| 摘要 |
<p>A plug of refractory material is used in a steel converter to minimize tapping off of slag. In use it floats at the steel/slag interface and lodges in the taphole to indicate the end of tapping. The plug has a polyhedral shape and is shankless. To improve its ability to roll the plug has a surface which consists of a plurality of generally flat faces 8a,9a,11,12,13 lying in respective planes with the planes of every adjacent pair of faces intersecting at angles not less than 90 DEG and the plane of each face intersecting the plane of at least one adjacent face at an angle greater than 90 DEG . Preferably the plug has two symmetrical tapering halves 8,9.</p> |
