BOTTOM POURING LADLE

摘要

PURPOSE:To extend the service life of nozzle and head parts by constituting the nozzle and head part of boron nitride. CONSTITUTION:A bottom pouring ladle has a pouring nozzle 5 in the bottom of a ladle body 4 and a head part 6a for opening and shutting the nozzle 5 and has a stopping rod 6 in a ladle body 4. The nozzle 5 and head part 6a are constituted of the boron nitride. A protective layer consisting of boron nitride powder and inorg. binder is provided to the surfaces of the nozzle 5 and head part 6a in contact with a molten metal if necessary.