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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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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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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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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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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This study focuses on ordinary magnetite concentrate and utilizes a process combining magnetic separation, flotation, and leaching based on its mineralogical characteristics to produce high-purity magnetite with a purity of up to 99.9 %. The successful implementation of this process will serve as a reference for the production of similar high ...
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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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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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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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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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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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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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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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In order to obtain high-grade concentrate, the magnetite concentrate can be processed by flotation or tailings reprocessing. Contact us to customize magnetite processing flow and get the equipment latest quote on equipment to maximize …
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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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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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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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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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The reductive Bayer process is the most promising method from the perspective of BR elimination because it makes it possible to convert BR in the easy to process by-product with a high iron content in the form of magnetite (Fe 3 O 4) [17,18]. The mechanism of the magnetite formation can be described by Equations (1)–(3).
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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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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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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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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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Oxidation of synthesized magnetite concentrate obtained from the process of reduction roasting followed by magnetic separation, i.e., magnetized roasting of a low-grade iron ore [18], [24], [25] (2) 4Fe 3 O 4 + O 2 = 6γ–Fe 2 O 3, …
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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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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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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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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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Sustainability of the novel process of synthesized magnetite concentrate pelletization and thereby saving the energy requirement (by reducing the consumption of furnace oil as well as anthracite coal fines as additives) were supported by the physical and microstructural properties of the indurated pellets. Various characterization techniques ...
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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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The reduction of magnetite concentrate particles by H2 has been investigated in drop-tube reactor (DTR) to obtain a rate equation that can be applied to the design and analysis of an ironmaking flash reactor. The temperature range in this work is 1623 to 1873 K, where the magnetite concentrate particles become molten droplets.
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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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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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