No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
The current study investigates the incorporation of copper slag (CS) and stainless steel slag resulting from electric arc furnace operations (EAFSS) as partial replacements for …
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 blowing smelting, …
Copper slag waste is considered a potential world resource owing to the huge amounts being produced annually worldwide which contain significant amounts of valuable metals (Phiri et al., 2021). The global copper slag production is estimated at 752 million tons for the period between 1999 and 2019 from the 13 main producing countries (Fig. 2).
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 …
Entrained copper can be recovered via pyrometallurgical slag cleaning in a settling furnace, where the slag viscosity and copper droplet size distribution (CDSD) are critical …
Nearly 2.2 to 3.0 tons of copper slag are generated for every one-tone production of copper, leading to the generation of 4.5 million tons of copper slag very year; as of now, a total of 50 ...
High-efficiency reduction of Fe3O4 particles in molten copper slag is the key for recovering slag-entrained copper, although restrained by the sluggish reaction kinetics of commercial powdery reductants with low density. Here, a new strategy by density tuning in conjunction with pelletizing of the powdery reductants is suggested, greatly enhancing the …
to the process of copper slag cleaning and provide a new approach to WCO utilization. II. EXPERIMENTAL A. Materials 1. ISASMELT copper slag A representative ISASMELT copper slag sample was obtained from Copper Inc. in China. A mixture of matte and slag tapped from the ISASMELT furnace is a periodic operation. The mixture mainly consists of
Moreover, the flotation kinetic model of copper slag was established and the results showed that the movement of copper slag in the flotation process conforms to the first-order kinetics. The addition of sodium carbonate increased the stability of the pulp and improved the flotation kinetics greatly, resulting in a better flotation performance.
Large amounts of slag are generated during pyrometallurgical processing in copper production. Due to the presence of valuable elements, the improper disposal of huge quantities of copper slag produced, results in significant loss of resources as well as environmental issues. Analyses of the copper slag show that it contains valuable metals, particularly copper and …
Copper slags have been used as abrasives (polishing and cleaning) for metallic structures [30,31] and mainly in the building industry: concrete manufactured with copper slag [32]; copper slags as ...
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 closed-top furnace resulted …
Oxygen partial pressure is a defining thermodynamic variable in the recovery of copper during matte conversion. This study combines theoretical analysis and experiments to investigate the effect of oxygen partial pressure on slag properties and copper separation from slag. Additionally, under high oxygen partial pressure, the mechanism of CaO regulation of …
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 …
The trial brick specimens using 100 wt% copper slag replacement for sand not only satisfied all requirements of cement brick in the Korean standard (KS) F 4004, but also the TCLP regulation ...
Ausmelt furnace slag contains about 0.9% Cu (mass %). With increasing the amount of Ausmelt furnace slag, the recovery of copper from it will produce an enormous economic yield. The recovery of copper by floatation from slow cooled Ausmelt furnace slag was studied in...
A novel co-modification method between BOF slag and copper slag is proposed for the effective recovery of valuable metals in the metallurgical slags. The co-modification reactions between the Ca-containing phases in BOF slag and fayalite in copper slag are discussed on the basis of thermodynamic analysis, and the co-modification effect on the phase reconstruction …
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 ...
A study of copper slag smelting indicates that there is value in characterizing copper slag with view of recovery of viable metals, especially iron. Analysis from the results …
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 a ladle ...
Reduction. The reduction process for copper slag is typically followed by magnetic separation [].Depending on the temperature and intensity of reduction, it can be classified as direct reduction, deep reduction, and smelting reduction []monly used reducing agents include coke, biomass carbon, and natural gas [31, 32].The reduction process converts ferrous …
The copper smelting process produces plenty of copper slag every year, which is a hazardous solid waste, but a secondary resource. In the present study, the extraction of copper, nickel, and cobalt from copper slag was investigated through the process of sulfation roasting–water leaching and the process of sulfation roasting–sulfate decomposition …
Electric slag cleaning furnace, Electrode seal, NovaLance™, SlagFlo™, Top submerged lance furnace ... The lance is currently on site ready for testing on a primary copper smelting TSL furnace ...
Alternatives of Copper (I) Oxide 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-
The high temperature of copper slag derived from furnaces (>1300 °C) indicates the potential for reclaiming substantial energy. Integrating waste heat and metal recovery techniques makes it possible to address the issues above. However, most research on recovery lacks an economic analysis of their technologies. Due to its high Fe content ...
Immiscible glycerol solution and silicone oil systems in the cold model experiments were used to simulate the matte and slag systems in the copper smelting furnace. In different glycerol-silicone oil systems, air was fed by a syringe pump at different injection flow rates and glass nozzle sizes to control bubble size. The bubble size could be ...
Two slags from steel production in the electric arc furnace (Alcalá de Guadaira, Sevilla, Spain) were used: electric arc furnace slag (EAFS) (3–5 mm particle size) originated in the primary metallurgy or fusion and ladle furnace slag (LFS) (0–2 mm particle size) originated in the secondary metallurgy or refining of the molten bath produced ...
Slag is further cleaned in a slag cleaning furnace or directed to slag flotation. The SO 2 gas generated during the smelting stage is led to an acid plant to produce sulfuric acid ... Related to the slag copper content, based on the industrial experience and data, the distribution of copper to compounds in the slag phase was described as a ...
The efficiency of the magnesia-activated blast furnace slag for S/S of copper-contaminated soils is evaluated in the present study. The following findings are drawn from the testing: (1) Decrease in the maximum dry density and an increase in the optimum moisture content is observed with increasing percentages of GM. The decrease in MDD is ...
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 ...
