Activities of Fe<sub>x</sub>O in Molten Slags Coexisting with Solid CaO and Ca<sub>2</sub>SiO<sub>4</sub>-Ca<sub>3</sub>P<sub>2</sub>O<sub>8</sub> Solid Solution

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  • 固体CaOおよびCa<sub>2</sub>SiO<sub>4</sub>-Ca<sub>3</sub>P<sub>2</sub>O<sub>8</sub>固溶体と共存する液体スラグ中のFe<sub>x</sub>O活量
  • 固体CaOおよびCa₂SiO₄-Ca₃P₂O₈固溶体と共存する液体スラグ中のFe[x]O活量
  • コタイ CaO オヨビ Ca ₂ SiO ₄-Ca ₃ P ₂ O ₈ コヨウタイ ト キョウソン スル エキタイ スラグ チュウ ノ Fe[x]Oカツリョウ

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Abstract

<p>In steelmaking processes, there are incentives to reduce slag volume and CaO consumption. The key to meet these requirements is the better understanding of CaO dissolution mechanism into molten slag, which relies on the knowledge of the thermochemical properties of slags and fluxes used for dephosphorization. In this study, the liquidus compositions coexisted with solid CaO and Ca2SiO4-Ca3P2O8 solid solution simultaneously were determined in the quaternary system CaO-SiO2-P2O5-FexO at 1573 K. Measurements were also conducted on the FexO activities at temperatures between 1542 K and 1604 K by virtue of an electrochemical technique. By using the present experimental results, phosphorus distribution ratios were estimated.</p>

Journal

  • Tetsu-to-Hagane

    Tetsu-to-Hagane 105 (6), 587-594, 2019

    The Iron and Steel Institute of Japan

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