Dissolution Mechanism of Carbon Brick into Molten Iron

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  • Deng Yong
    School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing
  • Zhang Jian-liang
    School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing
  • Jiao Ke-xin
    School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing

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Description

<p>In order to investigate the dissolution mechanism of carbon brick into molten iron, cylindrical specimens were immersed into molten iron to carry out the experiments. The dissolution reaction of carbon was considered as the dominant reaction through thermodynamic analysis, the result of SEM revealed the hole diameter decrease from the reaction interface to the center position of carbon brick. The quantitative relationship between element content and erosion was obtained through the experimental results, the characteristic parameters were selected to compare the influence degree of element content on the erosion. The calculation model of mass transfer coefficient was established, the dissolution reaction of the sample is controlled by interfacial reaction and mass transfer of carbon when the phosphorus content up to 0.2% in molten iron. The adsorption of sulfur on the iron-carbon interface covers part of the effective surface, the degree of adsorption on the interface depends on the proportion of sites covered by sulfur.</p>

Journal

  • ISIJ International

    ISIJ International 58 (5), 815-822, 2018-05-15

    The Iron and Steel Institute of Japan

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