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Title of Journal: Int J Miner Metall Mater

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Abbravation: International Journal of Minerals, Metallurgy, and Materials

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University of Science and Technology Beijing

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DOI

10.1007/s11060-015-1910-2

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ISSN

1869-103X

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Upgrading and dephosphorization of Western Austral

Authors: Deqing Zhu Tiejun Chun Jian Pan Liming Lu Zhen He
Publish Date: 2013/06/11
Volume: 20, Issue: 6, Pages: 505-513
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Abstract

The technology of direct reduction by adding sodium carbonate Na2CO3 and magnetic separation was developed to treat Western Australian high phosphorus iron ore The iron ore and reduced product were investigated by optical microscopy and scanning electron microscopy It is found that phosphorus exists within limonite in the form of solid solution which cannot be removed through traditional ways During reduction roasting Na2CO3 reacts with gangue minerals SiO2 and Al2O3 forming aluminum silicatecontaining phosphorus and damaging the ore structure which promotes the separation between iron and phosphorus during magnetic separation Meanwhile Na2CO3 also improves the growth of iron grains increasing the iron grade and iron recovery The iron concentrate assaying 9412wt Fe and 007wt P at the iron recovery of 9683 and the dephosphorization rate of 7408 is obtained under the optimum conditions The final product metal iron powder after briquetting can be used as the burden for steelmaking by an electric arc furnace to replace scrap steel

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