Abstract: A production practice of aluminum deoxidation process combining with a stopper tundish was introduced in this paper. Aluminum ferromanganese was added as deoxidizer into the converter and calcium wires were introduced for inclusions calcium treatment into ladle furnace before the refining ending. Stopper tundish was applied to avoid casting accident of nozzle clogging caused by inclusions gathering around the nozzle so as to ensure the steady of casting process. Through the application of optimized process, the steelmaking and casting operations were stale and highly effective, and the test results of final product showed that the aluminum deoxidation could improve the steel deoxidation ratio remarkably with oxygen mass fraction less than 20×10^-6 and the inclusion level in the microstructure lowered evidently.

Key words: aluminum deoxidation, calcium treatment, stopper tundish, protective casting