Product List
- Refractory Fibers
- Shaped Refractories
- Monolithic Refractories
NSP-21
The product is designed to prevent the adhesion of splash molten metal generated during steelmaking and smelting operations, thereby enhancing detachability. It improves the safety and efficiency of operations by facilitating the separation of molten metal (such as slag) from equipment, including slag ports, and protecting containers.
Product Features
When applied as a coating to equipment surfaces, the molten metal encounters fine protrusions of ceramic fibers, generating a lotus effect. This minimizes friction resistance on the coating layer's surface, ensuring that the surface tension of the molten metal is maintained, allowing for easy separation.
Chemical Composition: Composed primarily of SiO2, Al2O3, ZrO2, and C.
Physical Properties: The coating layer is structured to form ceramic fiber nano-protrusions on the surface using ceramic fibers.
15 µm thick CERAMIC FIBER
3545 µm size impression graphite
Chemical Composition
| Material group | Guaranteed | Typical |
|---|---|---|
| SiO2 | 60%≤ | 65.4% |
| Al2O3 | 8%≤ | 10.4% |
| ZrO2 | 5%≤ | 6.9% |
| Na2O | - | 1.5% |
| C | 10%≤ | 15.4% |
Applicable Equipment
- Top molten metal inlet of the Torpedo car
- Steelmaking ladles, turndishes
- Electric furnace hearth, lance, slag pot, and other steelmaking and ironmaking equipment where molten metal (slag) splashes and adheres, used extensively in such areas.
Refractory / NSP21 / Applications
Refractory / NSP21 / Supply Performance
-
POSCO STS No. 2, 3, 4 Steelmaking
- Converter taphole lance, slag pot
-
POSCO No. 2 Steelmaking
- Converter blowing lance
-
POSCO Finex Plants No. 2, 3
- Runner, taphole, splash cover, etc.
-
POSCO No. 2 Blast Furnace
- Blast furnace taphole
-
Dangjin Hyundai Steel
- Converter tapping hole, etc.
