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MgO Refractory Attack by Transient Non-saturated EAF Slag

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Abstract

The gangue content in iron ore pellets that are used to produce direct-reduced iron (DRI) affects the slag volume during subsequent electric furnace steelmaking. Industrial and laboratory measurements and simulations have shown that unfluxed gangue from DRI also strongly affects the degree of saturation of the steelmaking slag with MgO. Laboratory tests show slag-line attack of such undersaturated slag on an MgO crucible, in support of reported refractory wear during steelmaking with higher-gangue DRI.

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The authors are grateful for the support by the industrial members of the Center for Iron and Steel-making Research, financial support by the China Scholarship Council and use of the Materials Characterization Facility at Carnegie Mellon University, supported by Grant MCF-677785.

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Authors and Affiliations

  1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, China

    Shengqiang Song

  2. School of Metallurgical Engineering, Xian University of Architecture and Technology, Xian, 710055, China

    Junxue Zhao

  3. Center for Iron and Steelmaking Research, Department of Materials Science & Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA

    Shengqiang Song, Junxue Zhao & Petrus Christiaan Pistorius

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  1. Shengqiang Song
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  2. Junxue Zhao
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Correspondence to Junxue Zhao or Petrus Christiaan Pistorius.

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Manuscript submitted August 16, 2019.

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Song, S., Zhao, J. & Pistorius, P.C. MgO Refractory Attack by Transient Non-saturated EAF Slag. Metall Mater Trans B 51, 891–897 (2020). https://doi.org/10.1007/s11663-020-01788-x

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