Tundish Refractory Materials
Wear-Resistant Tundish Nozzle for Longevity
Tundish nozzles are an essential component in continuous casting operations. They are responsible for controlling the flow of molten metal from the tundish to the mold, ensuring smooth and consiste...
DESCRIPTION
Tundish nozzles are an essential component in continuous casting operations. They are responsible for controlling the flow of molten metal from the tundish to the mold, ensuring smooth and consistent casting. To achieve longevity, tundish nozzles must be wear-resistant and durable, as they are exposed to high temperatures and abrasion from the molten metal.
One effective way to enhance the wear resistance of tundish nozzles is by using ceramic materials. Ceramics have high hardness, excellent heat resistance, and superior wear resistance properties. They are also non-reactive and corrosion-resistant, making them suitable for use in harsh environments.
Incorporating ceramic materials into tundish nozzle design can significantly improve their lifespan, thereby reducing downtime and maintenance costs. Some of the commonly used ceramics for tundish nozzles include:
1. Alumina: It is the most widely used ceramic material for tundish nozzles. Alumina is a high-purity ceramic material that has excellent mechanical and thermal properties.
2. Zirconia: Zirconia is a tough ceramic material that exhibits exceptional wear resistance and mechanical strength, making it suitable for harsh environments.
3. Silicon Carbide: Silicon carbide is a high-performance ceramic material that possesses excellent wear resistance and thermal shock resistance.
Tundish nozzles made from these ceramics can withstand the high-temperature conditions of the casting process and offer superior wear resistance, translating into longer service life. The use of wear-resistant tundish nozzles also leads to consistent casting quality and higher productivity.
| Item | SX-1 | SX-2 | SX-3 | SX-4 | SX-5 | SX-6 | SX-7 | SX-8 |
| ZrO2+(Hf)O2% | >=70 | >=75 | >=80 | >=85 | >=90 | >=93 | >=93 | >=93 |
| Bulk Density g/cm3 | >=3.8 | >=4.0 | >=4.2 | >=4.4 | >=4.6 | >=4.9 | >=5.1 | >=5.2 |
| Apparent Porosity % | <=22 | <=22 | <=20 | <=20 | <=20 | <=15 | <=13 | <=10 |
| Mpa Compressive Strength | >=80 | >=80 | >=80 | >=80 | >=80 | >=90 | >=90 | >=100 |
| Thermal Shock Resistance (1100ºC cold water) | >5 | >5 | >5 | >5 | >5 | >5 | >5 | >5 |
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