Iron tailings are generated as waste in large quantities during mining activities. In 2020, China produced 1.295 billion tons of tailings, with a recycling rate of only 34 % [1].Iron tailings have the potential to be used as fine aggregates because they are relatively inert [2].When iron tailings are used to replace natural sand in concrete, the compressive strength first increases with small ...
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1. Introduction. Tailings are one of the largest solid wastes in the world, which are widely distributed all over the world. Iron tailings are waste residue discharged from iron ore after beneficiation process, but there is still a lot of space for these solid wastes to be utilized [1, 2].The comprehensive utilization rate of tailings is not high, which is limited by the development of ...
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The stress characteristics of modified iron tailings under traffic loads are under-investigated, and few scholars have extracted the dynamic response law of soil under the coupling effect of principal stress rotation and stress amplitude change from the research results of soil dynamic response. In this paper, polypropylene fibers and cement to ...
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The characterization includes various aspects of behavior that are relevant to different types of use as a building material, including physical and identification properties, compaction behavior and stress–strain properties …
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Therefore, using iron tailings as roadbed materials for backfilling is an important way to recycle iron tailings. However, the engineering properties of iron tailings still do not meet the application specifications of practical engineering, and it needs to be modified by adding a curing agent [4], [5], [6].
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Iron tailings are abundant and predominantly comprise SiO 2 and Al 2 O 3, rendering them suitable for the structural frameworks of ceramsite [15]. Furthermore, iron tailings possess a notable concentration of metal oxides, allowing them to serve as co-solvents during the sintering process [16]. However, the utilization of a singular raw ...
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Hydration characteristics investigation of iron tailings blended ultra high performance concrete: The effects of mechanical activation and iron tailings content Author links open overlay panel Xiaowei Gu a, Weifeng Zhang a, Xinlong Zhang b c, Xiaohui Li a, Jingping Qiu a
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Iron ore tailings are commonly discarded in the wet state (i.e. mixed with water), and hydraulically deposited in tailings dams/dykes [3], although dumping is also practiced for dewatered and semi-dry tailings [3], [4], [5].Owing to the lack of knowledge regarding the complex geo-mechanical behavior of tailing materials, and the poor design, construction and monitoring …
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Cement and ionic curing agent were blended with iron tailings (ITS) and natural soil to prepare a new road base material. 7-d unconfined compressive strength (UCS) was selected as the evaluation index for determining the optimal mix ratio. The results reveal that the 7-d UCS always increases with the increase of cement content, and firstly increases with the …
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The permeability characteristics of iron tailings are one of the important factors affecting the stability of the tailings dam. The permeability properties of undisturbed iron tailings and ...
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Vanadium-titanium iron ore tailings (VTIOT) is solid industrial waste produced during the beneficiation process of vanadium-titanium magnetite (VTM) [1], [2], which has been stockpiled in huge quantities in China [3], [4], with cumulative stockpiles exceeding 7.5 billion tons [5], not only occupying a large amount of land, but also causing serious environmental …
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Moreover, the incorporation of finely ground iron tailings, especially ultrafine iron ore tailings (UIOT), in cementitious systems has been shown to enhance material properties through various mechanisms, including filling, nucleation, and pozzolanic effects [[24], [25], [26]]. Given the potential synergistic interactions between UIOT, PG, and ...
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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...
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In order to study the effect of temperature on the settling characteristics of overflow ultra-fine iron tailings, the settling velocity of overflow ultra-fine iron tailings at eight different temperatures at 10–80 °C was experimentally studied. The results show that, with the increase in slurry temperature, the flocculation settling velocity of overflow ultra-fine iron …
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In our study, various test methods were adopted to explore the mineralogical characteristics, grindability, particle morphology, particle size distribution, and environmental leaching toxicity of...
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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 …
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Iron tailings can be classified into three categories based on particle sizes: (1) iron tailings rock, produced by mechanical crushing of low-grade ore and wall rock, with a granulometry exceeding 4.75 mm and serving as coarse aggregates; (2) iron tailings sand, resulting from grinding and filtering of iron ore, with particle sizes ranging from ...
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With the rapid development of the iron and steel industry, a large amount of iron ore tailings are generated each year. According to statistic in the year 2006, in China, the amount of all tailings, which had been discarded and stacked, was estimated to be 59.7 billion tons, out of which approximately one third of the total tailings are due to the iron tailings, but there are still …
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The S2 tailings have a fines content (FC) of 33.3% and a specific weight (G s) of 2.97. This feature is associated with the process of iron ore beneficiation for the different tailings. When there are more fines in the tailings, iron recovery becomes more difficult and consequently, the iron content and specific weight of this material will be ...
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However, the hydration characteristics of ITP were still inferior to that of cement, making it difficult to eliminate the dilution effect caused by substituting cement with iron tailings [15]. In reality, the dilution effect actually increases the effective water-to-cement ratio, disrupts the pore structure, enhances porosity, and reduces the ...
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Red mud and iron tailings are representative solid wastes in China, which have caused serious environmental pollution and potential harmful risk to people. Based on the alkali characteristic of Bayer red mud and natural fine-grained feature of iron tailings, ...
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resources, iron ore mining in China discharges nearly 300 million tons of iron tailings (ITS) annually, such that a large amount of these can only be piled up in the form of tailings ponds. Presently, the utilization rate of ITS resources in China is only about 50% [2,3]. The
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Resource utilization of iron tailings powder is an effective measure to reduce the dam-break risk of an iron tailings reservoir. Adding polypropylene fiber to iron tailings powder can improve its shear performance. Direct shear tests were carried out on reinforced iron tailings powder with polypropylene fiber with dosages of 0%, 0.25%, 0.5%, 0.75%, and 1%, respectively. The …
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Experimental Analysis on Permeability Characteristics of Iron Tailings DeqingGan,XiYang,andYunpengZhang ... percentage of iron tailings less than a particle size (%) 100 particle size (mm) point 1/FC21.45% point 2/FC25.17% point 3/FC28.55% point …
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For further reading on comprehensive tailings management approaches, visit our page on mine tailings management.. Understanding and implementing these strategies can make a significant difference in the management of iron ore tailings, ensuring compliance with environmental and safety standards while promoting sustainable mining practices.
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Iron tailings are one of the products of iron ore sorting operations. The stacking of tailings not only a ects the surrounding environment, but also seriously threatens the lives and property security ... characteristics, such as the calculation of slope safety factor, the constitutive relationship of geomaterials, ...
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According to GB/T 31288–2014 [27] and YB/T 4561–2016 [28], there are three types of IOT: iron tailings powder, iron tailings super fine sand, iron tailings fine sand. However, in most previous researches, IOT mainly covers three categories: (i) iron tailings rock, used as coarse aggregate, of particle size >4.75 mm, is produced by ...
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Tailings are the by-products of iron ore processing, resulting from the various stages of extraction and refinement. Initially, during crushing and grinding, large chunks of iron …
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The plasticity characteristics of the iron ore tailings tested, namely the plastic (w P) and liquid (w L) limits and the plasticity index (PI), were experimentally determined. The soil plastic limit was assessed through the soil …
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The aim of this paper was to explore the remediation effect and mechanism of Wetland pine (Pinus elliottii), Chinese fir (Cunninghamia lanceolata (Lamb.) Hook), and Alder (Alnus cremastogyne Burkill) on heavy metal contaminated soil in the iron tailings of Jiulong Iron Tailings Area. At the same time, the specificity of plant rhizosphere and non-rhizosphere soil …
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Stacked tailings have become increasingly popular in recent years as a more environmentally friendly option for tailings disposal. However, the design and assessment of stacked tailings present unique challenges due to their unprecedented heights and the wide range of factors that affect their behavior, including particle types and sizes, environmental and …
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This study investigates experimentally the cement stabilization of iron ore tailings from Chadormalu mine (Iran). The utilized IOT is distinctive as it retains both a finer gradation and higher amount of Fe 2 O 3 as compared to most iron ore tailings previously investigated. An extensive series of compaction, uniaxial compression, split tensile ...
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The utilisation of iron tailings as construction materials has notable social impacts beyond the environmental and economic benefits. ... Hydration characteristics investigation of iron tailings blended ultra high performance concrete: the effects of mechanical activation and iron tailings content. J. Build.
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