Effect of Reduced Flux Iron Ore Pellets on Removal of Impurities from Pig Iron During Induction Melting: A New Phenomenon

摘要

The present work represents a comparative study of impurity removal (sulfur, phosphorus, and carbon) from pig iron melt by the addition of lime powder and reduced fluxed iron ore pellets separately in a 5-kg-capacity induction melting furnace. Two types of reduced flux pellets (80% and 50%) of similar basicity (~3.06) were charged separately into the pool to obtain the different oxidizing atmospheres of the bath. Results showed that the rate of impurity removal increases up to 6?min of exposure time and decreases afterward. Only lime powder charging, sulfur (~77%), and a small fraction of carbon were removed from pig iron. Phosphorous (~41%), sulfur (~53%), and carbon (~96%) were removed simultaneously when 80% reduced fluxed pellets were used. The present study indicates that the optimum removal of impurities is possible by charging 80% reduced flux iron ore pellets from the pig iron melt.