No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
This study is mainly focused on the substitution of Iron ore tailings (IOTs) as a partial replacement of sand and sugarcane bagasse ash as a partial replacement of cement. After the mineral processing of Iron ore, the waste is generated, which arise many environmental issues for both living and nonliving components. ... The weight loss is found ...
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 similar to natural silicate …
Based on the background that large amount of iron ore tailings are stockpiled in China, the utilization of iron ore tailings to prepare sintering brick was studied. The main objective of this paper was to investigate the influence of sintering temperature on sintering bricks from iron ore tailings, in the presence of clay, coal refuses and bentonite. Sintering bricks were prepared …
After adding iron ore tailings to concrete, more slurry was required to pad the architecture, thereby causing the tailing mixes' compressive strength at 7 d to become lower than that of the control mix. ... Results show that the mass loss of concrete containing 35% iron ore tailings is higher than that of the reference concrete. The frost ...
In this study, a pilot-scale experiment on the iron recovery from iron ore tailings was investigated using innovative technology of pre-concentration and suspension magnetization …
The preparation of iron ore tailings (IOTs) into supplementary cementitious materials (SCMs) is an effective approach to achieve value-added utilization of industrial solid waste. This study systematically investigates the hydration pattern and strength development of Portland cement systems with the incorporation of IOTs, steel slag (SS), granulated blast-furnace slag …
On January 25, 2019, the tailings dam at the Córrego do Feijão iron ore mine near Brumadinho, Brazil (at the arrow) collapsed, causing a wave of toxic mud to flow downstream, killing 237 people and destroying 269.84 hm 2 of land in one of the deadliest tailings dam disasters in history . On November 5, 2015, the second of three consecutive ...
The need for low-cost raw materials is driven by the fact that iron ore tailings, a prevalent kind of hazardous solid waste, have created major environmental issues. Although many studies have focused on using iron ore tailing (IOT) in concrete and have reported positive results, readers may find it difficult to accurately assess the behaviors of IOT in concrete due …
The dumping of IOT may result in loss of vegetation, pollution of topsoil, creating overburden load, deforestation, soil erosion, water and air pollution and other hazards to human population. ... H. R. Arjun and George Ignatius, "Utilization of Iron Ore Tailings for the Production of Fly Ash | GGBS-Based Geopolymer Bricks" Journal of ...
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 magnetizing roasting …
The common ways of comprehensive recovery and utilization of iron tailings resources at present are described in detail from five aspects: In terms of the recovering valuable elements, the …
Samples of Itakpe Iron Ore waste dump (tailings) were collected using random sampling method from different locations at the tailings dump sites of National Iron Ore Mining Company (NIOMCO) in Itakpe, Kogi State, Nigeria and properly homogenized to give the head sample. ... 23.61% SiO2, 10.28% Al2O3, 6.09% alkalies and 7.70 % Loss on Ignition ...
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
The experimental results highlight the particular features of the behavior of iron ore tailings and emphasize the potentially promising combination of high shear resistance and …
The plot illustrates that iron ore tailings exhibit a heterogeneous nature, as the data points are widely distributed on both the horizontal and vertical axes. This distribution spans both plastic and non-plastic behavior areas, …
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 were prepared from high-silica …
Samples of IOT and iron ore tailings after leaching and thermal treatment (L-IOT) were physically and chemically characterised. The particle size distribution was obtained by laser diffraction (CILAS 1180). Elemental analysis was carried out by X-ray fluorescence - XRF (Rigaku - RIX 2000) and determination of crystalline species by X-ray ...
An evaluation of iron ore tailings characteristics and iron ore tailings concrete properties. Author links open overlay panel Jiangshan Zhao a, Kun Ni b, Youpo Su a, Yunxing Shi b. Show more. Add to Mendeley ... Weight loss: less than 5% after 75 cycles Dynamic modulus of elasticity:more than 60% after 50 cycles (10%, 20%, 40% IOT), more than ...
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 granular material. This paper presents the …
It was concluded that this novel process may be effectively used to recover iron values from low-grade hematite tailings. Key Words: Iron ore slime, Fe Recovery, HGMS,Yield & Noamundi. ... hydrocylone overflow, which is 16% of ROM considered as a tailing, can be processed through HGMS to reduce the slime loss and recover iron value from slime.
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. ... respectively. For IOTs, the weight loss (0.89%) observed in the temperature range of 30.00–521.87 ...
This article aims to investigate the direct reuse effect of process water containing residual amine from tailings and concentrate pulps on the performance of the cationic reverse …
It also provides economic and social benefits in addition to the environmental benefits. iron ore tailings is one such industrial waste that is the by-product of iron ore beneficiation process ...
Frost resistance of iron ore tailings recycled aggregate concrete is revealed from the macro- and microangles to provide a theoretical foundation for the large-scale application of iron ore tailings recycled aggregate concrete in the high altitude and cold regions of the world. 2. Specimen Preparation and Experimental Design 2.1. Materials
In iron ore processing plants, different tailing streams are usually transferred to the tailings thickener for partial dewatering and finally transferred to the tailings dam as a single …
The iron ore tailings (IOT) studied herein are from Quadrilátero Ferrífero (QF), in the central region of the state of Minas Gerais in Brazil. This region produces approximately 200 million tons of iron ore per year and is responsible for …
Iron tailings, generated from the beneficiation and metallurgy of iron ore, are hazardous wastes that pose significant environmental challenges due to their large-scale disordered storage, resulting in widespread damage and safety concerns [1], [2].The annual worldwide deposition of over 10 billion tons of iron tailings in tailings dams has made it …
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.
In the iron-tailings-based cementitious mortars prepared in this work, the optimal incorporation rate of graphite ore as a supplementary cementitious material was 4 wt%. ... and K 2 O, among which the SiO 2 content was 55.27% and the loss on ignition was 11.76%. The ore contained a typical nonmetallic graphite composition with a C content of 7. ...
Iron ore tailings: Non-hydrothermal ... Over the range of 30–1100 °C, the weight loss rate of iron tailings was only 3%. The as-synthesized sample had two weightlessness stages with a total weight loss of about 61.1%. Two weightlessness stages occurred at 30–164 °C and 164–1100 °C, respectively.
