Introduction of Castable Refractory
Castable is a kind of mixture powder that mainly made from aggregates with a certain amount of binder. Castable refractory has strong fluidity and plasticity, so it must be mixed evenly with liquids for practical use.
AGRM is one of leading suppliers of castable refractory in China, producing kinds of castable refractories such as high alumina castable, corundum castable, etc.
High Alumina Castable
Introduction of High Alumina Castable
High alumina castable is a kind of castable refractory mainly made from alumina clinker with a certain amount of binder. It can be directly used mixing with water, and takes vibration pouring for molding. Therefore, it not only can be cast into an integral lining on industrial furnaces but also prefabricated into fire-resistant blocks.
Features of High Alumina Castable
- High strength and good wear resistance to withstand the abrasion of solid materials and the flushing of hot airflow.
- Good volume stability and acid resistance to withstand the erosion of acid substances in the furnace.
- Good thermal shock stability to resist material damage caused by furnace temperature changes.
- Good corrosion resistance to avoid lining cracking caused by erosion.
Application of High Alumina Castable
High alumina castable is widely used in different parts of furnace linings such as power plants, boilers, casting furnaces, heating furnaces, soaking pits, heat treatment furnaces, and induction furnaces.
| Refractoriness,℃ | ≥ | 1750 | |
| Service temperature,℃ | ≥ | 1400 | |
| Amount of water required for Casting(%) | 7.5%-8% | ||
| Volume-weight (kg/m3) | ≥ | 2500 | |
| AL2O3 | ≥ | 74% | |
| Fe2O3 | ＜ | 2.50% | |
| Compressive strength,MPa | 110℃×24h | ≥ | 30 |
| 1400℃×3h | ≥ | 35 | |
| Flexural strength,MPa | 110℃×24h | ≥ | 6 |
| 1400℃×3h | ≥ | 8 | |
| Thermal conductivity(W/M.K) | 300℃ | 1 | |
| 500℃ | 1.2 | ||
| Linear change rate, % | 1400℃×3h | ±0.3 | |
Corundum Castable
Introduction of Corundum Castable
Corundum castable is a kind of castable refractory mainly made from fused corundum with a certain amount of binder. It have several characteristics of high strength, good volume stability, excellent corrosion resistance,etc. Corundum castable is widely used in various industries such as cement, metallurgy and petrochemical industry.
Features of Corundum Castable
- Good high-temperature strength.
- Good wear resistance.
- High thermal conductivity.
- Thermal shock resistance.
- Good corrosion resistance.
- Good sealing performance.
Application of Corundum Castable
Corundum castable takes corundum as aggregate, it has higher mechanical strength and wear resistance than high alumina and mullite refractory castable. Corundum castable is mainly used as lining materials for rotary kiln, boiler, blast furnace hot blast stove, heating furnace, ceramic kiln and other kilns.
