Iron ore tailings (IOTs) are an inevitable by-product produced during the beneficiation process of iron ore (Almeida et al., 2023). The rapid growth of mineral mining and ferrous metallurgy has led to an increase in the generation of IOTs. ... The weight loss in the temperature range of 521.87–742.43 °C (2.12%) with an endothermic peak at ...
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by Sarah Sax on 21 February 2024. In 2019, the collapse of an iron-ore tailings dam in Brumadinho, southeastern Brazil, killed 272 people, flattened entire villages, and caused widespread ...
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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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Iron ore tailings (IOTs) are the industrious solid waste discharged by concentrating mills after processing iron ores and selecting "valuable …
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Iron Ore Tailings Pile and collection for research. By the literature studied, the active agent adopted was 85% commercial phosphoric acid [32], [46], [71], [73], with a molar mass of 98 g/mol, a density of 1.685 g/ml, and a molar concentration of 14.6148 mol/L. Deionized water was adopted for acid dilution [32] .
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Arbuscular mycorrhizal (AM) fungi play an important role in organic matter (OM) stabilization in Fe ore tailings for eco-engineered soil formation. However, little has been understood about the AM fungi-derived organic signature and organo-mineral interactions in situ at the submicron scale. In this study, a compartmentalized cultivation system was used to …
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The iron ore in China is characterized as "poor, fine and complicated," with the limitation of beneficiation technology leading to the loss of some iron minerals in the …
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On September 5, 2008, a tremendous iron-ore mine tailings dam break accident occurred in Shanxi Province, China, causing 277 deaths and $14.59 million in economic losses [7, 8]. On January 25, 2019, 235 people were killed and 35 people went missing (data from the Minas Gerais Fire Department, May 4, 2019) after an iron-ore …
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Utilizing iron ore mining wastes like dump fines, slimes, and tailings, which contain significant iron values, is essential to meet future needs and environmental …
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This detailed mineralogical insight is essential for explaining the observed variations in iron content within the tailings which are directly linked to the mineral composition of processed iron ore. In recent decades, as high-grade iron ores become …
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Figure 1 (a-d) illustrates the iron ore waste and cementitious precursor materials under study. Iron ore tailings (IOTs) were obtained from the Ferric Quadrangle located in the province of Minas Gerais, Brazil. IOTs are classified as SM according to the Unified Soil Classification System (USCS) [34].The main physical properties and grain …
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Standard sands (SS) and iron ore tailings sands (IOT) were used as the fine aggregates. The SS was produced by Xiamen ISO Standard Sand Co., Ltd. and the main quality indexes are listed in Table 2.It shows that the content of SiO 2 exceeds 98 % for the SS. The SS was dried by a drying oven (Subo, 101-00SB) at 105 °C for 24 h until …
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China's iron ore consumption accounts for 60% of the global total. According to the Annual Report on the Prevention and Control of Environmental Pollution by Solid Wastes in Large and Medium-sized Cities in 2020 [1], the output of Iron ore tailings (IOT) is 440 million tons, while the comprehensive utilization rate is only 23.4%. Huge …
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Guangyan Tian, Lijuan Wang & Jinsheng Liang. 890 Accesses. 8 Citations. Explore all metrics. Abstract. Iron ore tailing is a major solid waste requiring advanced recycling …
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1. Introduction. Iron ore tailings (IOTs) are solid wastes after beneficiation [1], accounting for nearly 1/3 of the total tailings [2].It is reported that the recycling utilization rate of IOTs is only 7% [3].A large amount of IOTs are stored in tailings dams, which increases the cost of land occupation and leads to environmental degradation …
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Globally, mining operators focus increasingly on tailings filtration to recover process water and store tailings more safely. Generally, required water contents below 20-w% are reached by using filter presses. To maintain high efficiency, complete cake detachment is needed because incomplete discharge reduces plant performance. …
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Iron Ore Tailings (IOT) are the waste slag resulted from iron ore mines. Large amount of Iron Ore Tailings (IOT) have been generating every year posing serious environmental problems, large production of cement everyday resulting the emission of CO 2 and increase in the consumption of river sand for construction activities making the river beds ...
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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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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 …
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1. Introduction. Iron ore is one of the most common resource widely used in industry while the tailings discarded during the beneficiation and smelting process of iron ore become an important hazardous waste worldwide [1], [2].In China and Brazil, more than 10 billion tons of iron ore tailings have been discharged as waste and normally deposit …
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The results of investigation indicate that this novel process is capable of producing an iron concentrate assaying ~ 60% Fe and ~3.25% alumina with a yield of ~55 % on weight basis and recover > 65 % iron bearing particles from the tailings. More importantly, the corresponding tail contained ~45% Fe.
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A pilot-scale experiment on iron recovery from iron ore tailings using pre-concentration and then SMR followed by magnetic separation and flotation was …
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Iron ore tailing/slime (-150 μm) is produced after scrubbing and wet screening of a low-grade iron ore. Tailing beneficiation of iron ore has been addressed either by flotation or wet high intensity high gradient separation. The present study aims to recover iron values from discarded slime containing assay ~56% Fe, ~6.5% SiO 2, and ~7.0% Al 2 O 3
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After 3 years of the Mariana tragedy, on 25th January 2019, another mining dam consisting of iron ore tailings failed catastrophically in the Brumadinho city, Minas Gerais State, Brazil. The rupture produced more than 11 × 10 6 m 3 of mining waste – equivalent to a 10-m high wave of mud that spread 10 km the downhill – that reached the ...
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Introduction: In our study, various test methods were adopted to explore the mineralogical characteristics, grindability, particle morphology, particle size distribution, and environmental leaching …
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Yu Chen, Xiaodong Pan, Yongping Xie & Suqin Li. 55 Accesses. Explore all metrics. Abstract. Iron ore tailings (IOTs) are an important solid waste in the mining …
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For example, the content of SiO 2 in phosphate tailings is 2.1, in contrast to the 75.23 in iron ore tailings. Even if there were all lead-zinc tailings or iron ore tailings, the variation content of SiO 2 is 15.50-69.92 in the lead-zinc tailings or 24.19-75.23 in the iron ore tailings. As a result, if tailings are only classified according to ...
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The results also showed that the mass loss of 40% iron ore tailings was lowest and further illustrated that its frost resistance was the best. 3.2. Analysis of Compressive Strength Loss. Compressive strength loss of concrete with different iron ore tailings replacement rates after freezing-thawing cycles is shown in Table 6 and Figure 4.
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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 …
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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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