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The dephosphorization of hot metal with CaO-Al2O3-FexOy, 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-FexOy, fluxes, which are commonly used in hot metal treatment. The most suitable composition for dephosphorization was (38-45)CaO-(12-5)Al2O3-50FexOy, 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-FexOy, flux, but the desulphurization ratio of the new flux was about 20%.
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Ban-Ya et al. (1989) studied this question.
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