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Simultaneous Recovery of Iron and Phosphorus from a High-Phosphorus Oolitic Iron Ore to Prepare Fe-P Alloy for High-Phosphorus Steel Production

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Abstract

Unlike previous dephosphorization studies, the present work complies with a concept to recover phosphorus within the utilization of high-phosphorus oolitic iron ores to prepare Fe-P alloy for high-phosphorus steel production. Simultaneous enrichment of iron and phosphorus can be achieved by directly alloying the high-phosphorus oolitic iron ore at high reduction temperatures (≥1623 K). Neither fluxes nor other special additives need to be used. Consequently, the phosphorus element migrates from original apatite to the slag phase with the elevating temperature from 1323 K to 1473 K, and it further moves into metallic iron and forms Fe3P at 1623 K. A metalized iron-phosphorus alloy with assaying of 96.51% iron and 2.03% phosphorus content was obtained at 1623 K for 10 min at corresponding iron and phosphorus recovery rates of 97.50% and 64.51%, respectively. This process exhibits high economic efficiency and is practicable as a stepping-stone for the efficient and direct utilization of high-phosphorus iron ore resources.

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Acknowledgements

Financial support from the National Torch Program Project of China (Grant 2011GH561685), China Scholarship Council (CSC) Ph.D. scholarship program, and Hunan Provincial Co-innovation Center for Clean and Efficient Utilization of Strategic Metal Mineral Resources are sincerely appreciated.

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Authors and Affiliations

  1. School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China

    Congcong Yang, Deqing Zhu & Jian Pan

  2. CSIRO Mineral Resources, Brisbane, QLD, 4069, Australia

    Congcong Yang & Liming Lu

Authors
  1. Congcong Yang
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  2. Deqing Zhu
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  3. Jian Pan
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  4. Liming Lu
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Correspondence to Congcong Yang.

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Yang, C., Zhu, D., Pan, J. et al. Simultaneous Recovery of Iron and Phosphorus from a High-Phosphorus Oolitic Iron Ore to Prepare Fe-P Alloy for High-Phosphorus Steel Production. JOM 69, 1663–1668 (2017). https://doi.org/10.1007/s11837-017-2385-8

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  • DOI: https://doi.org/10.1007/s11837-017-2385-8

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