Monoblock Stopper,Refractory Stopper:
1.has passed ISO certified.
2.can resist oxidation and erosion
3.high stability and high strength
4.can strongly resist brush
1.has passed ISO certified.
2.can resist oxidation and erosion
3.high stability and high strength
4.can strongly resist brush
Monoblock Stopper is be divided into two kind,blow argon and non-blow argon.which is mainly used to adjust the steel liquid flow into the moudle and prevent the nozzle blocking blow argon or non-blow argon.
| Items | stopper head | stopper body | stopper head | stopper body |
| Al2O3,%≥ | 65 | 45 | - | 45 |
| MgO,%≤ | - | - | 60 | - |
| SiO2,%≤ | 5 | - | 8 | - |
| C+SiC,%≥ | 20 | 25 | 15 | 22 |
| cold compressive strength,Mpa≥ | 25 | 22 | 22 | 20 |
| cold modulus of rupture,Mpa≥ | 7 | 7 | 6 | 6 |
| apparent porosity,%≤ | 16 | 18 | 17 | 18 |
| bulk density,g/cm3≥ | 2.70 | 2.35 | 2.60 | 2.40 |
| thermal shock resistance,times≥ | 5 | 5 | 5 | 5 |