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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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The metallurgical industry produces a large amount of solid waste [1].It is estimated that for every ton of copper produced, more than 2.2–3 tons of copper slag are produced [2].In the aluminum electrolysis and recovery process, about 30∼50 kg and 100–150 kg of SAD are respectively discharged per ton of aluminum [3].According to the World Bureau of Metal …
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Several studies have already demonstrated that using industrial waste such as fly ash, rice husk ash, bagasse ash, silica fume, blast furnace slag, copper slag, waste glass and waste marble, etc., were considered to be advantageous. Similar copper slags are also valuable options to be used as concrete ingredients.
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The portfolio includes mainly shaft furnaces and shaft hearth furnaces for melting of spend anodes, copper cathodes and different copper qualities as well as drum-type furnaces as anode furnace for the refining of blister or raw copper and …
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Concentrate smelting in the Teniente Con-verter produces high-grade matte (72-74% Cu) and fayalite-base slag containing 12 to 20% of magnetite (Fe3O4) and 4 to 10% of copper. The produced copper matte in electric furnace contains from 68 to 70% Cu.
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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 ...
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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.
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extensively investigated. The electric furnace or rotary slag-cleaning furnace are now generally used to perform this task, giving a level of copper in discard slag typically in the range of 0.6 - 1.3 wt%, with most plants reporting copper losses in the discard slag in the range of 0.8 - 1.0 wt% [1-3]. The latter process has the advantage of ...
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Blister Tap-Hole Refractory Insert Life. Unlike slag or copper matte, blister cannot be tapped through a water-cooled copper element. Contact of molten blister with a water-cooled copper element typically results in a rapid dissolution of the copper element, which eventually may cause a steam explosion or furnace leak with serious consequences [].A proven practice for …
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A process is provided for recovering in a slag cleaning furnace the copper from smelting furnace slags discharged from a smelting furnace for copper refinery, said process being characterized in that zinc removed tailings are charged into said slag smelting furnace in an either continuous or discontinuous manner, whereby the copper recovery may be improved and valuable metals …
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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-
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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
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The hazardous components of copper slag are released into the ambient environment (Li et al., 2021a, Li et al., 2021b, Zolotova et al., 2021), resulting in environmental pollution and unsustainable developmental issues. Copper slag contains 29–45 % Fe, 25–40 % SiO 2, 5–11 % CaO, 3–7 % Al 2 O 3, and other nonferrous
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Pyrometallurgical production of molten copper generates two slags, smelting and converting. Smelting furnace slag typically contains 1%–2% Cu.
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nically entrained matte inclusions and dissolved copper. Copper recovery from the slag requires magnetite reduction to liberate matte inclusions and create conditions for co-reduction of dissolved cuprous oxide. Efficiency of copper recovery from the slag in an electric furnace depends on number of factors, such as slag composition and properties,
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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.%.
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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 entrained matte and …
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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 effects of experimental parameters on the reduction of Fe 3 O 4, recovery of copper, and slag cleaning mechanism were investigated.The results showed that the addition of SiO 2 …
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Anode furnace slags contain significant amounts of valuable elements such as copper, nickel, tin, lead and zinc. To avoid losses during processing, the slag is typically recycled to upstream ...
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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 ...
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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 ...
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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 al., 2019).At present, the most …
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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%.
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The strength of the copper slag mortar was generally lower than that of the control mortar and the amount of ground copper slag to replace cement for optimum strength was about 5%. View Show abstract
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The variety of slag compositions of Table 1, is inherent to both the concentrate composition and the extraction method applied.Each slag composition requires an appropriate treatment method for further metal recovery or for utilization as construction material [27,28].Thermal reduction of copper smelter slags with solid carbon is commonly applied in …
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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...
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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 ...
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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 ...
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copper oxide from the copper blast furnace slag at 5% carbon addition as a function of time at three temperatures of this study. At any given temperature, the amount of copper present in the slag falls rapidly and reaches a steady state value. As temperature increases, the rate of reduction of copper oxide from slag also increases.
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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 ...
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