The appearance of high alumina refractory castables is powdery and sandy, which belongs to unshaped refractory materials. It is made of high-alumina raw materials as aggregate, powder, and binder to form a uniform mixture that can be easily molded and installed in various high-temperature applications.
| 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℃) | |||
1.High-Temperature Resistance 2.Impact Resistance 3.Low Bulk Density and Porosity 4.Good Wear Resistance 5.Excellent Chemical Resistance
1.Petrochemical industry: cracking furnace, sulfur recovery unit, etc. 2.Cement industry: lining of preheater, cyclone separator and cement rotary kiln 3.Steel industry: ladle, ladle cover, etc. 4.Heat treatment industry: heat treatment furnace, annealing furnace, tempering furnace, quenching tank, etc.