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2.1.1. Copper Smelting Slag The chemical composition of copper smelting slag is given in Table 1, which illustrates that it contains high content of T.Fe, Zn, Cu and SiO 2 as well as S. The miner-alogical analysis of copper smelting slag was investigated by XRD. The result in Fig. 1 indicates that the main crys-talline phases are fayalite (Fe 2SiO
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The effective utilization of copper slag in such procedures may lead to reduction in the cost of disposal and leads to less environmental problems. Caijun Shi et al (2008) studied the characteristics of copper slag on the mechanical properties of cement, mortars and concrete and concluded that by the use of copper slag in cement and concrete,
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National Natural Science Foundation of China (51564016), basic research on selective chlorination of copper in copper slag and its resource utilization, in research, presided over, 2016-2019 10. The National Natural Science Foundation of China (51564017), based on multi-scale simulation of clinker additives to inhibit secondary reaction inhibition mechanism …
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Table 4: Utilisation of copper slag as a component of raw mix. (Coal ash absorption +4.75%). The contents were thoroughly blended and ground to a fineness of 10% residue on 170 mesh. Nodules of about 1cm in diameter were prepared and dried in an oven at 105±5°C for 2 hours before subjecting them to burnability studies.
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Disposing spent copper slag malaysia . copper slag disposal proper disposal of copper slag verhuurdomsbe Slag Wikipedia Slag is the glasslike byproduct left over after a desired metal has been separated, vitreous material found on the …
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Utilization of modified copper slag activated by Na 2 SO 4 and CaO for unclassified lead/zinc mine tailings ... Na 2 SO 4 was found associated with C–S–H gel formation accompanied by a compact microstructure and better pore distribution with lower porosity. However, deposition of chloride compound was found in the surface layer of CSN ...
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This paper summarized and reviewed the mechanism and macro-performance of alkali-activated metallurgical slag, including steel slag, copper slag, ferronickel slag, and lead-zinc slag. Better activated method and alkali-activator are still needed to be developed to improve the performance of the metallurgical slag with low reactivity. Besides, the chemical …
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Abstract. Lead slag is produced by the primary and secondary lead industry. The large amount of lead slag discharge causes environmental problems. Reducing the toxicity and increasing utilization of lead slag are important measures to solve the negative impact of lead slag on the environment. Here, we review the lead slag physical and chemical ...
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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 of tons over the years.
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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 slag can be used as …
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A novel hydrometallurgical method was developed to recycle valuable metals of Si, Fe and Cu from copper slag. The leaching rates of 98%, 99% and 91% for SiO2, Fe and Cu, respectively, were obtained under optimized parameters: solid-to-liquid ratio is 1:10; concentration of hydrochloric acid is 35%; the reaction time is 2 hours and at 80-90°C.
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The method provides complete utilization of all slag components. 95% of the copper goes in metallized alloy, and about 0.02% Cu, 2–5% Fe, and 0.2% S remain in the slag of the second reduction stage. The copper-containing alloy is converted, and lead and zinc are transferred into sublimates.
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"matte" (copper sulfide and other metal sulfides), blast furnace slag (primarily silicates), and lead bullion (98% by weight). All layers are then drained off. The speiss and matte are sold to cop-per smelters for recovery of copper and precious metals. The blast furnace slag, which contains zinc, iron, silica, and lime, is stored in piles and
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On the one hand, copper slag is nowadays a waste in copper pyrometallurgy despite the significant quantities of iron (>40 wt. %) and copper (1 to 2 wt. %). On the other hand, solar energy, when properly concentrated, offers great potential in high-temperature processes. Therefore, concentrated solar power (CSP) could be used in the treatment of copper slag to …
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Waste copper slag contains abundant valuable metal element Fe, and residual elements such as Cu, As, Pb, Zn, and Mo. Simply stockpiling or landfilling would waste valuable metal resources and cause contamination due to the leachable harmful elements. In this paper, the HJ/T299-2007 test and TCLP test have been utilized to evaluate the leaching toxicity of …
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The experimental results show that the addition of 40% copper slag lead to more than 30% growth of the 1 day's compressive strength of MPC mortar. The crystalline phases in copper slag, especially the fayalite (Fe 2 SiO 4 ), could react and strongly increase the content of hydrates in MPC system.
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Lead and lead–zinc slags are black to red in color and have glassy, sharp, and angular (cubical) particles. The unit weight of granulated lead and lead–zinc slags can vary from less than 2500 kg/m 3 (156 lb cf) to as high as 3600 kg/m 3 (225lb cf). Granulated lead slag is a black granular material having a high specific gravity of 2.65 to 3.79, due to the high content of iron oxide …
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Copper slag contains valuable metals such as iron, copper, gold, silver, lead, and zinc, which have extremely high recycling value. Physical, hydrometallurgical and pyrometallurgical methods for valuable metals recovery from copper slag are particularly reviewed in this paper.
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Use of waste materials in road construction has been in vogue in India for quite sometime. This is particularly necessitated by the problems of disposal associated with it. Otherwise, these materials would cause problems to the environment. Copper slag is one of the waste materials that are being used extensively in the civil engineering construction industry.
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the copper slag is mixed with calcium-based compound like lime, the silica and alumina present in copper slag may react chemically on improvement of sub-grades and sub-bases. The present paper discusses the shear parameters of the copper slag when admixed with lime with 14 and 28 days of curing period. 2. Experimental Study 2.1 Materials Used
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et al. [2]). The copper slag is generally similar to sand as far as maximum, minimum and average void ratios are concerned. The angle of friction of shearing resistance of the slag is generally higher than that of sands. This is because of angularity of the slag particles. Utilization of copper slag for
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Copper slag gel is composed of copper slag mixed with 0.5 mg/L sulfuric acid. The encapsulation product is prepared by adjusting the gel pH to 7 and then mixing and drying with sludge. Under room temperature, an initial gel pH of 7 and a Si/As molar ratio of 0.5, 20 h of aging can result in the encapsulation of 99.8% of arsenic in sludge with an original arsenic …
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@article{osti_6589626, title = {Copper slag thermal storage -- projections of performance and economics}, author = {Curto, P A}, abstractNote = {A solid residual regarded as waste from copper smelters, known as copper slag, offers an excellent medium for the storage of heat energy. Over one billion tons of slag is available at hundreds of smelters around the world.
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(copper slag) for the soil improvement. Copper slag, which is produced during production of copper from copper ore, contains minerals like iron, alumina, calcium oxide, silica, etc. For every tone of metal production about 2.2 tone of slag is generated. Total generation of copper slag is about 24.6 million tones throughout the world.
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Large amounts of lead slag are produced during the production of primary lead and secondary lead. Considering lead concentrate smelting as an example, a primary lead smelting system production of 1 t of lead will discharge 7100 kg of lead slag ().At the secondary lead recycling process, for each ton of metallic lead produced, 100–350 kg of slag are generated …
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Advances in Comprehensive Utilization of Lead-zinc Smelting Slag. CHEN Lingling, HAN Junwei,, QIN Wenqing, Liu Wei. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, Hunan, China. More Information. Corresponding author: HAN Junwei, [email protected]. Received Date: 09 March 2021.
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Iron recovery from a lead slag in Henan province was carried out with the technique of coal-based direct reduction followed by magnetic separation. Scanning electron microscopy (SEM) was used to investigate the transformation of iron-containing minerals and the particle size of metallic iron generated by coal reduction. The results showed that technique is feasible for iron recovery …
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