2014 Volume 100 Issue 4 Pages 516-521
It has been reported that aluminum in liquid iron increase the rate of desulfurization by lowering oxygen potential and producing liquid calcium aluminate. In this study, the variations of the oxygen partial pressures during sulfur removal from hot metal were determined by employing an electrochemical technique involving stabilized zirconia electrolyte. The present experimental results demonstrated that aluminum could decrease the oxygen potentials in carbon-saturated liquid iron and thereby could decrease the equilibrium sulfur contents. The addition of nepheline as a substitute for fluorspar improved the rate of desulfurization due to the formation of liquid phase.
