Abstract
Equilibrium oxygen, phosphorus and sulphur distribution between liquid iron and CaO-Al2O3-FetO slag saturated with CaO has been studied at the temperature range from 1 550 to 1 650°C in order to know the applicability of the slag to secondary refining of steel and the approximate validity of the regular solution model for the aluminate slag.As the results, it is guessed that CaO saturated CaO-Al-2O3-FetO slag would be useful the secondary refining of steel. It was confirmed that regular solution model was satisfied for oxygen distribution between liquid iron and aluminate slag as well as that between liquid iron and silicate or phosphate slag in our previous work. Sulphur distribution ratio and sulphide capacity of the aluminate slag were determined as the function of slag composition and temperature.
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