· Magnetizing roasting of oolitic hematite ore from western Hubei Province was investigated. The mechanism for reduction roasting of oolitic hematite ore was discussed and analyzed. It is found that flash magnetizing roasting-magnetic separation process is a promising approach for the processing of oolitic hematite ore from western
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· Fe–P magnetic separation results are imperfect when oolitic hematite pellet is reduced at 1050 C for 120 min in the absence of additives, a magnetic concentrate with 85.1% Fe and 0.97% P was obtained from an
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· A thermodynamic analysis of the carbothermic reduction of high-phosphorus oolitic iron ore (HPOIO) was conducted by the FactSage thermochemical software. The effects of temperature, C/O ratio, additive types, and dosages both on the reduction of fluorapatite and the formation of liquid slag were studied. The results show
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· Oolitic iron ore is one of the most important iron ore resources, which widely exists in France, Germany, America, Canada, China etc.1,2) However, it has not been exploited around the world since its unique oolitic structure and generally contains high levels of phosphorus that resist to conventional mineral processing methods. Along
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3. However, excessive CaCO. 3reacted with gangue and FeO to generate a large amount of slag (such as kirschsteinite), which hindered the diffusion and growth of the iron grain and increased the iron loss. KEY WORDS: high-phosphorus oolitic hematite; direct reduction; CaCO. 3; Fe-P; magnetic separation.
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green utilization of high phosphorus iron ore. Key words: high-phosphorus oolitic hematite ore; direct reduction; magnetic separation; Fe-Palloy Cite this article as: LI Si-wei, PAN Jian, ZHU De-qing, YANG Cong-cong, GUO Zheng-qi, DONG Tao, LU Sheng-hu.
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· The efficient development and utilization of high-phosphorus oolitic hematite is of great strategic significance for the sustainable supply of iron-ore resources in China. In this paper, the mechanism of high-temperature pretreatment for enhancing the effect of iron enrichment and dephosphorization in the magnetization roasting–leaching
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· Flotation research reveals that the laboratory-produced fatty acid serves as an effective collector for high-phosphorus oolitic hematite. A favorable result was achieved, with an iron content of 57.67%, phosphorus content of 0.14% and a flotation recovery of 82.43%.
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· With the development of the steel industry, the use of high-grade and easy-to-handle iron ore is gradually decreasing. At present, the effective utilization of low-grade and refractory iron ore, particularly high-phosphorus oolitic iron ore, has gradually become a research hotspot and a worldwide problem. This type of ore is mainly
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· Yu and Qi (2011) investigated flash reduction roasting and magnetic separation of oolitic hematite iron ore, obtaining a product with an iron recovery of 93.05% and a grade of 60.16% Fe from 43.76
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· Although China's iron ore reserves are high, more than 80 billion tons, the problems of low grade, poor endowment, and high cost of mining and separation of iron ore has caused a shortage in iron
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:Magnetic SeparationMagnetic Iron OresIron Ore Separation Magnet · High-phosphorus (P) iron ore, particularly oolitic hematite, has remained unexploited due to technological and cost limitations in mining. Effectively developing this
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· The results show that by only adopting traditional magnetization roasting–magnetic separation, an iron ore concentrate containing 57.49% Fe and 1.4% P2O5 at an iron recovery rate of 87.5% and a
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:Magnetic SeparationIron RecoveryDephosphorization of Iron OreThe SLon Vertical Ring and Pulsating High Gradient Magnetic Separator was developed to overcome multiple disadvantages associated with traditional horizontal type Wet High
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magnetic separation. Two SLON-1500 VPHGMS separators are being used as scavengers and the SQC high-intensity magnetic separators are installed as roughers
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method combined with physical separation, such as the coal-based direct reduction assisted with grinding and magnetic separation process,12,13) which is beneficial for the DRI Phosphorus Removal of High Phosphorous Oolitic Iron Ore with Acid-Leaching
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Coal-based reduction followed by magnetic separation is an effective way to recover iron from high phosphorus-containing oolitic hematite ore. Given that high quantities of dephosphorization agent are needed to
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· There are some key research publications on the reduction roasting of low-grade oolitic iron ore from the west of Hubei Province, China. Luo et al. [46] achieved a concentrate of 56.34% Fe with a
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· In this paper, an innovative method is proposed to upgrade iron and remove phosphorus from high-phosphorus oolitic hematite ore by the sodium magnetization roasting–magnetic separation–sulfuric acid and sodium hydroxide leaching process. The process parameters of sodium magnetization roasting, acid leaching, and
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· Oolitic iron ore is one of the most important iron resources. This paper reports the recovery of iron from high phosphorus oolitic iron ore using coal-based reduction and magnetic separation. The influences of reduction temperature, reduction time, C/O mole ratio, and CaO content on the metallization degree and iron recovery
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· Fe–P separation and the behaviors of Fe and P in separation process of high-phosphorus oolitic hematite ore from western Hubei province in China were studied. Various parameters, including reducing temperature and time, dosage of the pulverized coal, grinding fineness of magnetic separation feed, magnetic field intensity and grinding
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:Magnetic SeparationIron RecoveryThis research reports a systematic approach using reduction roasting and magnetic separation for oolitic iron ores from west Hubei Province. Firstly, a mineralogical study was performed and it was shown that the oolitic
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· Abstract. This chapter introduces the principle of how low-grade iron ores are upgraded to high-quality iron ore concentrates by magnetic separation. Magnetite is the most magnetic of all the naturally occurring minerals on earth, so low-intensity magnetic separators are used to upgrade magnetite ores. On the other hand, because
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the slag by magnetic separation. Several research efforts have been made in coal-based reduction, demonstrating that it is a feasible method to make use of oolitic iron ore as a mineral resource for ironmaking. The effects of reduction temperature, reduction time
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· WU Shi-chao, SUN Ti-chang, KOU Jue, LI Xiao-hui. Pilot study of high-phosphorus oolitic iron ore for iron recovery and dephosphorization by direct reduction–magnetic separation[J]. Chinese Journal of Engineering, 2022, 44(5): 849-856. DOI: 10.13374/j.issn2095
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:Magnetic SeparationIron RecoveryLong Chen · The separation of iron and phosphorus, as well as the phosphorus content in magnetic separation significantly affect the TFe. If apatite is not reduced, the
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· A Typical XRD pattern to show the raw oolitic iron ore. Roasting temperature (700 ~ 850 °C) on magnetic roasting result of (a) Fe recovery, and (b) Fe content of final concentrate.
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DOI: 10.1016/J.MINPRO.2015.09.005 Corpus ID: 93371836 Thermogravimetric study of coal-based reduction of oolitic iron ore: Kinetics and mechanisms @article{Sun2015ThermogravimetricSO, title={Thermogravimetric study of coal-based reduction of oolitic iron
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· For the coal-based direct reduction process, considerable studies have been done for hematite ores [11] [12][13][14][15][16], in which the following process of magnetic separation has also been
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· The high phosphorus oolitic hematite ores are more amenable to dephosphorisation by physical separation than the limonitic ones ( Jiang et al., 2008 ). Following beneficiation of such ore graded at 37.51% Fe and 0.88% P by spiral chute and shaking table, an iron concentrate with 58.67% Fe and 0.52% P at 51.93% recovery has
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