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Effect of Silicon on Removal of Phosphorus from High Phosphorus Si–Mn Alloy by CaO-Based Slag

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8th International Symposium on High-Temperature Metallurgical Processing

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

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Abstract

The effect of silicon on removal of phosphorus from high phosphorus Si–Mn alloy was investigated at 1673 K by CaO-based slag. It was found that the dephosphorization efficiency increases significantly as increasing the silicon content, which is due to the reaction between silicon and CaO at slag/alloy interface. The relation between silicon content with oxygen activity and phosphorus activity coefficient of Si–Mn melt was determined respectively as follows:

$$ \lg \,a_{\text{O}} = - 1.55x_{\text{Si}} - 1.67;\,\ln \,r_{\text{P}} = 9.26{\text{e}}^{{\frac{{x_{\text{Si}} }}{0.0433}}} + 11.0839 $$

The carbon content in Si–Mn melt decreases continuously with the increasing silicon content, meanwhile, the decreasing rate of carbon content becomes rapid when the mole fraction of silicon is about 0.32. Si addition is beneficial for both dephosphorization process and low carbon Si–Mn alloy production.

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Authors and Affiliations

  1. College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, People’s Republic of China

    Zhiqiang Zhou, Zizong Zhu, Yuchuan Ding & Shengnan Zhou

Authors
  1. Zhiqiang Zhou
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  2. Zizong Zhu
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  3. Yuchuan Ding
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  4. Shengnan Zhou
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Corresponding author

Correspondence to Zizong Zhu .

Editor information

Editors and Affiliations

  1. Michigan Technological University , Houghton, Michigan, USA

    Jiann-Yang Hwang

  2. Central South University , Changsha, Hunan, China

    Tao Jiang

  3. Proval Partners SA , Lausanne, Switzerland

    Mark William Kennedy

  4. Istanbul Technical University , Istanbul, Turkey

    Onuralp Yücel

  5. Dept of Materials Science and Eng, Carnegie Mellon Univ Dept of Materials Science and Eng, Pittsburgh, Pennsylvania, USA

    P. Chris Pistorius

  6. Universidade Federal de Minas Gerais , Belo Horizonte, Brazil

    Varadarajan Seshadri

  7. The University of Queensland , Brisbane, Australia

    Baojun Zhao

  8. RHI AG , Leoben, Austria

    Dean Gregurek

  9. Atilim University , Ankara, Turkey

    Ender Keskinkilic

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Zhou, Z., Zhu, Z., Ding, Y., Zhou, S. (2017). Effect of Silicon on Removal of Phosphorus from High Phosphorus Si–Mn Alloy by CaO-Based Slag. In: Hwang, JY., et al. 8th International Symposium on High-Temperature Metallurgical Processing. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-51340-9_55

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