Abstract
In the present work the solid solubilities of CaS and CaSQ, in burnt lime were investigated by equilibrating lime with CO-CO2-SO2 mixtures at temperatures from 950 to 1300°C. Also, the equilibrium constants for the formation of CaS and CaSO4 were determined. At high oxy-gen activities, corresponding to a CO2/CO ratio >100 in the gas, the sulfur dissolves in lime primarily as sulfate ions. At lower oxygen activities (CO2/CO <30), the sulfur goes into so-lution in lime essentially as sulfide ions. Over the temperature range investigated the limit-ing sulfide solubility is within 0.01 to 0.03 pct S, whereas the sulfate solubility is within 0.03 to 0.1 pct S, increasing with increasing temperature.
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An erratum to this article is available at http://dx.doi.org/10.1007/BF02658425.
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Turkdogan, E.T., Rice, B.B. & Vinters, J.V. Sulfide and sulfate solid solubility in lime, magnesia, and calcined dolomite: Part I. CaS and CaSO4 solubility in CaO. Metall Trans 5, 1527–1535 (1974). https://doi.org/10.1007/BF02646322
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DOI: https://doi.org/10.1007/BF02646322