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Research on the Wetting and Corrosion Behavior Between Converter Slag with Different Alkalinity and MgO-C Refractories


The wetting and corrosion behavior of slag with different alkalinity and MgO-C refractories were studied through high-temperature wetting experiments. The results showed that as the alkalinity of the slag increased, the final contact angle between the slag and the MgO-C refractory gradually decreased, and the penetration depth of the slag into the refractory gradually decreased. The CaO and SiO2 in the slag penetrated into the MgO-C refractory along the pores or surface cracks formed by carbon oxidation, and reacted with MgO to generate a large amount of low-melting compound (CaO-MgO-SiO2), which accelerated the corrosion of the refractory. As the alkalinity increased, the content of CaO in the slag increased, the viscosity of the slag increased and the fluidity became worse, so the mass transfer and diffusion of molecules or ions in the slag were weakened. In addition, the increase of CaO content reduced the activity of FeO in the slag, which inhibited the interfacial chemical reaction, thereby weakening the wetting effect caused by the reaction.

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The authors thank team partners from the Research Institute of Mass Energy Optimization and New Technology of Metallurgy for their valuable contribution to this work and preparation of this paper. This work was financially supported by National Natural Science Foundation of China (51874171 and 51974154) and supported by university of science and technology liaoning talents program.

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Correspondence to Zhijun He or Xinmei Hou.

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Liu, J., Sheng, H., Yang, X. et al. Research on the Wetting and Corrosion Behavior Between Converter Slag with Different Alkalinity and MgO-C Refractories. Oxid Met (2021).

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  • Converter slag
  • MgO-C refractory
  • Alkalinity
  • Wetting
  • Corrosion