LANCE ASSEMBLY

摘要

PURPOSE: A lance assembly is provided to prevent the attachment of metal on a lance by emitting oxygen during a furnace blowing process. CONSTITUTION: A lance assembly comprises a lance and vent tube. The lance is extended in a longitudinal direction and has an inner gateway. The vent tube surrounds the outer circumference of the lance. A vent tube(100) prevents the attaching of metal to the outer circumference of the lance. The vent tube comprises a lower part vent tube(110) for tightening, a main body vent tube(120) and a cap vent tube(130). The cap vent tube is formed on the main body vent tube.