Brief Introduction
Tundish Porous Upper NozzleTo solve clogging problem occurred on conventional tundish upper nozzle and submerged entry nozzle, AMR developed porous upper nozzle serial products including fast-change type and normal type. The replacement of SEN may be done during casting when using AMR serial fast change porous upper nozzles, and longer tundish casting sequence is obtained. AMR has offered porous upper nozzles to a decade of steelworks, gaining high customer satisfaction.
| Al2O3 % Min. | 80 | 80 | 80 | |
| C+SiC % Min. | 10 | 10 | ||
| Bulk Density g/cm3 Min. |
1100℃×24h |
3.15 | 3.1 | 3.15 |
| Cold Crushing Strength MPa Min. | 60 | 45 | 70 | |
| Modulus of Rupture MPa Min. | 12 | 10 | 15 | |
| Apparent Porosity % Max. | 10 | 16 | 15 | |
| Permeability % | - | 100 | - | |