The process of reduction roasting (magnetic roasting and direct reduction roasting) followed by magnetic separation has also been applied to recover iron from oolitic hematite ore (Li et al., 2010, Matinde and Hino, 2011a, Matinde and Hino, 2011b, Yu and Qi, 2011). ... Reduction roasting of high-phosphorus oolitic iron ore (HPOIO) …
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Experimental results show that the iron concentrate with total iron grade of 61.78% and phosphorus content of 0.23% was obtained from an oolitic hematite ore containing 47.71% iron and 0.874% phosphorus by magnetization roasting-magnetic separation-reverse flotation separation process under the proper conditions.
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Magnetization roasting is one of the most effective way of utilizing low-grade refractory iron ore. However, the reduction roasting of siderite (FeCO3) generates …
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The shaft furnace is one of the first pieces of equipment used in magnetizing roasting of low-grade and weakly magnetic iron ores. As early as 1926, an industrial-scale shaft furnace for iron ore magnetizing roasting was established in Anshan, China [41]. For the magnetizing roasting process, the shaft furnace was the main component for thermal ...
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Magnetizing roasting–magnetic separation is an effective method for upgrading refractory iron ores that cannot be treated by conventional mineral separation …
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The process of wet magnetic separation of oxidized ore from the deposit of Abail, Republic of Kazakhstan, is studied. Kinetics of roasted product milling is analyzed, and the optimal size is recommended for the fist stage of milling as −0.071 mm at the content of 55–60%. The accomplished magnetic analysis of different size products …
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Magnetization roasting followed by magnetic separation is considered an effective method for recovering iron minerals. As hematite and magnetite are the main …
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Finally, the magnetic component of the roasted ore can be recovered by magnetic separation after being liberated from gangue minerals. Many pilot-scale suspension magnetizing roasting and magnetic ...
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The reduction roasting was followed by multi-pass low-mid intensity magnetic separation to treat the low-grade iron ore fines (Fe 44.53%, 40.13% silica). The results showed that the conventional reduction roasting at optimum conditions (800 °C, …
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Magnetization roasting is considered as an effective and typical method for the beneficiation of refractory iron ores. After magnetization roasting, the weakly magnetic …
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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 …
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Separated preparation of prealloys and amorphous alloys results in severe solidification–remelting and beneficial element removal–readdition contradictions, which markedly increase energy consumption and emissions. This study offered a novel strategy for the direct production of FePC amorphous soft magnetic alloys via smelting reduction …
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Magnetization roasting is one of the most effective way of utilizing low-grade refractory iron ore. However, the reduction roasting of siderite (FeCO3) generates weakly magnetic wüstite, thus reducing iron recovery via weak magnetic separation. We systematically studied and proposed the fluidized preoxidation-low-temperature reduction …
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Magnetizing roasting–magnetic separation is an effective method for upgrading refractory iron ores that cannot be treated by conventional mineral separation processes, such as oolitic hematite, mixed iron ores, complex iron tailings [17, 18], and low-grade siderite and limonite . The technology comprises magnetizing roasting of the ...
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High-phosphorus oolitic iron ore, treated by suspended flash magnetic roasting, contained 42.73% iron (mainly present as magnetite) and 0.93% phosphorus (present as collophane). Low-intensity magnetic separation (LIMS) was combined with reverse flotation to increase the iron and reduce the phosphorus contents of the roasted …
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Because metal iron and nickel are magnetic, the extent of the magnetic field strength is a major factor that affects the metal grade in ferronickel concentrate. The impurities in the roasted ore could be separated by the action of magnetic fields. The metal grade in the concentrate was highest when the magnetic field strength was 140 mT.
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These iron ores contain many detrimental impurities and are difficult to upgrade to make suitable concentrates for the blast furnace. In this paper, the beneficiation of a low-grade hematite ore fines containing carbonates with magnetization roasting and magnetic separation was proposed and studied.
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High-iron and low-silicon red mud is not only an alkaline solid waste from Bayer process alumina production, but it is also a very important secondary iron resource. Magnetization roasting is considered as an effective and typical method for the iron recovery and removal of impurities in red mud. In this work, based on the characteristics …
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Through grinding and secondary magnetic separation, the iron minerals and gangue components, as well as arsenic, in roasted sand can be further separated. The optimum procedure results in a high-grade iron concentrate with an iron assay of 65.65%, an Fe recovery rate of 80.07%, and an arsenic content of 0.085%, while achieving a …
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Magnetic property studies demonstrated that an iron concentrate containing 88.72% magnetic iron oxides with a maximum saturation magnetization of 41.393 emu/g …
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Yu et al. (2019) have reviewed the application of microwave-assisted magnetizing roasting of iron ores but noted that it has yet to be implemented successfully in a semi-industrial or ... Optimal recovery of iron values from a low grade iron ore using reduction roasting and magnetic separation. Sep. Sci. Technol., 49 (12) (2014), pp. …
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The effect of CaCO3, Na2CO3, and CaF2 on the reduction roasting and magnetic separation of high-phosphorus iron ore containing phosphorus in the form of Fe3PO7 and apatite was investigated.
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Considering the challenges in the beneficiation of Dilband iron ore, an alternative route needs to be utilized. Magnetic roasting is a possible alternative route to counter these challenges, and it has proved to produce high yields from low-grade iron ores [9]. Magnetic roasting consists of reduction roasting followed by magnetic separation.
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Keywords: arsenic; iron ore; calcification-magnetic roasting; magnetic separation. 1. Introduction. Arsenic is a common element in the Earth's crust, with an average concentration of. five ...
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The magnetic roasting of oolitic iron ore can be accomplished in iron phase transformation, but the configuration of oolitic particles has not changed. Magnetization transformation is mainly ...
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exploitation and utilization of high-phosphorus iron ores [19–20]. Studies have demonstrated that, in the coal-based reduc-tion roasting–magnetic separation of high-phosphorus iron ore, certain calcium and sodium compound additives must be used to enhance the iron recovery and dephosphorization.
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Herein, we have presented the feasibility study using reduction roasting process on one of the Indian low-grade BHQ iron ore for the preparation of magnetite concentrate-based pellet feed materials.
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According to the difference of ore property, magnetizing roasting process for the recovery of iron minerals includes reducing roasting, neutral roasting and oxidizing roasting [19]. For hematite, the purpose of magnetizing roasting is reducing hematite to magnetite, and the reducing agents are usually C, CO and H 2 .
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Magnetization roasting is considered as an effective and typical method for the beneficiation of refractory iron ores. After magnetization roasting, the weakly magnetic iron minerals, including hematite, limonite and siderite, are selectively reduced or oxidized to ferromagnetic magnetite, which is relatively easier to enrich by magnetic ...
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Magnetization roasting is considered as an effective and typical method for the beneficiation of refractory iron ores. After magnetization roasting, the weakly magnetic iron minerals, including ...
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