An Electrochemical Study of Silica Diffusion in Liquid CaO-SiO2-Al2O3-CaF2 Slags

P-O MELLBERG; P-Å LUNDSTRÖM

doi:10.2355/isijinternational1966.21.591

Transactions of the Iron and Steel Institute of Japan

Online ISSN : 1881-1183
Print ISSN : 0021-1583

An Electrochemical Study of Silica Diffusion in Liquid CaO-SiO₂-Al₂O₃-CaF₂ Slags

P-O MELLBERG, P-Å LUNDSTRÖM

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JOURNAL FREE ACCESS

1981 Volume 21 Issue 8 Pages 591-595

DOI https://doi.org/10.2355/isijinternational1966.21.591

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Abstract

The transfer of Si between a liquid Fe-Si alloy and liquid CaO-Al₂O₃ SiO₂ slags with small amounts of CaF₂ was studied by an electrochemical galvanostatic method. The rate of transfer of Si was found to be limited exclusively by diffusion in the slag. This allowed the evaluation of the chemical diffusivity of silica in the slag, which was found to increase from about 10^-7cm²/sec at 1350°C up to 10^-6 at 1 450°C. Small additions of CaF₂ increased the difusivity considerably.

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