Thermally assisted liberation of high phosphorus oolitic iron ore: A comparison between microwave and conventional furnaces

Omran, Mamdouh; Fabritius, Timo; Mattila, Riku

doi:10.1016/j.powtec.2014.08.073

Cited by 109 publications

(47 citation statements)

References 32 publications

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“…Rapid and selective microwave heating has been reported to improve the performance of heterogeneous catalytic processes compared to conventional heating in one or more of the following terms (faster reaction rate, better product distribution, higher energy efficiency) [10][11][12][13][14]. One of the key factors determining the extent of these effects is the ability of the catalytic material to dissipate microwave energy (i.e., to become efficiently heated by microwaves).…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, and application of ruthenium-doped SrTiO 3 perovskite catalysts for microwave-assisted methane dry reforming

Gangurde

Sturm

Valero-Romero

et al. 2018

Chemical Engineering and Processing - Process Intensification

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Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, and application of ruthenium-doped SrTiO 3 perovskite catalysts for microwave-assisted methane dry reforming

Gangurde

Sturm

Valero-Romero

et al. 2018

Chemical Engineering and Processing - Process Intensification

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“…The results indicated that the improvement in iron recovery is attributed to microwave radiation enhancement of the magnetic properties of weak magnetic mineral (hematite) through altering the mineral to more magnetic phases (maghemite or magnetite). The influence of microwave pre-treatment on the liberation of high phosphorus oolitic iron ore was also investigated [5,6]. The results showed that compared to conventional thermal treatment, microwave treatment consumes considerably less energy, improves liberation and reduces processing time.…”

Section: Introductionmentioning

confidence: 99%

XPS and FTIR spectroscopic study on microwave treated high phosphorus iron ore

Omran

Fabritius

Elmahdy

et al. 2015

Applied Surface Science

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a b s t r a c tA growing interest in microwave heating has emerged recently. Several potential microwave applications regarding minerals' processing have been investigated. This paper investigates the effect of microwave radiation on Egyptian high phosphorus iron ore. Three different iron ore samples have varying Fe 2 O 3 and P 2 O 5 contents and mineralogical textures were studied. A comparative study has been carried out between untreated and microwave treated iron ore. XRD and FTIR analyses showed that after microwave radiation the crystallinity of iron bearing minerals (hematite) increased, while the functional chemical groups of phosphorus bearing minerals (fluorapatite) and other gangues dissociated. High resolution XPS analyses of Fe 2p peaks showed that after microwave radiation a portion of Fe(+III) was reduced to Fe(+II). This means that after microwave radiation iron oxide (hematite, Fe 3+ ) transformed into more magnetic phase. The results indicated that microwave radiation had a positive effect on the magnetic properties of iron oxide, through formation of ferromagnetic phases.

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“…C STATE OF THE ART orster et al [10] ground and floated massive copper sulfide ores in Neves-Corvo Mine after microwave irradiation and found that microwave pre-irradiation can reduce Bond's work index of minerals by 70% and significantly increase the single separation degree of useful minerals after ore grinding. Mamdouh Omran et al [11] exposed iron ores to microwave irradiation and conducted electron microscopic scanning to ores. Their experiment confirmed that microwave heating resulted in microcracks developing easily between minerals and gangue compared with the traditional heating method.…”

Section: Introductionmentioning

confidence: 99%

Analysis on the growth of different shapes of mineral microcracks in microwave field

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2016

Frattura Ed Integrità Strutturale

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ABSTRACT. Microwave heating-assisted ore grinding and crushing can effectively increase the dissociation energy of minerals and decrease energy consumption. Microcrack growth and distribution characteristics inside different shapes of ore particles, which are composed of galena and calcite under microwave irradiation, were analyzed using discrete element method to explore the effects of mineral shapes on microwave-assisted dissociation. Growth laws on the total number of microcracks, numbers of microcracks in galena and calcite, and boundary damage rate against irradiation time under high power and low power were studied. Research results demonstrated that mineral shape mainly affects the quantity of microcracks inside ores but does not their growth law.

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Thermally assisted liberation of high phosphorus oolitic iron ore: A comparison between microwave and conventional furnaces

Cited by 109 publications

References 32 publications

Synthesis, characterization, and application of ruthenium-doped SrTiO 3 perovskite catalysts for microwave-assisted methane dry reforming

Synthesis, characterization, and application of ruthenium-doped SrTiO 3 perovskite catalysts for microwave-assisted methane dry reforming

XPS and FTIR spectroscopic study on microwave treated high phosphorus iron ore

Analysis on the growth of different shapes of mineral microcracks in microwave field

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