Advanced Cold Start Submerged Entry Nozzle (SEN)
(Room 410)
16 May 16
10:00 AM
-
10:30 AM
Tracks:
Tundish to Mold Refractories
In general, submerged entry nozzles (SENs) consists of a main body (alumina-graphite) and powder line (zirconia-graphite) materials. Usually high alumina and zirconia are used for improving corrosion resistance. Contrary spalling resistance should be decreased. Therefore, to prevent thermal shock at start cast, the SEN is heated before use. There are cases when the SEN has to be changed during casting due to erosion or clogging incident. Hence it is popular to keep the SEN preheated to use anytime for emergency. However, it is sometimes experienced that a SEN has to be scrapped due to change in casting schedule or long preheating time. To solve this problem, Krosaki Harima developed a cold start SEN with excellent corrosion and thermal shock resistance. Its characteristics and actual results are reported in this paper.