Reduction roasting followed by magnetic separation is a promising method to recover the iron values from low-grade iron ores. The process involves the reduction of Conversely, fine-grained magnetite ores require fine grinding, often to below 30 μm, to liberate the magnetite from the silica matrix, incurring greater costs and energy Comminution and classification technologies of iron ore
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This paper systematically summarized the magnetic particle motion dynamics model and magnetic particle accumulation model based on the magnetic field In this study, to improve iron recovery from low-grade iron ores, preconcentration was performed, followed by two separation processes, namely, reverse Improved iron recovery from low-grade iron ore by efficient
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Microwave reduction methods, which are different from the conventional roasting methods with main features including selective heating and low energy In this paper, an improved Fe recovery method from the refractory fine-grained iron ores was proposed, and iron can be stepwise recovered by microwave Development of roasting-acid leaching-magnetic separation
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The proposed technology owns low energy consumption and high metals recovery. Abstract An innovative technology named solid-state metalized The main advantages of early periodic electromagnetic high gradient magnetic separator are [1]: less magnetic leakage, low medium filling rate (only 4% ~ 14%), Equipment with Journal of Physics: Conference Series PAPER OPEN
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Nickel, a valued metal, mainly exists as nickel oxide in laterite nickel ore. Furthermore, a large part of the laterite nickel ore is low-grade saprolitic ore. In this paper, a research on preparing ferro-nickel There are several pre-concentration technologies available, one of them being ore sorting (Cutmore et al., 1998, Iyakwari and Glass, 2014, Lessard et al., 2014, Lessard et al., 2015, Robben and Wotruba, 2019).Adoption of sensor-based ore sorting solutions that reduce energy consumption and rationalise water use is becoming of more Towards waterless operations from mine to mill ScienceDirect
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In the pilot-scale test, a rotary kiln (inner diameter of 0.45 m and a length of 7.5 m) equipped with an oil lance for heating (Fig. 2 b) was utilized. Fig. 2 shows some photographs of the pilot-scale test. In contrast to RKEF, no electric furnace is used, and high-quality ferronickel concentrates are produced, thereby reducing investment cost and The assessment of the influence of the ore texture on the technological parameters of dry magnetic separation indicates their insignificant changes: the yield of the non-magnetic product varies(PDF) Analysis of the Effect of Dry Magnetic Separation
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Downstream processing needs more innovative ideas to advance and overcome current bioprocessing challenges. Chromatography is by far the most prevalent technique used by a conservative industrial sector. Chromatography has many advantages but also often represents the most expensive step in a pharmaceutical production process. Therefore, Utilization of plentiful fine-disseminated iron oxide ores resources attracted increasing attention in these years due to the depletion of easy-dressing iron ore reserves. In this paper, an improved Fe recovery method from the refractory fine-grained iron ores was proposed, and iron can be stepwise recovered by microwave-assisted Development of roasting-acid leaching-magnetic separation
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In this study, segregation roasting and magnetic separation are used to extract nickel from a garnierite laterite ore. The garnierite laterite ore containing 0.72% Ni, 0.029% Co, 8.65% Fe, 29.66% MgO, and 37.86% SiO2 was collected in the Mojiang area of China. Garnierite was the Ni-bearing mineral; the other main minerals were potash The magnetic product obtained in the present study contained > 56% Fe and low amounts of Mn impurities (< 5%) that suit sintered ore qualities in line with the demands of the iron and steel industry. This product was obtained from the leached residues collected from the optimum leach conditions by high-intensity wet magnetic separation.Separation of Fe and Mn from Manganiferous Iron Ores via
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with [16,17] on the beneficiation of iron-containing ore magnetic separation waste. 2. This drum, when used, sufficiently reduces power consumption as a low-power electric motor can be used. High rotation speed makes the drum physically rigid. It is desirable for fine particle magnetic separation to have a small layer of separated Conventional mill scale scrap treatment methods for metal extraction are characterized by high energy consumption and low value addition. In this study, co-treatment of mill scale scrap and manganese ore via the oxidization roasting-magnetic separation process was investigated for the synchronous preparation of higher-value materials andInnovative methodology for co-treatment of mill scale scrap
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High gradient magnetic separation is widely used in magnetic minerals upgrading, and its separation performance is significant depending on the parameters. In this investigation, the Mathematical model of the plate high gradient magnetic separator is established, the magnetic induction and the flow field distribution are investigated based A flowsheet combining high gradient magnetic separation (HGMS) and flotation was applied to recover the ilmenite, which had defects of high production cost due to high flotation regent consumption, low ilmenite utilization rate of 20% as ultrafine minerals were directly discharged into tailings, as well as bring a series of environmental problems.A review on the enrichment of iron values of low-grade Iron ore
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Iron ore tailings are industrial solid wastes generated from mineral processing. The disposal of iron ore tailings leads to environmental threat and serious security because of their tiny particle size and large storage. In this paper, suspension magnetization roasting and magnetic separation technology were utilized to recover iron The high-efficiency extraction of iron from early iron tailings via the innovative suspension roasting-magnetic separation (SRMS) technology would be an important method to consolidate the available iron ore resources. In this study, the roasting effect and product characterizations of SRMS were investigated by the SRMS tests, X High-efficiency extraction of iron from early iron tailings via
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The chloridization and reduction roasting of high-magnesium, low-nickel oxide ore containing 0.82 pct Ni and 31.49 pct MgO were investigated in this study. Mineralogical investigation indicated that 84.6 pct of nickel was associated with silicates, and nickel was well distributed in mineral in the form of isomorphism. A series of materials with high magnetic content, especially when strong magnetic minerals are not removed in low intensity magnetic separation operation, it is easy to lead to magnetic inclusion, which makes the selectivity of the separation process worse, and even occurs magnetic blockage and interferes with the separation process in serious cases. 3.3.Journal of Physics: Conference Series PAPER OPEN
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To recover magnetite from tailings we used magnetic separation. Magnetic fraction contained 59.3% of Fe total and recovered 89% of Fe mag (table 2). Table 2. The results of the first stage of magnetic separation. Produc t Yield, % Fe content, % Fe recovery, % Tot Mag Hem Tot Mag Hem Magne-tic 18.0 59.3 55.5 2.4 52.5 89.0 8.2 Non-magne-ticResearch on the permanent roll magnetic separator started as early as the 1970s, whereas related industrial applications began in the 1980s, starting from dry iron production from nonmetallic oresDry High-Intensity Magnetic Separation In Mineral
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then upgraded by magnetic separation, 75 per cent of the total mass being rejected as tailings, and a high grade nickel concentrate, assaying 5.1 per cent Ni and 82.66 per cent Fe totalCarbothermal reduction and magnetic separation. A low-grade REE–Nb–Fe ore was used in this study; the chemical composition is shown in Table 1. Chinese Lu'an pulverized coal was used as the reducing agent; the chemical composition is shown in Table 2. The reduction roasting experiments were carried out in a muffle Separation and recovery of valuable metals from low-grade REE–Nb–Fe ore
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