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The results show that the activation of iron ore tailings(IOT) can increase the specific surface area, improve the surface energy and activity, increase the degree of participation in hydration reaction, promote the formation of a large number of acicular ettringite and C-S-H gel, improve the pore structure of hydration products, and lead to …
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The addition of iron ore tailings influenced the properties of bricks such as reduction in firing linear shrinkage and compressive strength, increase in bulk density, water absorption, and porosity. ... Physical-chemical processes of sustainable construction materials structure formation with iron ore processing tailings and aluminum anodizing ...
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Tailings are the left-over materials from the processing of mined ore. They consist of ground rock, unrecoverable and uneconomic metals, chemicals, organic matter and effluent from the process used to extract the desired products from the ore. Tailings are stored in tailings storage facilities (TSFs).
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World is bestowed with self-sufficient magnetite and hematite iron ores. Huge volume of mining waste, namely iron ore tailings (IOT), is generated during processing of iron ore, leading to environmental concerns. At the same time, due to excessive usage and environmental regulations, there is scarcity of naturally available …
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In September 2008, 277 people died in an accident caused by iron ore tailings release from a dam break in Shanxi Province, China . Similar to waste rocks dumps, tailings may generate AMD and, apart from the catastrophic failure of dam walls, may pose chronic environmental and human health issues due to the dispersion of …
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This research has highlighted the possibility of introducing alternative and cheaper materials as aggregates for concrete technology. ... Sustainable handling of iron ore tailings is of prime concern to all stakeholders who are into iron ore mining. ... The iron ore tailings aggregates concrete exhibited a good mechanical strength and even in ...
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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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Iron ore tailings can be recycled as functional materials because these tailings are similar to natural silicate minerals. Here, we review the conversion iron ore tailings into …
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The high‑silicon IOTs used in this experiment were provided by a mineral processing plant in northern China. The samples were dried and then grounded to 45 μm, and their chemical compositions measured by XFR were summarized in Table 1.The sulfuric acid (H 2 SO 4), hydrochloric acid (HCl), and hydrofluoric acid (HF) used in this …
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Our expertise extends to conveying, stockpiling and stacking; loading and unloading; shiploading; and sampling systems. Add in our advanced knowledge of iron-ore processing, ore behavior, and modeling design tools, and our clients get the most efficient and value-engineered bulk-materials handling solutions. Ore slurry, tailings, and water ...
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Iron ore tailings (IOTs) are a form of solid waste produced during the beneficiation process of iron ore concentrate. In this paper, iron recovery from IOTs was studied at different points during a process involving pre-concentration followed by direct reduction and magnetic separation. Then, slag-tailing concrete composite admixtures …
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Iron ore stands out as one of the main commodities in the global mining sector. Annually, an estimated production of around 2.4 billion tons of iron ore occurs worldwide (De Jesus and Joaquim 2020).In 2022, Brazil produced approximately 570 million tons of iron ore, generating 800 thousand direct jobs and 2 million indirect jobs, …
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methods many not be much effective for handling because ... iron ore tailings in the laboratory scale [10, 14, 16–19]. ... 2 Materials and Methods 2.1 Materials Iron ore used in the study was ...
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Iron ore tailing is a major solid waste requiring advanced recycling methods because ore tailing powder is polluting air and water resources. For instance, about 300 million tons of tailings are disposed yearly in 1229 iron ore tailings dams in the Hebei province in China. Iron ore tailings can be recycled as functional materials because these tailings are …
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This study evaluated the stabilization of iron ore tailings (IOTs) with an alkali-activated binder (AAB) produced from sugar cane bagasse ash, hydrated eggshell …
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Increasing population levels, growing economies, rapid urbanization and changes in consumption patterns have increased the demand for raw materials such as base and precious metals, leading to growing concerns regarding their availability and the global efficiency of the mine supply chain. Mine tailings, consisting of process effluents …
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An evaluation of the Itakpe iron ore tailings (IOT) for concrete production has been carried out using the material to replace sand and cement, in proportions of 5 % up to 30 %, and curing for periods 90 days in water. Characterization of the material showed that it has pozzolanic properties, and can be used as a retarder for hot-weather …
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The two prominent methods for mine wastes management or storage are dams and dumps, according to Blight [].Mine tailing impoundments and dam failures are very common, and many literatures have reported this [13, 14] as a cause due to the geotechnical behaviour of tailings.The Fundao dam failure in 2015 [], Brumadinho dam disaster at Corrego do …
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engineer long distance iron ore transportation by pipeline; design and deliver bulk materials handling systems and infrastructure specific to iron ore; develop designs for beneficiation by size, magnetic separation and / or flotation; develop geotechnical and tailings storage solutions for iron ore
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Iron tailings, a type of refractory iron ores, pose a challenge for effective iron recovery due to the complex mineral combinations and liberation modes. In this study, …
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Although the flocculent dosage of 25 g/t is applicable to both tailings materials, additional dosage is required to improve the overflow quality of the future tailings. Figure 5 Current and future tailings dilution Technical and economic assessment of dry stack tailings alternatives for an iron ore project: a case study J de Guzman & R Neumann
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A TSF's purpose is to receive deposits of tailings and allow water to separate from the fine waste particles – either naturally or through a mechanised process – so that the water can be recycled back into …
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account for variability in ore properties and processing. Develop and document a breach analysis for the tailings facility using a ... impacts to reflect a material change either to the tailings facility or to the social, environmental and …
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Introduction. Billions of tons of mine tailings are generated annually from extracting and processing of metal and mineral ores, 1, 2, 3 stockpiled in about 4,800 mine tailings storage facilities (TSFs), 4 occupying >240,000 ha of land worldwide. 4 Iron (Fe) ore tailings are one of the most challenging global tailings liability, 5 with over 1.4 …
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Here, we review the conversion iron ore tailings into functional materials by different technologies. Functional materials include magnetic nanoparticles made of zero-valent iron or iron oxide, and nanoporous materials such as silica or zeolite. We present applications to the removal of water, air and soil contaminants, by physical, chemical ...
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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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However, tailings management has been a major challenge for the industry for some time now [3]. Storage in tailings ponds has been increasingly replaced by dry storage (dry stacked tailings) due to …
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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 …
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DOI: 10.1016/j.jclepro.2020.123260 Corpus ID: 224863954; Iron ore tailings as a supplementary cementitious material in the production of pigmented cements @article{Magalhes2020IronOT, title={Iron ore tailings as a supplementary cementitious material in the production of pigmented cements}, author={Luciano Fernandes de …
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Iron ore tailings (IOT), the predominant solid by-products of iron ore mining and refining, present significant environmental challenges due to their sheer volume. This paper endeavors to scrutinize the prospective deployment of IOT as an alternative to soft soil in the fabrication of controlled low strength materials (CLSM) for backfill ...
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