DOPPMUNSTYCKE FOR KONTINUERLIG GJUTNING

摘要

In order to prevent blockage of the nozzle (1) during casting, the inner diameter of the lower nozzle portion (3) is greater than the inner diameter of the upper nozzle portion (2), a step at the border between the upper and lower nozzle portions (2, 3) being at least 3 mm in radial height (t) and having a step face (4) whose angle ( theta ) with respect to a line perpendicular to the central axis of the lower end of the upper nozzle portion (2) is in the range from +60 to -60 degrees. The part of the nozzle bore below the step face (4) is constituted by zirconia-graphite and the remainder by alumina-graphite.