Download Citation | Iron Recovery from Copper Slag Through Oxidation-Reduction Magnetic Concentration at Intermediate Temperature | Large amounts of copper slag containing about 40 wt% iron is ...
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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 …
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CaO-Al2O3-based refining slag, as a low-cost and low-carbon alternative to lime, has been used as a modifier in the smelting reduction of copper slag. The influence of refining slag/copper slag mass ratio (RS/CS) on the reduction behavior, metal recovery, and slag–refractory interaction was studied through experimental and thermodynamic methods. …
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A novel technology, modified roasting in CO–CO2 mixed gas and magnetic separation, was presented to recover iron from copper slag. The effects of various parameters such as dosage of flux (CaO ...
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QIU T S, ZHOU L P, LI G D. Experimental study on copper and iron recovery by direct reduction roasting-magnetic separation of copper smelting slag[J]. Metal Mining, …
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A novel process to upgrade the copper slag by direct reduction-magnetic separation with the addition of Na2CO3 and CaO. Powder Technol. (2019) ... Economic potential and environmental impact of metal recovery from copper slag flotation tailings. Resources Policy, Volume 80, 2023, Article 103232. Aleyna Gümüşsoy, …, Elif Uzun Kart. Show 3 ...
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Zhou H, Liu G, Zhou C, et al. Quantitative characterization and magnetic separation of copper pyrometallurgical tailing for molybdenum and copper pre-concentration and cleaning of environmentally hazardous elements. ... Yang HF, Jing LL, Dang CG. Iron recovery from copper-slag with lignitie-based direct reduction followed by magnetic separation ...
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Moreover, studies have proposed various methods for iron recovery from copper slag. For instance, proposed the recovery of value metals from copper slag through ammonium chloride treatment, addressing the challenge of extracting iron from the slag using traditional processes (Zhou et al., 2015).
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The separation, extraction, and integrated recovery of valuable metals from lead slag are more efficient. Kim et al. [19] proposed two routes for the selective recovery of lead, copper, nickel, and zinc from lead slag under optimum conditions. The leaching rates of lead, copper, zinc, and nickel were 92%, 60%, 70%, and 66%, respectively ...
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When the iron and copper grades in the magnetic concentrate were 90.21% Fe and 0.4% Cu, 91.34% iron and 83.41% copper were recovered, respectively. ... In this article, to improve the recovery of ...
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The significant volume of copper smelting slags poses environmental challenges, particularly concerning soil and surface water contamination. However, these slags contain valuable elements such as …
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Li Tao et al. [1] studied the recycle of iron via direct magnetic separation of copper slag, which recovery ratio is just only 32.96% and hard to meet the requirement of high …
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The results show that under the proper conditions, the copper grade of rougher copper concentrate was increased from 6.43% to 11.04%, iron recovery of magnetic separation was increased ...
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BCL slag contains both copper and iron which are of interest and subsequently copper as mentioned can be recovered using flotation and iron be recovered using magnetic separation [9]. talks about past work on recovery of iron from copper slag using direct reduction – magnetic separation which yielded iron concentrate of 90.68% assay. The BCL ...
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Request PDF | On Feb 1, 2025, Jianjun Sun and others published Eco-friendly recovery of copper from copper slag via magnetic separation followed by flotation: Experimental and mechanistic insights ...
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The goal of oxidation is to recover the magnetic metals. When copper slag is fully oxidized in air at 1450 °C, the grain size of the magnetite phase can be controlled at a cooling rate of 5 °C/min. ... Valuable metal recovery from copper slag is an entropy reduction process that requires large amounts of energy. Currently, metals such as Fe ...
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Aiming at recovering iron from high-iron-content copper slag, this article introduced a combination technology of deep reduction and magnetic beneficiation, investigated the iron recovery efficiency and optimized the technical conditions. When coke powder with 86wt% fixed carbon was used as a reductant, iron was successfully extracted from the copper slag. Under …
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The copper smelting industry generates copper slag as its primary solid waste (Tian et al., 2021).The pyrometallurgical process extracts approximately 80% of the copper (Zuo et al., 2022), producing 2–3 tons of copper slag for every 1 ton of copper (Qu et al., 2023).According to statistics, global copper slag emissions in 2022 alone reached 35.2 million …
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Therefore, concentrated solar power (CSP) could be used in the treatment of copper slag to transform fayalite into magnetite and copper sulfides and oxides into copper …
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Reclamation of copper from copper smelting slag has long been the strategy to improve the recovery ratio for copper smelters; however, it is hindered by the precipitated Fe 3 O 4 particles in the molten slag. 5,6 Firstly, the entrained copper in the slag is high, up to 0.6–1.4%, greatly exceeding the mining grade of copper ore (0.4–0.8%). 7 ...
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Utilized an innovative sulfide roasting-flotation-magnetic separation technology to recover Cu, Ni, Zn, and Fe from electroplating sludge, achieving a copper recovery rate of 83.73%. ... plasma arc or blast furnace smelting, slag formation, sintering, melting, and high-temperature gas-phase reactions (Hsu et al., 2019). In the processing of ...
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Iron grain growth during deep reduction roasting is important for iron enrichment from copper slag (CS) through magnetic separation. In this work, a novel method of additive-free activation roasting, including oxidation and subsequent reduction roasting, was proposed to increase the iron grain size, then the iron was extracted by magnetic separation.
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The smelting process can be divided into three stages, namely decomposition of high-valence sulphide, oxidation of sulphide, and matte smelting and slagging reaction (Fig. 1).The efficiency of matte smelting and matte-slag separation, as well as the extent of copper losses to slag are mainly affected by the oxidation/reduction potential, matte grade, smelting …
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The calculation method for the copper recovery rate is illustrated as Cu Cu Cu Cu Mα mβ Mα η âˆ' = × (1) where αCu and βCu are copper contents in the slag before and after depletion, respectively, wt.%; m and M are the masses of copper slag before and after depletion, respectively, g; ηCu is the copper recovery ...
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BCL slag contains both copper and iron which are of interest and subsequently copper as mentioned can be recovered using flotation and iron be recovered using magnetic separation . talks about past work on recovery of iron from copper slag using direct reduction – magnetic separation which yielded iron concentrate of 90.68% assay. The BCL ...
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In this study, iron resources were extracted from copper smelting slag using chlorine roasting and magnetic separation techniques for the first time. The results showed that hydrogen could reduce the ferrous chloride on the surface of the pellet to environmentally friendly iron, followed by the complete reduction of the ferrous chloride inside ...
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By using DR followed by a magnetic separation process for iron recovery from copper slag, Yang [10] obtained iron powder of 92.05% iron content with an iron recovery rate of 81.01%, and Wang [11 ...
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Copper slag is a byproduct of the pyrometallurgical production of copper, with an estimated 2.2–3 tons of slag generated per ton of copper produced [1], [2].Global copper production generates approximately 30 million tons of slag annually [3].Disposing of large quantities of end-of-life copper slag presents significant waste management challenges since it …
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Copper is extensively utilized across various fields due to its exceptional performance (Guo et al., 2018a, Guo et al., 2018b).Globally, nearly 80% of copper is produced utilizing pyrometallurgical methods (Potysz et al., 2015).However, every ton of refined copper produces 2–3 tons of copper slag (Tian et al., 2021).Annually, over 30 million tons of copper …
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The Fe3O4 and Fe2SiO4 in copper slag were successfully reduced to metallic iron by coal-based direct reduction. Under the best reduction conditions of 1300 °C reduction temperature, 30 min ...
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Therefore, the present work shows the experimental results of the reduction of a Flash Smelting slag by using coke as reductant up to 150% of the stoichiometric carbon required to reduce …
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A novel process is proposed in this paper for a green and efficient utilization of copper slag. The basic premise involved the addition of different amounts of Na 2 O into molten copper slag and evaluation of the effects on the magnetic fraction and the properties of ceramics generated from the non-magnetic residue, and mechanisms of the effects were further studied …
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The effective recovery of metals from copper slag not only minimizes resource waste but also holds significant importance for fostering green and sustainable practices in the copper smelting slag industry. ... was up to 99.72 %, 75.31 % and 80.32 % respectively. Hence, this method of salt roasting-magnetization roasting-magnetic separation ...
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