Influence of Sulfur Content and Temperature on the Carbon Boil and CO Generation in Fe–C–S Drops
Kevin Gao, Veena Sahajwalla, Haiping Sun, Charles Wheatley, Rod Dry
Carbon boil in liquid iron has been studied as a function of some key parameters such as sulfur content (0.005–0.4%) and temperature (1370–1450°C) in a horizontal tube furnace. The metal–gas reactions and their time dependence, that is their dynamic nature, were observed in-situ at the temperature of interest. Experiments of Fe–C–S drops were also conducted in a vertical super-kanthal tube furnace to permit rapid quenching of metal drops and their subsequent analysis. The starting time of carbon boil phenomenon was determined using a CCD camera coupled with a time/date generator connected to a video recorder. The initiation time of carbon boil was in the range ∼5 and ∼20 sec under the conditions in this study. Mechanism for carbon boil has been proposed.