Leaching was carried out in 250–500 mL conical flasks containing 100 mL of an organic acid with varied concentrations (0.5–3.0 N) and 5–20 g of <45 µm copper converter slag. Experimental flasks were …
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The copper slag produced by the smelting industry contains valuable metals like Cu, Fe, Zn, Pb, Co, and Ni, along with harmful components like As, Hg, Bi, and Sb. However, over 80% of global copper slag is discarded without proper disposal, wasting valuable metals and harming the environment (Phiri et al., 2022). While some copper …
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Silicate slags produced from smelting copper concentrates contains valuables such as Cu and Fe as well as heavy metals such as Pb and As which are considered hazardous. In …
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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 resources but also causes damage to the environment. The application of CS to cement-based materials (CBMs) is one of the main approaches to …
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This article summarises the generation, characteristics, and treatment methods of copper slag, a by-product of copper smelting. It also discusses the technical …
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A flotation machine of 0.5 L volume at an impeller speed of 1992 rpm was used to recover Cu from the slag. Firstly, 100 g batch of slag was ground in a ball mill at 60% grinding concentration for 5 min. ... Process flow diagram for the co-treatment of SCA and copper slag. 4. ... Green and efficient utilization of waste ferric-oxide desulfurizer ...
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In the copper smelting process, more than two tons of slag is produced with each ton of copper. Copper losses in smelting slags are made up of chemically soluble copper (≈ …
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1. Introduction. Slag examined in this study is defined as the predominantly silicate and oxide by-product derived from smelting metallic ore. The two main types of slag included in this discussion are from the primary production of ferrous ores, from iron and steel manufacturing, and from non-ferrous ores, from the recovery of base metals and …
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Copper slag is a waste produced during pyrometallurgical processing of metals from copper concentrates. The decomposition and oxidation reactions of the …
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Air-cooled and granulated copper slags have several favourable mechanical properties for use as aggregates in construction such as excellent soundness characteristics, excellent abrasion resistance and good stability (Gorai et al., 2003).These properties of copper slag make it suitable as a partial or full replacement for Portland …
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A summary of the best technologies available for recovery of precious and base metals from electronic waste. +1.604.988.0058 info@emew. Facebook; ... of 350 cruise ships. This represents an increase of 21% in five years. An estimated $57 billion worth of gold, silver, copper, platinum, and other recoverable metals was dumped and …
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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 …
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Schematic diagram of resource utilization of the copper slag (CS-1). 2.4. ... The potential for copper slag waste as a resource for a circular economy: a review – part II. Miner. Eng., 172 (2021), Article 107150, 10.1016/j.mineng.2021.107150. View PDF View article View in Scopus Google Scholar.
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Copper slag is a by-product of copper smelting that contains valuable elements and can be used as a material resource. Learn about its chemical composition, mineral phases, …
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Newswise — Copper smelting is a major source of copper production, generating significant amounts of slag. In 2022, China produced over 11,000 kilotons of refined copper, leading to 2.2 to 3 ...
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CuS slag samples were obtained from Jiangxi Ganfeng Lithium Co., LTD. (the specific source of production of CuS slag is given in Fig. S1 in Supporting information). The cathode of electrodeposited copper comes from copper foil stripped from waste lithium batteries (waste lithium batteries from Jiangxi Ganfeng Lithium Co., LTD.).
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This article reviews the production, composition, environmental behavior and treatment options of copper slag, a by-product of copper smelting and converting. It …
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The experiments were conducted with 100 g of copper slag. oThe temperature of digestion was 250 C. The residue was leached using a single volume of distilled water for 12 h. …
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Hence, it is suggested that copper slag should be used in combination with cement to improve its pozzolanic activity. Copper slag has conductive characteristics because the content of Fe 2 O 3 in copper slag is very high (64.6% by weight). Lim et al. utilized copper slag and high-carbon fly ash to prepare a conductive CLSM. Increasing …
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Some physical and mechanical properties of copper slag is shown in Table 2. Air-cooled copper slag has a black colour and glassy appearance. The specific gravity varies with iron content, from a low of 2.8 to as high as 3.8. The unit weight of copper slag is somewhat higher than that of conventional aggregate.
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Conventionally, little chemical adjustments are made to the slag prior to its processing for subsequent use or disposal. However, recent attempts have looked into modifying the chemical composition of slag while hot, to render its chemistry and properties suitable for high-value products or recovery of minerals/metals from slag [11, …
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Nonferrous metals (Cu, Pb, Zn) remaining in copper converting slag have become a global problem in copper pyrometallurgy. 1 By the end of 2020, more than 30 copper smelters were put into operation in China with an annual capacity of refined copper of 10,225 kt, ranking first in the world. 2,3 After more than 100 years of development, …
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With the purpose of recovering the metal values, in this study the copper slag was reduced by coke and biochar at 1250 °C in an argon gas atmosphere using the isothermal reduction/drop quenching technique. The phase compositions of metal, matte, and slag were determined using electron probe microanalysis (EPMA). The effects of …
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Large amounts of solid wastes are produced in copper and aluminum smelting processes, which not only cause losses of valuable resources but also threaten the ecology and environment. In this study, a reduction–sulfurization smelting method was used for recovering Cu and Co from converter slags by using spent pot lining (SPL) as the …
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Blast furnace (BF) slag, which is the main byproduct in the ironmaking process, contains large amounts of sensible heat. To recover the heat, a new waste heat-recovery system—granulating molten BF slag by rotary multinozzles cup atomizer and pyrolyzing printed circuited board with obtained hot BF slag particle—was proposed in …
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In order to maximize the utilization value of copper slag, a process of smelting copper–iron alloy with copper slag is proposed here. The reduction kinetics of copper slag by H2 are studied in this paper. The main phases of the copper slag were Fe2SiO4 and Fe3O4. The suitable conditions of reduction were a temperature of …
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The current practice for management of copper slag waste based on a linear flow model of 'produce, use and dump' is unsustainable due to finite resources, a limited …
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Copper slag is a by-product of the copper extraction process. It is often used for sandblasting, but it can also be used in construction as a replacement for river sand when making concrete. Using Copper Slag in Construction. Copper slag has a higher specific gravity than river sand, which means it can be used to produce concrete …
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Copper slag tailings, primarily stemming from pyrometallurgical processes, predominantly consist of a silicate matrix [].It is estimated that 2–2.2 tons of slag tailing are generated for every ton of copper produced, and approximately 40 million tons of slag are generated from global copper production [2,3,4].Unfortunately, slag tailings are often …
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By TER-DR2, for every ton of copper slag, 0.489 t DRI, 67.3 m3 CO and 67.3 m3 H 2 are acquired. Keywords Copper slag Waste heat recovery Direct reduction Thermodynamic compass Introduction As a widely focused metallurgical slag, copper slag con-tains large amount of iron and waste energy. The temper-ature of molten copper slag is above …
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The dissolution of CO 2 in the aqueous ammonium salt solution is the speed-control part of the Slag2PCC process (c.f., Equation 2). Results reported that 4–5 mm CO 2 bubbles dissolved when they rose ~1.6–1.9 m in an unmixed water column (Legendre and Zevenhoven, 2016, 2017).Recently, Zevenhoven et al. (2019) proposed that properly …
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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 …
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Download scientific diagram | XRD pattern of waste copper slag. from publication: Stepwise Utilization Process to Recover Valuable Components from Copper Slag | Waste copper slag is a typical ...
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Based on the physicochemical reaction of the melt, the process of copper slag cleaning in an electric furnace could be divided into two steps: reduction and …
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The apparatus for reduction experiments is shown in Fig. 3.Reduction experiments were performed in an electric tube furnace. An alumina crucible containing 300 g of copper slag was placed in the furnace, heated to 1250 °C under a protective N 2 atmosphere and held for 30 min after which the mixed gas, consisting of 70% H 2 …
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In this study, our primary focus centers on evaluating the compressive and flexural strength of copper tailings-granulated blast furnace slag (CT-GBFS) geopolymer at 7 days and 28 days of curing. Mechanical property assessments were conducted using an electronic compression and flexural testing machine [37]. For the compressive strength …
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1. Introduction. Steel slag is the main solid waste generated in the steel-making process, accounting for 15 to 20% of crude steel output [1].China's crude steel output in 2021 was 1.035 billion tons [2], more than half of the global crude steel output (1.9505 billion tons) [3], and the steel slag output exceeded 120 million tons.In contrast, …
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A study published in Transactions of Nonferrous Metals Society of China. detailing a novel method for the recovery of. copper, lead, and zinc from copper smelting slag using a sulfurization-reduction approach.This innovation represents a significant stride in metallurgical waste management, with potential impacts on both industry practices …
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J.MARKU, K. VASO OPTIMIZATION OF COPPER SLAG WASTE CONTENT IN BLENDED … ZAŠTITA MATERIJALA 51 (2010) broj 2 77 JOZEFITA MARKU 1, Scientific paper KOZETA VASO 2 UDC:620.196 :666.943.022 Optimization of copper slag waste content in blended ... In terms of the cement chemistry ternary phase diagram,
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