Repurposing mine tailings: Cold bonding of siliceous iron ore tailings …
The compressive strengths of the tailings pellets were shown to increase with time in the curing vessel, closely approaching the 400 lbf of standard iron ore concentrate pellets. These strengths are sufficient to allow use of the tailings pellets as aggregate materials for asphalt and cement.
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Recovery of iron from copper tailings via low …
dosage of 2.5%, a magnetic field intensity of 100 mT, and a grinding time of 1 min. Under these conditions, the iron grade in the magnetic concentrate was greater than 90%, with an iron recovery ratio greater than 95%. Keywords: copper tailings; iron; direct reduction; magnetic separation; recovery; process optimization 1. Introduction
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Carbothermal reduction followed by sulfuric acid
Carbothermal reduction followed by sulfuric acid leaching of Bayan Obo tailings for selective concentration of iron and rare earth metals. Author links open overlay panel Yan Zhou, Jianxing Liu ... CO and H 2 in a ratio of 1:3, 20% concentration, and a product grind size below 38 μm with 95% content, an iron concentrate achieved 65.56% …
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Volt Carbon Technologies Enhances Dry Tailings Byproducts …
The results of X-ray Defraction, Inductively Coupled Plasma and Thermogravimetric analysis, championed by Dr. Yu's team, revealed that the Iron concentrate measured at 61.5% iron, demonstrating ...
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Chromium and iron recovery from hazardous extracted vanadium tailings
After magnetic separation, the iron-rich material in the magnetic concentrate with a low total iron content has a low utilization value. Furthermore, the magnetic tailings still contain significant levels of alkali metals, which pose a serious environmental contamination issue that has not been fully resolved yet [19].
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Mineral Magnetic Modification of Fine Iron Ore Tailings and …
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 …
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Minerals | Free Full-Text | Recovering Iron from Iron Ore …
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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Separation of Iron and Rare Earths from Low‐Intensity …
The results revealed that an iron concentrate having an iron grade of 66.51% and iron recovery of 72.90% could be obtained under the following conditions: roasting temperature of 470 • C ...
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Recovery of Iron from Copper Tailings Using a Combined
Iron in the form of fayalite in copper tailings poses a challenge for traditional beneficiation methods due to its fine particle size. In this work, iron present in copper tailings was efficiently recovered by reducing fayalite to metallic iron and subsequently separating it from gangue using the low-intensity magnetic separation.
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(PDF) Iron Ore Tailings as Partial Replacement for Fine …
Iron ore tailings (IOTs) are a form of solid waste produced during the beneficiation process of iron ore concentrate [7], and have been used by many researchers as a replacement for fine aggregate in concrete production [8][9][10][11], [12][13]–[16] This paper is about the review of various research works on the nature of IOT and its effects ...
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Stabilization of iron ore tailings with cement and bentonite: …
Iron ore tailings. A number of representative iron ore tailing samples were acquired from different locations of the dry tailing disposal areas (cf. Fig. 2).As illustrated in Fig. 3, the tailings were loosely dumped as piles; thus, their sampling did not necessitate any particular practice and merely involved filling bags with a hand shovel.A total number …
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Recovery of magnetite-hematite concentrate from iron ore tailings
The separation technology provides for production of iron ore concentrate with total iron content of 65.9% and recovers 91.0% of magnetite and 80.5% of hematite from the tailings containing 20.4% ...
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Efficient iron recovery from iron tailings using advanced …
Iron tailings have been successfully employed as a material for buildings (Han et al., 2019, ... Applying our SRMS technology, we were able to obtain qualified iron concentrate with a 67.09% Fe grade and achieved an 85.93% iron recovery (Fig. 2), while the Fe grade of the final tailings produced was only 2.33% (Yanjun et al., 2020). This ...
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Iron Ore Tailing Beneficiation – a Potential Resource for Future
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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Recovering Iron Concentrate from Low-Grade Siderite …
Refractory iron ore is often discarded as tailings. This causes a great waste of iron resources. In this paper, the flash roasting-magnetic separation process was …
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Iron Ore Tailings Filtration – Dewater Filter Press
The Iron ore mine of this case study, produces magnetite iron ore concentrate and the iron ore tailings are mainly produced after the magnetic separation process. Then the tailings slurry will be thickened by a high rate thickener. The goal of this iron ore tailings project was to dewater the iron ore tailings as much as possible in order to ...
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Characterisation and magnetic concentration of an iron ore tailings …
Fig. 1 shows the particle-size distribution of the iron ore jigging tailings sample and the concentration feed sample (grinding/classification at 1.4 mm). As observed, the d 80 of the tailings sample is approximately 4000 μm (4 mm) with only 4% of the particles below 37 μm (0.037 mm). The d 80 of the concentration feed sample is 840 μm …
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Technological research on converting iron ore tailings into a …
The iron concentrate was pelletized in a laboratory-scale pelletizer. Each technology has been assessed with regard to the mass yield of iron concentrate, the iron recovery. and the iron, lead, and zinc content in order to identify the most effective route. Keywords: tailings reprocessing, magnetizing roasting, pelletization.
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Novel method for iron recovery from hazardous iron ore
The iron concentrate, which can serve as raw material in iron production, was 73.86% with low content of harmful impurities. ... Yang CM, Cui C, Qin J (2015) Recycling of low-silicon iron tailings in the production of lightweight aggregates. Ceram Int 41:1213–1221. Article CAS Google Scholar Yu Y, Qi C (2011) Magnetizing roasting …
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Efficient enrichment of iron concentrate from iron tailings via
A concentrate with the highest iron grade of 61.79% and yield of 52.15% was produced from magnetic upgradation of the Rougher tailings, but magnetic …
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Iron ore tailings valorization through separate
A concentrate with the highest iron grade of 61.79% and yield of 52.15% was produced from magnetic upgradation of the Rougher tailings, but magnetic …
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Acidithiobacillus ferrooxidans and mixed Acidophilic …
However, a large number of tailings with high sulfur content are exposed to the air, which is harmful to the environment and violates the concept of energy conservation and emission reduction [5]. ... The iron concentrate was crushed and sieved to obtain powders of < 100 µm in size. Twenty-one 5 g mineral samples were weighed and …
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Efficient enrichment of iron concentrate from iron tailings via
Iron ore tailings are industrial solid wastes generated from mineral processing. The disposal of iron ore tailings leads to environmental threat and serious …
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Cyanide detoxification and iron mineral recycle of cyanide tailings …
The reduction roasting realized the main mineral hematite transformed to magnetite and recycled the iron concentrate from the cyanide tailings with iron grade of 59.21% and iron recovery of 89.57%. ... The Optimum iron concentrate recycle process parameters were obtained as following: reduction temperature of 560 ℃, CO …
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Enhancement effect and mechanism of iron tailings powder …
The development of iron and steel industry requires the exploitation of a large number of iron ore resources. While producing iron concentrate powder on demand, a large number of eliminated tailings will be produced [1, 2].According to statistics, 2.5–3 tons of tailings will be produced for each ton of iron concentrate powder screened on average.
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Producing magnetite concentrate from iron tailings via …
The results showed that an iron concentrate with iron grade of 63.04% and total iron recovery of 48.40% was obtained under the optimum roasting conditions: feeding rate of 111.70 kg/h, roasting ...
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Recovery of iron from copper tailings via low-temperature …
In some studies, the iron recycling ratio can be greater than 95% and after the iron recycling, the iron grade in the magnetic concentrate is greater than 90% [7] [8][9][10]. In addition, some ...
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A critical review on metallurgical recovery of iron from iron ore tailings
Fig. 2 illustrates the iron ore beneficiation process, particularly magnetic separation, resulting in the generation of inevitable tailings. Due to the characteristics of iron ores and the conditions during beneficiation, it is inevitable that approximately 2.5–3 tons of IOTs are generated for every 1 ton of iron ore concentrate produced [7].In 2019, the global annual …
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Iron Ore Tailing Beneficiation
In this process, the tailings is effectively processed with vertical pulsating high gradient magnetic separator to produce a relatively high-grade iron concentrate. 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
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A new approach for recovering iron from iron ore tailings …
The results showed that an iron concentrate with iron grade of 63.04% and total iron recovery of 48.40% was obtained under the optimum roasting conditions: feeding rate of 111.70 kg/h, roasting ...
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