation flow sheets. ... Sarrafi A., et al., Recovery of copper from reverberatory furnace slag by ...
The copper slag produced by the slag cleaning furnaces as a final by-product, yields copper in the range of 0.55–1.3 wt.% in the discarded slag, with copper …
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 ...
The electric furnace method, the vacuum depletion technology, and the electric field enrichment method are all physical ways to separate the copper in the copper slag; they have an effect on the metal droplets only but are not applicable to the copper oxide and copper sulfide in the copper slag.
As shown in Fig. 2, adding copper slag to concrete mixtures makes the concrete easier to work with. This improvement in workability is the result of copper slag's low water absorption characteristics. Download: Download high-res image (152KB) Download: Download full-size image; Fig. 4a. Slump value of different copper slag M 20 …
The authors further consider that under exceptionally well-controlled conditions, a copper content in electric furnace discard slag between 0.55 wt.% and 0.7 wt.% can be obtained, by minimizing …
Pyro-metallurgical copper slag (CS) waste was used as the source material for ultrasound (US) silica extraction under acidification processes with 26 kHz with HCl, HNO3, and H2SO4 at different ...
5. K. Maweja, T. Mukongo, I. Mutombo, Cleaning of a copper matte smelting slag from a water-jacket furnace by direct reduction of heavy metals. J. Hazard. Mater. 164(2–3), 856–862 (2009) 6. F. Carranza, R. Romero, A. Mazuelos, N. Iglesias, O. Forcat, Biorecovery of copper from The Recovery of Copper from Smelting Slag by Flotation …
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 ...
Global copper slag (CS) emissions reached 57.2 million tons in 2021. Despite the increasing reuse of CS, the treatment of CS is still dominated by landfill so far, which not only occupies land ...
The initial copper matte and slag were mixed with different chemicals to obtain the required compositions. FeS was added to prepare low-grade copper matte, SiO 2 was added to decrease the Fe/SiO 2 ratio of the slag, and the CaO from CaCO 3 was used to control its concentrations in the slag. Pure FeS, SiO 2, and CaCO 3 were …
The cleaning of copper slag is an important way to realize the sustainable development of the copper metallurgy industry. CaO is a commonly used additive in the process of slag type regulation and has an important impact on the physicochemical properties of copper slag. However, there are few studies on the mechanism of the …
In the smelting sector we excavated the stone foundations and a slag cake that conform to the dimensions of a hand-powered bellows-driven furnace in which the …
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 ...
Copper slag is a by-product obtained during smelting and refining of copper. Copper smelting slag typically contains about 1 wt.% copper and 40 wt.% iron depending upon the initial ore quality and the furnace type. Main components of copper slag are iron oxide and silica. These exist in copper slag mainly in the form of fayalite (2FeO ·SiO 2).
of copper from the slag. Experimental Materials. Industrial copper blast furnace slag was used in this study. Slag sampIes received from the furnace were crushed to less than 3 mm, and 100-g slag sampIes were prepared by means of mechanical splitting. Carbon in the form of graphite powder (-200 mesh, 74 fim) containing greater than 99% fixed
In this study, the slag crust from a copper stave blast furnace was sampled, and the phase composition and structure of the slag crust were characterized in detail through XRD analysis and SEM-EDS ...
2.2. Experimental method and analytical techniques2.2.1. Settling behavior of matte in copper slag. To study the settling behavior of matte in copper slag, 60 g of copper slag were placed in an alumina crucible and kept in a protective atmosphere of 99.5% N 2 throughout the experimental process. The temperature was raised to the …
In copper anode furnaces, the installed refractory lining is exposed to chemical attack caused by slag and copper oxide. This results in infiltration of the brick microstructure and corrosion of the bricks' inherent components. Increased temperature level changes the temperature and partial pressure during the furnace operation, as …
3.1 Phase Diagram Analysis of the Slag. FeO, SiO 2, and Fe 3 O 4 are the main phases of the copper slag based on the chemical analysis. The FeO-SiO 2-Fe 3 O 4 ternary phase diagram was selected to analyze the position of the slag component in the phase region, as shown in Fig. 3a. Based on the 10 sets of data provided by the bottom …
Prediction of the thermal duties of copper coolers in freeze lined furnaces is challenging. Where copper coolers are immersed in liquid slag the heat transfer is often defined by a natural ...
Conclusions The archaeometallurgical investigation of fayalitic tap slags from Itziparátzico in West Mexico has identified the first recorded …
The reverberatory slag is produced from the reverberatory smelting furnace and usually produces the slag that is more dilute in copper of about 0.6% and is discarded without slag recovery treatment (Davenport et al., 2002). The smelter slag is produced from the smelting furnaces and contains copper with average of 1.2%.
In the extraction of copper, the slag formed in the blast furnace is: View Solution. Q2. The slag formed in the extraction of iron from haematite in the blast furnace is: View Solution. Q3. Copper is extracted from the ore copper pyrite by smelting in a blast furnace. The flux used and the slag formed are :
As previously noted, the tested copper slag is mainly processed in an electric furnace with three electrodes. The metallic alloy that is the product of this reduction process occurs as a fine-grained suspension. ... An optimization of the technology of flash smelting furnace slag by using a dedicated reducing agent may give a considerable ...
Copper slag contains a large number of iron elements [1,2,3].By deep reduction and adding tempering agent, not only valuable iron can be extracted from the slag, but also gangue can be fully utilized in the production of mineral wool, glass-ceramics, stone, and so on [4,5,6].However, copper slag contains a lot of Cu, S, and other …
Selenium is a value added by-product of copper process. The lower recovery of selenium from the copper process is attributed to the high loss of selenium in the discarded slag. Knowledge of selenium behavior in slag is very important in the control of the selenium...