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 the discard slag in the range of 0.8–1.0 wt.%.
In the quest to achieve the highest metal recovery during the smelting of copper concentrates, this study has evaluated the minimum level of soluble copper in iron-silicate slags. The experimental work was performed under slag-cleaning conditions for different levels of Fe in the matte and for a range of Fe/SiO2 ratios in the slag. All …
Conclusions The archaeometallurgical investigation of fayalitic tap slags from Itziparátzico in West Mexico has identified the first recorded …
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...
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 …
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 …
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 ...
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 :
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 …
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 …
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 …
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 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%.
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 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 …
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 ...
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 …
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 …
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 ...
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 ...
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.
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.
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.
bottom blown furnace slag have been investigated with the aim of minimizing the copper loss in discarded slag. The industrial copper smelting slags from Fangyuan were used to …
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 …
1.2. Objectives. The objective of this present study is to characterize the BCL copper slag and analyze its composition properties. In the past, research has been focused on ferrous and non-ferrous slags with the intention of employing the findings in various applications [].We had to carry out the characterization task first in order to quantify the …
The application and continuous improvement of the copper slag reduction process in the electric furnace stem from increasingly strict legal restrictions on slag …
Such conditions include operating the electric furnace at metallic copper saturation, maintaining the %Fe in the electric furnace matte between 6 wt.% and 9 wt.%, not exceeding a slag temperature ...
The copper slag comes from a Mexican industry that uses the pyrometallurgical processing of sulfide minerals containing about 15% or less copper. The CS used as a photocatalyst was ground and sieved to 400 mesh without further purification or treatment. Copper slag characterization. CS was characterized by a variety of …