| 摘要 |
<p>The device consists of a taphole (1) adjacent to means for blowing a bubbling-through agent into the steel bath (3). These means are immediately adjacent to the taphole, completely surround it and consist of permeable refractory elements (4, 5, 25, 44) each comprising at least one elongated segment (31, 35) made from a non-porous refractory material. Recesses run along both sides of the segment in the direction in which the gas is blown. Gas-dispensing means are arranged on the cold side of the elements and may consist of a chamber in the continuation of a metal box structure (32) which surrounds the segments made from refractory material (31, 35). In an alternative embodiment, flattened metal channels (33, 34) are arranged in the recesses and the gas is dispensed via an elongated chamber. The taphole preferably has the shape of a funnel (21) on the metal bath side and has a cross-section which decreases continuously in the direction of the cold side. <IMAGE></p> |
