Description
This dry ramming material is formulated with high-purity microcrystalline quartz sand and powder, combined with high-temperature sintering agents and mineralizers. Its proprietary particle size distribution ensures a dense, monolithic lining through various ramming methods.
Application
Used as the working lining in coreless induction furnaces for melting and holding cast iron and steel.
Features
- Fine Quartz Grain Structure (6 μm–260 μm)
Eliminates the need for traditional H₃BO₃ (boric acid) and enhances α-cristobalite conversion during the first furnace sintering, significantly reducing baking time.
- Superior Performance
Excellent volume stability, thermal shock resistance, and high-temperature strength.
Maintains a loosely packed back lining during operation for optimal durability.
- Market Dominance
Widely adopted in non-ferrous metal refractory applications due to its reliability.
Parameter
| Item | HDD-1 | HDD-2 | HDD-3 | HDD-4 | |
|---|---|---|---|---|---|
| SiO2 | % | 98 | 98 | 98.5 | 98.5 |
| SiC | % | - | - | 5 | 5 |
| Modulus of rupture | 1450℃×3h | 15 | 15 | 16 | 16 |
| Crushing strength | MPa | 55 | 55 | 60 | 60 |
| Permanent linear change | % | -0.3~+0.5 | -0.3~+0.5 | -0.5~+0.5 | -0.5~+0.5 |
| Bulk density | g/cm3 | 1.95 | 1.9 | 1.95 | 1.9 |
| Refractoriness | ℃ | 1700 | 1750 | 1700 | 1750 |
