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copper tailings a vendre
copper tailings a vendre
copper tailings a vendre :
New approaches for extracting and recovering metals from mine tailings ...
2017.5.15 Mineral tailings from two copper mines were bioleached under different conditions. • Greatest copper extraction was achieved at extremely low pH, at 45 °C and
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Regionalized Life Cycle Inventories of Global Sulfidic
2023.5.3 16 reveals that together, copper tailings from the large (i.e., porphyry) and medium-size copper 17 deposits (i.e., volcanogenic massive sulfide and sediment
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Evaluation of heavy metal contamination in copper mine
2022.7.4 An investigation of concentrations of copper, cobalt and cadmium minerals in soils and mango fruits growing on Konkola copper mine tailings dam in Chingola,
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Mineralogical characterization of copper sulfide tailings
2020.5.13 This research reveals the occurrence mechanism of copper minerals in typical copper sulfide tailings using quantitative mineral liberation analysis (MLA)
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Geotechnical Properties of Mine Tailings Journal of
2016.9.14 In this study, a series of laboratory experiments were conducted to investigate the static and cyclic mechanical properties of four tailings, including the
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Past, Present, and Future of Copper Mine Tailings
2022.10.11 In general, copper mine tailings are the waste material that remains after the economic fraction is extracted from the mineral ore. Copper mine tailings consist of a
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Strength and durability characteristics of copper tailing concrete
2013.11.1 Copper tailing is the solid waste material left during the purification of the precious copper from the copper ores. Disposal of these waste tailings are very essential
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(PDF) Prospective environmental assessment of reprocessing
2022.7.28 This study conducts a process-based life cycle assessment (LCA) study to investigate multiple reprocessing pathways of copper tailings to co-produce secondary
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Synthesis and influencing factors of high-performance
2023.1.1 The copper tailings used in the study is from the whole tailings of a copper tailings in Yunnan Province. The main chemical composition is Fe 2 O 3, CaO, SiO 2 and Al 2 O 3 (Tab. S1). The main heavy metal elements of the tailings are Cu > Cr > Zn > Pb (Tab. S2). The leaching concentration of theses heavy metal ions of copper tailings is ...
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Heavy metal and nutrient uptake in plants colonizing post
2017.10.23 Copper ore mining and processing release hazardous post-flotation wastes that are difficult for remediation. The studied tailings were extremely rich in Cu (1800 mg kg−1) and contaminated with Co and Mn, and contained very little available forms of P, Fe, and Zn. The plants growing in tailings were distinctly enriched in Cu, Cd, Co, Ni, and
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Utilization of high-volume mine tailing and by-products in
2022.4.16 This study was designed to investigate the hardened performance of the paste specimens produced using a composite binder with high volumes of mine tailings incorporating various by-products. Mine tailing and fly ash (FA) content was tested at 40%, 50%, and 60% of total paste volume, and tailing pastes were produced at w/b ratios of
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Mineralogical characterization of copper sulfide tailings
2020.5.13 As ore grades constantly decline, more copper tailings, which still contain a considerable amount of unrecovered copper, are expected to be produced as a byproduct of froth flotation. This research reveals the occurrence mechanism of copper minerals in typical copper sulfide tailings using quantitative mineral liberation analysis (MLA) integrated with
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(PDF) Prospective environmental assessment of reprocessing
2022.7.28 copper tailings (Alcalde et al., 2018), the current production facility has better bene ciation performances than decades ago, with the average tailings copper grades detected around 0.1%-wt.
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Feasibility Evaluation of Replacing River Sand with Copper Tailings
2021.7.7 This study aims to realize the resource regeneration application of copper tailing (as fine aggregates for partial replacement of natural fine aggregates), which avoid environmental pollution due to many landfills of copper tailings. The compressive strength and durability (dry shrinkage and sulfate attack) tests were carried out to evaluate the
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High efficiency regulating sedimentation and ... - ScienceDirect
1. Introduction. Due to the ever-growing demand for copper minerals, a significant amount of copper tailings have been produced as byproducts during the extraction of valuable copper minerals (Furnell et al., 2022; Rebello et al., 2021).According to the latest Global Tailings Review, approximately 14 billion tonnes of mineral tailings have been produced, of which
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Enhanced flocculation and sedimentation of copper tailings
2023.7.1 The copper tailing sample used in this study was obtained from Dexing Copper Mine, Jiangxi Copper Co., Ltd (Jiangxi Province, China), which is the largest open-pit low-grade copper mine in Asia. It generates about 100 million tons/annual of copper tailings and transports them to tailings ponds over long distances.
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Environmental impacts evaluation of treated copper tailings
2020.9.1 For each 1 tonne of refined copper, between 2 and 3 tonnes of copper slag and 196.5 tonnes of tailing are released to the environment and stored mostly on tailing dams or subterranean (Davenport et al., 2002). Tailings are placed in big dams at a rate of approximately 540 millions of tonnes each year in Chile alone (SERNAGEOMIN, 2019).
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Statistical analysis of tailings ponds in China Request PDF
2020.5.1 According to statistics, the number of known tailings ponds in China in 2019 was 5,189. Most of them were distributed in isolation and nearly 80% of tailing ponds are less than 0.363 km 2 in area ...
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Mining tailings and alkali activation: a comprehensive
2022.11.4 Significant amounts of mining tailings are generated and disposed of every year in dams, leading to potentially serious environmental and safety problems. To identify alternatives for the disposal of these wastes, research works involving their potential application as precursors in the development of alkaline-activated materials have been
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Recovery of iron from copper tailings via low-temperature
2017.9.5 Currently, the majority of copper tailings are not effectively developed. Worldwide, large amounts of copper tailings generated from copper production are continuously dumped, posing a potential environmental threat. Herein, the recovery of iron from copper tailings via low-temperature direct reduction and magnetic separation was
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Coal slime as a good modifier for the restoration of copper tailings ...
2023.9.28 In recent years, the solid wastes from the coal industry have been widely used as soil amendments. Nevertheless, the impact of utilizing coal slime for copper tailing restoration in terms of plant growth, physicochemical characteristics of the tailing soil, and microbial succession remains uncertain.Herein, the coal slime was employed as a
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Feasibility Evaluation of Replacing River Sand with Copper Tailings
2021.7.7 This study aims to realize the resource regeneration application of copper tailing (as fine aggregates for partial replacement of natural fine aggregates), which avoid environmental pollution due to many landfills of copper tailings. The compressive strength and durability (dry shrinkage and sulfate attack) tests were carried out to evaluate the
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Stability of Tailings Dam Constructed by both Upstream and
2023.7.28 After investigating the Longdu tailings pond site, a typical section profile 2–2’ was selected for this numerical modelling, as shown in Fig. 4.In addition to solving the practical engineering problems for Longdu tailings pond, this paper intends to compare the seepage and displacement fields, stability, and storage ability of the tailings dam
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Environmental Impact Variability of Copper Tailing Dumps in
2021.8.27 Acid mine drainage and potentially toxic elements release are a major source of pollution in sulfide-rich mining sites. Pyrite is the most impacting mineral due to its high acidification potential when it reacts with water under oxidizing conditions. At the Fushe Arrez dressing plant in Northern Albania, a volcanic massive sulfide copper mining
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Evaluation of heavy metal contamination in copper mine
2022.7.4 The reason the pH of some mine waste soil was acidic is due to the sulphidic ores from which copper is extracted using sulphuric acid. However, most soil samples tested from tailings dams had an alkaline pH which correlates with the previous findings at Mindolo tailing dams in Kitwe where the pH was 7.8.
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Oxalic acid modified copper tailings as an efficient adsorbent
2021.1.1 Preparation of oxalic acid modified tailings (OMT) The obtained tailings were ball milled to smaller than 200 mesh (74 μm) and dried at 100 °C. Effect of modification time on Pb 2+ removal. As shown in Fig. 1, after reaction of 180 min, Pb 2+ removal efficiency was 15.56% and the corresponding removal capacity was 19.45 mg/g for the copper ...
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A new analytical model to predict the effect of suction
2023.9.5 In the present research, the radial consolidation of saturated samples of silt-sized fine copper tailings under vacuum preloading was studied using a new laboratory setup. As the most important purpose, the influence of vacuum removal at different steps of vacuum preloading on the consolidation response of the Sungun mine slurry samples
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Copper mine tailings valorization using microbial induced
2021.11.15 The solidification of copper mine tailings was investigated by using the natural biological process known as microbial induced calcium carbonate precipitation (MICP) as a potential method to valorize this waste stream. A submergent method was used to grow bio-columns and the toxicity of copper on Sporosarcina pasteurii (the ureolytic
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(PDF) Bio-Mediated Method for Immobilizing
2022.4.8 2021, the annual emission of copper tailings slag in China can reach 335 million tons. Im-mense quantities of tailings accumulate in the form of large hills or water ponds, which.
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Sustainability Free Full-Text Study on the Effect of the Copper ...
2022.11.18 The copper sulphide mining process would produce a large number of copper tailings that can be treated with different substrates so as to act as guest soil in the ecological reclamation of the mine. In order to reveal the influence of different copper tailing treatment substrates on plant growth, in this experiment, tall fescue (Festuca
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Investigatingthesuitabilityand cost-bene
2023.11.14 Copper tailings are a waste material produced from the concentration of copper to copper concentrates (Gou et al., 2019) with a copper content of less than 0.01% (Sikaundi, 2008).
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Innovative Methodology for Sulfur Release from Copper Tailings
2020.3.14 The content of residual S in the copper slag was determined by the combustion neutralization method [], and the sulfur release rate (n) was calculated as the following formula: where M 1 and M 2 are the masses of samples before and after roasting, respectively, g and S 1 is the initial sulfur content of the copper tailings, while S 2
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Effect of composite amendments on physicochemical properties of copper ...
2022.10.15 The plant growth responses. According to plant height (Fig. 1a) and fresh weight (Fig. 1b), the optimum chemical ratio of conditioner and straw as the copper tailings amendments was determined.A single application of conditioner had greater effects on growth indexes of ryegrass than a single application of straw, and the effect of a mixture
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Assessment of the adaptive capacity of plant species in copper
2017.9.30 Purpose The objective of this work was to identify hyperaccumulator plants and evaluate their capacity on copper mine tailings in the Antofagasta Region (Chile), considered one of the most arid in the world. Materials and methods Two native plant species, Gazania rigens and Pelargonium hortorum, were grown during 11 weeks on
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New approaches for extracting and recovering metals from mine tailings ...
2017.5.15 Mineral tailings from two copper mines were bioleached under different conditions. • Greatest copper extraction was achieved at extremely low pH, at 45 °C and under oxidative/reductive conditions.. Copper present in tailings PLS was selectively precipitated as CuS by biogenic H 2 S.. Microbial communities were dominated by Sb.
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Copper mining in the eastern Amazon: an environmental
2021.10.21 Mining activity is of great economic and social importance; however, volumes of metallic ore tailings rich in potentially toxic elements (PTEs) may be produced. In this context, managing this environmental liability and assessing soil quality in areas close to mining activities are fundamental. This study aimed to compare the concentrations of
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Copper tailings reprocessing - Sciendo
2023.8.5 In a situation in which global copper demand is growing and copper prices are steadily increasing, reprocessing copper tailings is becoming an increasingly logical decision [7, 8, 9]. In most of the copper tailings deposited in the last century, there is a sufficiently high content of valuable components so that the tailings can be economically ...
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