| Title |
Study on the Refining of Stainless Steels using Oxidizing Fluxes |
| Authors |
김희수(Hee Su Kim); 김선효(Seon Hyo Kim); 이창희(Chang Hee Lee) |
| Abstract |
Dynamic features of dephosphorization of Cr containing steels by the oxidizing fluxes consisting of BaO, CaO and halides, are examined to determine possibility of efficient dephosphorization employing a laboratory-scale induction furnace. These oxidizing fluxes can dephosphorize steels more than 50% within refining times less than 10 minutes. In addition, these fluxes simultaneously show a very fast rate of desulfurization with a degree of desulfurization higher than 95%. The refining rate of dephosphorization was found to be controlled by liquid phase mass transfer. The results also show that a degree of dephosphorization increases as decreasing both initial Cr contents in steels and refining temperatures. The initial presence of Cr₂O₃in fluxes diminishes the amount of Cr loss in steels. The higher Cr₂O₃content within it`s solubility in a slag, the higher degree of dephosphorization. The highest degree of dephosphorization was obtained at slag compositions with high basicity and good fluidity. |