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Flash reduction of magnetite concentrate related to a novel flash

A novel flash ironmaking technology is being developed at University of Utah aiming at producing iron directly from magnetite concentrate (< 100 μm) using natural gas in a flash suspension reactor in the temperature range 1150-1600 °C. Natural gas is partially oxidized with oxygen generating a reducing gas mixture of H2 and CO as well as the heat required for the reaction. …

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Magnetite Concentration Methods

Magnetite (composition Fe3O4) has a specific gravity ranging from 5.0 to 5.1, and is sufficiently heavy to permit of its concentration from gangue by specific-gravity methods, which have had an extensive application.

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Producing magnetite concentrate from iron tailings via suspension

The iron grade of the roasted feed ores was increased from 15.68% to 33.19% by pre-concentration process. Subsequently, the suspension magnetization roasting was performed to transform the weak magnetic minerals into magnetite, and magnetite concentrate was obtained via low-intensity magnetic separation.

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Processing of Magnetite Iron Ores–Comparing …

The effect of feed particle size, feed rate, roll rotation speed, induced magnetic field intensity, and separator knife angle on Fe grade and recovery of the magnetite concentrate were...

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Recovery of magnetite-hematite concentrate from iron ore …

product should be more than 50% to produce magnetite concentrate with Fe total content of about 68% (figure 5). Fig. 5. Dependence of -0.071 mm fraction content in the feed of second stage of magnetic separation on concentrate quality. So, combination of two stages of magnetic separation and milling allowed us to produce magnetite concentrate

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Process Mineralogical Analysis of a Typical Vanadium Titano-magnetite

Experimental Methods. To investigate the mineral phase composition, phase embedding characteristics, and distribution behavior of the main elements in a typical vanadium titano-magnetite concentrate, the VTM sample was mixed, divided, and sampled for XRD analysis, chemical phase analysis, optical microscopy analysis, and SEM-EDS analysis.

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Development of the Flash Ironmaking Technology (FIT) for Green

Process simulation and economic analysis on the new process [12-15] is also summarized. ... The solid fed to this reactor was as-received magnetite concentrate with a particle size range of

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Mechanism of magnetite iron ore concentrate morphology …

The effect and mechanism of magnetite concentrate morphology on the quality of indurated pellets were investigated. Concentrates with different morphologies were prepared using high-pressure ...

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Full article: Production of M-type strontium hexaferrite magnetic

The high-pure magnetite concentrate (HPMC) was studied for a substitution of iron scale to produce the magnetic powder of strontium hexaferrite via the conventional ceramic process in this work. The magnetic powder obtained under the optimum conditions had a magneto plumbite structure, which was confirmed by X-ray diffraction (XRD).

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Mechanism of magnetite iron ore concentrate morphology …

This study was performed to investigate the mechanism of the effect of the morphology of magnetite concentrate on the induration process and its effect on the quality of …

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Preparation of high-purity magnetite from iron ore concentrate

This study focuses on ordinary magnetite concentrate and utilizes a process combining magnetic separation, flotation, and leaching based on its mineralogical …

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Investigation of Vanadium Titanomagnetite Concentrate Activated

Test methods including chemical analysis, X-ray-phase, and thermogravimetric analyses together with thermodynamic calculation are adopted to reveal the transition mechanism for Fe, V and Ti in an activated reduction process. Ti in vanadium titanomagnetite concentrate is converted into Na2TiO3 at below 1150°С and then forms CaTiO3 by reduction as temperature …

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How to Recover Iron from Magnetite: 4 Methods and …

Through the above process, the magnetite processing plant can obtain more than 65% of high-quality iron ore concentrate, and the recovery rate is as high as 80%. Of course, the specific beneficiation process needs to be …

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Recovery of Fe and V via selective reduction–magnetic …

PDF | On Nov 18, 2021, Liwei Liu and others published Recovery of Fe and V via selective reduction–magnetic separation of vanadium-titanium magnetite concentrate | Find, read and cite all the ...

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Preparation of reduced iron powder for powder metallurgy from magnetite

The magnetite concentrate used in this study was collected from an ore dressing plant in China; its chemical composition is listed in Table 1. As can be seen from Table 1, the primary element was Fe, and the grade of iron was 64.86%, which is much lower than that of high-purity magnetite and iron scale. The predominant impurity was SiO 2. The ...

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Producing magnetite concentrate via self-magnetization roasting …

The magnetite concentrate with TFe of 66% and yield of 35% can be obtained by iron ore mud (TFe = 56.2%) with cow dung at 700 °C and 45 min [17]. Luo et al. studied fine iron ore containing specularite, limonite, and siderite by using fast reducing roasting techniques.

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Magnetic Concentrate

The process involved feeding the ash slurry through concentrating spirals which separated the ash into heavy and light fractions. ... magnetic separation is used as an initial cobbing step on the cyclone overflow of the ball mill discharge to remove magnetite. This magnetite concentrate is then combined with the tailings of spiral gravity ...

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Whyalla's GREENSTEEL journey starts with magnetite

GFG's mining arm, SIMEC Mining, is completing construction of the first of a two-phase de-bottlenecking process which will increase magnetite concentrate production to 2.5 Mtpa. This work marks an important step in GFG's journey to develop South Australia's vast magnetite resource to support its CN30 ambitions.

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Reduction of chengde vanadium titanium magnetite concentrate …

In this study, vanadium titanium magnetite concentrate (VTM), obtained after magnetic separation, was used in the Chengde area. The chemical composition and particle size of VTM are presented in Table 1 and Fig. 1, respectively.Scanning electron microscopy (SEM) analysis (Fig. 2 (a)–2(c)) shows that the VTM in this area is characterized by poor vanadium …

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Pelletization of hematite and synthesized magnetite concentrate from …

Iron ore concentrates have been generated utilizing the conventional beneficiation process and also by the approach of reduction roasting-magnetic separation. The Fe contents of the hematite and the synthesized magnetite concentrate …

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High-Efficiency Extraction of Fe, V, and Ti from Vanadium Titano

Vanadium-containing titanium magnetite is the main source of V and Ti in the internal market. About 75% Fe, 82% V, and 44% Ti pass into iron concentrate during ore enrichment [].Therefore, the question of how to improve comprehensive utilization of vanadium-titanium magnetite concentrate (VTMC) is of decisive importance for the vanadium and …

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Iron ore magnetite processing

Iron ore magnetite processing (LIMS, MIMS, WHIMS, Davis Tubes) The increased worldwide demand for steel in recent decades has led to an increase in the exploitation of magnetite iron ore deposits as an alternative to hematite …

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Green Magnetite Will Be the Future of Steelmaking

Outotec currently has two pilot operations running in Germany. As a review of Circored process, this process is amenable to iron ore fines feedstock, and Outotec has confirmed magnetite concentrate particle size distribution would suit the Circored process without additional feed preparation or micro-granulation.

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Efficient Extraction of Vanadium from Vanadium–Titanium Magnetite

In this paper, potassium salt roasting additives were applied to extract vanadium from vanadium–titanium magnetite concentrate. Meanwhile, the mechanisms of potassium salt roasting and acid leaching kinetics were investigated. The results indicate that potassium salt roasting additives are more efficient than sodium and calcium salt and that K2SO4 works best. Under …

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A novel process of reverse flotation-hydrogen reduction for …

The ultra-pure magnetite concentrate could be obtained whose Fe grade and SiO 2 content were separately 72.12 % and 0.19 %, and the Fe recovery reached 82.3 %. Hydrogen reduction of ultra-pure magnetite concentrate showed greater advantages than traditional Höganäs process reduction in terms of thermodynamics, kinetics and reduction effect.

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Mineralization characteristics of pellets prepared by ultrafine

The reducing property of pellets prepared by ultrafine magnetite concentrate (UMC) and improving method were revealed. The results show that the reduction degree of UMC pellets is only about 56% compared with that of pellets prepared from ordinary iron ore concentrate with relatively coarse particle size, which is significantly lower than the general …

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Extraction of Vanadium from Vanadium–Titanium Magnetite

The sodium roasting–water leaching process for vanadium–titanium magnetite (VTM) concentrate faces challenges such as low vanadium recovery, excessive addition of sodium salt, and high alkali content in the tailings. Therefore, reducing the presence of toxic elements like vanadium and alkali metal sodium in the extraction tailings is crucial for the …

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Efficient Removal of Impurities from Refractory Oolitic …

Therefore, in this study, the raw ore was upgraded via a roasting–magnetic separation process, and an oolitic magnetite concentrate was prepared. The total iron (TFe) content in the concentrate is 52.01%, whereas …

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Iron ore magnetite processing

Magnetite concentrate is a higher-grade product than hematite and very desirable as a smelter feed. However, the caveat for this superior product is the requirement for more complex, and higher cost, beneficiation circuits. ... The …

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Pelletization of synthesized magnetite concentrate obtained by

In recent years, studies based on the reduction-roasting of low-grade iron ore followed by the magnetic separation for the production of the desired grade of magnetite concentrate for making pellets is a hot topic [6].Different researchers have studied the reduction-roasting process and reported that it requires above 600 °C temperature to convert the low …

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