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Help CenterLong Nozzle for Continous Casting Steel
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Refractory long nozzle plays an important role in protecting the molten steel from air oxidation when it flows from the tundish to the mold. It also averagely distributes steel into the mold and control the steel's fluid state in the mold. SM series of SEN features good thermal shock resistance, stability, corrosion resistance and anti-mechanical fracture. Every batch of products have passed rigorous NDT X-ray test before launching into the market.
Product
Items | AL-C Stopper | Mg Stopper | Turdish Nozzle | Long Nozzle | Subermaged Nozzle | |||
Body | head | Body | head | Body | Slag Line | |||
Al2O3 (%) | 60.7- 63.6 | 70.3- 71.5 | 60.7- 63.6 | 6.0- 7.2 | 63.3-67.8 | 63.6-65.9 | 58.2- 63.2 | - |
C+SiC (%) | 23.2- 26.3 | 15.8- 16.2 | 23.2- 26.3 | 11.5- 12.3 | 21.1-23.5 | 33.4-36.1 | 26.7- 29.2 | 15.2- 16.0 |
ZrO2+CaO (%) | ≥2.5 | 5.4- 5.8 | ≥2.5 | ≥5 | - | - | - | 72.0- 75.0 |
MgO % | - | - | - | 67.3- 68.0 | - | - | - | - |
Apparent Porosity ( %) ≥ | 15 | 17 | 15 | 13 | 14.6 | 16 | 16.2 | 12 |
Bulk Density (g/cm3 ) ≥ | 2.65 |
| 2.65 | 2.7 | 2.56 | 2.51 | 2.45 | 3.5 |
Thermal Shock Resistance (1100°C)(times)≥ | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
Cold Crushing Strength (Mpa) ≥ | 21 | 16 | 21 | 20 | 19 | 18 | 19 | 19 |
Modulus of Rupture (Mpa) ≥ | 5 | 5 | 5 | 5 | 5 | 5.5 | 5 | 5 |
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