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Distribution Behavior of Phosphorus and Metallization of Iron Oxide in Carbothermic Reduction of High-Phosphorus Iron Ore

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Abstract

Distribution behavior of phosphorus and metallization of iron ore in the carbothermic reduction of high-phosphorus iron ore were investigated. Reduction degree of the iron oxide was evaluated by quadruple mass spectrometry connected to thermogravimetric analysis. The distribution of some elements including phosphorus was examined by electron probe micro-analyzer mapping analyses. The reduction behavior of high-phosphorus iron ore was evaluated as a function of reduction temperature, C/O molar ratio, and CaO addition. High reduction temperature accelerated the reduction of both iron oxide and hydroxylapatite, and high C/O molar ratio also promotes both of them. Those were contradictory to the targets of higher reduction degree of iron oxide and of lower one of hydroxylapatite. It was confirmed that appropriate amount of CaO addition could enhance the reduction of iron oxide, and regulate the reduction of hydroxylapatite.

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Author notes

  1. Ji-Whoe Cha (Engineer)

    Present address: POSCO, Kwangyang, Korea

Authors and Affiliations

  1. Graduate Institute of Ferrous Technology (GIFT), Pohang University of Science and Technology (POSTECH), Cheongam-ro 77, Pohang, 790-784, Korea

    Ji-Whoe Cha (Engineer), Dong-Yuk Kim (Graduate Student) & Sung-Mo Jung (Associate Professor)

Authors
  1. Ji-Whoe Cha
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  2. Dong-Yuk Kim
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  3. Sung-Mo Jung
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Correspondence to Sung-Mo Jung.

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Manuscript submitted January 26, 2015.

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Cha, JW., Kim, DY. & Jung, SM. Distribution Behavior of Phosphorus and Metallization of Iron Oxide in Carbothermic Reduction of High-Phosphorus Iron Ore. Metall Mater Trans B 46, 2165–2179 (2015). https://doi.org/10.1007/s11663-015-0399-6

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