An Investigation into the Pelletizing Performance of Blends

Additionally, green balls prepared by replacing 25% of magnetite concentrate with hematite concentrate showed good compressive strength, while fired pellets met the requirements for high-quality pellets in a simulation of the grate-rotary kiln process . Thus, the substitution of magnetite with hematite concentrate in both industrial and ...

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How to Recover Iron from Magnetite: 4 Methods and Stages

Magnetite is an iron oxide ore, which belongs to the equiaxed crystal system, and its chemical formula is Fe3O4. The Mohs hardness of magnetite is 5.5~6.5. Like hematite, it has strong magnetism. In ancient times, it was also called a magnet. Magnetite is often formed in igneous, metamorphic, or granitic pegmatites, high-t…

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Kinetics of hydrogen reduction of magnetite concentrate …

The magnetite concentrate used in this experiment was produced from Taco-nite ore provided by ArcelorMittal Company in the US. The magnetite con-centrate particles were screened to 20– 25, 32–38 and 45–53 µm size fractions. The same concentrate was used in pre-vious publications where more detailed information about it can be found [19].

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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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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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Vanadium recovery from Na2SO4-added V-Ti magnetite concentrate …

Pilot experiments on Na 2 SO 4-roasting of V-Ti magnetite (VTM) concentrate pellets were performed to activate vanadium with simulated grate-kiln machinesbined with thermodynamic calculation, X-ray diffraction (XRD), scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDS), and inductively coupled plasma-atomic emission …

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Preparation of reduced iron powder for powder metallurgy from magnetite

An important index in the reduction process is the recovery rate of iron, which is calculated as follows: η Fe = T Fe 2 × m 2 T Fe 1 × m 1 where η Fe is the recovery factor of RIP, and T Fe2 and T Fe1 are the total iron content of the magnetic RIP and magnetite concentrate, respectively; m 1 and m 2 are the weights of the magnetite ...

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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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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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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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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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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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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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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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Effect of Hematite Concentrate on Iron Ore Pellet Quality

Kumar PS, Ravi BP, Sivrikaya O (2021) The study of pelletizing of mixed hematite and magnetite ores. Sci Sintering 51(1):27–38. Google Scholar Umadevi T, Sridhara KS, Rameshwar S (2021) Optimization of induration cycle for magnetite concentrate and its usage in pellet-making process designed for hematite concentrate.

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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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Vanadium–Titanium Magnetite Concentrate, …

This paper investigated a pellet ore production process in which vanadium was extracted from vanadium and titanium magnetite concentrates using sulfuric acid leaching. Calcium and magnesium were added to the iron ore concentrate during pellet production to produce calcium vanadate and magnesium vanadate after roasting. The pellets were leached …

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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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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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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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Optimization of Induration Cycle for Magnetite Concentrate and its

In the magnetite iron ore pelletization process, oxidation of magnetite followed by sintering of the oxidized magnetite (hematite) is desirable. Optimum preheating time & temperature and roasting time & temperature is required to get the desired properties of the pellets with magnetite, hematite, and hematite–magnetite blend. In order to utilize the …

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Preparation of superior magnetite concentrate from waste tailings …

The hematite of raw ore was transformed to magnetite fully. The magnetic separation results indicated that the roasted sample could be separated effectively by the …

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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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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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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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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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Process Mineralogical Analysis of a Typical Vanadium Titano …

Keywords Vanadium titano-magnetite concentrate ·Process mineralogy ·Phase composition ·Phase embedding characteristics ·Elements distribution behavior J. Pan · X. Wang (B) · D. Zhu · Z. Guo · C. Yang · S. Li School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China

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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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Preparation of high-purity reduced iron powder by H gan s …

from ultra-pure magnetite concentrate WU Jin-tian()1, XU Bin ... magnetite concentrate for the Höganäs process were demonstrated by comparing with the iron scale in terms of raw material properties, reduction efficiency, process flow and product performance. Then, the enhancement mechanism for the process ...

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