Pumping system design challenges for high-density iron ore tailings …
2008. The shift from pumping low-concentration Newtonian fluid tailings suspensions to disposal to the production of non-Newtonian paste and thickened tailings has meant that the minerals and energy industries have had to learn how to handle (dewater, pump, …
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Preparation and alkali excitation mechanism of coal gangue-iron …
The iron ore tailings (IOT) had a particle size range of 0–0.63 mm, and Class I fly ash (FA) was utilized. The main chemical compositions of CG, IOT, and fly ash are summarized in Table 1. NaOH was obtained in ... The test results for cylinder compression strength, bulk density, 1 h water absorption, and strength after water absorption of ...
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Effects of constructing farmland with large amounts of iron tailings …
The reason is that although the bulk density of iron tailings (1.53 g·cm −3) is higher than that of regional stripped topsoil (1.39 or 1.41 g·cm −3) ...
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Influence of initial compaction and confining pressure …
The hydraulic conductivity of iron tailings is an important factor affecting the stability of tailings storage facilities. ... 94, and 101% of optimum dry density as determined by the standard Proctor method. These specimens were saturated and then consolidated with different confining pressure. It is possible to affirm that the increased ...
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Characterization of an Iron Ore Tailing Sample and …
Comparing the properties of different tailings generated in the QF helps identify patterns and ranges of variation, which can be used to analyse iron ore tailings from the same formation and with similar physical characteristics.
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Mechanical properties and enhancement mechanism of iron ore tailings …
Iron ore tailings (IOT), as one of the main mining wastes, is produced after multiple crushing and magnetic separation on iron ore [15].In China, stored IOT has reached 5 billion tons and is growing steadily at a rate of over 0.3 billion tons per year, whereas only 20 % of them has been reused [16].IOT that have not been effectively utilized are often stored in …
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Effect of ionic soil stabilizer on the properties of lime and fly …
The solid waste of iron tailings was produced about 2.5–3.5 billion tons annually in the world [1].The open-air stacking of iron tailings ponds occupies land resources and contributes to environmental pollution, resulting in significant annual monitoring and maintenance costs [2], [3].To reduce the negative impacts of iron tailings, recycling this solid waste has been a …
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Application of Iron Tailing Sand in Pavement Base …
The optimal moisture content, maximum dry density and compressive strength of iron tailings cement stable macadam are evaluated by using the compaction test and unconfined compressive test.
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Iron Ore Tailings: Characterization and …
Currently, approximately 1.4 billion tons per year of iron ore tailing wastes (IOT) are generated, mainly in Australia, Brazil, and China. This work describes the characterization and...
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Mechanics of an Iron Ore Tailings Exhibiting Transitional …
The test samples comprised of fine-grained material having similar proportions of silts and clays of low plasticity. The iron ore tailings have a specific gravity of 3.71 and an …
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Evaluation of the Calibration Curve of Water Content Sensors in Iron
The higher density observed in iron ore tailings is directly related to the higher percentage of iron, which, in turn, has higher dielectric constants. In this context, the following equation was obtained by clicking the rate of iron in each sample. Regardless of density, all experimental data can be predicted by the equation 5 with an accuracy ...
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Experimental Study on Physical and Mechanical Properties of …
In this paper, a series of laboratory experiments were conducted to investigate the physical and mechanical properties of iron tailings obtained from Daxigou iron mine in Shanxi …
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Utilization of iron tailings as aggregates in paving asphalt …
In the compositions of iron tailings, the density of laumontite is low relatively. Additionally, clinochlore possesses a perfect cleavage, which causes the materials to be easily broken along the cleavage plane under the external force, thereby forming the flat particles. For the basalt, its main mineral components, such as anorthite and ...
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Compressive strength, durability, and resilient modulus of …
The typical approach involves disposing of these materials in a slurry form, with low solid content and high moisture, and storing them in structures called tailings dams [11].Indeed, rare incidents like the failures of tailing dams can have severe repercussions, as evidenced by the devastating outcomes of Mariana and Brumadinho failures in 2015 and 2019 …
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Influence of Iron Tailings Powder on the Performance of …
Influence of Iron Tailings Powder on the Performance of Alkali Slag ed Concrete Wenlu Ren1, a, Yuze Tian1, ... For the alkali slag ed concrete with an apparent density of 700 g/cm3, the ratio of iron tailing powder and slag powder was changed under the condition that the cement content was
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Geotechnical Properties of Mine Tailings | Journal of …
The engineering properties of tailings are important for the safety evaluation and engineering design of tailing dams. In the present study, laboratory experiments were performed to investigate the geotechnical properties of four different tailings, including two iron tailings (coarse and fine) and two copper tailings (coarse and fine).
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Mechanical behaviour of Panzhihua iron tailings
However, recent advances have highlighted a so-called "transitional" behaviour in which the location of the normal compression line (NCL) and CSL is a function of the density of the soils at deposition. This paper presents a detailed investigation of the mechanics of tailings taken from three locations of an iron tailings impoundment.
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Preparation and alkali excitation mechanism of coal gangue-iron …
The iron ore tailings (IOT) had a particle size range of 0–0.63 mm, and Class I fly ash (FA) was utilized. The main chemical ... of non-sintering ceramsite, followed by fly ash doping, while AP doping has a relatively smaller impact. The bulk density increases and then decreases with the increase in NaOH dosage, reaching its lowest point at a ...
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Investigation of the Mechanical Properties of Iron Tailings …
1. Introduction. Iron tailings are among the significant by-products of mining operations and a major component of industrial solid waste. As the steel industry develops, the proportion of iron tailings in industrial solid waste has been continuously increasing [].The annual production of iron tailings in China exceeds 265 million tons, but the utilization rate is only …
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Iron Ore Tailings: Characterization and Applications
China generates 1.5 tons of iron ore tailings for each ton of iron ore concentrate.21,22 In this country, the annual production of iron ore tailings reaches about 180 million tons and is increasing.23 In India, between 10-12 million tons of iron ore tailings are extracted in the form of ultrafine waste.24 In Australia, it is estimated that ...
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Basic characteristics and environmental impact of iron ore …
Iron ore tailings (IOTs) are the indusus solid waste discharged by concentrating mills after processing iron ores and selecting "valuable components" (Yao et al., 2020). In …
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Maximizing the pozzolanic potential of superfine iron tailings …
Some iron tailings' disadvantages pose challenges in their reuse processes as backfill materials, especially for superfine tailings. With the development of ball-milling and magnetic separation technologies for ore treatment, the resulting iron tailings become very fine, even with the 5–75 μm size (Quast and Skinner, 2020).These superfine tailings will increase …
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Pilot Study of Soil Improvement Technology for Iron Tailings …
In this paper, the properties of iron tailings were optimized by replacing the natural soil with iron tailings and rice husk and organic fertilizer as the improvers, and the improvement effects of ...
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Towards prediction of cake detachment in tailings …
Table 1 Properties of the iron ore tailings (Fränkle et al. 2021) Iron ore tailings Solid density 3,050 kg·m-3 Slurry concentration 60 w-% Particle size distribution x10,3 7.2 µm x50,3 38.2 µm x90,3 120.8 µm Filtration tests were carried out with two filter media types typical for the application. A nylon cloth and
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Geotechnical Properties of Mine Tailings
The produced tailings were transported into a hydrocyclone sepa-ration facility, and two kinds of tailings were generated, i.e., coarse tailings from the bottom and fine tailings from the overflow of the hydrocyclone separation facility. The concentrations of the pro-duced coarse iron and fine iron tailings from the Yuhezhai iron
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Critical State Analysis for Iron Ore Tailings with a Fine …
The formation of layering during the sedimentation process of tailings makes it of great significance to investigate tailings and to analyze their susceptibility to flow liquefaction. …
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Utilization of high-sulfur iron ore tailings in cement mortar …
Utilization of high-sulfur iron ore tailings in cement mortar by considering the influence of curing temperature and tailing content. Author links open overlay panel Shibing Huang a b ... Then, the fresh mortar was poured into a density tester. The density tester full with the mortar was placed on the vibration machine for vibrating by 25 times
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Co-utilization of iron ore tailings and coal fly ash for porous
Conversely, the trends in the apparent density, bulk density, and comprehensive strength were opposite to that of the porosity, reaching their minimum values (1.26 g/cm 3, 0.57 g/cm 3, and 8.63 MPa, respectively) at 15 min, further confirming the correlation between the mechanical properties of the ceramsite and its porosity. Considering the ...
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The Experimental Characterization of Iron Ore …
The tailings tested can be described as low-plasticity silty sand materials with an average solids density of 4.7, a maximum dry unit weight close to 3 g/cm 3 and a higher angle of friction and liquefaction resistance than …
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PRIME PubMed | An overview of soil and plant assessment …
This sampling strategy targeted specific landscape positions including areas affected by deposited iron tailings (DIT), soil tailing mixture (STM), and control soil (CS) devoid of iron tailing interference. ... 2024/10/18/pubmed PY - 2024/10/18/entrez KW - Hematite KW - Soil CEC KW - Soil density KW - Soil organic matter KW - Soil porosity SP ...
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