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In this work, an innovative and carbon-free smelting reduction process is proposed to recycle valuable metals from waste copper slag using secondary aluminum dross as a reductant. Experimental and thermodynamic investigations were carried out to understand the reaction and separation process and its correlation with smelting …
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Copper slag can be used in cement (Zhang et al. 2022c) and concrete because it has pozzolanic activity (Gabasiane et al. 2021). Copper slag can also be used in abrasive tools (Gorai et al. 2003 ...
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Copper Slag can be used for construction of the top layer, base course and substructure of roads where it can be used as soil or aggregate, unbound, bituminous or hydraulically bound. ... (2010) Use of recycled copper slag in cement-treated Singapore marine clay In: Proceedings of, Berlin, Heidelberg, pp 705–710.
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The present work is aimed at addressing both aspects by employing recycling to generate wealth from copper slag and producing utilizable materials at the same time thus restoring the ecosystem. Copper slag was characterized and processed. ... The work established that the copper slag, a waste material, can be successfully processed to generate ...
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The flotation of copper slag can effectively recover copper, without recycling other valuable metals in the copper slag. However, this process requires a much higher water content and offers relatively low environmental benefits.
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Raghavan et al. [38] made a comparison between the mechanical properties of recycled concrete and natural concrete by using copper slag, iron slag, and recycled concrete aggregate as fine aggregate and coarse aggregate with various proportions of mix respectively. The results revealed that the concrete made with 25 % recycled concrete …
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Like most metals, including aluminum, copper, and brass, steel can be continuously recycled without any damage or degradation to its properties—no matter the product or form it takes. In fact, steel tops …
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In recent years, the use of natural fibers in concrete has gained considerable attention due to their potential as a sustainable alternative to conventional steel reinforcements. This paper investigates the strength performance of natural fiber-reinforced recycled aggregate concrete using copper slag as a replacement for fine aggregate. …
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Slag recycling proved reliable as the yielding characteristics were found equivalent to flux in submerged arc welding. Weld metal chemistry was found to be satisfactory for recycled slag as per AWS SFA 5.17. The percentage of C, Mn, Si, S and P deposited with recycled slag was investigated as 0.089%, 1.101%, 0.123%, 0.019% …
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The pathways between copper scrap and recycled copper can be long and intricate. Generally speaking, these pathways can be simplified into three general steps: waste collection, sorting and separation, and metallurgical metal recovery. ... The legal requirements for slag recycling (e.g. cement, gravel) have been tightened progressively …
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Copper slag waste has continued to cause increasing concerns due to the huge volumes being produced annually worldwide. This paper presents a review of copper slag as a potential resource for cobalt and copper metals for a circular economy. An overview of the chemical and mineralogical characterisation of copper slag from 21 …
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The ferrous slag is able to be recycled in internal recycling (reutilization in steel plants), civil construction, agriculture, etc. Internal recycling of slag after magnetic separation in iron- and steelmaking industry is attempted in multiple ways.
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For these reasons, Fe resources contained in copper slag can be recycled efficiently by the direct reduction method. The obtained metallic iron produced, with more 90% iron content, is an excellent raw material for the iron and steel industry .
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Copper slag is generated when copper and nickel ores are recovered from their parent ores using a pyrometallurgical process, and these ores usually contain other …
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Copper slag is generated when copper and nickel ores are recovered from their parent ores using a pyrometallurgical process, and these ores usually contain other elements which include iron, cobalt, silica, and alumina. Slag is a major problem in the metallurgical industries as it is dumped into heaps which have accumulated into millions …
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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 ...
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Slags from the ferrous and nonferrous metallurgical industries have been used to treat toxic contaminants in water and wastewater. Using slag as a recycling or renewable resource rather than a waste product has environmental and economic benefits. Recycled smelter slags can be used in both in situ and ex situ treatment. However, their …
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Copper smelter slag can be effectively recycled into pig iron and glass. • Thermodynamics and phase diagrams were employed for carbothermal reduction of slag. • The process was optimized and preferred regime of slag reduction was identified. • Results can help sustain the mining and metallurgical industry.
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The recycling and utilization of copper slag is of great interest because it avoids the loss of valuable metals and the threat of harmful metals, and saves a lot of …
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Slag can also be generated during the recycling of raw materials (i.e., Pb scrap recycling, alkaline battery recycling) and during the vitrification of municipal and nuclear waste. ... Copper slag commonly contains As, Co, Cu, Pb, and Zn, and locally Cd that exceeds one or both of the soil screening levels (Fig. 13).
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Raffinate generated at copper mines is generally stored in ponds and recycled back to the leaching operation as a leaching solution. Raffinate can contain TENORM and needs to be properly managed. ... Slag is associated with smelter operations, which may or may not be co-located with the mines. Copper slag can be …
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Several waste metals have been used as an additive in the pr duction of cement such as nickel slag [46], or to improve the integrity of cement paste su as recycled copper slag [47], replacing ...
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Therefore it seems to suggest that copper slag can be used in treating soft marine clay with less amount of cement and yet no reduction in strength can be achieved. ... S.K. (2010). Use of Recycled Copper Slag in Cement-Treated Singapore Marine Clay. In: Chen, Y., Zhan, L., Tang, X. (eds) Advances in Environmental Geotechnics. Springer, …
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There are two main ways for recovering iron from the copper slag: (i) first, Fe 2 SiO 4 is oxidized to Fe 3 O 4, and then the Fe 3 O 4 enriched concentrate can be obtained by magnetic separation (Zhang et al., 2005).The iron recovery in concentrate obtained by this way is low, and the Fe 3 O 4 concentrate needs to be reduced again to …
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Furthermore, copper slag and recycled aggregates were used both independently and in combination to replace 50% of the volume of fine and coarse aggregates. The polycarboxylate ether admixture percentage with respect to binder content ranged between 1.0 and 2.2 depending upon the requirement to maintain the nominal …
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The study demonstrated that copper slag can be carbothermally smelted with partial reduction of iron oxide (FeO) to a metallic phase comprising of copper and …
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1. Introduction. Copper slag (CS) is a solid waste generated from the production of copper metal. Approximately 2.2–3 tonnes of slag is generated for every tonne of copper produced (Sharma et al., 2017a).The annual production of CS is estimated to be approximately 40 million tonnes worldwide (Dhir et al., 2016).China has become …
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The slag generated by the steel plant has been utilized to produce submerged arc welding flux. The flux produced by recycling steel slag has been applied in the submerged arc welding process. The effects of recycled slag on the chemical composition, microhardness, and microstructure of weld metal have been evaluated. For …
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Recycling copper slag can make a positive contribution because there is significant energy invested in these slags, and it contains various metals possible to be …
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Copper slag recycling and processing plant During blasting, copper slag breaks into smaller particles on impact with metal surfaces. After several rounds of reuse, the copper slag gets contaminated with rusts and paints and becomes a waste material but without any change in its chemical composition. The
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