Abstract
To address the role of CaF2 in the CaO-CaF2-SiO2(-MgO) slag system employed for the production of low-pressure rotor steels, the thermodynamic aspects of the slag were investigated by equilibrating it with liquid iron at 1873 K in CaO or MgO crucibles. Presaturation of slag with an oxide block piece of CaO or MgO in a Pt crucible and application of a carbon paste to the outside of an oxide crucible were designed to prevent crucible failure during the slag-metal experiments. The liquidus isotherm and phase boundary of the preceding slag system were investigated using the slag-metal equilibria. Also, the effect of CaF2 on the sulfide capacity and the activity coefficient of Fe t O were of particular interest in controlling the sulfur level and cleanliness of low-pressure rotor steels.
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Choi, CH., Jo, SK., Kim, SH. et al. The effect of CaF2 on thermodynamics of CaO-CaF2-SiO2(-MgO) slags. Metall Mater Trans B 35, 115–120 (2004). https://doi.org/10.1007/s11663-004-0101-x
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DOI: https://doi.org/10.1007/s11663-004-0101-x