High alumina castable is easy to install, customizable and highly adaptable. It has good fire resistance and thermal shock resistance. Used for high temperature parts in steel, cement, power industries, and linings of chemical and non ferrous metal smelting equipment.
High alumina castable is also known as calcium clinker. It is made of industrial alumina powder and selected limestone powder as raw materials. The alumina conventional castables is produced under rotating high temperatures and ground into a powder.
As we can know from the name of product, alumina castable contains more Al2O3 than other kinds of refractory castable. Therefore, it brings higher refractoriness and many excellent performances. Commonly, Kerui delivers these products in a dry form in bags. It has extensive application in industrial applications where high heat, wear and corrosion resistance are required.
| Item/Grade | GLJ-50 | GLJ-60 | GLJ-65 | GLJ-70 | GLJ-80 | |
| ω (Al2O3) ≥/% | 50 | 60 | 65 | 70 | 80 | |
| Refractoriness ≥/℃ | 1700 | 1720 | 1720 | 1720 | 1780 | |
| Bulk Density ≥/ (g/cm³) | 110℃*24h | 2.15 | 2.30 | 2.40 | 2.45 | 2.65 |
| Cold Modulus of Rupture ≥/MPa | 4.0 | 5.0 | 6.0 | 6.0 | 7.0 | |
| Cold Crushing Strength ≥/Mpa | 25 | 30 | 35 | 35 | 40 | |
| Permanent Linear Change (T/℃*3h)/% | ±0.8 (1350℃) | ±0.8 (1400℃) | ±0.8 (1500℃) | |||
Al₂O₃:46%-60%;
Fe₂O₃: 0.7%-1.0%;
Operating Temp:1300-1500℃;
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