Abstract
The rate of dephosphorization of liquid iron-carbon alloys by FeO-CaO-SiO2 slaps and the effect o f NaCl or CaCl2 added to the slaps on the reaction rate have been investigated on a laboratory scale at temperatures of 1300-1460°C. The results show that the rate and degree of dephosphorization increase by the addition of NaCl or CaCl2 to the slag. But the degree of dephosphorization decreases with increasing temperature.It is found that the rate of dephosphorization of iron-carbon melt can be explained by the modified mass transfer controlled model in which mass transfer of iron and phosphorus across the slag-metal interface is controlled by diffusion while the evolution of CO gas is the chemical reaction controlled.
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