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The redox equilibria of copper ions in the molten silicate fluxes as a measure of basicity

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Abstract

The redox equilibria of copper ions in the molten NaO0.5-SiO2, NaO0.5-NaF-SiO2, NaO0.5-CaO-SiO2, CaO-CaF2-SiO2, CaO-MgO-SiO2, and CaO-SiO2 systems have been measured in order to seek a new measure of flux basicity. The Cu2+/Cu+ ratio decreases with increasing the content of basic oxide. The correlations between the Cu2+/Cu+ ratio and other refining indexes, such as carbonate, sulfide, and phosphate capacities, CaO activity, and theoretical optical basicity are discussed.

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Authors and Affiliations

  1. Department of Metallurgy, The University of Tokyo, 113, Tokyo, Japan

    Shigeko Nakamura (Research Associate) & Nobuo Sano (Professor)

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  1. Shigeko Nakamura
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  2. Nobuo Sano
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Nakamura, S., Sano, N. The redox equilibria of copper ions in the molten silicate fluxes as a measure of basicity. Metall Trans B 22, 823–829 (1991). https://doi.org/10.1007/BF02651159

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