Dephosphorization rate of high carbon iron melts by CaO-based slags

T. Sato, Kunihiko Nakashima, K. Mori

    研究成果: Contribution to journalArticle査読

    4 被引用数 (Scopus)

    抄録

    The oxidation rates of phosphorus in high carbon iron melts were examined at 1400°C by using CaO-based slags such as LD slag and Calcium Ferrite (CF) type slag. The results were analyzed with the coupled reaction model. Although, little phosphorus was initially oxidized by the addition of LD slag alone, the degree of dephosphorization was considerably improved by adding further FeO to LD slag. This improvement can be explained by the increase in oxygen activity at the slag-metal interface and mass transfer coefficient. The degree of dephosphorization by CF type slags was higher than that by LD slag. Among them, the degree of the dephosphorization by a mixture of CaO or CaCO3 and Fe2O3 was higher than that by CF sintered. The phosphorus distribution ratio and the CaO efficiency for dephosphorization by CF type slags were compared with those by slags containing CaF2 or CaCl2. As a result (or As a conclusion) it was expected for CF type slags to be the effective flux for the dephosphorization in practical operation.

    本文言語英語
    ページ(範囲)643-649
    ページ数7
    ジャーナルTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
    87
    10
    DOI
    出版ステータス出版済み - 1 1 2001

    All Science Journal Classification (ASJC) codes

    • 凝縮系物理学
    • 物理化学および理論化学
    • 金属および合金
    • 材料化学

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