Tundish Lower Nozzle for ladles are made from corundum, bauxite, flake graphite, anti-oxidants and phenolic resins. They show features of excellent thermal shock resistance, stable performance, good corrosion and erosion resistance, and strong cracking resistance.
Tundish lower nozzle
The upper and lower nozzle are composed of three parts, the outer coat is aluminum-carbon, the inner core is zirconium, and the base brick is aluminum-magnesium carbon.By the precision process formula compression molding, high temperature firing assembly.
Product features:
The product has the characteristics of good thermal stability, erosion resistance, high safety coefficient.
Chemical analysis and Physical Properties:
Items | Upper Nozzle | Lower Nozzle | Well Block | ||
| Zirconia core | Outside | Zirconia core | Outside | ||
| ZrO2+HfO2(%) | ≥95 | ≥95 | |||
| Al2O3(%) | ≥85 | ≥85 | ≥85 | ||
| MgO(%) | ≥10 | ||||
| C(%) | ≥3 | ≥3 | ≥12 | ||
| Buik Density g/cm³ | ≥5.2 | ≥2.6 | ≥5.1 | ≥2.6 | ≥2.6 |
| Apparent porosity % | ≤10 | ≤20 | ≤13 | ≤20 | ≤21 |
| Crushing strength Mpa | ≥100 | ≥45 | ≥100 | ≥45 | ≥45 |
| Thermal shock resistance | ≥5 | ≥5 | ≥5 | ≥5 | |
Tundish upper nozzle