Rongsheng Refractories Group
Aluminosilicate ramming material – It is a type of fireproof material with high aluminum content and low iron content, and its main components are Al2O3 and SiO2. It is produced by high temperature sintering and high energy grinding or stuffing. It has a high operating temperature, strength and density and is mainly used in sought-after fireproof structures.
Parts made of aluminosilicate ramming material
Subject | Alumina-silicon | Silicon carbide | Zirconium Chrome Corundum | ||||
| KSL-1 | KSL- | KSL- | KSL- | KSL- | KSL- | KSL- | |
| Al2O3 % | ≥65 | ≥75 | ≥85 | / | / | / | ≥80 |
| SiC % | / | / | / | ≥40 | ≥60 | ≥70 | / |
| Cr2O3 % | / | / | / | / | / | / | ≥3 |
| ZrO2 % | / | / | / | / | / | / | ≥2 |
| Bulk density g/cm3 110℃×24h | ≥2.5 | ≥2.7 | ≥2.8 | ≥2.4 | ≥2.5 | ≥2.6 | ≥2.8 |
| Constant linear rate of change % 1000℃×3h | -0.4~0 | -0.5~0 | -0.5~0 | -0.4~0 | -0.5~0 | -0.6~0 | -0.6~0 |
| Cold crush strength MPa 1000℃×3h | ≥70 | ≥80 | ≥90 | ≥60 | ≥70 | ≥80 | ≥90 |
| Wear resistance at room temperature cm3 1000℃×3h | ≤7 | ≤6 | ≤5 | ≤7 | ≤6 | ≤5 | ≤5 |
| Thermal shock resistance 1000℃ water cooling cycle 1000℃×3 hours response | ≥30 | ≥30 | ≥25 | ≥30 | ≥35 | ≥40 | ≥30 |
| Plasticity index % | 15~55 | ||||||
| Thermal conductivity W/(m·K) 1000℃ | 1.1~1.6 | 1.6~2.0 | 3~5 | 5~7 | 6~8 | 2~3 | |
Production of aluminosilicate ramming mass
During the production process, aluminosilicate ramming materials usually have to go through multiple processes, such as sifting, drying, mixing, rubbing, etc., to ensure their uniformity and stability. The manufacturing process and formulation can be adjusted to suit different needs to achieve the required fire resistance and service life.
Features of aluminosilicate ramming mass
- High aluminum content and low iron content: Al2O3 content is usually 55-80%, Fe2O3 content is very low, usually no more 3%. It can greatly increase the softening temperature and use.
- Dense structure: The aluminosilicate ramming material has been compacted to produce an extremely fine grain structure and higher density, usually exceeding 3,4 g/cm3, which significantly increases its strength and resistance to slag erosion.
- High corrosion resistance: The high aluminum, low iron composition and dense microstructure give the aluminosilicate packing material high resistance to acids and alkalis, as well as to corrosion by various slags.
- High strength: The compressive strength of aluminosilicate ramming material exceeds 600 MPa, which allows it to withstand high mechanical loads and operational loads.
- High operating temperature: Usually, it can operate at temperatures above 1600-1800°C, and the maximum temperature of special varieties can reach above 2000°C.
