| 摘要 |
<p>An oxygen lance (26), and a coating lance for refractory material (40), are disposed in upright and side-by- side relation for selective lowering into a BOF vessel when the latter is in the normal upright position that it occupies for refinement of its metallic charge. Preferably, the coating lance is lowered into the vessel immediately after the latter has been charged with scrap and molten iron and returned to its upright position. At this time the oxygen lance is in a standby position while refractory coating material is forced through the coating lance to repair various areas of the vessel lining. Thereafter, the coating lance is withdrawn from the vessel and the oxygen lance is inserted and the refining process is begun. At this time, the coating lance is held in a standby position. <IMAGE></p> |
