— The eastern Adirondack Mountains in upstate New York were heavily mined for iron in the 1800s and 1900s and played an important role in industrialization of the Northeast prior to and during World War II. The mining activities resulted in piles of waste rock and mill tailings (the residuals of ore processing) in various areas throughout the …
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— The mine tailings are inhomogeneous and have a complex mineral, aggregate, and chemical composition [59, [109], [110], [111]].Furthermore, although having relatively low quantities of valuable components, mine tailings contain hazardous and toxic compounds connected with waste products or mining activities [82, 84, [112], [113], …
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— Mining operations degrade natural ecosystems by generating a large quantity of mine tailings. Mine tailings remain in dams/open ponds without further treatment after valuable metals such as iron ore have been extracted. Therefore, rehabilitation of tailings to mitigate the negative environmental impacts is of the utmost necessity. This review …
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— Pre-concentration followed by magnetization roasting and magnetic separation process was well recognized to be very effective in recycling iron from iron ore tailings. An iron concentrate containing 66.35% Fe with a total recovery of 57.74% was produced under the optimal experimental conditions (i.e., roasting temperature, 540°C; …
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— The chemical composition of MTs is influenced by the nature of the parent ore, processing reagents used during mineral extraction, the degree of target mineral recovery, and physicochemical changes during tailings storage ... gold tailings (0.01–0.3 wt%) [24], iron tailings (0.015–0.08 wt%) [78], lead-zinc tailings (0.2–0.3 wt%) ...
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— The tailings used in this study were iron ore waste tailings originally supplied by ArcelorMittal USA, steel and mining company operating in the USA. The tailings preparation process comprised of a number of steps, the first of which was taking a 45-kg wet sample of +4.0 mm feed size from the waste tailings, and passing it through a …
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— The iron ore tailings (IOT) used in this work were collected from four Class III high environmental risk iron ore tailings-dams [26]. These (Fig. A.1) were selected based on the associated social and environmental potential risks, as well as economic relevance, as described in the dams inventory of the Minas Gerais State [27]. All four dams are ...
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— To solve this problem, the idea of separate characterization and separate upgradation of different tailings streams of an iron ore processing plant was carried out and a comparison was made ...
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— In this paper, the properties, mineral magnetic modification, and beneficiation of tailings from the central mining and processing plant in Kryvyi Rih, Ukraine, have been studied. Samples were investigated by X-ray diffraction, X-ray fluorescence, microscopy, and magnetization measurements. The beneficiation was conducted using …
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— Mine tailings, the byproduct of mining and mineral processing, are increasingly mass produced as a result of increased demand for metals and minerals as …
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— The exploitation of iron ore requires the construction of dams to dispose of waste after processing it. This residual material is called tailings and the specific physical-chemical characteristics depend on the beneficiation process adopted and vary depending on the main constituents and the presence of trace elements and residual organic …
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— In Vietnam, there are many technological research projects on iron ore beneficiation and processing. The main technologies are washing and scrubbing …
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— Based in the state of Minas Gerais, Brazil, Agera receives the sand produced from the treatment of tailings at Vale's iron-ore operations in the state and promotes its commercialisation and distribution. Vale began producing Sustainable Sand in 2021 after seven years of research as a substitute for sand extracted from the environment.
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— Dry processing of iron ore: In dry processing of iron ore, ROM is generally crushed below 40 mm through three-stage crushing and thus segregated by screening into 10–40 and −10 mm fractions. For softer ore, tumbler index is generally low and hence lump ore is crushed below 10 mm to produce fine product. Yield from the plants has …
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— Extracting and processing ore involves significant quantities of residue material – including tailings. As the world's demand for raw materials has grown at an accelerating pace in recent decades, and as the grades of many ores have decreased over time, so the volumes of this residue material have increased, exponentially.
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— Specifically, Phoenix Tailings produces iron through molten oxide electrolysis. Their proprietary process is designed to economically recover high-grade iron from tailings, including iron ore tailings and bauxite residue, leading to the successful remediation of the sites.
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— Iron ore tailing is currently one of the most important secondary mineral resources. Pre-concentration followed by magnetization roasting and magnetic …
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— However, after early ecological engineering of mine tailings, Li et al. found the legume Acacia auriculiformis could grow better in iron ore tailings eco-engineered with exogenous OM and pioneer plant colonisation. Furthermore, this legume formed nodules and promoted N 2 fixation in eco-engineered iron ore tailings. Compared with plants ...
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— The formation of geopolymers from mine tailings using cold-bonding processes is known to be possible. Numerous cold-bonding methods exist, but the hydrothermal processes involving high temperatures and pressures in the presence of steam have been found to be the most ideal. This paper presents the results of …
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In this report we share the findings of our analysis of an independently collected sample of ore - sand from one of Vale's largest iron ore processing sites in the state of Minas Gerais, Brazil. Since the devastating tailings facility failures that …
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— With advent of novel technologies, mining companies are now figuring out ways to extract valuable metals from tailings. In gold, copper sulfide and iron ore tailings, the potential of extracting minerals is an opportunity. Reprocessing tailings to collect the valuable minerals can be a cost-effective approach compared to processing material.
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Mine tailings are the waste material that remains after the economic fraction has been extracted from the mineral ore. Tailings consist of a slurry of ground rock, and water and chemical reagents that remain after processing. The composition of mine tailings varies according to the mineralogy of the ore deposit and how the ore is processed.
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— Disposal of iron ore tailings (IOT) in dry stacks is increasingly common in Brazil. IOT are compacted in layers using drum rollers that cause compaction and vibration effects on the ground. Particle breakage is usually observed in granular materials when subjected to large static loads, as can occur depending on the stacking height achieved. …
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— Particularly, iron ore tailings (IOT) as ordinary industrial solid waste in China is discharged and deposited. This review is a recapitulation of the material characteristics of IOT and its effects on the workability, mechanical properties, and durability of concrete. ... The detailed process is shown in Fig. 1. Download: Download high-res ...
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— Mining is an important industry, accounting for 6.9% of global GDP. However, global development promotes accelerated demand, resulting in the accumulation of hazardous waste in land, sea, and air environments. It reached 7 billion tonnes of mine tailings generated yearly worldwide, and 19 billion solid tailings will be accumulated by …
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— In this study, a pilot-scale experiment on the iron recovery from iron ore tailings was investigated using innovative technology of pre-concentration and …
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— In the Sivas-Divriği Iron Ore Concentrator, 600,000 t of tailings are discarded annually. There are already 1 million t of tailings deposited in ponds from the previous production activities. ... 84.6% Ni, and 76.8% Cu recoveries from the new process tailings. Keywords: flotation; Co; Ni; iron ore tailings; dithiophosphate; potassium; amyl ...
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— Mine tailings, the byproduct of mining and mineral processing, are increasingly mass produced as a result of increased demand for metals and minerals as well as the advancement in technology that allows for the exploitation of lower-grade ores. Lower grades can increase the volume of tailings that may contain new gangue minerals …
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In Vietnam, there are many technological research projects on iron ore beneficiation and processing. The main technologies are washing and scrubbing methods, magnetizing …
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— Iron ore tailings (IOTs) are a byproduct of the iron ore beneficiation process and are a significant source of solid waste [13, 14].In China alone, an astounding 600 million tons of IOTs are produced annually, yet the utilization rate remains shockingly low at only 7% [14].The high demand for iron production has led to an increased disposal of …
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