Abstract
The CaS solubility and sulfide capacity for the CaO–SiO2–CaF2 and CaO–Al2O3–SiO2 systems have been measured at 1300°C and 1400°C, respectively.With the CaO–SiO2–CaF2 system, the slag doubly saturated with CaO and 3CaO · SiO2 has the highest CaS solubility of 12.5 wt.%. On the liquidus the slag always has a higher CaS solubility than when it is not on the liquidus. The sulfide capacity was confirmed to decrease with increasing SiO2 content.With the CaO–Al2O3–SiO2 system, the CaS solubility was found to depend only on CaO content. A good correlation between the sulfide capacity and the CaS solubility was observed as expected from theory.The temperature dependence of CaS solubility in those systems was also discussed.
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