CaO-Al₂O₃-Fe_xO_y系フラックスによる溶銑の脱りん,脱硫処理

抄録

The dephosphorization of hot metal with CaO-Al₂O₃-Fe_xO_y, flux was studied at 1 350°C to develop a new kind of flux to be substituted for the Na₂CO₃-based and CaO-Calcium halides-Fe_xO_y, fluxes, which are commonly used in hot metal treatment. The most suitable composition for dephosphorization was (38-45)CaO-(12-5)Al₂O₃-50Fe_xO_y, by weight percentage. The apparent phosphorus distribution ratio, (%P)/[%P], was 150, and the dephosphorization ratio was 80% with the consumption of 40 kg per ton of hot metal. These results were almost similar to those of CaO-Calcium halides-Fe_xO_y, flux, but the desulphurization ratio of the new flux was about 20%.