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 …
Copper slag is an acid slag mainly composed of Fe 2 SiO 4 and CaFeSi 2 O 6, which is classified as solid waste in the copper smelting industry (Li et al., 2019). In China, 2.2–3.0 tons of copper slag were produced per ton of refined copper, and tens of millions of tons of copper slag were released into the environment every year (Zhou et …
The utilization of solid waste is the challenge for the civil and environmental engineers to utilize the waste from different industry to excel the sustainable development, and in the same time, it is matching with the cost concern of the present materials. Copper slag is a by-product obtained during smelting and refining of copper. The waste copper …
The feasibility of preparing zinc ferrite from high-zinc electric arc furnace (EAF) dust and high-iron copper slag (CS) based on direct microwave roasting of the wastes together was assessed in this study, with a focus on the effect of microwave roasting temperature. According to the permittivity and permeability measurements of …
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 …
The application and continuous improvement of the copper slag reduction process in the electric furnace stem from increasingly strict legal restrictions on slag utilization and the financial losses associated with metal loss in the oxidic phase.
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 safe and efficient treatment of copper slag (CS) is an important aspect of the circular economy and green development. In order to reduce the negative …
However, recovery of copper was about 4 percent lower for the high copper slag (sample C) and 23 percent lower for the low copper slag (sample A). Flotation tailings from the quenched slags ranged from 0.53 to 0.66 percent; slow-cooled slags gave tailings containing from only 0.26 to 0.39 percent copper with lowest analyses for 30-minute …
The fine-grained copper slag finds its applications in pavements, while the granulated one improves the stability of the asphalt mixtures. 3.1.3. Concrete. The pozzolanic activity of copper slag has been reported to be similar to that of fly ash [65]. The blended mixture of copper slag and cement exhibited similar properties to that of a ...
The purpose of this paper is to find differences in the performance of tuyeres and capillary plugs when they are used with high sulphur fuel oil (HSFO), natural gas, and hydrogen …
The use of an electric arc furnace for recovery of metal values from slag generated in a secondary copper smelter has been successfully demonstrated and commercialized. Blast furnace slag containing about 1.5% Cu, 1.0% Pb, 3.5% Zn, 1.0% Ni, 40% FeO and 1.0 opt Ag was retreated to recover better than 75% of the metal values. …
Copper slag is a residue from the copper smelting process that not only takes up large amounts of space, but also contains harmful elements that can cause environmental pollution. In this paper, zinc in copper slag is sulfide-roasted using pyrite as a vulcanizing agent and anthracite and K2CO3 as additives, thus leaving zinc in the slag …
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 …
This study explored the influence of using copper slag as an alternative sand for producing cement mortar bricks and its effect on γ-ray attenuation property, strength, and consistency of...
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 ...
Copper in the BBF slag is mainly entrained matte droplets due to the high apparent viscosity of the slag caused by lower temperature and solid phase present. Copper in the FSF slag is mainly dissolved copper in the liquid slag due to a higher temperature and Fe/SiO 2 ratio.
Copper slag and stainless steel slag of Electric Arc Furnace (EAF) are two typical metallurgical solid wastes, which contain a large number of valuables, such as Fe, Cr, and Cu. The transition metal elements in the waste slags, such as Cr and Fe, can be recycled as the coloring ions in the black ceramic tile. ...
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 …
Matte and slag phases increase the deterioration in the slag line [10]. These drawbacks make the copper industry acquire such quantities of refractory materials for the total or partial ...
Therefore, it is of great importance to recover copper from copper smelting slag. Slag cleaning processing can be divided into two types. The first is pyrometallurgical …
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.
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.
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 ...
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 …
Copper slag is a waste during pyrometallurgical production of copper from copper sulfide concentrates. Generally, 2.0–3.0 tons of copper slag are generated per ton of copper production, depending on the properties of raw materials and operating conditions [1,2,3,4].It is estimated that approximately 12 million tons of copper slag is …
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 …
The Okiep Copper District is located 600 km north of Cape Town in the north-western part of the Northern Cape Province, South Africa and includes the towns of Springbok, Okiep, Nababeep and Concordia.It is the oldest mining district in the country and has been a copper producer for more than 150 years.Copper smelters have been in …
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.%.
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 …
During the pyrometallurgical extraction of copper, a significant source of copper loss is discarded slag. In 2021, the global smelter production of copper reached 21.4 million tons [], and the slag produced was approximately 2.2 tons per ton of copper [].The most considerable amounts of slag come from the smelting furnace and often …
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.
