General Overview
We manufacture complete range of zirconia metering nozzles used for the continuous casting of steel as a tundish refractory. Nozzles can be supplied as a solid piece or with outer high alumina body. .
Zirconia nozzles are manufactured from different type of raw materials, chemical content, physical specifications and sizes depending on the service application. We choose high quality zirconia as the main material. In order to improve the thermal shock stability, MgO, Y2O3, CaO stabilizing agents are added to the mix. These agents also improve the life of use.
At the moment, our zirconia metering nozzles are used by our customers with highly satisfaction.
Zirconia Nozzles can be divided into 3 groups such as:
- Metering Nozzle Inserts
- Exchangeable (Lower/Outer) Nozzle
- Stationary (Upper/Inner) Nozzle
Advantages
- Erosion resistance even in tough casting conditions
- Consistent casting speed and determined steel flow
- High resistance to oxygen effects
- Thermal shock resistance
- Long hours lifetime
- Improved metallurgical quality
- Flexibility in size and properties depending on casting conditions
- Use high quality raw materials
- Pure surface quality to ensure the maximum contact betwen two nozzle parts.
The range of chemical and physical properties is shown as below:
Physical Properties
Zirconia Insert Outers Porosity %
8-14
16-22
Bulk Density g/ml
4.9-5.4
2.8-3.7
Chemical Analysis Zirconia Insert Outers SiO2
0.5-1.1
15-33
TiO2
0.1-0.2
0.5-3.5
Fe2O3
0.05-0.5
1.0-2.0
Al2O3
0.1-1.0
65-95
CaO
0.05-2.0
0.05-0.3
MgO
1.8-2.6
0.1-1.0
Na2O
0.01-0.03
0.1-0.05
ZrO2
94-96
0-64
Y2O3
0.5-1.5
0
