Purge plug

Abstract

A purge plug adapted to be replaceably attached to the bottom of a lable for purging gas through a heat in the ladle. The purge plug comprises a ceramic body having at least one through gap which extends between the end faces of the body and a casing which encloses the body. The gas is fed to the external end face of the body in order to flow, at a predetermined pressure, through said gap to the internal end face of the body and into the heat. The ceramic body comprises an external, essentially sleeve-shaped body portion and an internal, truncated cone-shaped body portion. Between them said gap is arranged. The internal body portion is movable in relation to the external body portion and is pretensioned by a resilient means in a direction towards the heat to close the gap. A gas supply pipe is connected to a space beneath the external end face to open the gap.

Dependencies are inferred from the claim text.