Recovery and separation of iron from iron ore using innovative fluidized magnetization roasting and magnetic separation

Yu, Jianwen; Han, Yuexin; Li, Y.; Gao, Peng

doi:10.2298/jmmb170711050y

Cited by 24 publications

(8 citation statements)

References 17 publications

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“…In response to the problems existing in the prior technologies, a new concept of "peroxidationregenerative reduction-reoxidation" suspension magnetizing roasting was proposed by Northeastern University (NEU) [48][49][50][51][52][53][54][55][56][57][58][59][60]. Further, a new type of suspension roasting pilot-scale test equipment has been successfully developed.…”

Section: Development Of Fluidized Bed Magnetizing Roasting Technologymentioning

confidence: 99%

“…Based on this innovative process and equipment, the suspension magnetizing roasting laboratory and semi-industrial tests have been conducted on iron ore resources domestically and overseas [48][49][50][51][52][53][54][55][56][57][58][59], such as the Ansteel eastern tailings, Donganshan iron ore, JISCO fine ore, tailings and lump ore, and Sierra Leone iron ore. The results are summarized in Table 3.…”

Section: Development Of Fluidized Bed Magnetizing Roasting Technologymentioning

confidence: 99%

“…Main pilot test indexes via NEU's new technology ("-" represents unused resources)[48][49][50][51][52][53][54][55][56][57][58][59][60] …”

mentioning

confidence: 99%

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Fluidized bed roasting technology in iron ores dressing in China: A review on equipment development and application prospect

Tang

Gao

Han

et al. 2019

J min metall B Metall

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Due to the undesirable characteristics of iron ore resources in China, it is necessary to utilize refractory iron ores resources with high efficiency. The mining and mineral processing costs are usually high. The supply of domestic iron ores in China has been in serious shortage for a long time. Therefore, the development and utilization of complex and refractory iron ore resources are extremely urgent. Magnetizing roasting followed by magnetic separation is an important method for the beneficiation of low grade iron ores. More attention has been paid to fluidized bed magnetizing roasting rather than shaft furnace and rotary kiln roasting in recent years. In this paper, the main characteristics of fluidized bed magnetizing roasting technology and the development process of its application in the beneficiation of refractory iron ores are introduced. The research status of several typical fluidized bed roasting processes and equipment in China are also summarized. Moreover, the application prospect of the technology for efficient utilization of low grade hematite, siderite, and limonite ores, as well as iron containing tailings, is analyzed.

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Section: Development Of Fluidized Bed Magnetizing Roasting Technologymentioning

confidence: 99%

Section: Development Of Fluidized Bed Magnetizing Roasting Technologymentioning

confidence: 99%

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Fluidized bed roasting technology in iron ores dressing in China: A review on equipment development and application prospect

Tang

Gao

Han

et al. 2019

J min metall B Metall

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“…Magnetization roasting, including rotary kiln magnetization roasting, shaft furnace magnetization roasting, and suspension magnetization roasting, is regarded as an effective method to treat refractory iron ores (Yu et al, 2018a). Among them, suspension magnetization roasting has obvious advantages in terms of full gas-solid contact, high mass transfer and heat transfer efficiency, and low roasting energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Effect of particle size on reduction kinetics of hematite ore in suspension roaster

Gao¹,

An²,

Li³

et al. 2020

Physicochem. Probl. Miner. Process.

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Suspension magnetization roasting followed by magnetic separation is an innovative and effective way to recover iron from refractory iron ores, and the particle size of the ore greatly affects the roasting index. To identify the effect of particle size on the reduction kinetics for the transformation of hematite to magnetite, a high-purity hematite ore with different size fractions were isothermally reduced using a suspension roaster. The pure hematite ore was divided into-1000+500 µm,-500+150 µm,-150+74 µm,-74+37 µm and-37 µm size fractions, while the gas mixture of CO and CO2 with a volume ratio of 1:4 was used as reductant. The results showed that the most suitable mechanism function for the reduction of-37 µm size fraction hematite ore is the Avrami-Erofeev model. In the case of-500+37 µm size fraction, the reduction process can be described by first-order chemical reaction model. For-1000+500 µm size fraction, the reduction of hematite ore is restricted by the second-order chemical reaction. In addition, scanning electron microscopy (SEM) analysis results demonstrated that the transformation of hematite particles to magnetite is in accordance with the characteristics of shrinking core model. The phase transformation primarily occurs at the edge of hematite particles and then develop towards the inner side of particles. The findings of this paper provide a theoretical basis for the development and utilization of refractory hematite ore via suspension magnetization roasting technology.

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“…In contrast, previous studies showed that the fluidized bed technology provides the advantages of uniform temperature and high efficiency of heat and mass transfer. The hematite in iron ores can be converted to magnetite and magnetic properties will be greatly enhanced by using fludized magnetization raosting [22]. The fluidized bed technology is being widely used in many industries and fields of applications [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Laboratory study on magnetization reduction of CO

Yuan

Han

et al. 2018

J min metall B Metall

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In this study, magnetizing roasting in fluidized bed was employed to separate iron minerals from red mud. The effect of treatment conditions on product quality was investigated. In addition, the phase transformation, changes in magnetism, and microstructures were studied by thermodynamic analysis, chemical analysis, X-ray diffraction technique (XRD), vibrating sample magnetometer (VSM), and optical microscopy. The magnetic concentrates with the total iron grade of 57.65% and recovery of 90.04% were obtained under the optimum conditions. XRD and chemical analysis demonstrated that 92% iron minerals in red mud converted to magnetite. VSM further confirmed that the magnetism of roasting products was strongly enhanced, and the specific susceptibility increased from 1.9×10-5 m 3 /kg to 2.9×10-4 m 3 /kg after magnetizing roasting. Hence, fluidized magnetizing roasting is an effective technology for recovering iron minerals from high-iron red mud.

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Recovery and separation of iron from iron ore using innovative fluidized magnetization roasting and magnetic separation

Cited by 24 publications

References 17 publications

Fluidized bed roasting technology in iron ores dressing in China: A review on equipment development and application prospect

Fluidized bed roasting technology in iron ores dressing in China: A review on equipment development and application prospect

Effect of particle size on reduction kinetics of hematite ore in suspension roaster

Laboratory study on magnetization reduction of CO

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