| 摘要 |
<p>A purge plug (4) adapted to be replaceably attached to the bottom (3) of a ladle (1) for purging gas (21) through a heat (2) in the ladle. The purge plug comprises a ceramic body (8) having at least one through gap (12) which extends between the end faces (14, 15 and 16, 17) of the body and a casing (7) which encloses the body. The gas is fed to the external end face (14, 15) of the body in order to flow, at a predetermined pressure, through said gap (12) to the internal end face (16, 17) of the body and into the heat (2). The ceramic body (8) comprises an external, essentially sleeve-shaped body portion (9) and an internal, truncated cone-shaped body portion (11). Between them said gap (12) is arranged. The internal body portion (11) is movable in relation to the external body portion (9) and is pretensioned by a resilient means (18) in a direction towards the heat (2) to close the gap (12). A gas supply pipe (6) is connected to a space (19) beneath the external end face (14, 15) to open the gap (12).</p> |
