CaO 계 flux 에 의한 탄소포화용철의 탈인 및 탈황

1. The simultaneous dephosphorization and desulphurization of carbon saturated iron were possible with the use of fluxes which contained CaF₂, Na₂CO₃, Fe₂O₃or Na₂B₄O_7 in CaO base. 2, The high desulphurization degree over 80% was obtained within 20-25 minutes, but dephosphorization degree was comparatively low as showing 40-50% and rephosphorization was occured because of reduction loss of effective components such as iron oxide and Na₂O. 3. The distribution equilibrium of phosphorus between slag and metal was formulated quantitatively by estimating the effect of slag composition on P₂O_5 activity. 4. The rate of dephosphosization and desulphurization satisfied a first order reaction equation when driving forces were expressed by differences from equilibrium concentration. Apparent rate constants were variable with slag composition and it was considered that chemical reaction is a rate determining step.